Manual / Guide · 1940s-1950s
933-page compilation of AE adjustment requirements for relays, Strowger switches, line switches, keys and jacks. The core maintenance reference for a working SxS system.
/Z .9/f- CffH.# Automatic Electric STANDARD ADJUSTMENTS TCI Library www.telephonecollectors.info :~ ~ .. ~ ,. TCI Library www.telephonecollectors.info I 77 ISSUE N0.1 RETYPED C<r-3lll4 CLASS B 9-1-54 CHANGED STANDARD ADJUSTMENT FOR fARA. r:-1 CENERAL REQUIREMENTS cfi·~~.l!.':;_ ThviS /122 A - WOSE PARTS: 1. Unless otherwise specified, all screws and nuts shall be tight. 2. All coils, relays, and other parts shall be securely mounted or assembled. B - IEFECTIVE PARTS: 1. SCreWB 1 nuts, and other parts shall not be marred or mutilated excessively nor shall they be defective in any manner. 2. All individual parts or assemblies shall agree in material, fonn, and dimensions with the associated piece-part or assembly drawings unless otherwise specified. C - WIRING AND INSULATI(J{: 1. All wiring shall be arranged in a neat and workmanlike manner, and shall not have unnecessary solder or exposed bare wire. 2. All wires shall have a little slack, unless otherwise specified and shall be so placed as not to interfere with moving parts. J. All insulated parts shall stand a 1/4 second breakdown test with 500 volts A.C. unless otherwise specified. D - SPRINGS, CONTACTS AND BUSHING: ' 1. Spring assemblies shall have springs, contacts and bushing well aligned. 2. The following gradual bow in the free length of any spring is permissible but there shall be no sharp bends or kinks in the springs due to adjustment. ~adj. - Maximum .020 11 Test - Maximum .025" In the case of horizontal relay twin contact springs, amature springs may alao be bowed !ran armature or spring bushing to contact end of spring when operated or at normal provided the above requirement is met when the springs are not making contact. AUTOMATIC ELECTRIC COMPANY CHICAGO, U.S. A. I """· t1---·.---..-1--. . .P-A-GE~l~Q-,-3~--t Q UK. TCI Library www.telephonecollectors.info .A-100 J. In spring pile-ups having more than one back contact, an effort- shall be made to distribute wiiformly the pressure of the lever springs against the back springs. In spring pile-ups having no back contacts, an effort shall be made to distribute the tensions uniformly among the lever springs, unless otherwise specified. !iQ!§.: This requirements may be considered to have been met if each armature spring rests against the a:nnature bushing, associated back contact or preceding a:nnature spring, as the case may be, when the pressure of the succeeding spring or springs is relieved or if at least a perceptible follow of each back contact spring occurs upon manual operation of the relay. The follow may be gauged by eye. 4. Contacts shall not be out of alignment with respect to each other more than 1/3 of their diameter measured at the base of the contact points as gauged by eye. fil!!:!: Eighteen or twenty-one gauge contacts of the new contour introduced during 1939 may be out of alignment with respect to each other by not more than 40 per cent of their diameter measured at the base of the contact points as gauged by eye. 5. Bushings shall be approximately in alignment with the center of the springs against which they strike, as gauged by eye. E - COILS: 1. Coils shall measure within plus or minus 5% o! their specified resistance unless otherwise specified. The resistance values of the windings are based upon a normal temperature of 68°F., and unless otherwise specified, the resistance shall be measured at this temperature or temperature correction values shall be applied to compensate for other temperatures. 2. Coil covers shall fit neatly and securely on coils. F - RESIDUALS: l. 2. stationary residuals shall fit tightly to core ends. Adjustable residual screws shall have slightly rounded ends and shall be adjusted as specified on the relay adjustment sheet. G - SCREW ADJUST¥ENTS: 1. All adjusting screws, except as noted in <:r2 and G-3 below, as finally adjusted, shall have unused threads aTailable for future adjustment. AUTOMATIC ELECTRIC COMPANY CHICAGO, U. S. A. . DR. 11.it1K. 0 .._._ _ _ _ _ __,._ _ _....._ _ __.._ _ _... ~ I I PAGE 2 OF 3 TCI Library www.telephonecollectors.info A-100 2. All. adjusting screws on strowger switches, except as noted in G-3 below, as finally adjusted shall have at least two unused threads available for future adjustment. filIT!: J. In the case of the rotary pawl guide screw, which is a slotted headless screw, the two unused threads shall be considered from the end of the screw and not fran the bottom of the slot. Rotary and vertical magnet screws on Strowger switches, as .finally adjusted shall have a minimum of .020 11 available for future adjustment in either direction. H - CLEANLINESS AND 'lfORKlJi.ANSHIP: 1. Equipment shall be .free from grease, grit, or any other foreign matter which is likely to impair operation or detract fran appearance. 