US1045212A - Electrical contact. - Google Patents

Description

Hi1". STRATTON. ELECTRICAL CONTACT. APPLICATION FILED AUG.19, 1912.

1,045,212. Patented Nov. 26, 1912.

WITNESSES Qkd dm ATTORNEY.

sTA'rEs r irETNroFFioE.

ELECTRICAL conracir.

Be it known that I, HARRY- F. SrRA'rroN, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented new and useful Improvements in Electrical Contacts, of

which the following is-a specification.

My invention relates to-electrical contacts In particular it relates to contacts used in drum type controllers in which a relatively stationary contact is arranged to be engaged by a movable contactrevolved under it in any of the well known ways.

One of the objects of my invention is to provide a contact universally movable so as to enable its full surface contact to engage a cooperating cont-act which may be, of irregular shape. L

Another ob'ect is to preserve the full surface contact etween the cooperating contacts as either or both pf them weardownJ especially if one portion of c then contact wears faster than another.

Other advanta will be obvious aspointed out in t e-i following description "and claims.

T o more fully explain my invention I will refer to the accompanying drawings, of

, which-- Figures 1 and 2 are'elevations and part sections of the dev1ce, and F g. 3 is an end view of the contact tip,2 .'howmg the adapt a hility of the contact -gar to a worn or 1rre ular shaped moval)l e;t :ontact.

cfcrring to the drawings, 1 1s a partial view of a revolving drum which carries a contact 2 adapted to engage the tip 3 of the relatively stationary contact finger 4. The finger 4 is supported by a holder 5 mounted on a. support- G. The holder 5 is adapted to receive an electrical conductor clamped by the not 7, and the current is carried from the holder 5 to the finger 4 through a flexible connection 8. The finger 4 is held' in position against the projection 9 of the holder 5 and the stud 10 by means of the compression spring 11, which is held in its compressed position by a cotter pin l2 passing through the ping13 which is screwed into the holder 5, as shown in the drawing..-5? 1he stud 10, which supports the back -end'et" the finger 4, is formed into a sphericalshape at 'recess to engage the. stud 10 at this point,

Specification of Letters-Patent. ,Pateflte'dNov. 26,1912. Application med August 19, 1912. Serial No. 715,761."

so t-hat the finger may revolve about the po nt of-co'ntact with the stud 10 as a pivot whenthe contact 2 engages the finger tip 3.

As the contact 2 comes into engagement wlth the fingertip 3, the forward end of the finger is raised off of the projection 9 about the stud 10 as a pivot, and if the contact 2,

or the lower surface of the tip 3, is not eX- actly true,'the finger 4. will also be tipped to' one side or the other about the spherical surface of the plug 10 so as to make full contact between the 133! 1': s'rm'r'ron, or CLEVELAND, 0x110, assmivon TO THE ELECTRIC CONTROLLER 4ND MANUFACTURING COMPANY, or CLEVELAND, OHIO, A coaronarxon DE 01110.

parts..2 and This arrangement is indicated in Fig. 3, which shows the contact 2 to be worn away to a greater extent on the left-hand side than on the right, but the finger 4, with its contact tip 3, adapts itself to the irregular surface of the contact.- 2 by reason of the pressure of the spring 11 revolving the finger in'the position shown. This arrangement is of particular advantage when a new finger is placed in an old controller, for anyreason, in which the contacts on the "'drumh'ave worn to any considerable degree. When the new finger is put in place it willreadily adapt itself. to the contact surface of .the contact 2 regardless of its condition.

The pressure between the contacts can be regulated by adjus down. bears against the hexagon sides of the stud 10 and holds it in whatever position it is adjusted.

Aspring clip '14 is provided which ting the stud 10 up and I have shown the finger 4 constructed of v a metal bar of channel section, as shown in Fig. 2, but it is obvious that the finger may assume other forms as desired. I claim'- 1. In an electrical contact, a hdldcr, a contact member supported thereby, a spherical hearing for the contact member carried by said holder, and a spring for holding the contact member on the said bearing.

.2. In a contact device, a holder, a contact member, means for supporting said contact member near its ends, a spring for holdingthe member, against the supporting means,

and a spherical hearing between the contact member and oneof said supports.

3. In a contact device, a contact member, a coiiperatin'g'contact which supports one end of said member, a spring for holding said member against said cotiperating contact, and a spherical support/for the other end of said member.

4. In a, contact device, a. contact member, a coopetatingeontact which supports. ne end of .said member, a spring for holding said membcrngainst said cooperating con- 5 toot, a. spherical support-forth: other end member against ssaiilw coopezating contact, and a supportfor theother end of said memher which allows said member to tnrnnbout its-longitudinal axis.

.of August, 1912.

,f HARRY F. STRATTON. Witnesses:

Signed at Cleveland, Ohio, this 16th day 1.5

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