US765142A - Telephony. - Google Patents

Description

PATENTED JULY 12, 1904.

I. KITSEB. TELEPHONY.

Arrmoulon FILED AUG. 27. 1903.

N0 MODEL.

Gnomi e1 i wir" ze.:

UNITED STATES Patented July 12, 1904.

PATENT 'OFFICE TELEPHONY.

SPECIFICATION forming part of Letters Patent No. 765,142, dated July 12, 1904.

Original application iiled March 7, 1901, Serial No. 50,232.

To @ZZ wh/mn it many concern:

Be it known that I, IsIDoR Krrsnn, a citizen of the United States, and a resident of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Telephony, of which the following is a full, clear, and complete disclosure.

My invention relates to improvements in telephony, and involves particularly those parts of telephone systems located at the central exchanges, especially switchboards and theiraccessories for making connections between different subscribers stations.

The object of my invention is to facilitate the connecting of two subscribers circuits, doing away with the inconvenient and cumbersome cord-circuits or cord connections, thereby reducing Ithe number of operations necessary in making' connections and at the same time making many of said operations automatic in their action.

The subject-matter of the present application involves certain features of the systems above referred to which have been particularly described and claimed in my prior application, Serial No. 50,232, filed March 7, 1901, of which this application is a division. The features of my invention covered in this application involve certain details of construction, particularly those of the switchboards, plugs, and connections therefor.

For a full, clear, and exact description of these features of my invention reference may be had to the following specification and to the accompanyingdrawings, forminga part thereof, in which- Figure l represents an elevation of a switchboard; Fig. 2, a view of one of the connecting-plates and its operating-magnet; and Fig. 3, a view showing the connections for two plugs in the call and distributing switchboards, respectively, together with details of the plugs and their sockets.

l represents what I term a call-boardthat is, a board to which the calls are primarily sent and in the leads to which from Aeach station a drop or other annunciator may be inserted to call the attention of the operator. The distributing-board-that is, the

Divided and this application filed August 27, A1903. Serial (No model.)

board from which the call is sent to the station desired to be connected to a station which has called up through the call-board-is similar to the call-hoard, but preferably contains a greater number of plugs. It is obvious that each outlying station must have a plug-switch in both a call-board and a distrilniting-board in order to allow of any station being connected with any other.

Since one operator cannot attend to all the plugs or lines in one switchboard, the callboards are divided into sections, each consisting of a suitable number of plugs to be easily taken care of by one operator. Several of these sections of the call-board may be placed opposite one distributing-board, and the latter may be duplicated until there is room for all the sections of the call-board. This arrangement does not differ from those in the well-known central-station practice of the present day. The call and distributing boardsmay be placed in the same vertical frame; but this is not essential, as they may be placed according to choice and convenience.

My improved connecting or switch boards are especially applicable to be used with the so-called centralenergy telephone systems or those where a closed circuit is maintained to each telephone-station when the same is not in use, although they may be adapted to be used with other systems.

2 and 3 are contact-plates which are located at the limit of the outward movement of the plug 4 and are connected, respectively, with the poles of a common main battery 44. The plugs and terminals are arranged on the boards in regular polygonal figures and preferably in vertical and horizontal lines, forming squares, as in switchboards now in use, there also being' but a single terminal for each line in a one panel or board.

The plugtis preferably of non-conducting material and is surrounded by the semicylindrical. halves of the plug-socket 5 and 6, to each of which is connected one of the leads from a telephone-station. The plugll has an extension 7, which passes through an opening in the fixed plate 8 and is adapted, in connection with the parts and (i ot the plug-socket, to form a guide tor the plug 4. i'. spring Si, interposed between the plate 8 and the bottom ot' the plug 4, acts to return the plug to its normal or inoiiei'ative position.

1'0 is a loi'igitiulinal contact carried by the plug 4, which is adapted to form an electrical connection between the parts 2% and ('3 when the plug is in its normal or inoperative position.

11 is a lixed plate o'lI coi'iductive material and is located adjacent the ends ot the plugsoclets, so that when the plug is depressed the contact 1() will make electrical coniiection between the same and the part (5, as shown in Fig. 3.

12 is a contact carried by the pl ug 4, which is always in contact with the part 5 ol the plug-socket and connects said part with the part 2 when the plug is in its normal position.