2. All parts entering into the construction of horizontal relays shall be free from burrs, cracks, or bends (with the exception of bends in the contact springs incidental to adjusting) not canmon to their design. J. All equipment shall be manufactured according to generally accepted standards of good workmanship. FEW:EJJ REVISED: FEW :EMJ REVISED: RJl{:HV RETYPED: AR RETYPED: ML RETYPED: SS REVISED: JVB:SS AUTOMATIC ELECTRIC COMPANY CHICAGO, U.S. A. ' . -..---.~. -~ - ---~~~~~~~~~- t1----.,---.. 0. u... I"""· 1i--o--+-P-1_GE_3_0F_3_--I TCI Library www.telephonecollectors.info A-100 TCI Library www.telephonecollectors.info Fll-1177 ISSUE.ftO. 1 ~''~RETYPED STANDARD ADJUS'IMENT 8-<l-l:i6 STROWGER SWITCH SHE.l.F JACKS, BASES, covms, TEST JACKS AND BUSY KEIS ~-\ FOR I - IN'l'BODUCTION Thie adjustment pertains to the tollowing portions ot the apparatus making up a Strowger Switch Assembly; Shelf Jacks, Bases, Covers, Test Jacks and Busy Keys. Standard Adjustments A-100, A-120, A-121, A-122, A-123, A-124, A-126, A-130, A-131, A-132, A-133, A-134, A·l35, A-136, A-140 and A-141, together with this adjustment complete the requirements !or Switch Mechanisms. II - ROUTINE INSP:&:TION Shelf Jacks Very little"readjustment will be necessary for shelf jacks. To be certain ot proper tension ot the jack springs against the switch jacks, the requirements III-B-1 should be checked. It jack springs are readjusted to meet this requirement, they should be inspected to see that they also meet the remaining requirements, Sections III-B-2 & 3. When adjacent jack springs are required to make contact when a switch is not in the jack, they should be inspected and ad.justed 1.f' necessary according to Section III-B-4. The bases will in general not require any adjustment after leaving the Factory. Should they become loose in the shelf, however, the adjustment in Section III-C-1 should be made. Covers The covers are properly titted at the Factory and will not require additional adjustment. When removing and replacing a cover, care should be taken so that it does not strike the switch or associated relays. Test Jacks The test jacks should be checked for proper spring tensions and ease or insertion of the test plugs, Section III-E. Busy Keys In general, because or the emal.l amount ot use they receive, busy key springs will not require readjustment. It they should, the cam spring should be tensioned to give the required tollt>w or the break contact spring and the make spring then adjusted to secure proper make contact tollow; care being taken to see that the break contacts break before the make contacts make. Section III-F. AUTOMATIC ELECTRIC COMPANY CHICAGO, u. s. A. ~a-------..-----4ti-u-n.__,.l_"'"""---1 I I PAGE 1 OF 4 c TCI Library www.telephonecollectors.info A-101. III - SPECIFIC R.JiaUIR]MENTS A - GENERAL: 1. The parts shall meet the general requirements specified in A-100 which are applicable. B - SHELF JACKS: 1. When the switch jack is removed from the jack, the clearance between each pair of jack springs shall be minimum .020 11 , maximum .050", gauged at the closest point between the available contacting surfaces. 2. The springs of a pair shall be approximately parallel except as specified below: (a) The forming of the tips, terminals, etc., shall not be altered from that specified on the manufacturing print, to obtain the above result except as noted in B-4. J. There shall be perceptible clearance between adjacent springs not in the same pair when a switch jack is properly inserted in the shelf jack. 4. When adjacent jack springs are required to make contact when a switch is not in the jack, the springs required to make contact shall be tensioned against each other so that when the pressure of one spring of the pair is removed, its mate will follow approximately to the outside edge of the opposing spring or approximately J/64 11 • The contact surface of the springs shall not be bent in meeting this requirement. C - BASE'S: 1. The angles of the relay or switch bases which .fonn the lower part of the upper mounting slots and the extreme lower angles ot the rear of the base shall be bent out to hold the base approximately centered in the shelf mounting space. 2. The location of the relay insulator in respect to the mounting plate shall be such that the coil terminal clearance holes are approximately concentric with the holes in the mounting plate, as judged visually. D - COVERS: 1. Ea.ch front switch cover shall rest on the top surface of the mounting plate and on the felt ring (when used) of the lower cover plate. When the insulated ring is used on the front cover instead of the felt ring on the lower cover plate, the space between this insulated ring and the lower cover plate on the switch shall not be greater than J/32" at allY' point. The cover shall also fit snugly on the sides of the mounting plate. 