US1478419A - Machine-switching telephone-exchange system - Google Patents

Description

@een 25 i923.

R. S BAILEY MACHINE swITcHING TELEPHONE EXCHANGE SYSTEM Filed Feb. 2C, 1920 2 Sheets-Sht www.

@and 5. @ai/ey Dec. 25, 1923. A www@ R. S. BAILEY MACHINE SWITGHING TELEPHONE EXCHANGE SYSTEM Filed Feb. 20, 1920 2 Sheets-Sheet 2 Ffa/7d 5. 50i/ey.

. faire` r OFMONTCLAIB, NEW JERSEY, ASSIGNOB TO ERICAN TEL or" A. CORPORATION OF N YORK.

Panarea nec. as. rea.

l maaar D S. BAILEY;

'.AND-TELEGBIAPH COMPANY,

u: ons

l E-SWITCHING TELEPHONE-EXCHANGE SYSTEM.

" application med rebmary ao, 1920. serial na. asomaV To all whomz't may concern.'

Beit known that I, RAND S. BAlLEY, residing at Montclair, in the county of Essex@ and citate of New Jersey, have invented certain Improvements in Machine-Switching Telephone-Exchange Systems, of which the following is a specification. Y

This invention relates to machine switching telephone exchange systems.

A feature of the inventlon is the provision of an improved and simplied impulse sender of the type in which the desired number is first set up by a plurality of setting members, said setting members being then r'eleased to send out a set of series of impulses in accordance with the number set up. In accordance with this -feature of the invention, a'plurality of longitudinally movable members are arranged adjacent to each other, and are adapted to be manually independently set to a predetermined position depending on the number that it is desired to set up. Operation of a key connects the impulse sender to a cord or trunk circuit and causes the members to be successively released so as to send out impulses in accordancewith the number set up on the sender. After the members are returned to normal position the impulse sender is automaticallyl disconnected from the cord or trunk circuit. A further feature in a'sender of this type is the provision of means whereby, after a number has been setup and the sender associated with the cord or trunk circuit, the movable members of the sender may beindependently reset to change such number without sending false impulses over the oonnected circuit.

. A still further feature is the provision of means controlled bythe operator, for transferring the sender after the number has been set up from a connecting circuit with which it has been connected to another connecting circuit. v

In the drawings an impulse sender is represented in connection with acord circuit at a manual operators position in which the operator may control the setting of selectorv switches -.(not shown) at an automatic exchange, only Vas much being shown of the circuit arrangement as is necessary for an understanding of the invention. lt will be l apparent however that the impulse sender forming the Subj ect matter of this 'invention may readily be adapted tor use in systems o 2 represents a sectional widely varying character such as electric signalmg systems, etc.

Fig. 1 is a partial view of the impulse sender with parts broken to show a portion of the interior mechanism of the device; Fig. view along the line 2--2 of Fig. l, Fig. 3 shows a sectional view along the line 3-3 of Fig. 1, and Fig. 4 represents diagrammatically the connections of the calling device when used in connectioii with a cord circuit.

Similar letters of reference are used to dei l ignate `the same parts wherever shown the drawings. I

The impulse sender as shown in Figs. Lto

3, comprises fourlongitudinally movable members arranged adjacent to each other. These members are independently movable to and from their normal position. Three of the members are shown in their normal position while the top. member is shown moved to a osition such that on its return to normal t ree actuations of the pulsing contacts associated therewith would occur. Each member comprises a slidable member 12 havin -a 'pair of shoes on each end such as 13 an 14 adapted to ride in a supporting member 15. The su porting mem l suitably secured to -shaped' straps 2 which are screwed to an operators keyboard 3.y A casing 4 screwed to the sender from injury and dust. A mask 6,

berslare 'i sa l straps `2 protects the a partial view of which is shown, is screwed to the keyboard 3, and covers the movable members when in their oH-normal position. Rigidlefixed to the slidable member 12 is a num r plate 10 having the numbers 1 to 9, inclusive, and 0 appearing thereon at suitable intervals apart. Above the, number' plate 10, and fixed thereto is a fin er hold plate 11. Rigidly fixed to each num r plate 12 is a toothed member 19, the teeth on the member being placed the same distance a art as the numerals on the number plate. he teeth of member 19 cooperate with a pair of pulsing springs 16 individual thereto to interrupt a circuit rupon the return to normal of the movable 'memben The pulsing springs 16 are suitably mounted upon the supporting member 15.

