US468281A

US468281A - Cut-off for telephones

Info

Publication number: US468281A
Authority: US
Publication date: 1892-02-02
Anticipated expiration: 1909-02-02

Description

(No Model.) 2 sheetsesheet 1.

E. OANN.

GUT-OEE EOE TELEPHONES.

No. 468,281. Patented Feb. 2, 1892.

(No Model.) 2 Sheets-Sheet '2.

E. GANN. GUT-OPF POR TELPPHONES.

Patented Feb. 2, 1892.

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NITED STATES PATENT OFFICE.

EDWIN OANN, OF WINNIPEG, CANADA.

CUT-OFF FOR TELEPHONES.

SPECIFICATION forming part of Letters Patent No. 468,281, dated February 2, 1892.

Application filed October 3, 1890. Serial No. 367,029. (No model.)

To @ZZ whom t may concern:

Be it known that I, EDWIN CANN, of the Ycity of Winnipeg, in the county of Selkirk and Province of Manitoba, Canada, have invented certain new and useful Improvements in Cut-Offs for Telephones, of which the following is a specification, reference being made to the accompanying drawings, in which- Figure 1 is a front View of an apparatus embodying my invention. Fig. 2 is a side view of the same. Fig. 3 is a side View of pointsupport. Figli is a side View of electro-magnet. Fig. 5 is an end view of cutoff, showing audiphone-holder. Fig. 6 is a diagram showing the operation of my invention.

My invention relates, first7 to reducing the number of conducting-wires by enabling a number of telephones to be attached to one circuit; secondly, to enable communication to be had between any two members of one circuit without application to the central oflice for connection, which is only necessary Where it is desired to speak with any one on another circuit; thirdly, to entirely cut oft all other telephones than the two in use, so that no co m munication can be overheard by another; fourthly, to enable a system of telephones to be arranged for a small community without a central otlice, a battery of suflicent capacity being all that is required; fthly, to cutting out all call-bells when two telephones are in communication.

The other apparatus now in general use can be employed without alteration beyond the necessary wire connections.

In the drawings, 1 is an electro-magnet of ordinary construction.

2 is the standard or support to the same, secured to back 18.

3 is the armature; 4.-, the support to the same, secured to back 18, as shown.

5 is a point-support and terminus of wire 1l; 6, point-support and terminus of Wire 13; 7 a, vulcanite or non-electric conductor-beam working on center-pin 7 gwhich passes through back 18.

7G is a lever attached to 7b at the back of 18, with holder 7e for telephone attached, as shown. l

7dn 7 d are spring-rnetal plates secured to 7.

7r is a nut holding 71 in position.

8 is the positive wire, and 9 and 9SL are continuations of positive Wire 8.

91 is the negative wire; 10 and 10, call-bell circuits; 11 and 12, call-bell connecting-Wires; 13, call-bell cut-oit connecting-wire; 11 and 15, telephone-wires; 14LL and 15a, continuations of 14. and 15, respectively.

16:, 1Gb, 16C, 16d, 16C, 16f, 16g, and 16h are studs secured to 18, as shown.

17 17 are platina points in 5 and 6.

18 is the board upon which the apparatus is fixed.

19 is the ordinary bell attachment.

20 is the ordinary telephone-trans1nitter; O, the battery.

Fig. 6 is a diagram showing a circuit of four telephones A B C D, to which others may be added. A and C show the position of the cutoff when the telephones are not in use. B and D show the position of the cut-oft in each while the communication is going on. When the speakers have finished, the telephone is placed on the holder 7 C, which draws the cuto into the position shown at A and C. The position of the cut-ott being as at A, the sender signals on the call-bell the number representing the person on the circuit to whom he desires to speak, which is answered by the receiver. The sender then moves his lever 7c to the right or left, according to his position on the circuit, the receiver moving his lever in the opposite direction. This places them in direct communication, the remaining telephones being neutral and are cut off completely. Taking the diagram 6, showing the position of the cut-offs on the circuit, then the electric current starting from battery O passes along wire 8 to studs 1Gd at station A; spring-plate 7d, stud 16e, wire 9, electro-magnet 1, wire 9 to stud 16d in station B; springplate 7 1,stud 16C, Wire 15, and stud 16f to telephone by wire 15 onto stud 16g by Wire 14a, plate 7, stud 16, wire 13 to point-support 6, thereby diverting the current from Wire 9 and magnet 1 allowing armature 3 to spring back in contact with point 17 in support 6, carrying current by support 4, wire 10n to stud 16a in station C; spring-plate 7 d, stud 16h, wire 13, support 6, armature 3, wire 10a, stud 16 in station D; spring-plate 7 d, stud 16", wire 14 15, stud 16g, wire 1i to telephone 20, wire 15,

IOO

sounded, thereby indicating to station call-ed in which direction to turn the switch, calling station turning in opposite direction,as shown at station B and D, thereby bringing their telephones into circuit and cuttingout all others and call-bells. Call-bell at station A is out out by break in circuit at stud 16a in station B. B and VC are cut out at point 17 in stupport, and D by break at 16h.4

I make no claim for any particular form of electro-magnet or armature; but

What I do claim, and desire to secure by Letters Patent, isn 1. A three-wire system 'of telephone communication having a non-electric conductor bealn 7 Working on a center-pin 7b, lever 7,

with telephone-holder 7 e, spring-metal plates '7d 7d, nut 7f, and

studs

16, 16h, 16, 16d, 16e, 16f, 16g, and 16h, and with Wires, substantially as and for the purpose set forth.

2. A three-Wire system of telephone communication having a non-electric conductorbeam 7", Working on a center pin 7b, lever 7C, with telephone-holder 7 e, spring- metal plates 7d 7d, nut 7f, and studs 16% 16), 16S-16d, 16C, 16f, 16g, and 16h, with Wires, in combination Withelectro-magnet 1, support 2, armature 3, support 4, and point-supports 5 and 6, With points 17 17 and wires, substantially as and for the purpose above set forth.

3. A vulcanite or non-electric conductori beam 7, center-pin 7b, lever 7, spring- metal plates 7d 7d, telephone-holder 7e, nut 7f, and

studs

16a, 162166, 16d, 16e, 16f 16g, and 16h, in combination with electro-magnet 1, support 2, armature 3, support 4, and point-supports 5 and 6, with platina points 17 17, substantially as and for the purpose specified.

Winnipeg, Manitoba, August 29, 1890.

EDWIN CANN. Witnesses: i

JOSEPH Tiros. CARTER, JAS. PETTIGREW.