2. When a minor switch is mounted on the mounting plate, its tenth bank contact soldering terminals shall be bent apart so that they will not make contact with this cover. ~..., AUTOMATIC ELECTRIC COMPANY ci CHICAGO, u. s. A. c ____________...______...,______._I "'"""______. un. I I PAGE 2 OF 4 TCI Library www.telephonecollectors.info A-101 J. The cover shall not interfere with any of the apparatus on the mounting plate. 4. Covers shall not bind enough to cause difficulty when being mounted or removed. 5. The back cover shall be securely held with its top edge against the mounting plate by the clamping spring. When the apparatus units are mounted on the mounting plate, the back cover shall not make contact with aey or their terminals. E - TEST JACKS: 1. The spring tips of test jacks shall be bent (when necessary) to such an extent that the plug corresponding to a given jack will readily enter the jack when the plug is held at approximately a 10• angle above the horizontal. 2. With the plug in position, each jack spring shall make contact with its corresponding plug terminal, and adjacent pairs shall have a clearance ot minimum 1/32". J. Cut-off jack assemblies shall also meet the following requirements: (a) The middle spring shall rest against the top spring with a pressure or minimum 35 grams, maximum 65 grams. F - BUSY KEYS: 1. The cam spring shall contact the cam the tul.l width of the cam surface. 2. (a) Make and break springs shall have .015" minimum follow as judged visually. (b) For twin contact assemblies make and break springs shall have .02011 minimum follow as judged vis~ally. !Q!i: On make before break combinations, the break spring need not meet the tollow requirement but shall have a contact pressure of minimum 50 grams. In any sprlng pile-up, all break contacts except the break of a make before break combination shall open before any make contacts close, ls judged visually. J. With the key at normal and one side of .. he tonned end err the cam spring resting against the cam slot, there shall be .005 11 minimum, .020" maximum clearance between the other side of the formed end of the cam spring and the cam slot. When the first spring is a cam spring, the clearance will not be required but the tension ot the caa spring against the cam shall not exceed 120 grams measured at the eni of the spring. !QI!: The springs may be bent to meet r.his adjustment. AUTOMATIC ELECTRIC COMPANY CHICAGO, U. S. A. ci ~ c I ""K. ....----...I ------.----..... """"' --... I J OF 4 ut • P~GE TCI Library www.telephonecollectors.info ------~ A-101 4. There shall be mini.mwn .01011 clearance between all springs and the fiat side or the frame and last spring or the pile-up and the end o! the frame. 5. There shall be minimum perceptible clearance between the cam spring and the bushing ot the eecond moving spring. 6. When twin contact apriBaa are used the two pairs or twin contacts shall make or break within .002 11 ot each other as judged visually. (.003 11 tor inspection). J!QII: A pair o! contacts consists ot one ot the contacts or a lner spring and one or the contacts ot a break or make spring. For example, a make combination consists ot two pairs ot contacts. REVISED BY: LWD:ES KJC:MC JVB:SS RETYPED: :SS AUTOMATIC ELECTRIC COMPANY CHICAGO, u. s. A. o.,_______.,..___.,u_n.--··~""""~--I I I PAGE 4 OF 4 t TCI Library www.telephonecollectors.info A-101 FM·l377 ISSUE NO. I RE~=-s- STANDARD ADJUSTMENT ISSUE: #32 HORIZONTAL ftELAYS, THRSE-POLE .RELAYS, FOR SHOR!' LEVER ARMATURE HELAYS, AND TYPE #28 "Z" fiELAYS INTOODUCTION The horizontal, Type #28 "Z" and short lever armature relays consist of the .followin~ parts: coll assembly, heel piece, annature assembly, and spring assembly or assemblies. The three-pole relay has two or more windings in 2 sections with a third magnetic pole located between the two sections and extending around to the front of the armature. Definitions: various tenns used in the requirements throughout this standard adjustment \Till have the .following meaning: "Contact Springs" are the individual springs o.f a spring combination. "Spring Combination" is a spring group actuated by a single armature or lever spring. "Spring Pile-Up" is an a!lsembly of all the springs operated by one armature arm. "Spring Assembly" consists o.f all o.f the spring combinations on one rel~. "Two-Step Operation ~lays" are relays having separate electrical requirements for one or more pairs of contact sprinCS.