13 13, &c., are conductive plates or trames, so connected as to be operative in pairs, one plate ot' each pair being located in the call and distributing boards, respectively, and have slots 14 formed therein through which the plugs 4 are adapted to pass. These plates are insulated from each other and are carried by rollers 15 or other suitable antit'rictioii devices. r1`hey ai'e held in their normal or inoperativepositionsbysuitable springs 1o. 'lihe plates 13 correspond to the cord connectors in the cord-circuit systems and are o t a similar num ber-*to wit, about ten per cent. ot' the number of stations connected to'any one panel ot' a switchboard. ',lhe slots in the plates 18 are ot' sutiicient length to allow either one ot the pawls 18 or 17 to pass therethrough in either direction, .according to whether a plate is in its operative or inoi'ierative position. rl`he pawls 18 and 17 have insulating-strips 2O and 19 upon one side thereol, respectively, so that in passing' the plates 123 in one direction no electrical contacts are made therewith. The pawl 17 is held in its normal raised position by the spring-arm 21, and the pawl 18 is adapted to rest upon the spring-arm 2Q by gravity when in its lower or inoi'ierative position. 23 isa pin or projection carried by the pawl 18 and is adapted to contact with the upper edge oi.: the pawl 17, so that when the pawl 17 is raised 18 will be depressed and when 18`is raised 17 will be depressed. rlhese pawls 18 and 17 are pivoted upon a pin 24, which has electrical connection with the contact 12 by means o1" the wire then the plug -1- is depressed, the pawl 18 will engage the lirst plate which is notalreadv in use to make a connection. Thisis due to the tact that the slots 14 are so located that when the plates 1?) are moved by their magnets one end o'l the slot will come inio alinement with the end oli' the pawl 18 and allow the same to pass without iiiterruption, rl`he pawl 18 will therefore engage the lirst plate which is not in use, and as the inward movement ot the plug 4 is continued the pawl 18 will be raised, thereby depressing and extending the pawl 17. At the same time the lower uninsulated side ot' the pawl 18 will contact with the plate and malte a connection to energize a magnet 26 to draw the plate into its operative position. As the plate 18 is drawn over the plat'e at the opposite end of the slot passes over the end et' the pawl 17, which has been depressed, therebyT making a contact with the uninsulated part ot' thesame, which maintains the action ol" the magnet 26 iirst energized, while at the same time the pawl 18 is allowed to drop into its original position. as illustrated in the upper part of Fig. 8. The magnet 26 is energized by the battery 27, the current passing' through the armature 28, hereinafter to be more particularly described, contact 2 9-, magnet 26, plate 13, pawl 17, wire Q5, contact 12', and contact 5 to battery 27.

28 is an armature which is normally in contact with the point 29 and is retained in that position by the arm 30, which in the plates of the call-board is insulated, but in the distribating-board is electrically connected with the plate 1B. A .clearing-out magnet 31 acts upon the armature 28 to withdraw it from the point 29 when the arm 30 allows it to do so by. reason et' the movement ot' the plate 13. The magnets 31 are electrically connected in pairs corresponding to the pairs ot' plates in the call and distributing boards and not energized until both receivers are oti their hooks at the calling' and the called telepl'iones. This is made possible Ytroni the fact that the leads 33 and 4G are connected to the parts 5 and in each board, respectively, which will allow the current to passthrough the contacts 1Q, wires Q5, pawls 17, plates 13, magnets 26, and magnets 81. In the distributing-switchboards the arms 30 contact with points 35 when the plates are attracted by the magnets. These points 85 are connected toground 36 through the batteries 87. 38 is a battery, cach pole o1 which is connected with the plates 11 in the call and distributing boards, respectively.

iCach telephone-station is provided with the usual contacts consisting ot' thepoints 39 and 4l), which are adapted to be engaged by the receiver-hook lever 41, the point4O being connected to ground 42 through the vibrating call-hell 48.