Associated with the longitudinally movable members and individual. thereto are cunter' weighted dogs' 18 which are :mtatably mounted upon a shaft 32 secured to a support 30. The left-hand portion oiz tbm@ ses llt@

engage notches such as 17 in the upper unr portion of member 12 and serve to hold the longitudinally movable members in a set position until released by the operator.

There are also levers 33 individual to each longitudinally movable member which are rotatably secured to a shaft 31 fixed to the support 30. Each lever 33 is` provided with an arm 45 which is adapted to engage a tripping nger on the number plate 10. When a movable member 12 returns to normal position, engagement of the tripping finger 80 with the arm 45 rotates the lever 33 about its axis thereby causing arm 34 of said lever to engage a pin 35 fixed to the dog 18 associated with the next movable member, thus rotating and causing the re# lease of said movable member.

Associated with each movable member 12 is an adjusting key 20 by means of which a number may be reset. Operation of the key causes a pair of contacts 21 to be operated to short circuit the conductors leading to the pulsing contacts 16 and thus prevent impulses from being-sent and, at the same time, by 'means of a notch 40 in the shank of key 20 and a pin 41 on the lever 33, an arm 421of lever 33 is caused to engage a pin 43 on its associated counter weighted dog 18, thereby rotating the dog out of engagement with the notch 17 of the movablev member 12 and permitting the movable member to return to normal position. A pavvl 60 may be provided for engaging notch 61 in the lower part of the shank of key 20, in order. to hold the key 20 in the depressed position until the movable member reaches normal position, when a pin 62 secured to the arm 23 disengages the paWl and releases the key. The operator can then readjust the sliding member as desired Without sending false impulses over the line. The parts 60, 61 and 62 maybe omitted, however, in which case the operator, `Where a slide has been pulled out too far, may reset this slide by tapping the key 20 to restore the slide step by step to the desired position. This will in some instances be quicker than to restore the slide to its initialposition and again withdraw it, as is necessary when parts 60,61 and 62 are provided.

lIndividual to each movable member is a regulating device for governing the speed of the return to normal. This device is here shown as a dash'pot. A tube 25 is suitably secured. to an angle iron 26 which is in turn suitably secured to supporting member 15. A rod 55 is fastened at one end to the arm 23 of its associated movable member and at the other end to a piston 36 which rides in the tube 25. By means of a set screw 38, the amount of air passing through an aperture 39 in the end of the tube 25 can be adjusted, thereby regulating the return speed of the returning dial.

Otherdetails of the mechanism will more the drawing only one movable member is shown moved from normal position and this member would be for the thousands di lt of the number. In case, for example, it 1s desired to call the number 3 4 5 6, the remaining members would be successively moved to a position in accordance with the digits of the number desired. Appearing then in a vertical row at the right end of the stop would be the number 3 4 5 6. The retractile springs 28, fastened at one end to the arm 23 of the movable member 12 and at the other end to a pin 22 and inclosed in a tube 24, will be prevented from restoring the movable member to normal by the counter weighted dog 18 which will be enaged in a notch 17 in a sliding member 12.

peration of non-locking key 115 shown in Fig. 4 causes energization of magnet 117. Upon energization of magnet 117, armature 70 is attracted, thereby causing the arm 71, which is pivotally ixed thereto by a in 72, to move` the in 35, secured to the og 18, u Wardly. T e dog 18 is thereupon rotated a out its axis and is disengaged from thc notch 17 of the movable member 12, therebj)7 permitting said member to return to normal under the pressure of spring 28. As the movable member returns to normal, three teeth will engage the pulsing contacts 16 which causes three interruptlons of the ciicuit. The pulsing contacts 16 are suitably spaced normally from the first tooth of the movable member so that during the latter part of the travel of the return movement of thc movable member all thc pulsing teeth will have passed the pulsing contacts which creates a time interval necessary to complete the operation of the selective switch in the automatic exchange.