• ()l the horizontal and Type #28 11 2" relays, the lever ratio bet""•een residual screw and armature buffer i• about 2.25 to 1, and on the short lever armature relays this ratio is about 1 to l. The assembly screws are tightened after the insulatera have been heated and while the pile-ups are under pressure. Any changes in spring pile-ups shoula preferably, therefore, be made at the factory. ROOTINE INSPECTION The inspection of the relay should be in the .following order, with readjustments made only as necessary. Where limits of adjustments are given, the relay should be inspected with the extreme 11.r.dting valus and readjusted only i f it is found to be outside these limits. Devi~tion fra::i noirJ.nal values is to be e:xpected and is not cause for readjustment. Amiature - Check armature .for freedom from bind per Section C-2. The 11 air line" or arrnature--heel piece gap should exist but be no greater than .004 11 • (see section C-1). If necessary to reset the "air line" the residual, if adjustable, should first be set at -o-. The residual ga,> is the space between the armature and core face when the relay is operated. The residual gap is adjusted to the value specified on Relay Adjustment Sheets, after setting of the annature heel piece air line, by tuming the brass screw on the annature, unless the residual ia or the "fixed" type. ,iee Section D and 1'"'ig. 1 on Page 10. . AUTOMATIC ELECTRIC COMPANY a CHICAGO, u. s. A. ' DR. 1~"~ l----.----r---"11~~~~~~--t I I PAGE 1 OF 10 TCI Library www.telephonecollectors.info A-UO - With the springs tensioned to their approxima~e margining value. check the r~ay gauging; that is, the position of the armature with respect to the coil core when the contacts make or break contact. as shown Oft Relay Adjustment Sheets. See Sections E-1, 2, ), (a), J(b), J (e), J(f), J(g), 4. Note Figs. 2, J, 5 on page 10. Gaugi~ If the gauging is such that it falls within the limits specified (Section E-2, J), no readjustment is necessary. Contacts will wear either· from mechanical friction or from arcing, or both, and so readjustment may be necessary occasionally. Stroke Adjustment - The required armature travel (•Str~ke" adjustment specified on Relay Adjustment Sheets) should be checked. See Secti<ln E-3(d). Note Fig. 4, page 10. Margining - Contact pressure between the armature springs and back contacts is controlled by specifying values of current !low which w.i.11 not operate the assembly. In order to meet such a requirement. it is necessary that the armature springs be adjusted to provide sui'ficient load so that, when the specified non-operate current is flowing in the coil, the armature cannot operate. These values of current and/or series resistance are specified on Relay Adjustment Sheets. Check the relay margining. Sections E-6. 7. 8, 9 and F. Note Fig. 6 on Page 10. If upon testing in service, the margining of the rel.ay is within the range of the •Test• values, no readjustment is necessary, but any relay whose operating range is outside of the "Test" values, should then be readjusted within "Readjust• limits. If any readjustment is required to meet the margining values, the ga~ing should then be rechecked. In all cases where specific requirements belOlf are a.t variance with notes on the pertinent prints, orders, relay adjustment sheets, or circuit drawings, as specific requirements below which conflict shall be disregarded. SPECIFIC REQUIREMENTS A. General 1. These relays shall meet the general requireme~ts specified in A-100, which are applicable. 2. Prior to the application of the specified finish on the armature and core, the surfaces of these parts which are adjacent in the relay assembly shall be free of all burra, tool marks. and protrusions, presenting as smooth and uniform arsur!&ce as is practical and commercially possible to obtain. Note a Either of these surfaces meets this requirement if it can be placed against a flat surface of at least equal area without !orming a visible air gap between 'bbe two surfaces that is longer than 1/.3 of the diameter of the core. Visibility of the air gap i• to be detennined by visual inspection without the aid or 11.&ht more intense than indirect sunlight. AUTOMATIC ELECTRIC COMPANY CHICAGO, U. S. A. . DR. 1~""' 01-----.----.----1-"!""""!!""'~--"!"""'"!"""-I ~ I I PAGE 2 OF 10 TCI Library www.telephonecollectors.info A-llO •z• relays (pin bearing) shall meet the requirements herein. 4. When a •z• relay is mounted on the .frame o! a Strawger Ritch, the relay ). Type 128 armature shall clear the neareat point on the lower rota1"7 magnet coil s~ool head by ain1mull l/J2•. B. Al.is1'll!\ent. l. When rel.a;rs are mounted on their auociated mounting plates, the relays shall be properly aligned. There shall be a minimum space of l/J2" between the a~ture or springs of allY' relay and the ar.ture, springs, or heel piece ot the relay above, or below it, and tlM armature back stop of a~ relay •hall not touch the heel piece o.f the relay above it. This •Y be gauged visually. 2. In either the normal or operated position, there shall be a clearance o! .01()11 minillUJD between sprincs not designed to make contact. J. All contact springs, when assembled on the rel.Jly, •hall line up unitoral.y with respect to each other and to the relay structure proper as gauged Tisual.ly. 4. On rela;ys equipped with creepage insulators, there shall be perceptible clearance between aprincs and adjacent creepage insulators in all positions. 