US1348530A - Electrode-holder - Google Patents

Description

T. wlLLARn. ELECTRODE HOLDER. APPLICATION FILED JULY 2 5, 1919'- A Y Patented Aug. 3, 1920.

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UNITED STATES THOMAS WILLARD, 0F SAN BRUNO, CALIFORNIA.

ELEc'rBoDE-HOLDEB.

Application ed July 25,

To all whom it may concern:

Be it known that I, THOMAS WILLARD, a

citizen of the United States, residing in the city of Sa'n Bruno, in the county of San Mateo and State of California, have invented a new and useful Improvement in Electrode-Holders, of which the following is a specification. My invention relates to improvements in holdersfor electrodes used in electric welding wherein an insulated member operates in conjunctionwith a longitudinally movable metallic head to engage and retain an electrode.

The primary object of the present invention is to provide anew and improved holder for weldingelectrodes.

It is also an object of the present invention to provide a new and improved electrode holder of the character described having means for moving a member longitudinally to clamp an electrode between two metallic members. v

A still further object of the invention is to provide insulated members for holding and operating the movable part of said holder thereby reducing to a minimum the possibility and danger of contact of the operator with the metallic holder.

I accomplish these and other objects by means of the improved device disclosed in the drawings forming a part of the present specification, wherein like characters of reference are used to designate similar arts throughout the said specification and rawings, and in which- Figure l'is an elevation'of my improved device;

Fig. 2 is a vertical longitudinal sectional view thereof;

Fig. 3 is a broken elevation of one end of the device disclosing the manner in which an electrode is clamped in position; and

Fig. 4 isa plan view of Fig. 3.

4Referring to the drawings, the numeral 1 is used to designate an insulated member, preferably cylindrical in shape, provided with a central longitudinal bore 2'and a metallicl cap 3 on one end thereof.

A yrod 4 having a threaded portion 6 is slidably mounted within the central bore 2 of the member 1 and is provided with a suitable key 7 which engages the metallic cap 3 \to .prevent rotation of said rod 4 relatively Specification of Letters Patent.

portions -w of the Patented Aug. 3, 1920. '1919. serial No. 313,929. i

to the cap 3 and member 1. The rod 4 is also provided at one end thereof with a me# tallic head 8 equal in diameter to the diameter of the cap 3. The other end o f the. rod is provided with a suitable socket 9 to engage the end of a suitable metallic conductor 11.

An insulated handle 12 is provided with a tubular extension 14 having a central -bore 15 and extending within the central bore 2 of the member 1. The extension 14 is provided with a threaded sleeve 16 whichengages the threaded portion 6 of the rod 4.

The handle 12 is rotatably mounted within or connected to the member 1 by means of ferrules 17 and 18 mounted upon the handle 12 and member l, respectively, and provided with inwardly turned annular flanges which are rotatably engaged by an outwardly faced annular channel 19 whereby said lloiandle 12 may rotate relatively to the memer 1.

-The bore 15 of the handle 12 is provided with an enlarged portion 2l within which the socket 9 of the rod 4 may move longitudinally.

` In operation the conductor 11 is connected to the rod 4 by means of the socket 9. The handle 12 is rotated relatively to the mem ber 1 which will cause the threaded sleeve 16, in'engaging relation with the threaded portion 6v of the rod. 4, to move said rod 4 longitudinally and thereby move the head 8 away from or toward the metallic cap 3 on the ends vof th'e inember 1 and thereby release or clamp an electrode 22 between said head rod 4 is not rotated with the handle 12 but moved longitudinally. within the'member 1 by said rotation.

From the foregoing it is evident that I have provided a new and improved electrode be rotated to release or engage the electrode 22 without twisting the conductor 11 as the holder for electric welding wherein only a small portion of charged metallic surface is exposed to contact with the operator. It is also obvious that said electrodeV may be easily released without contact with the metallic portions of the holder thereby reducing to a minimum the possibility of Contact of the operator with the electrically charged portion of the device.

Having thus described my invention what 'I claim as new and desire to secure by Letthe rod and head longitudinally within the member to engage and retain I`an electrode between said head and cap.

2. An electrode holder for electric welding comprising an insulated member having a metallic cap on one end thereof; a threaded metallic rod slidably mounted within said member and cap and having a metallic head on the outer end thereof; means for connect- 4 ing a metallic conductor to the other end of the rod; and insulated means rotatably mounted upon the insulated member and engaging the threaded portion of the rod ing comprising an insulated member having a central bore and a metallic cap on one end thereof; a threaded rod slidably mounted Within said central bore and having a metallic head thereon; means for preventing rotation of the rod and head relatively to the cap and insulated holder; and an insulated handle rotatably connected to the insulated member and having a tubular extension extending within the bore of the member and engaging the threaded portion of the rod whereby rotation of said handle will move the rod and head longitudinally within the member to engage and retain an electrode between said head and metallic cap.

In witness whereof I hereunto set my signature.

THOMAS WILLARD.

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