US1313572A

US1313572A - Eiectbic welding-tool

Info

Publication number: US1313572A
Authority: US
Publication date: 1919-08-19
Anticipated expiration: 1936-08-19

Description

1. K. BAKER AND T. E. MCGUIRE.

ELECTRIC wELmNG TooL. I

APPLICAHON FILED DEC. 9.1918 1,3 l 3, 57 2 Patented Aug. 19, 1919.

WITNESSES WQ/6pm...

4UNITED siwrns PATENT Ormes..

JOHN x. BAKER, oF IRWIN, AND THOMAS n MQGUIBE, 0E EAST rrrrsnimen,

PENNSYLVANIA.

l ELEoTmc-wELnING-roor..

To all whom t may "concern:

Be it known that we, JOHN K. BAKER and THOMAS E. MoGumE, citizens of the United States, residing, respectively, at Irwin and East Pittsburgh, in the respective counties of Westmoreland and Allegheny and State of Pennsylvania, have invented a new and useful .Electric `Weldimggflool, of which the followingis a speciiication.

This invention has reference to electric Welding tools, and its object is to provide a tool especially adapted for arc welding.

In accordance with the invention there is provided a handle with a shank carrying a leaf spring, the shank and leaf sprlng being provided rwith "opposed jaws correspondingly notched to receive a rod electrode such as is commonly used in arc welding. The electrode holders are rotatablev and associated with the spring isa lever for moving one electrode holder away from the other 1n opposition to the normal tendency Aof the spring. The handle end of .the electrode holder contains a terminal orl connection for the reception of 'an electric conductor, the work itself constituting the opposite electrode of the device. l

The invention will loe best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this Specification, with the understandy ing, however, that'the invention is not conyfined lto any strict conformity with the showing ofthe drafwing but may be changed and .modified so long as such changes and mod-ifications mark no material departure from the salient features ofthe inventionvas expressed.

in the appended claims. In the drawing Figure 1 is a perspective view of the elec-4 l-trode holder with-an electrode mounted therein.

Fig. 2 is'. a longitudinal section through the holder, some parts being shown in ele- `vation and other parts broken away.

Fig. 3 is a face fview of -the onthe handle shank. V-

Fig. 4 is a faceview of the jaw mounted on the spring.

Referring to the drawing, there is shown i. a shank 1 which may be conveniently made of metal such as iron or steel and is prefv erably made in the formof a fiat strip of suitable length, a piece of flat bar iron, or

specification of Letters latent. .Patented Aug'. 19, 1919. .Application iiled December 9, 1918. Serial No.' 265,945.

steel, of appropriate fwidthvand length being `customarily employed, although the shank may be otherwise formed.

vAt the base end of theshank there is secured theretoor formed thereonV a handle extension 2 .with a gripping member 3 form- Iing a sheath therefor. The member 3 may -be made of wood or other suitable material of a non-conducting nature forI the current to employed vand also having heat insulating properties so that heat conducted along Vthe shank in the operation of the -tool will. not reach the hand of the o-perator grasping the handle sheath or gripping member 3, which. gripping member may be tubular throughout. An electricconductor @l is made fast to the handle portion 2 which is assumed to be made of metal and to l"which 'the shank 1 is made permanently fast. l

Secured to the shank 1 near the handle 2 is one end of a leaf spring 5 which may be of a width corresponding lto the shank 1,

vreturn bend 7 the sprin has a continuation i @.normally bent away? or ashort distance from the shank 1. At anintermediate point about midway of the length of the fiat por-l tion 8 apost 10 is made fast to' `the shank 1- although such particular `structure is' not obligator The spring 5 is made fast to sol and proJects through a ypassage 11 in the spring, thepost serving to an extentl asa guide for the spring. Pivotally connected to the end of the post 10 remote from the shank lis .a lever 12 extending from a point vpartially overhanging the handle sheath 3 to a point close to the outer end of the spring A 5 where the lever 12has a longitudinally eX- jalw mounted v f screw 14 also traversing the spring 5, the

tended \slot.13 therethrough traversed by a head of the screw being suiiiciently larger than the slot 13 -in one direction to permit 105 a limited relative movement between the spring and lever, while the shank of the screw is of less diameter thanv the extent of the s lot l'lengthwise of thelever.

The screw 14 carries on thel side of the 110 spring 8 toward the 4shank 1 a block 15v with t -shallow and the notc e face remote from the spring traversed by yradial grooves 16. The screw 14 serves as. a` retaining means for the block 15 and holds it firmly and snugly but not too firmly to revent rotation of the block 15 under su cient force.