5. On relays haTing l.Jlrger than no~l insulation between adjacent •prings, the armature •prings shall be parallel to heel piece and the stationary •pringa bent at the in•ulatora to meet the break and make gauging. 6. Spring operating buahings shall be approximately in alignment with the center or an perpendicular to the springs against ltd.ch they strike, as gauged visually. 7. (a) (b) On break ccmb1Mt1ons, disk type contacts sh.all not be out o! alignment (gauged visually) by more than l/S ot their !ace diameter, and in their nor11&l position shall be engaged b7 not leH than 1/2 ot the area o! the contact .faces. (A barely perceptible gap caused by contact tace irregularities, etc., ahall be regarded as a closed contact.) On break ccabinatione, large dome-f'aced or connx oontacta shall not be out ot aUcnment (gauged Tiaually) by more than l/S o! their !ace diameter, and in t.heir normal position ahall •ke contact a\ approxi•te~ the B. (a) (b) center ot their !aces. On make ccabinations. disk type contacts shall not. be 0'1t ot alilnment (gauged visual.J.J') by more than l/S o.f their face diameter. and shall be engaged by not less than 1/2 or the area or the contact races during some part of the stroke. On make combinations, large d<Xll8-shaped or convex contacts shall not be. out o.f aligment (gauged visually) by more than l/S o! their .face diameter and in their operated position shall make contact at approximately the center of their faces. AUTOMATIC ELECTRIC COMPANY CHICAGO, U.S. A. 0 ""'· , .. ""· let------~,------~,------~----_.. ____......, PAGE 3 OF 10 TCI Library www.telephonecollectors.info 9. Qt spring combinations where a spherical contact mates with a disk type contact, the centers of the contacts shall not be out of alignment by more than l/3 the diameter of the disk contact. Armature 1. The relay armature shall be set so as not to make contact with the heel piece (air line), but to clear the heel piece by not more than .OOJ• for adjustment and .oo4• for inspection at the closest point with the armature operated. The armature shall be parallel tot he heel piece end, as gauged visually. Note: - 2. In case or short lever, ales-release relays, the maximum air line may be .005" for adjustment and .oo&t for inspection at the closest point with the armature operated. The relay armature shall not bind at its bearings or on the heel piece and shall have side play of not less than or more than .020•. .002• 3. The armature back stop shall be adjusted to allcs minimum .ooS-, m&xilftUDI .012•, play in the armature between the /12 spring &nd the armature back stop on spring pile-ups where the Ill spring is a break spring. This may be judged visually. 4. The •z• relay armature back stop shall be positioned so tbe point of contact between 1ibe armature and the formed edge of the back stop is not less than 1/)2• !ran the end of the armature arm. 5. The armature bushing shall be securely assembled on its associated mounting. assembly shall be considered satisf'actoey i t the bushing is -Note: This forced onto the mounting lug with a minimum pressure of 20 lbs. while the bushing is at a temperature of' approximately 200° F. D. Residuals 1. Relays which are equipped with adjustable residuals shall be adjusted as specified on the Relay Adjustment Sheets. This is an adjustment of the space between the core and armature with the relay electrically operated. 2. Where the residual specified on the Relay Adjustment Sheet 1e .003• or more, a tolerance not to exceed plus or minus .001• for Adjustment and .002• for Inspection shall be allOll'ed except as follOll's: (a) Where the residual specified for a short lever armature relay is .ooJ•, a tolerance not to exceed plus .001• or minus .0019' shall be allcsed for Adjustment or Inspection, unless otherwise specified. ). Where the residual is specified as .0015•, the armature shall not touch the core, or be more than .003• for Adjustment and .004• for Inspection, from the core at the closest point, with the armature operated electrically. E. Springs 1. Relays shall be gauged between the armature (or residual when used) and AUTOMATIC ELECTRIC COMPANY CHICAGO, U. S. A. • DR. 0 ICHK. ~1-----....------..-------i~------------~ < PAGE OF 10 A-110 I I 4 TCI Library www.telephonecollectors.info the core. as specified on the Relay Adjustment Sheet. with the armature operated electrically accordinc to F-1 (a) or F-1 (b). Make or break contacts should just make or break with the gauge or the value called for inserted between the armature (or residual when used) and the core with the armature electrically operated. With the tolerances noted below for Inspection or Adjustment. the associated make contacts shall not make with the plus tolerances and shall make with the minus; and the associated break contacts shall not break with the plus tolerances and shall break with the minus tolerances. 