Operation: Supposing a call has been made Vfrom the station A, the plug' 4 in the callboard is then depressed, thereby putting the pawl 17 in contact with the plate 13, which is attracted by the magnet 26, as above described. The operator at the call-board then ascertains Yfrom the subscriber at station A what other station he wishes to converse with and thereupon depresses the plug corresponding to that station in the distributingboard. then the plug 4 in the distributingboard is depressed, the disengaged plate 13, corresponding to the plate 13 just operated in the call-board, is connected with the plug and its corresponding magnet 26 energized. The arm 30 then contacts With the point 35, thereby closing a circuit from battery 37 through ground 36, ground 42, bell 43, contact 40, lever 41, lead 46, part 5, contact 12, Wire 25, pawl 17, plate 13 to arm 30, and contact 35. The bell at station B is therefore kept ringing until the call is answered and the receiver is lifted from its hook-lever 41. When this is done, both magnets 31 are energized and the armatures 28 withdrawn from the points 29. Both telephone instruments are then connected together through the battery 38 by a circuit passing through the plate 11 of the distributing-board, contact 10, part 6, lead 45, lead 46, part 5, contact 12, Wire 25, pavvl17, plate 13, magnet 26, magnet 31, magnet 31 of the callboard, magnet 26plate 13, paWl 17, Wire 25, contact 12, part 5, leads 33 and 32, part 6, contact 10, plate 11 to battery 38. Both stations are therefore connected for talking and remain in that condition until one of the receivers is replaced on its hook, thereby breaking the circuit through both pairs otl magnets 26 and 31, Which returns the plates 13 and plugs 4 to their normal positions. Then in their normal positions the plugs 4 connect the battery 44 with the leads Jfrom the stations through the parts 2, 12, 5,- and 3, 10 and 6, thereby keeping the subscribers lines 33 and 46 constantly energized when said lines are not in use. The stations, annuciators or calls, and the operators telephones may be connected with the line-terminals in any Well-known Way Which Will be self-suggestive to one skilled in the art, and I have not shown the same, as they form no part of my invention, and their omission simplilies the description.

Changes may be made in the form and arrangement of parts Without departing from the spirit and scope of my invention; but

That I claim, and desire to protect by Letters Patent of the United States, is-

1. In a telephone-switchboard, line-terminals, plugs for the terminals, movable contacts having portions adjacent each of said plugs and adapted to be connected with any one of said plugs, and means for preventing all but a single plug from engaging one of said contacts not in use.

2. In a telephone-switchboard, line-terminals, plugs for the terminals, movable plates having portions adjacent each of said plugs and adapted to be connected with any one of said plugs, and means for preventing all but a single plug from engaging one of said contacts not in use.

3. In a telephone-switchboard, line-terminals, plugs for the terminals permanently carried by the board, and arranged in polygonal figures, and longitudinally-movable contacts having portions adjacent each of said plugs and adapted to be connected with any one of said plugs.

4. In a telephone-switchboard, line-terminals, plugs for said terminals permanently carried by the board and arranged in polygonal iigures, and slidable contact-plates having portions adjacent each of said plugs and adapted to be connected With any one of said plugs.

5. In a telephone-switchboard, line-terminals, plugs for said terminals permanently carried by the board and arranged in polygonal figures, and slidable contact-plates, having openings therein adjacent each of said plugs and through Which' the latter are adapted to pass to connect any one of said plugs With any one of said plates.

6. In a telephone-switchboard, line-terminals, plugs for said terminals permanently carried by the board and arranged in polygonal figures, slidable contact-plates having openings therein adjacent each of said plugs and through which the latter are adapted to pass and means for connecting said plugs with said plates.

7. In a telephone-switchboard, line-terminals, plugs for said terminals, slidable contacts having portions adjacent each oi' said plugs and means carried by said plugs for engaging a contact not in use and for connecting the same to the terminals.

8. In a telephone-switchboard, line-terminals, plugs for said terminals, slidable contacts having portions adjacent each of said plugs, means carried by said plugs for engaging a Contact not in use and for connecting the same to the terminals, and means for moving said contacts into operative position.

9. In a telephone-switchboard, line-terminals, plugs for said terminals, slidable contacts having portions adjacent each of said plugs and pawls carried by said plugs for engaging a contact not in use and for connecting the same to the terminals.

l0. In a telephone-switchboard, terminal plugs, movable contact-plates having portions adjacent each of said plugs and pawls carried by said plugs adapted to pass through openings in said plates for engaging a contact not in use and for connecting the same to the terminals.

11. In a telephone-switchboard, line-terminals, a plug for each terminal, a series of conductive plates, a part of each plate being adjacent each terminal, automatic devices for each plug for engaging any one of said plates, means for operating said plates to connect said terminals electrically With other points.

