US1144745A - Relay. - Google Patents

Description

S. ELWITT.

RELAY.

APPLICATION FILED OCT. 7.1912.

1,144,745. I PatentedJune,29,1915.

WITNESSES UNITED STATES PATENT onnron.

SAMUEL E. WITT, OF CHICAGO, ILLINOIS, ASSIGNOR TO AUTOMATIC ELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

RELAY.

Specification of Letters Patent.

Patented June 29, 1915.

Application filed October 7, 1912. Serial N 0. 724,479.

To all whom it may concern:

Be it known that I, SAMUEL E. VVITT, a citizen of the United States of America, and resident of'Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Relays, of which the following is a specification.

My invention relates to improvements in relays, and more particularly to an improved mounting for the relay armature.

An object of my invention is to provide an armature which may be easily put in place and removed and a mounting which allows free movement of the armature without permitting any lost motion. I A further object is to provide a mounting of this character in which the armature is mounted upon a knife-edge bearing and no pivot screws arcnecessary for holding the same in place.

My invention will be more readily understood by reference to the accompanying drawings, in which Figure l is a side elevation of a relay e bodying the principles of my invention. Fig. 2 is a top end view of the same. Fig. 3 is an enlarged view of the armature bearing.

Referring to Fig. l, I have shown a relay comprising the magnet A adapted to be supported by a heel-piece B which is secured to the magnet by means of a screw at the base of the same. Mounted upon this heel-piece B and insulated therefrom there is a pair of contact springs C. While I have shown but a single pair of contact springs, it is, of course, obvious that .a plurality of such pairs couldbe mounted on this heel-piece and operated simultaneously therewith. Likewise mounted on, this heel-piece is a pair of curved flexible pieces of metal D. These members are mounted on opposite sides of the heel-piece, as clearly shown in Fig. 2,

and are provided with a pair of notches H.

The armature E for the electromagnet is provided with a pair of upwardly-inclined end portions E, which end portions are provided with flanges F which engage with the notches H in the members D. The point of contact is directly in line with the rear end of the armature E and the front edge G of the heel-piece B. With this arrangement thearmature is firmly but lightly held in place, allowing the same to swing or tilt on its fulcrum. As thus mounted the armature operates with a minimum amount of friction and play owing to the fact that a knife-edge bearing provided at the point where the upper edge G of the heel-piece B engages the armature This point being directly in line with the point at which the members I) engage the armature, all backward and downward pressure is eliminated, thus allowing the armature perfect freedom. Carried by the armature E there is an operating arm I provided with an end portion which bears against one of the springs C and operates the same in a manner which will be readily understood.

It will thus be seen that I have devised a relay which, when once assembled, will always remain in perfect adjustment, Without any particular attention, on account of not having any pivot screws to become loose or bind, or any place where friction will cause impairment to the free movement of the armature. In order to remove the armature from the relay it is merely necessary to press the flexible arms D outward beyond the lugs F and the armature can then be readily removed.

While I have illustrated one particular embodiment of my invention, it will be understood that I do not wish to be limited to the exact construction shown and described.

What I claim as my invention is 1. In a relay, an electromagnet, an armature therefor, a heel-piece secured to said electromagnet, and a pair of members carried by said heel-piece, and extending at substantially right-angles to said armature, adapted to hold the edge of said armature against said heel-piece.

2. In a relay, an elcetromagnet, an arma ture therefor, a heel-piece secured to said electromagnet, and a pair of flexible members mounted on said heel-piece, and extending at substantially right-angles to said armature, adapted to hold the edge of said armature against said heel-piece.

3. In a relay, an electromagnet, an armature therefor having rearward extensions on i for, a heel-piece secured to said magnet, and

a plurality of curved metallic flexible members mounted upon said heel-piece and holding said armature against said heel-piece.

6. In a relay, an electromagnet, an-armature therefor, a heel-piece secured to said electromagnet having a portion'extending substantially parallel therewith, and a pair adapted to hold said armature against said heel-piece, said members engaging said heelpieee in substantial alinement with the upper edge of said armature and the upper for- Ward edge of said heel-piece.

7. In a relay, an electromagnet, an arms,

ture therefor, a-heel-piece secured-t0 said electi-omagnet and having a portion extending substantially parallel thereto, apair of flexible members mounted uponsaid heelpiece, and a pair of extensions on said armature engaging with said flexible members and adapted to hold said armature against heel-piece in substantial alinement with the rear edge of said armature and .the' upper forward edge-of said heel-piece. of members carried by said heel-piece and Signed by me at Lincoln- Lancaster county, Nebraska, this'24cth day of September,1912.

SAMUEL E. WITT. Witnesses:

SELMER G. OFTEDAHL,

'WALTER J. F'Ums.

25 'said heel-piece, said members engaging said

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