2. For Adjustment. a variation. fran the values specified. of plus or minus .001• in the case of standard armatures, or .002• in the case or short lever armatures shall be allowed. except as shown under Section 3 below. 3. Upon Inspection. a variation. !ran the values speci.f'ied. of plus or minus .002• in the case of standard armatures, or .003• in the case of short lever armatures shall be allowed. except as follows: (a) When a make or break contact is specified as .003• • or less. the variation allOll'ed for Adjustment shall be plus .001• or minus -0- and tor Inspection the variation shall be plus .002• or minus -o-. (b) When a make or break contact is speci.f'ied as .oo4• • the variation allOll'ed for Adjustment shall be plus .001• or minus .001• and for Inspection the variation strlll be plus .uu2• or minus .001•. ( c) On make-before-break c anbinations where the c:ti.f'ference between the values apeci.f'ied tor the make and break adjustment is as indicated in the following table. the variation allowed for Inspection or Adjustment as determined by F2, EJ (a) or E3 (b) • shall not cause the break contacts to break when a gauge is used which is the indicated amount smaller than the gauge on which the •ke contacts actually make: Difterence between Dake and break specified Break contacts shall not break with follOll'ing size gauge smaller than gauge on which nake contact actually makes. For Inspection For Adjustment .001• .002• .oos- STAtmARD .002• .002• .003• .004" .ooa- .oo6• .003• .003• .004• .005• .oo6• .001• .003• and .004• for •c• Relays .OQJ• .004• .006• ARMATURES •• 007" .009• .010" SHORT LEVER .ou• ARMATURES .012• .oosw .007• .007• .ooa• .009• .ooa• .ooa• .009" .010- These tolerances shall be checked •1th gauges which vary in steps ot .001•. AUTOMATIC ELECTRIC COMPANY cH1CAoo. u. s. A. cil----.---...---+u~K,.....~..'~ "'""~·~-t ~ I I PAGE s ~ 10 A-no \ TCI Library www.telephonecollectors.info (d) ( e) Where a stroke measurement is specified. the variation &llCJW'ed for Inspection shall be as f'oll01r1: l. A gauge .003• in the case ot a at.andal"d armature and .009' in the case of' a short lever armature larger than the specified stroke gauging should not enter between the armature (or re•id.al. when used) and the core when the relay is not energized. or if it does enter the armature shall not leave the armature back stop when the relay is electrically energized. 2. When the difference between the w.lue11 specified f'or stroke gauging and the highest make contact gauging is .009' or more. the armature shall leave the back stop .when a thickness gauge of' .002• less than the values specified tar the stroke is inserted between the armature (or residual when used) and the core. )• Whan the difference between the values sp.ecitied for the stri>ke gauging and the b1ghe1t make contact gauging is .oo4• or le1m. the armature shall leave the back stop when a thickness gauge ot .002• !lore than the value on which the make coutact actually makes. {gauged within .001•). is inserted between. the ara'lture (or residual when used) and the core. When there are two or more back contacts in a •prina pile-up• the variation allOll'ed shall not change the sequence of OJM~tion. as indicated by the specified mechanical gauging. Note: - 4. The above requirement does not apply to the back contacts of the standard make-before-break combinations as illustrated.by springs #2 and #3 ot Fig. 7. (.t) When the gauging •pecitied tor a make contact combiaation i• .oo4• • or more, greater than any other make contact gauging value tor the same relay. no variation shall be allowed that will alter the sequence of operation indicated by the .oo4• or more difference. (g) When the difference between the values specified for the break-and make springs ot a break-111&ke combination is .002• or less. the make springs shall not make when a gauge is used which is .002• less !or Adjustment or .001• less for Inspection. than that on which the break cOft.tacts actually break. When the difference between the values specified tor the break and make springs of a break-make combination is .003• or more, the make springs shall not make when a gauge is ut1ed which is .002• less than that on which the break contacts actually break. When the gauging or separate electrical requirement11 indicate that one or more pairs of col\tacts shall make or break before the next succeeding pair of contacts break.they shall be adjusted as follaws1 (a) When the gauging difference between the pairs of contacts is .006• or more. the make or break contacts shall make or break before tbe bushing on the armature spring of the succeeding pair or break contacts is struck by the precedi~ armature spring. AUTOMATIC ELECTRIC COMPANY CHICAGO, u. s. A. ~ ....- -.....- - - . . - - -.....llllllurc .... .• """"",_...,1"'_"11\.