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Nov. 26, 1946- e. DE'AKIN ET AL 2941 1,526 IMPULSE STORING AND REPEATING DEVICE Filed March 31, 1945 3 Sheets—$heet 1 _ Ml TI L WkGmEkV I M A INVENTORS GERALD 53 EAKZ N ERNEST S. McLARN Nov. 26, 194$. G. DEAKIN ET AL Z?E-ELSZG IMPULSE STORING AND REEEATING DEVICE _ Filed March 51; 1945 5’ Sheets~$heet 2 F555;. 5. ZNVENTORS GERALD DEAE’UN EQNEST S. McLAFE? NW, 269 1946“ G. DEAKRN ET AL ' 2,433,526 IMPULSE STORING AND REPEATING DEVICE Filed March 31, 1945 3 Sheets-Sheet 5 my. 4140 25 INVENTORS GERALD DEAKIN 2“ BV ERNEST S.M<:LARN ATTY. Patented Nov. 26, 1943 14119526! UNITED STATES PATENT OFFICE 2,411,526 IMPULSE STORING AND REPEATIN G DEVICE Gerald Deakin, New York, and Ernest S. McLarn, Manhasset, N. Y., assignors to International Standard Electric Corporation, New York, N. Y., a corporation of Delaware Application March 31, 1945, Serial No. 586,005 1 9 Claims. (01. 179-16) This invention relates to dial impulse storing and repeating devices designed for employment in telecommunications systems such as in automatic or semi-automatic telephone exchange systems and the like. An object of the present invention is to make provision for receiving electrical im 5 pulses, to store the impulses received and, de pendent on circuit conditions, to later or simul taneously therewith, retransmit or repeat the received impulses in properly timed relation to receiving apparatus such as the register Of an automatic exchange. As illustrative of .a typical use of the present apparatus it may be employed in association with an incoming trunk to a register of an automatic 2 fully understood by reference to the accompany ing drawings wherein like reference characters are applied to the corresponding parts in the several views. In the drawings, Fig. l is a view of the improved impulse stor ing and repeating device showing same in side elevation with the cover shown in section; Fig. 2 is a schematic View showing the circuit arrangement; Fig. 3 is an end elevation taken from the left of Fig. 1 with the cover member shown in sec tion; Fig. 4.- is a vertical cross sectional view taken exchange of the multi-potential selection type 15 on line 4—4 of Fig. 1; from a Strowger oilice not provided with a reg ister or other means of storing the call pend ing the picking up of the register. An example of such use is disclosed in co-pending application Serial No. 484,184, ?led April 23, 1943, now Pat ent No. 2,380,950, dated Aug. 7, 1945. In astraight Strowger exchange, as is well understood, no Fig. 5 is a partial view in end elevation cor responding to Fig. 3 with the parts thereof in changed or “leading” position; Fig. 6 is a detailed vertical longitudinal sec 20 tional view of the armature mounting; Fig. '7 is a vertical cross sectional view taken on line 'l-—'! of Fig. 1; Fig. 8 is a skeletonized plan view of the mov means is provided for storing of the digit impulses ing parts of the mechanism; and for the short interval of time required to pick up the trunk register. Moreover, in the transmis 25 Fig. 9 is a partial view in side elevation of the follower magnet armature and associated ratchet sion of the dialling impulses from the Strowger feed and contact under the condition of magnet o?iice, particularly when working under maximum energization. tra?ic conditions, the dialling of a low digit, such The improved apparatus and associated circuit as 1, may occur in such rapid succession as to 30 arrangement of the invention, designed for the be short of the time requirement for the selec_ storing and repeating of received impulses, em tion at the receiving exchange such as when ploys in its operation a stepping mechanism em all but the last few trunks in the selected level ploying two driven parts which by inter-engage of a group selector are busy. Under the ?rst mentioned conditions wherein there is no ade 35 ment open and close contacts for preparing an impulse repeating or re-transmitting circuit. One quate time interval available for register selec of the driven parts is stepped or advanced by a tion it is necessary that the ?rst digit trunked magnet responsive to the incoming or received into an automatic o?ice from a Strowger oil'ice impulses. The other of the driven members is be stored in the trunk itself and further that a full inter-digital time period be provided for reg 40 stepped by a magnet under the control of inter rupter contacts after the preparation of its ener ister selection. The device of the present inven gizing circuit by the leading or advanced rela tion is designed for the storing and the repeating tion of the ?rst driven member with relation to of the impulses under the prescribed conditions that of the second and cooperating driven mem in a manner to effect the proper operation of ber. the related receiving device or register. The im 45 In the preferred structural embodiment of the proved device, to be so operative, consists of two device illustrated in the drawings the impulse driven parts, one of which advances in position storing and repeating mechanism includes driven with relation to the other responsive to the num members in the form of similar rctatably support ber of impulses received and wherein the other of the driven parts is caused to have a following 50 ed ratchets rotated by magnet-controlled pivoted armatures carrying feed pawls engaging with the movement during which the impulses are re peated until it reaches the advanced position of ratchet teeth to e?fect step-by-step rotation there the ?rst part by inter-engagement therebetween. of. The mechanism