US1748912A

US1748912A - Contact-mounting means

Info

Publication number: US1748912A
Application number: US137138A
Authority: US
Inventors: Salisbury M Day
Original assignee: General Railway Signal Co
Current assignee: SPX Corp
Priority date: 1920-04-09
Filing date: 1926-09-22
Publication date: 1930-02-25
Anticipated expiration: 1947-02-25

Description

Fgb. 25, 1930. DAY 1,748,912

' commcrr MOUNTING mums Original Filed April 9. 1920 structed Patented Feb. 2,5, v1930 UNITED STATES SALISBURY M. DAY, OF ROGHESTER, NEW YORK, ASSIGNOR TO GENERAL RAILWAY SIGNAL COMPANY, 01E ROCHESTER, NEW YoRK A CORPORATION OF NEW YORK CONTACT-MOUNTING MEANS This invention relates to'contacts for use in relays of various types and has more particular reference to means for mounting a contact on a carrying arm.

The present application is a division of applicants co-pending application Ser. No. 372,585 filed April 9, 1920, for Improvement in relays.

Among the objects of this invention are to provlde economical, secure, and simple means for connectlng a contact to a carrying arm andat the same timeto provide a good electrical conducting connection between the contact and the arm.

Further objects, purposes and characteristic 7 features of the invention will appear as the description progresses, reference being had to the accompanying drawing, showing solely by way of example, one form which the invention may assume, and wherein Fig. 1 is a sectional detailed view, ofa part ofthe device.

Fig. 2 is a side elevation of a device conin accordance with the present invention.

Referring to the drawings, a support bracket 60, carried by the usual top plate of a relay, carries a screw.62 held in its lower end by means of a nut 63, which screw has a disc-like contact 64 mounted on its head and formed of .a non-corrosive, highly conductive metal, such as coin silver or the lilze.

A contact finger 34, connected to a carrler bar, or electro-magnet armature in. any usual manner, has riveted thereto a spring arm 51,

to the end of which is fastened a contact block 67 A reduced extended portion of the finger 34is bent downwardly to-bear against the spring arm 51 andprevent its flexing in one direction.

The contact button 67 is preferably formed of carbon of a hard crystalline structure, and is impregnated with a small percentage'of copper to increase its conductivlty. Care is taken to not add too great a percentage of copper in order that all possibilit of fusing of the contacts and resulting'stic ing of the same, be avoided. The button 67 has beveled edges and fits into a sheet metal on 68 having its edges spun over around the utton to firmly hold arms 69 are stamped out of thebottomof the cup and are passed through spaced slots 51 mthe spring arm 51 and are then bent toward 9, 1920, Serial No. 372,585. Divided and. this application filed. Se tember 7 22, 1926. Serial No. 137,138. I s.

it within thecup. Two spaced v With the construction described above a 7 ready and secure means is furnished for connecting the button 67 to itscarrying arm 51, and a good electrical connection is formed between the button and its carrying arm.

The above specific description of the present invention is given solely by way, of illus tration and is not intended in any manner whatsoever in alimiting sense, Obviously this invention can assume many different forms and is susceptible of various modifications, and all'such forms and modifications are contemplated as being included by this invention as come within the scope of the appended claims. 7

Having described one form of my invention, I now claim 1. A carbon contact for relays comprising a spring having spaced slots therein, a carbon button with a beveled edge, and a cup receiving said button and having its edge spun over the edge of the button, said cup having prongs stamped out of its bottom which extend through said slots and are bent back to hold the cup in place.

2. In a relay contact, a carrier arm, spaced slots in the carrier arm, a cup, arms stamped out of the bottom of the cup, passed through said slots, and bent towards each other against the rear side of the carrier arm, and a contact button fixed in the cup.

3. In a relay contact, a carrier arm, spaced slots in the carrier arm, a cup, arms stamped out of the bottom of the cup, passed through said slots, and bent towards each other against the rear side of the carrier arm, and a contact button fixed in the cup, and solder connecting the ends of the arms to each other and to the rear side of the carrier arm.

4.. In a relay Contact, a carrier arm, spaced slots in the arm, a cup, a contact having a beveled edge and rigidly and non-removably held in the cup by spinning the edge of the cup over said edge, narrow integral arms stamped out of the cup whereby to leave a large portion of the cup base to support the base of the contact passing through the slots in the carrier arm and bent over to hold the cup tightly to the arm, and solder con-. necting the ends: of the. arms to each other and to the rear of the carrier arm, whereby to form a permanent and low resistance electrical connection between the carrier arm and said contact. e V

5. In a relay, a contact button, a cup nonremovably carrying the button, an arm, slots and cooperating integral lugs carried by the cup and arm for fastening the cup to the arm, and non-removable connecting means between said cup and arm.

In testimony whereof I aflix my signature.

SALISBURY DAY.