US666883A - Communicating system. - Google Patents

Description

No. 666,883. I Patented Jan- 29, l90l. v l- KITSEE.v

COMMUNICATING SYSTEM.

(Application filed. Feb. 20,1896.)

(No Model.)

@QDEJ GROUND GROUND "I I I D J-E 'Jfl GROUND GROUND W itnesses, I 'nventor.

UNTTED STATES I FErcE.

PATENT ISIDOR KITSEE, OE PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO CHARLES E. WILSON, OF SAME PLACE.

COMMUNICATING SYSTEM.

SPECIFICATION forming part of Letters Patent No. 666,883. dated January 1901- Application filed February 20, 1896. serial No. 630.050- (llo model.)

To a whom it mcty concern:

Be it known that I, IsIDoR KITsEE, of the city and county of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Electric Communications, of which the followingis a specification.

My invention relates to telephonic circuits.

The object of my invention is to use a tele- 1o phonic circuit for telegraphic communications simultaneously with the sending of telegraphic messages over the same circuit.

Repeated experiments have established the fact that if a metallic circuit at the terminals of which telephonic instruments are inserted is grounded between the terminals Wit-l1 the intervention of one or more condensers the telephonic communications between the two terminals are not interfered with. On the contrary such insertion and grounding of the condensers has beneficial effect upon the conditionof the line. Again, if alternating currents of high frequency (no matter how low their intensity) are sent over a line-wire the intervention of condensers will only intensify the action upon another condenser if employed as a receiver. demonstrated the practicability of simultaneously using part of the telephonic line 0 grounded through condensers for certain telegraphic communications without interfering with the telephonic messages, or vice versa.

Referring now to the drawings, Figures 1 and 2 are electrical diagrams of telephonic 5 circuits embodying my invention.

In Fig. 1 wires 1 and 2 are the circuits connecting telephonic stations A and A with each other. The station A is provided with the telephonic receiver 0;, and the station A is provided with the similar instruments at. Between these two telephonic stations are the two telegraphic stations T and T, similar parts of these stations being designated by similar letters, with the exception that the parts of station T are also provided with the numeral 1. H and H are condensers connected at places more or less remote from stations A and A to line-wire 2. In series with these condensers are the coils E and E and the keys D and D, the lower parts of Experiments have also which are connected through switches S and S to sources of current X and X or to ground, the opposite terminals of the sources of current being also connected to ground. The sources of currents have to be rapidly alternating or recurring. At the sending-station the operator manipulates his key in the usual manner; but it has to be understood that each closing of the key does not only send one impulse over the line, but a series of such impulses, the flow time of which corresponds with the closing of the key, a dot with its short closing time sending impulses over the line for a shorter period than a dash with its longer closing time. These impulses travel over the line-Wire and the coil inserted in the line at the receiving-station. As around the coils E and E, sending as well as receiving station, the condensers B and B,respectively, are shunted, it follows that as each multitude of impulses induces one continuous whistling sound in such condensers the operator at the receiving-station will be enabled to distinguish between the difference of characters dots or dashes-through the shorter or longer duration of this sound.

Speaking of Fig. 2, the line-wire 2 is not in electrical connection with the primary coils E or E, but is connected with the secondary coils F and F, which coils have in their prox- 8o imity the tertiary coils G and G. In this method the impulses which flow through the localized primary coil E are translated with the aid of the secondary coil connected to the linewire into impulses of the desired intensity, and these so-transmitted impulses may then be translated with the aid of the tertiary coil into impulses of the necessary intensity if a condenser should be used as a receiver. 0

I prefer the employment of a secondary coil connected to the line-wire, because it obviates the difliculty of battery or dynamo connections, and it also allows the translation of the impulses to be sent to any required in- 5 tensity. Where the condenser is employed as receiver, the third coil is only necessary for the purpose of raising the electromotive force of the transmitted electrical impulses for such a combination of apparatus.

[0 through one terminal with the ground and through the other terminal, with the interposition of a sending-key and condenser, to the telephonic circuit.

In testimony whereof I sign my name, this 17th day of February, 1896, in the presence [5 of two subscribing witnesses.

ISIDOR KITSEE. Witnesses:

WALLACE B. ELDRIBGE, GEO. M. COSTELLO.

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