as shown is supported upon a base or standard I having integrally formed The foregoing and other features and advan tages of the present improvements will be more 55 therewith, a rear wall 2, a centrally positioned vertical supporting wall 3 and forwardly and op 2,411,526 associated with the follower ratchet ‘l’ the mecha nism further includes switch elements operated positely positioned brackets ii. Within apertures in the brackets A a transverse bearing shaft 5 is journaled upon which are freely rotatably mounted two ratchet wheels 6 and l, of corre by the return spring 35, which is insulatingly supported and carries contact element engaging contact elements carried by coacting resilient and insulatingly supported springs 36 and 39. It will be understood that spring 35, in normal sponding diameter and provided with similar ratchet teeth 8. The ratchet wheel 6, which is the received impulse operated or lead ratchet, position as shown in Fig. 1, causes engagement is provided with a hub a formed with axially ex of the contact element carried thereon with the tending keys or splines it upon which is slidably coacting contact element carried on the leaf mounted a switch actuating collar it having a 10 spring 33, thus a circuit including the springs radial ?ange l2 provided on one face with dia 35 and 32; is normally completed a circuit metrically positioned laterally extending earn lugs including springs’ 35 and 39 is normally incomv l3. These lugs l3 project toward and coopera pleted. Spring 35%. it will be noted in Fig. l, is tively engage with coacting earn lugs ili-lil car retained in ?xed position by a stop it. As shown 15 ried upon a face of the ratchet wheel 3’. Relative in Fig. '7, the return spring 35. contact springs rotation of the ratchet and inter-engagement of 38 and 35 and associated insulating washers are the lugs will accordingly effect shifting of the supported in position upon the bridge 36 by a collar ii, thereby effecting the opening of con yoke 48 secured by a single screw stud iii. A tacts in the impulse repeating circuit, as will now cover 42 is provided as shown for the protection be described. These contacts is and it are car 20 ried upon ?at spring elements, supported by bolt of the operating mechanism. An operating circuit including the hereinabove I'I upon a bridge is in insulated relation, and described device is shown diagrammatically by each is provided with a terminal extension 59 as way of example in Fig. 2 wherein the coil 2'! of shown in Fig. 1. As shown in Fig. 5, when the the lead ratchet operating magnet is connected cam lugs i3 and the coacting cam lugs it are dis 25 through terminal at to trunk 535 of a Strowger engaged whereby the collar H is shifted toward the ratchet wheel ‘l, the contacts l“—i5 engage for closed circuit as the spring element iii presses exchange and to the negative battery terminal 46. The lead ratchet wheel 6 is accordingly ro tated stepwise in response to the impulses re at its lower end against the ?ange E2 of the ac ceived from this independent circuit. The fol~ tuating collar H. Engagement of the cams 30 lower ratchet operating magnet 28 for creating l3-Hl causes axial shifting of the collar ii to impulses in the repeating circuit is controlled by open the contacts as shown in Fig. 3. In the the switch elements l5—-it and additionally by structural embodiment as shown (dotted lines in a switch 59 which will be understood to be closed Fig. 1) each of the spring elements carrying the in any known manner as soon as the register is contacts l5 and It is forked to provide legs strad“ connected. The circuit for magnet 28 extends dling the collar H, and the extremities of these over lead E? from the positive battery terminal elements are formed as shown by laterally bend is, the switch elements it and it, lead 49, ter ing same toward the flange to provide oilset en minal Sit, lead 5i, switch 59, terminal 511., the gaging portions 29, each having a rounded sur leaf spring switch elements 35, 3‘3, magnet 28, face pressing against the ?ange 92 to cause axial 40 lead 55 to the negative terminal 135. The impulse shifting of the collar H as above stated. repeating circuit extends over a stepping relay A uni-directional step-by-step rotation of each 60 in the register, lead 58, terminal 5?, the leaf of the ratchets 6 and 'l is provided by similar spring switch elements 39, 35, terminal 54, switch magnetically operated feed pawls 2i coacting elements 59, H5, i5 to the positive battery ter with the ratchet teeth. The customarily em~ minal. Accordingly, the operation of the fol~ ployed cooperating retaining springs 22 engag lower ratchet controlling magnet 28 is dependent ing with the ratchet teeth, are supported upon ?rst upon the closing oi the control switch ele: the bridge member is and retain the ratchets ments its-46 and on completion of the circuit in the successive positions, opposing reverse over the switch 59, and it continues to step until movement thereof. The feed pawls 2 i, pivotally the switch elements 55-4 5 are opened by engage supported at 23 upon extensions "24 of armatures ment of a lug it on the ratchet l with 2. lug l3 25, are independently operable by means com of the ?ange i2 rotated by the ratchet 6. ‘ prising a magnet structure including the coils The operation of the device above-described 21 and 28 having the usual cores 2%. The arma tures 25 are pivoted at 26 upon brackets to which, as is best shown in Fig. 6, are secured in position by screw 3! to permit armature-magnet air gap. The magnetic ratchet rotating mechanism above described