--.. c I I PAGE b OF 10 TCI Library www.telephonecollectors.info A-110 (b) When the gauging ditterence between the pairs of contacts is .005" or less, the make or break contacts may or may not make or break before the bushing on the armature spring of the succeeding pair or break contacts ia atruck b,y the preceding &r11&ture spring, but th8" make or break contact muat make or break before the succeeding break contacts break. 5. Variation in the mechanical gauging shall not 'be permitted which will allOll' the normal or operated contact gap to be leaa than .ooS- as gauged by eye. 6. Relays shall f'u~ operate all springs and the armature {or residual when used) shall touch the core on the •Operate" teats ahosn on the Relay Adjustment Sheet. 7. Relays ai.11 not open any back contact circuits nor close any make contact circuits on the •non-operate• test. ahosn on the Relay Adjustment Sheets except as f'oll01ra1 (a) On relays having three or more back contacts the first two back contact combinations in the sequency of' operation, as indicated by the specified mechanical gauging,, may break contact on the •non-operate• tests ahosn on the Re1s1' Adjustment Sheeta. NOTE& B. The above requirements does not apply to the back contacts of' the standard make-betore-break canbinations as illustrated by springs #2 and //) .i Fig. 7. HOlrever, ~ abon requirement applies to the back contacts of' the 11pecial make-betorebreak combinations as illustrated by springs 11 and 12 of' Fig. B. The above requirements applies only to a aeries o$ break contacts which halve a normal sequence of' .001• or .002• between naninal break gauging nluea on a l q lever armature relay or .002• or leaa between n<l'llinal break gauging values on a short lever armature rel~. (b) On special make-betore-break combinations as illustrated by Fig. 8, the make contacts may make on the non-operate requirements specified tor the entire spring assembly. (c) On two step rel.aye, the contacts to which the separate electrical requirements apply ma7 make or break on the •non-operate• requirel18nts specified f'or the entire spring assembly. Spring tension sbaU be accurate~ adjusted in accordance with the •Readjust• values (current or resistance) and inspected in accordance with the •Teat• values (current or resistance) shOll'n on the Relay Adjustment Sheets. 9. A variation o! plus ar minus one volt shall be allcsed in the Toltage specified f'or adjus'\ing and inspecting the rel.aye according to the •Readjust• and •Test• resistance values. 10. (a) Horisontal relay armature damper springs shall be tensioned against the armature butter with 120 grams maximum, SO grams minimum. The armature back stops shall be adjueted to allcs .005" minimua• I"""" 01----.----.---+---. . .- - - t A-llO 7 t: I I UK. AUTOMATIC ELECTRIC COMPANY CHICAGO, u. s. A. c PAGE TCI Library www.telephonecollectors.info OF 10 .012• maximum. (judged visually) between the Ill spring (armature damper spring) and the bushing ot the 113 spring where tbe #2 spring is a break spring. ll. F. •z• (b) relay armature damper springs shall be tensioned agaiD8t the armature arm with 120 grams •xilnum. 50 grams minimua. (a) Horizontal relay armature bearing pin damper spring• e1-ll be tensioned against the armature bearing pin with a teneion of 1000 grams maxi.mum, 6oo grame minimum. (b) relay armature bearing pin damper springs eball be tensioned against the armature bea~ing pin with a tension ot llinimum 350 grams. •z• saturation 1. Relays shall be saturated at a llinimum of 300-&mpere turns for a llinimua interval of one second betore being adjusted or checked to the electrical current flOllr requirements. The saturating current shall be in the same direction as the other current .flOllr requirements. The other current tlOllr requirements shall not be applied until a minimum interval or 1 •econd after saturation. (a) When adjusting and testing on 46 volts. this requirement •Y be met by applying the voltage to the operating winding as follmaa Windings ot a 100-ohm resistance or more, connect directly to 46 volts t 1 volt. Windings of less than 100 ohms resistance, comect to 46 volts l volt with a protectiTe :resistance of approxiJaately 45 ohlla (or switch magnets) in series. * (b) When adjusting and testing on 24 volts, this requirement may be met by applying the voltage to the operating winding as follows1 Windings of 25 ohms resistance or more. connect directly to 24 volts l volt. Windings of less than 25 ohms resistance connect to 24 volts t 1 volt with a protective resistance of approximately 12 ohms (or switch magnets) in series. * G. Locking Type Relays 1. With the armature at nQl"ll&l, t be pressure of the locking spring against the armature shall be 75 graas minimum to 150 graae maximum for adjustment and 50 grams minimumto 200 grams maximum for inspection. , 2. The locking spring si.U latch tbe armature when the armature is •nuall7 operated with a .0015" gauge between the core and the armature (or residual when used)• and shall not latch the armature without binding when the armature is manually operated with a .003• gauge between 1he core and armature ( ot- residual'lrhen used). J. The tongue or the locking spriqg stall engage the anaature to a depth at least equal to the thickness or t.he tongue. H. stroke Adjustment ot 3-Pole Re1-7s, With Stroke Adjusting l. Screw The front pole-piece shall be located so as to be approximateq flub with the edge of the center pole-piece as gauged visually. AUTOMATIC ELECTRIC COMPANY CHICAGO, u. s. A. . 