US991325A

US991325A - Telegraphic relay.

Info

Publication number: US991325A
Application number: US57014010A
Authority: US
Inventors: Isidor Kitsee
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-07-02
Filing date: 1910-07-02
Publication date: 1911-05-02
Anticipated expiration: 1928-05-02

Description

I. KITSEE. TELEGRAPHIG RELAY. APPLICATION FILED JULY 2, 1910.

Patented May 2, 1911.

WIT/V5838 W ISIDOR KITSEE, OF PHILADELPHIA, PENNSYLVANIA.

TELEGRAPHIC RELAY.

v Specification of Letters Patent.

Patented May .2, 1911.

Application filed July 2, 1910. Serial No. 570,140.

To all whom it may concern:

of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Telegraphic Relays, of which the following is a specification.

My invention relates to an improvement in telegraphic relays and has more special reference to relays adapted to respond to feeble impulses, such for instance as are received on submarine cables.

In my experiments extending over a number of years, I have found that it is greatly advantageous .to provide'the relay contacts with graphite surfaces. I have experimented with different arrangements and placed the graphite at the tongue of the relay as well as on the stationary contacts and I have found that the arrangement, as is illustrated and described in this specification, is more advantageous than all' other arrangements. I have found that a relay, in which the stationary contacts are provided with graphite and the movable contacts are made out of platinum, answers the purpose best where the line has a great capacity and where sticking and sparking would otherwise be present.

The drawing represents in diagrammatic view a preferred form of relay provided with my invention.

In this drawing; 1 is the relay proper; 2 is the movable part of contacting tongue of same; 3 the contactsfor said tongue. These contacts consist of a -metal,platinum or platinum iridium preferred.

4 and 5 are the stationary contacts. The stationary contact 1 consists of the metallic screw 6 and the gra hite 7 This graphite is placed-in the hol ow of the screw in a manner so as to securely fasten therein. The

p F stationary contact 5 consists of the metallic Be 1t known that I, IsIDoR Krrsnn, citizen screw 9 and the graphite 10. This graphite is secured to the screw in the same manner as the graphite is secured in screw 6.

With such an arrangement and with substantially the relay as illustrated, I have received messages over the Canso-New York cable, the cable havin in round numbers 2,000,000 K. R. (capacity multiplied by resistance). The messages were received in Morse characters and translated with the aid of a sounder. In the drawing, this sounder is designated by the numeral 12 and is connected to the polar relay 13 with the interposition of the batteries 14. Thepolar relay 13 is connected to the line relay with the interposition of the batteries 15 and 16.

The cable is designated by the numeral 17.

Having now described my invention, what I claim as new and desire to secure by Letters-(Patent is 1. In a relay, a movable and a stationary contact, one of said contacts consisting of metal and the other ofsaid contacts consisting of graphite.

2. In combination with a telegraphic re lay, stationary and movable contacts therefor, the movable contacts comprisinga metal, the stationary contacts comprising graphite supported by a metal.

.- 3. A telegraphic relay provided with a ISIDOR K-ITSEE.

Witnesses:

MARY 0. SMITH, ALVAH RITTENHOUSE.