will be understood to be or’ correspond is as follows: the cam lugs l3 and iii are in en~ gaged relationship accordingly switch elements l5 and it are not in contact and accordingly no current flows from the battery through magnet coil 23. As impulses are transmitted in ‘the trunk lines, circuit normally is completed from ing construction for each of the ratchets E and 60 the trunk with the register and switch 75%’ is ac 'i and each further includes adjustable stops 32, engaging theunder sides of the feed pawls to limit the‘ downward movement thereof, ?at springs 33, supported upon the arms 2:’: and en gaging rearward extensions as of the pawls, re siliently to urge the latter into contact with the ratchet teeth and return or feed springs to, sup ported upon a bridge 38 and engaging lugs 3‘? of ‘the armature extensions 26 to effect downward or feed movement of the pawls and rotation of the ratchet wheels upon each release of the armature. Insofar as now described, the two cordingly closed, but should circuit not be com pleted from the trunk with the register, switch 59 is moved to open circuit position. 'The ii.--~ pulses from the trunk, meanwhile, have. caused stepwise rotation of the lead ratchet E by energiQ zation of the magnet coil 2‘? which is connected across the trunk terminals ‘M and lit, andlas this ratchet is rotated the engaging lugs l3 and it are disengaged ‘thereby permitting the spring pressing member 15 to shift the collar liaxially causing closing of the switch elements i?3—.l5. When this occurs and if circuit is completed be magnetic ratchet feed devices operated by the tween the trunk and ‘the register, the magnet two magnets are similar structures but in the coil 23 is then connected through closed switch 75 case of the magnet element including coil 28 2,411,526 59 in closed circuit with the battery, thereby re comprising lead and follower ratchet driven ceiving an impulse which results in stepwise ro tation of the follower ratchet 1, engagement of members rotatably journalled and formed and supported for shifting engagement to establish the cam lugs i 3—| 4 and opening of the switch a coacting position, a ?rst magnet having a the magnet coil 23, as it causes operation of the cl spring pressed armature provided with a feed pawl positioned to advance the lead member re corresponding armature results in momentary sponsive to received impulses, a second magnet elements l5—|6. Each impulse thus received by the contact leaf springs between35the and contact 39 whereby elements correspond carried 1g positioned to advance the follower member, an energizing circuit for the second magnet includ ing a control switch adapted to be opened in the engaged position of the driven members and relay impulse of currents the register are causing transmitted it to to select the stepp the cor~ responding line. been connected to the register, switch open circuit position, hence the transmission of digit selecting operating impulses to the stepping relay is postponed until such connection is estab 15 be closed over said control switch and over fur lished, but when this occurs magnet coil 23 is ther contacts controlled by said second magnet. 6. An impulse storing and repeating device energized and the mechanism transmits the im pulses as above-described. What is claimed is: 1. An impulse storing and repeating device 20 comprising lead and follower driven member supported and formed for inter-engagement to establish a coasting position, a ?rst magnet to advance the lead member responsive to received impulses, a second magnet to advance the fol lower member, an energizing circuit for the sec ond magnet including a control switch adapted to be opened in the engaging position of the driven members and closed when the lead mem ber is in advanced relation with respect to the follower member and interrupter contacts ar ranged to be actuated by said second magnet. 2. An impulse storing and repeating device comprising lead and follower driven members 35 supported and formed for inter-engagement to establish a coacting position, a ?rst magnet to ergization of said second magnet. 7. An impulse storing and repeating 40 actuated by said second magnet. 3. An impulse storing and repeating device com prising lead and follower driven members sup ported and formed for inter-engagement to estab lish a coacting position, a ?rst magnet connected 5 and closed when the lead member is in advanced relation with respect to the follower and repeating contacts closed re sponsive to each actuation of said second mag net. ' 4. An impulse storing and repeating device follower ratchet driven control switch having a movable contact engaged by the collar to tiomng of the driven ratchets and . second magnet and an impulse repeating circuit connected to be closed responsive to deenergizing of said second 9. An impulse storing and repeating device 75 comprising lead and follower driven members ro~ 9,41 1,528 8 bers and closed on advanced positioning of the tatably supported and formed for inter-engage lead member, means for intermittently energiz ment to establish a coacting position, a ?rst mag» ing said second magnet, an impulse repeating cir net operative to advance the load member step cuit and contacts for closing the repeating circuit by step responsive to received impulses, a second 5 responsive to opening of said energizing circuit. magnet operative to advance the follower mem ber, an energizing circuit for the latter magnet including a control switch adapted to be opened in the coacting positioning of the driven mem GERALD DEAKIN. ERNEST S1. MCLARN.