1~"~ a._ _________-li!OR. _ _ _tl!!!-._--t ' I I PAGE 8 OF 10 TCI Library www.telephonecollectors.info A-ll.O 2. The armature travel is adjusted with the aid of the screw and lock nut located in the front pole-piece. When the armature travel has been set the pQsition of the screw shall be secured by tightening the lock nut. The end of the screw shall ex.tend a minimum .030" beyond the inside surface of the front pole-piece. !fill!.: In case of large annature travels, it may be necessary in order to meet the above .030" requirement, to reset the front polepiece further toward the armature end of the relay. J - LUBRICATION: 1. When ever a horizontal relay has a heavy duty armature bearing or is to be operated as much aa one million times per year, it is recanmended that the armature bearings be lubricated with a #4 Artist•s Sable Rigger brush which has been dipped 3/8" into spindle oil (Spec. 5231) and wiped on the edge of the container to remove the surplus oil. There should not be sufficient oil adhering to the brush to form a drop on the end of the bristles. Six relays may be oiled with one such "dip". !QI!: Heavy duty armatures can be recognized by the following features: Heavy duty standard ratio amatures have a heavy cast yoke instead of the standard formed yoke. Heavy duty short lever armatures have 6-40 phosphor bronze residual screws instead of the standard 4-36 brass screws, and are chromium plated. 2. During manufacture all relays with heavy duty armature bearings shal1 be oiled, other relays shall be oiled only when the adjustment sh8'9ts or cards carry a note, "Oil Bearings". JVB:ss AUTOMATIC ELECTRIC COMPANY CHICAGO. u. s. A. ci ~ < I """· ....----....I ------------. . . 1------... I PAGE 9 OF 10 ..... TCI Library www.telephonecollectors.info ------~ A-110 --'"--SEE NOTE 2 SEE NOTE 1 CORE RESIDUAL SCREW RESIDUAL SCREW Fl~. FIQ. 1 2 PROCEOURE FOR CHECKING RESIDUAL GAP NOTE-1 ARMATURE STOP ~-LEVER SPRIN~ NOTE-2 RESIDUAL SCREW .. _,__N0.147"8 ARMATURE ADJUSTER ADJ USTl~G THE ARMATURE FIG. 3 LEVER PROCEDURE FOR CHECKIN~ ARMATURE STROKE ANO SPRIN~ ~AU~IN~. IF RLY MAS.OOtS"RESIOUAL {OR MORE.) OF EITHE.R ADJUSTABLE OR Fl'IC.E.D TYPE WITH DIA. CONSIDERABLY SMALLER THAN THE. CORE. EXTEND ~AU<iE ONLY PAST ED~E OF RESt DUAL SCREW OR DISK. IF RLY HAS ZERO RESIDUAL. OR RESIDUAL CAPO~ Fl~ED ~ESIOUAL NOT APPRECIA&.Y SMALLEi:l IN DIA. THAN THE CORE, COVER ENO OF C.ORE WITH ~AU~E. v.:=~(ID ~ Fl~. 5 PILEUP CLAMPIN~ PLATES & INSULATORS AOJUSTIN~ SPRINGS TO MEET GAU~(N~ REQUIREMENTS NOTE-3 ~0.70"" SW!iHT AN~LC. SPRIN~ ADJUSTER MAY ~LSO 8E USED FOR Fl<=!S. 51'<0. LEVER SPRIN~ ARMATURE BUSHIH~ N0.147<o9 ARMATURE_~__....._, STOP ADJUSTER Fl~. 4 Fl~.o ADJUSTIN~ LEVER SPRINCiS FOR TENSIOtJ ADJUSTMENT~ ARMATURE. &ACK STOP Fl!;i .7 STANDAP.O MAKE Flq.8 SPECIAL MAKE BEFO~E BREAK ASSEMBLY &EFORE BREAK ASSEMBLY ~ PR. G.EL. < > GMK _ _ _ _ JNOEX.E.O _ __ 0 R K .w.~ -------~ t<u: ENt;. 0.K. L .M.W. 1 AUTOMATIC ELECTRICCOMPANY CHICA~o.u.s.A. STANDARD ADJUSTMENT FOR HORIZONTAL RELAYS AND TYPE 28 '"z '' RELAYS PAGE 10 TCI Library www.telephonecollectors.info A· 110 ,ISSUE NO. I ~~·;, STANDARD ADJUSTMENT FOR HORIZONTAL RELAYS, THRBE-POLE RELAYS, SHORT LEVER ARMATURE IELAYS, la C0-33-A-llC AND EMG. ECO 4-2-59 TYP.E /128 nzn RELAYS ' CHANGED SHEET 8, SEC.F-1-a. Av1fi1flS 111~/~'i 1<.ic. ,-··· . '+·13-st.::.t ISSUE: 133 INTR:>DUCTIC!l The horizontal, Type #28 "Z" and short lever armature relays consist ot the tollowin~ parts: coil assembly, heel piece, armature assembly, and aprin1 assembly or assemblies. The thre.,-pole relay has two or more windings 1n 2 sections with a third magnetic pole located betv1een the two sections and extending around to the front of the armature. Definitions: Various terms used in the requirements tllroushout this standard adjustment will have the following meaning: "Contact Springs" are the individual springs of a spring combination. 11 Spring Combination" is a spring group actuated by a single armature or lever spring. "Spring Pile-Up" is an a!Jsembly of all the springs operated by cne armature &l'ill. "Spring Assembly" consists ot all of the spring combinations on one relq. -~- 11 Two-Step Operation Relays" are relays having sepal"ate electrical requirements · for one or more pairs of contact sprines.. ()l the horizontal and Type #28 11 z11 relays, the lever ratio between residual screw and armature bufhr i• about 2.'25 to 1, and on the short lever armature. relays this ratio is abclUt 1 to 1. The assembly screws are tightened after the insulatera have been h.eated a.11.d while the pile-