Just prior to the return of the first s lide to normal position, the tripping finger 8O will engage the arm 45 and rotate lever 33 about its axis thereby causing the arm 34 to release the.dog 18 associated with the next movable member. The second movable member will then be returned to normal and in a like manner will engage the pulsing contacts so as to interrupt the circuit four times. ln a like manner the third and fourth members will be returned to normal and impulses will be sent in accordance with the numberset up. It will be noted -that, suitably fastened to the member '12, there is a pin 8 which cooperates with a pair of contacts 50 when the member l2 is in normal position. These contacts yare normally open invasie whereas, when the member-S12 are in a set position the contacts are closed.

Referring to lFig. l of the drawings, a trunk circuit C comprising conductors 105 and 106 may extend from a manual to an automatic exchange. There is provided a cord circuit B for establishin connections between the telephone linel and trunk circuit C.

The operator, a connection is desired between the line A (which may be connected with the cord circuit B in any desired well known manner) and a .subscriber in an automatic exchange (not shown) connection with which must be established by way of the trunk circuit C extending from the manual to automatic en.

change, inserts plug 110 ot the cord circuit B in to jack 111 oi the trunk circuit C.

The longitudinally movable members of Fig. 1 are then set in accordance with the number desired as heretofore described. As soon as any movable member has been moved from its normal position, the contacts 50 individual thereto, are closed. This causes energization of relay 101, which at its front Contact and armature places ground on the conductor 102 which is common to allthe cord circuit-s or a position. rl`he operator then depresses a non-locking 'lrey 115 which closes a circuit for rela 116 over the following path: grounded battery, contacts ot key 115, winding ol relay 116, conductor 102, armature and tront'- contact of relay 101, to ground. Upon energization, relay 116l loclrs up over a circuit including its front contact and right-hand armature, and grounded battery and, at its left-hand armatures interrupts the 'continuity of the talking conductors or the cord circuit and connects the impulse sender to the cord cir-= cuit. V/hen non-locking key 115 was'actuated to energize relay 116, magnet 117 was also energized. Magnet 117 upon energizetion attracts its armature 70, thus releasing the tirst movable member. Upon return of the first movable member to normal position, the remaining members will be successively released and returned to normal in the manner heretofore described.

. ln case it is desired for any reason to de"Y lay the transmission or impulses, the iirst movable member can be prevented `trom releasing when the dialing lzey 115 is op erated by holding the movab e member in place when actuating hey 115. 'lhe member can then be released by subsequent` operation ot lgey 115.- Should it be found desirable to release the slides mechanically instead ot electromagnetically, the releasing magnet 117 can be omitted and a releasing key can be provided to perform the same functionas is electromagnetically performed by magnet 117.

When all movable members have returned.

having been advised that to normal contacts 50 will be opened and thereby causing its deenergization. rlhe locking circuit for relay 116 is thus interrupted at the front Contact and the armature of relay 101, causing deenergization of relayA 116 thereby disconnecting the impulse sender `from lthe cord" circuit and restoring the continuity .of the cord circuit.

By the pTrov1s1on of a master release key 120, means are provided for the transferring of the impulse sender from one cord circuit to another after a number has been set up. @poration of key 120 opens a circuit tor/relay 101 which in turn opens the circuit for relay 116. @peration of hey 115 which is individual to each cord circuit will then connect the impulse sender to that particular cord circuit and release the impulse sending mechanism.

A mechanism capable of sending numbers containing up to four digits has been shown and described. 'lhe invention is not, however, limited to such a construction, as it is evident that units containin the same parts for each digit could be ad ed without introducingundue mechanical complications, thereby producing structures capable of mnding numbers con aiming any number oit digits. 1

What is claimed is 1. ln a telephone system, a connecting circuit, an impulse sender for transmittin a plurality ot series of implulses over said circuit comprising a plura ty ot longitudinally movable members each provided with hnger holds so vthat they may be variably set, manual means for releasing one of the members, and means actuated under control of said member for causing the successive release ot the remaining members;

2. ln a telephone system, an impulse sender comprising a plurality of longitudinally movable members having a normal relationship to eachother and independently movable therefrom, means by which any one of said members may be variably moved trom its normal position, individual springs arranged to return said members to normal position, and contact making devices operated by the movable members.

