US1284206A - Calling device. - Google Patents

Description

E. W. ADAMS.

CALLING DEVICE.

APPLICATION FILED APR.Z4, ml].

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M Van far r Edgar 34 flaky/775.

f/i i w/ia Affy GALLIQIG DE To all whom it may concern: 7

Be it known that-I; Enema; W. ADAMS, a citizen of the United States,residing at East Orange in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Calling Devices, of which'the'following is a fulh clear, concise, and exact description.

This invention relates to calling-devices of the type employedin directivelyfcon trolled machine switching telephone-systems, and has for its object-the provision of an improved form of- 'callingf'device through the use of which the capacity ofan exchange system may be greatly inf creased. f

In telephone exchange systems, the practice has been to include not more than ten thousand subscribers inflone exchange dis divided into-several trict, the system being such districts, each having a separatejname. The usual telephonedesignation, then, c'on-*' sists of a name and-a four digit n'iunberf;

The advent of the nutomat ictelephone has causedr the exchange name to-he leftout of: the designation and lone'or'more digits=t0"* i'be SllbStltlltGd; withthe result that in large systems it will be necessary touse six or oven seven digits in a telephone number. 'lhis, however, is physiologically-impraetL cal, since it is generally 'admitted' that the layman is only capable 'of remembering and sending numbers of five digits or less; 7 i Another object. of the invcntion,"'then, is to provide a cnllingde'vice by means of which the conventional telephone 'num'ber' may be transmitted, it being an advantage to designate a telephone by a nu-meand "11 number ratheinthan by rt-longer nun'ih'er" I. I :z ti A feature of the invention isthe use, in addition ton dial switeh of any well knuwir type of n number'ofi'keys; 'whiclr'inay 'be' operated before thexlial will modify thetimpnlses sentbythe fennel in such a way. as to extend the call to any given exchange district.

In certain telephone systems, two relays are provided, both responsive to th'e'operw NEWJEitsIiiirI COMPANY, mconrone'rnn, oF-NEw-YoRx, my 4' cone l 1 .I i telephones 'n mentioned train.

switch andwhich tion of the .calli rclay'sfis made" and the othe strong curren vice is 'iiiade'to relays'gw ill introduces '1 the patent granted I gn gitio ud feature tram, ofdimpulses 1.4 itlugujtkany discrimofthesuhseriher, v x I sziine niunher, of iy'ldalled with the ten-posi- )VitlftllG-(lgllhld dial in the ahme it'pp licatidrii "I Y i In the prcfer're 'niho'di ment of the ini t eaccompanying By the netwo of such keys, v of ull'ecled and lis of, "i tniililses may he sent.

tion dial" With fan iiiipprop ri'ate glesjgnation of such y ex h n e V nos may he used as will hereir iafterfgppea' i It i'sinteiided tl be sent by the The atuiit'idnk the uationlof the si 3th gna te; the; keys, 1 to 6 as est; 'Qentrul, and Main, ed by the number thfitnd: if'we indicate the unaffected trains .o

ter N, and the 'uli'ected trains by the letterl i,

clgtjraeterg the ,"lust.

H e, iel o'mdieating thatno key has beenpr jpi s sienpn T0 wns rsnu ELECTRIC w' ese nt 1 'hon nlln the i iift j fiihir trains of impulses ris. calling itlqlflift' I y bnegliey -ivil'l changefthe character offtheflli'rstl train sent, the actg a f .impulsefs hy the lctr" -Troins nf Keys I im ulses. pressed. Designation of called telephone. NN-NN-t)tl 1234 L l N X t)1 North. 1 2 3 4 N L N N t)-2 South 1 '2 3 4 N N L ()--Il East 1 .2 3 4 N N L ()-4 'est 1 2 34. I; 0-5 (Pll il'tiLm'. 1. 2 3 4 N N L L 0 -6 Main 1 2 3 4 L X L N 1- 3 .\"orth East-u--- 1 '2 3 4 N L L X 23 South East--- 1 2 3 4 L X L L 1 South \\'est 1 2 3 4 L N X L '1--l North \\'est 1 2 3 '4, L L L X 5-3 (entral l::\. t l 2 3 4 i L l N L 5-4 ("eutral 'est 1 2 3 4' L NJ, L lt3' North .\lain 1 2 3'4 Ni, i L 2-6 South".\lain 1 .2 3 4 L L L L .'-t3 (eutral .\lain 1 2 3 4 we may call the same telephone numberin sixteen dlti'erent. exchange district after the mauucr of the following tahle:

or smaller numher'of digits are used in the designation of the t.ele|)h(mes.

Other new and useful featul'eswill appear in thcfollowing detailed description and the appended elaims.

v Figure l is a side view of a telephone desk stand to which the "calling device, emhodyiug the features of this invention. is'applied. la rt ot' the desk stand is shown broken awav so that a,-\'ie \v ol' the interior may he had. Fig. :2 is a plan view of the same. .Fig. 3 is a diagrammatic representation of the. circuit connections of a calling device.