Fast to the shank 1 in opposition to the block 15 is another block 17 held to the shank by a screw 18 so as to be capable of rotation under sufficient force. 17 is formed with a cylindrical flange 19 about its edge and this flange is provlded with a circular series of notches 20. The block 15' is of a size approaching the inner diameter of the flange 19 so that'the block will enter the fiange when the spring 5 is 1n its nearest approach to the shank 1. The number of grooves 16 and notches 20 agree andthe two blocks 15 and 17 constitute opposed gripping jaws so that when the jaws are suitably shaped a rod electrode 21,1nay be introducedbetween them and seated in the diametrically opposed notches 20 and inl opposed radial grooves 16, whereby the rod 21 is firmly gripped in the holder. Since both jaws are capable of rotation under suitable force the electrode 21 may be laced in various relations `to the holder to acilitate the use of the electrode in arc welding, the range of adjustment of the. electrode including the greater part of a circle. The two jaws'may readily be made tight enough in their connections with the shank `1 and spring 5 to prevent accidental movement under the conditions of use and yet permit intended movements for adjustf ment.

connection with the spring 5 has a handle` 22 of wood or some other suitable material vwhich is both a heat and an electrical insulator. By making the ooves 16 Vrelatively s 20 considerably deeper than the grooves 16 the jaw 15 mag 'be' rmly secured -to the spring 5, in whic case, when it is desired to adjust the electrode into different angular positions with respect to thelength of the holder, the handle 22 is moved toward the handle 3 and the electrode 21 may be easil moved from one angular position to anot er, the angular positions, however, being determined by the number of opposed grooves 16. If the jaws be somounted as to rotate then any angular osition may be obtained. The sprlng 5 as a normal tendency to seat the body 15 in the-jaw 17 and the strength of the spring is such as to firmly-hold the electrode 21 against movement either longitudi- 1 nall or circularly under ordinary working con ltions.

What is claimed is 1'. An electric welding tool comprising a handle, a shank carrie by and projecting The block` from' the' handle, a spring extending along the shank and fast at the handle end thereof and at the other end -tending-.-toward the. shank, coacting jaws on the outer end of the shank and corresponding end of the spring for holding an electrode, and means for moving the spring in opposition to its normal tendency.

2. IAn electric welding tool comprising a handle, a shank carried by and projecting from the handle, a spring extending along the shank and fast at the handle-end thereof and at the other end tending toward the and fast to the handle end thereof with the. other end of the spring tending toward the coresponding end of the shank, electrode receiving and holding jaws on the shank and spring respectively, and a lever'mounted on the shank and connected at one end to the outer end of the spring and having its other end provided with a handle adjacent to the handle of the electrode holder.

4. An electric welding tool comprising a shank, a handle. at one end of the shank, an electrode-holding jaw at the other end of the shank, a post intermediate of the length of the shank, a leaf springr fast tov the shank near its handle, end and .trav- -azir lico..

ersed by the post, an electrode-engaging jaw carried by the spring in opposition to the jaw on the shank, and a lever mounted on 'the post and connected at one en'd to the outer end of the spring and at the other end provided with a handle associated with the handle on the shank. f

5. An electric welding tool comprisingfa'- shank, a handle at one end of the shank, an electrode-holding jaw at the other end of the shank, a postintermediate ofthe length of the shank, a leaf spring fast to the shank. near its handle end. and -traversed by the post, an -electrode-emgaging jaw carried by the spring in opposition to the jaw on the shank, and a lever mounted on the post and connected at one end to the outer end of the spring and at the other end provided with a handle associated with the handle on the shank, the jaw on the shank having a circular series of notches and shaped to receive the jaw on-the spring and said aw on the spring having a circular series of notches corresponding in number to those of the first-named jaw.

6. An electric welding tool comprising al electrode-holding jaw at the other end of the shank, a post intermediate of the length of the shank, a leaf spring fast to the shank near its handle end and traversed by the post, ani electrode-engaging jaw carried by the spring in opposition to the jaw on the shank, and a lever mounted on the post and connected at one end to the outer end of the spring and at the other end provided with a handle associated with the handle on the shank, the jaw on the 4shank having a, circular series of notches and shaped to .receive the jaw on the spring and said ]aw on the spring having a circular series of notches corresponding-"in number to those of the first-named jaw, and said jaw on the spring being of a size toenter the jaw on the shank. f

7. An electric welding tool provided with opposed electrode-holding jaws having a.

normal tendency toward each other, said jaws having matching notches for receiving an electrode and rotatable to hold an electrode gripped between them in different angular positions with respect to the longitudinal axis of the welding tool.

8. An electric wel-ding tool comprising a shank, a handle, a leaf spring fast at one end to the shank and provided at an intermediate point with a return bend, and opposed j'aws carried by the shank and spring for gripping an electrode between them.

In testimony that we claim the foregoing as our own, we have rhereto atlixeld our signatures.

JOHN K. BAKER. THOMAS E. MoGUI-RE. Witnesses:

ADAM SCHADE CHARLES H.