12. In a telephone-switchboard, line-terminals therein, a plug for each terminal, a series of slidable conductive plates a part of each plate being adjacent each terminal, pawls carried by each plug for engaging any one of said plates, electromagnetic means for oper- IOO IIO

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ating' said plates, said electromagnetic means being' controlled by said pawls to connect said terminals electrically with other points.

13. 1n a teleplione-switchboard` plug-socl ets for each line-terl'ninal, a plug for each socket, pawls carried by each plug', a series ot' slidable conductive plates adapted to be engaged by any ot' said pawls, magnets controlled by said pawls ior drawing said plates into operative position so as to be permitted to engage the pawls or' but one plug at a time to connect said terminals electrically with other points.

14. ln a telephone-switchboard, plug-socl ets for each line-terminal, a plug Vtor each socket, pawls carried by each plug having parts thereof insulated, a series o't slidable conductive plates adapted to be engaged by the uninsulated parts of any ol'l said pawls. magnets controlled by said pawls t'or d ra wing Said plates into operative position and electromagnetic clearing-out devices also controlling said mag'nets.

15. 1n a telephone-switchboard, plug-sockets for each terminal, a plug' Alor each socket, a lixed conductor having parts adjacent cach of said plugs, a battery connected with said conductor, a slidable contact carried by each plug adapted to connect said conductor and the plug-socket, pawls carried by each plug, a series of slidable conductive plates adapted to be engaged by any or' said pawls, magnets controlled by said pawls for drawing said plates into operative position, and electromagnetic clearing-out devices also controlling said magnets.

16. In a telephone-switchboard, plug-sockets for eachv terminal, lixed contacts adjacent said plug-sockets, a battery connected between said contacts, a plug for each socket, a tixed conductor having parts adjacent cach o't' said plugs, a battery connected with said conductor, slidablc contacts carried by each plug' adapted to connect said conductor and said contact and also to connect the parts ot said plug-sockets with said iixcd contacts lto energize the lines, pawls carried by said plugs, a series of slidable conductive plates adapted to be engaged by any of said pawls, magnets controlled by said pawls for drawing said plates into operative position and electron'iagnetic clearing-out devices also controlling said magnets.

17. ln a telephone-sw.itchboard, plug-sockets for each line-terminal, a plug for each socket, pawls carried by each plug, a series ot' slidable conductive plates adapted to be cn,- gaged by any of said pawls, magnets controlled by said pawls for drawing said plates into opcrative position, electromagnetic clearing-out devices also controlling said magnets, and projections carried by each slidable plate adapted to render said clearing-out devices inoperative when said plates are in their inoperative or normal positions.

18. ln a telephone-switch board, plugs, pivoted pawls, carried bysaid plugs and a series o't' movable contacts with any one of which said pawls are adapted to engage according to the position ot' said contacts.

19, ln a telephone-switchboard, plugs, two pivoted pawls projecting' from each plug, a series o'l movable contacts with any one otA which one ol said pawls is adapted to engage when in inoperative position and with which the other ol said pawls is adapted to engage when in oj'icrative position and means Jfor moving said contacts into operative position.

21).' ln a telephone-switchboard, plugs. two

.pivoted pawls, projecting from each plug, a

series oli' movable contacts, connections between said pawls iu each plug t'or causing oneI pawl to engage any one ol said contacts when in inoperative position and for causing the other ot' said pawls to engage the same coutact when in its operative position and means 'lfor moving said contacts into operative position.

21. lu a telephonc-switchboard, plugs, two

" pawls carried by each plug', said pawls being pivoted on the same axis and one ot' said pawls having a projection adapted to engage the other to cause each to rotate with the other when moving in one direction longitudinally of the plug, movable contacts adapted to be engaged by said pawls and means for moving' said contacts.

ln a telephone-switchboard, plugs, two pawls carried by each plug said pawls being pivoted on the same axis and one of said pawls having' a projection adapted to engage the other pawl to cause each to rotate with the other when moving' in one direction longitudinally of the plug, a spring for holding one otl said pawls in position within the plug', movable contacts adapted to be engaged by said pawls, and means for moving said contacts.

,ln testimony whereof 1 have signed my name, in the presence of two witnesses, this 6th day of August, 1903.

ISIDOR KITSEE.

lvitnesses:

Lnwis H. VAN DUsuN, Enw. W. VAILL, Jr.

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