Six keys, numhered l to (S, inclusive, are provided, whieh,\vlu-n pressed, setup circuit; conditions to extend the calling line into any given exclumgedistrict, A dial switch 7 is also provided and may he of the type disclosed in the patent granted to Forslwrg, Noveiuher 3t), ltllli. No. l,lti1.8:'i4,

'lhe suhscriher, in manipulating the dial switch, places his finger in one of' the linger holes and rotates the dial Sina clockwise direction until his linger strikes the stop 9. The stop 9, instead of being stationary as in the above mentioned patent is attached to a shaft 10, to the lower end at which is secured an arm 11 carrying a pawl 12. Upon the. movement of the arm 11, the pawl 12 engages the ratchet wheel 13, and rotates the arm 14 successively into engagement with the contacts 15, 16. I7 and 18. that is. upon the first rotation of the dial, the arm 14 will be brought into engagement. with the contact;

15. The dial, in returning to its norgnal position, opens its contacts 19 in thewellv known manner to send the train of impulses over the telephone hne to wluch this apparatus is connected. Upon the second rotation of the dial the' arm 14 will be moved are so arranged that, upon their depression,

they are held in their actuated positions through the agency of individual latches 21, 22. 2a, 2 25 and 20;

2T designates the switchhook of the telephone. Secured to the switchhook is a rod 18, which is attached at its lower end to a bell-cranklever 29, and through such lever operates the rod 30. Rod 30, in turn, is loosely connected to a rod 31 which. upon the movement toward the left, draws each one of the latches 21- 'to 26 out of engagement, with the buttons 1 to 6 in such a' manner as to allow thennto return to their normal positions under the influence of suit:- able springs (not. shown), At the same time the .rod 32,- securcd to-' rod 31, causes the movement. of the-locking pawl 20, whereby the itrin 14 may be released and returned to its normal.positionythrough the agency of.

the spring 37.

It. should be noted that. in the operation 'of this calling dcvice,'the reeeiver of the telephone is first, removed from the hook. This moves the rods 3Q, 31 and 32 to the right in such a. manner that the latches 21 to 26 are made operative and the keys 1 to 6 mav he depressed in any combination and he held in their actuated positions. The arm 14 may he rotated aud'will remain in its set positions since the movement. of rod 32 has allowed the cam 20 to become operative. At the end of a eonversation, when the receiver is replaced on the hook. the, movement of the rods 30,431 and 32 in the opposite direction will withdraw the l'atehcs 21 to Qtland the cam 20 to release the, keys 1' to 6 and the arm 14 to their-normal positions.

Suppose the keys 1 and 3 arevdepressed before the dial switch 7 is rotated. The car- .rcnt furnished to the telephone line from the central otfice travels over the line,33, the.

19 is bridged by the resistance R through key 1, contact 15 and arm 14, hence the impulses transmitted at this time are affected, and the action of the selector switch, which receives the impulses, will be, in turn, affected. a 7

Upon the, second manipulation of the dial '8, however, the arm 14 1S anoved into assoeiation with the terminal 16, and, upon the return of the dialS, and the consequent se-' ries of openings of the line c1rcu1t.at the contact 19, an unaffected series of impulses will be transmitted which will. differently affect the sector switch. a

Upon the third manipulation of the dial 8, the arm H will be brought into association with the contact .17 and since the key 3 has been actuated, the series of impulses sent at this time \vill be all'ected.

Upon the last manipulation of the dial S, the arm 1-! will be moved into association with the terminallS, and the train of inn pulses sent at this time will be unatl'ected in the manner previously described.

At the end of the conversation, the placing of the receiver onthe hook will cause the return to normal of the keys 1 and 3. and the arm ll, as previously described.

What is claimed is: 3

1. In a calling device, an impulse transmitter fol-sending trains of like impulses,

and a set of keys for-modifying the character of all impulses in each of said trains. of impulses.

2. In a calling, device, an impulse tmnsmitter l'or sendin; trains of like impulses, and a set of keys for modifying the electrical character of all impulses in each train of said impulses.

3. In a calling device,a dial switch for sending trains of impulses, a. set of keys impulses, and means controlled by the suc-.

cessive operation of said dial switch for:

operatively associating said keys with said dial switch.

5. In a calling: device, an impulse transmitter, a set of keys. for modifying the character of impulses sent by said transmitter, and means responsive to the successive operation of said impulse transmitter for operatively associating, said keys with said impulse transmitter.

6. In a calling device. an impulse transmitter. means for mot'litying the character of impulses sent by said transmitter; and means responsive to the successive actuation of said impulse transmitter for associating said impulse modifying means with said impulse transmitter.

7. In a calling device. an impulse transmit-te'r for sending trains of impulses, a key for modifying the character of the first train of impulses sent, a key for modifying the character of the second train of impulses sent. a key for modifying the character of the third train of impulses sent, a key for modifying the character of the fourth train of impulses sent, a key for modifying the character of the first and second trains of impulses sent, and a key for modifying the character of the third and fourth trains of impulses sent.

In witness whereof, I hereunto subscribe my name this 20th day of April A. D., 1917.

EDGAR IV. ADAMS.

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