3. ln a telephone system, an impulse sender comprising a plurality of sliding members each oi which is provided with nger holds, means for variably setting said members independently, a series ol teeth on each member, a set of contacts for each memico ber, means by which said teeth actuate said contact sets upon the return oil a member' to its normal position, individual springs lor returning said members to normal position, and regulating means for governing the Tpeed ot the return to normal of said mem.-

ers.

t? lu a telephone system, an impulse lli@ titl

sender comprising a plurality of manualyl slidable members each of which is indepen ently movable from and back to normal position, individual' springs for returning said members, means by which such return movement Will actuate a set of electrical contacts, and means for consecutively returning said members to normal position.

5. lln a telephone system, a connecting circuit, means for transmitting a plurality of series of impulses over said circuit, said means comprislng a plurality of longitudinally movable contact actuating members adapted to be moved from normal position to a predetermined position representing the impulses desired to be sent, means for locking said members in the set position, a key in said connecting circuit, and circuit connections whereby actuation of' said key associates said impulse transmitting means with said circuit and releases said members to send out impulses. v

6. lin a telephone system, a connecting circuit, an impulse sender comprising a plurality of longitudinally movable members, means for setting said members, means for locking said membersl in their set positions, means whereby any member may be reset Without affecting the remaining members, and means for releasing said members.

7, ln a telephone system, a plurality of connecting circuits, an impulse sender adapted to be set and locked, switching means individual to each connecting circuit for connecting said sender to any of said circuits and for releasing said sender to transmit a set of series ot impulses over said circuit.

8. ln a telephone system, a' plurality of connecting circuits, an impulse sender adapted 'to be set and locked, a relay and a key individual to each of said connecting circuits for associating said sender with any of said circuits and releasing said sender to transmit a pluralityo't series of impulses over said circuit.

9. ln' a telephone system, a pluralit oi connecting circuits, an impulse sender a apted to be set and locked, switching means individual to each connecting circuit, multiple leads `from said sender to each switching means whereby the actuation ci any switching means connects the sender to tbecorre- ,spending connecting circuit and releases the sender to roducea ynumber of `sets of im- A pulses in t l0. lin a telephone system, a plurality oi e said connecting circuit.

integere.

connecting circuits, an impulse sender adapted to be set and locked, means for connectin'g said sender to any of said connecting circuits, means for restoring said sender, means for automatically disconnecting said sender from said connectlng circuit upon the restoration of the sender, and manual means for independently disconnecting said sender from saidconnecting circuit.

11. ln a telephone systerr a plurality of connecting circuits, an impulse sender adapted to be set and locked, means for connecting said sender to any1 of said connecting circuits, and means for` vtransferring said sender from the circuit to which it has been connected to any other of said plurality of connecting circuits, Without releasing the sender.

12. ln a calling device, a plurality of lon-v gitudinally movable members one for each digit place of a number to be called, means for manually moving said members to a posltlon corresponding to the number to be called, means for locking said members, means for releasing one of said members, and automatically .operated means controlled by the first member released for releasing consecutively the other members.

18. .ln a 4calling device, a plurality of longitudinally movable members one for each digit place of a number to be called, means for manually moving said members to a position corresponding to the number to be called means for locking said members, means for releasing one of said members,

automatically operated means controlled byl the iirstV member released for releasing consecutively the other members, and a set of contacts actuated by each member during its release.

la. ln a 'calling device, a plurality of lonvmeans for releasing one of said members, automatically operated 4means controlled by the first member released for releasing consecutively the other members, and means for mit resetting any member Without releasing the remaining members. 4

lin testnnony whereof lliave signed my name to this specilication this 19th day of February, 1920.

llt-AND S. BALEY.

Images