US1240901A - Electric welding-tool. - Google Patents

Description

Patented Sept. 25, 1917.

2 SHEETS-SHEET l.

ATTO RN EY W. E. 'SYMONS.

ELECTRIC WELDING TOOL.

APPLICATION FILED MAY 22. IIIII..

WITN ESSES W. E. SYMONS.

ELECTRIC WELDING TOOL.

APPLlcATmN FILED MAY22,19|7.

Patented Sept. 25, 1917.

2 SHEETS-SHEET 2.

WZZSMETJ my gum/ENTOR/l WITN ESSES ATTO R N EY WILSON E. SYMONS, OF NEW YORK, N. Y.

ELECTRIC WELDING-TOOL.

Specification of Letters Patent.

Patented Sept. 25, 191 *7.

Application led May 22, 1917. Serial No. 170,221.

To all whom it may concern:

Be it known that I, VVi'LsoN E. SYMoNs, a citizen of the United States, residing at New York, in the county of New York and State of New York, -have invented a new and useful Electric Welding-Tool, of which the following is a specification.

This invention has reference to electric welding tools for use in connection with arc welding, and its object is toprovide a tool for the purpose of convenient form for handling and provided with means wlthin convenient reach of the operator fordistant control, and also provided with means for the ready placing of the tool-carried electrode in different positions with reference to the tool itself.

In accordance with the invention the electrode holder has a pistol-grip handle of hollow construction in which the terminal portions of electric conductors may be conveniently housed, with the pistol-grip portion of the tool provided with an electric switch so arranged as to be manipulated by the hand grasping the tool' without the necessity of loosening the grip of the hand on the tool. Furthermore, the invention comprises means for setting the electrode into different angular relations to the body of the tool and firmly holding it in`such relations, thus contributing materially to the scope of use of the tool. i

The invention will be best understood from a considerationl of the following detailed description, taken in connection with the accompanying drawings forming part of thisV specification, with the further understanding that while the drawings show a` practical form -of the invention, the latter is not confined to any strict conformity with the showing of the drawings, but may be changed and modified so long as such changes and modifications come within the scope of the appended claims.` In the drawings :f- Y Figure 1 is a side levationv of an electric welding tool embodying the invention. V

Fig. 2 is a longitudinal section of the tool `shown in Fig. 1, but :drawn on a larger scale.

Fig. .3 is a section on. the line 3-3 of Fig. .2.

Fig. V4iis an elevation of thelelectrode holding end of the tool, distant parts being omitted.

F 5 is a section on the line 5-5 of Fig. 2, dlstant parts being omitted, and the figure being drawn on a larger scale than Fig. 2. f

Fig. 6 is a longitudinal section of the electrode holding end of the tool on the Fig. l0 is a section on the line 10*10 of Fig. 9. l

Fig. 1l is a section on the line 11--11 of Fig. 2. l

Referring to the drawings there is shown a hollow casting l formed of two members 2, 3, respectively, united at one end, and there merging into a neck 4 externally screw-threaded and provided with a screw cap 5 having an opening 6 for the passage of conductors 7, 8, respectively. The cap 5 is provided with packing 9 for firmly holding the conductors, one of which, the conductor 7, is a large conductor for carrying heavy currents, and the other conductors 8 are smaller conductors, since their purpose is merely to carry current for distant control, as will hereinafter appear. The two branches 2 and 3 join at the end remote from the neck 4 in a body portion 10, which in turn is continued in the form of a barrel, the whole structure being. somewhat similar in appearance to a pistol and the hollow branch 2 having a relation to the body member l0 and barrel 11 of the handhold of a pistol tothe barrel of the pistol, so that the branch 2 is in eiiect a pistol grip, which greatly facilitates the control of the,

-tool in use and permits handling of 'it withneath the depression 14 and 14a is a thickened part 15 on which is lodged a support 16 which may be made of insulating material, and

which is provided with a channel 17. At

the ends of the channel there are secured contact members 18 to which two of the conductors 8 are connected. In the channel there is mounted a rock member 19 upon a bolt or other support 20 and having its ends in such relation to the contacts 18 as to engage one or the other as the member 19 is rocked. Buttons 21 of insulating material provided with heads 22 extend through suitable passages in the bottom of the depressed portio'ns 14, 14l and engage the rock member 19. Springs 23 on the buttons 21 `serve to hold the rock member in a neutral position out ofcontact with each of the members 18. The third one of the conductors 8 is connected to the rock member 19 and may be considered as the return conductor, the other two conductors 8, as well as the return conductor, being carried to a distant point of control, so that when one button 21 is depressed, a certain current is fed to the conductor 7 and when the other button 21 is depressed another current is fed to the conductor 7, whereby thewelding current is correspondingly buried. By housing the buttons 21 in a depression in the branch 2 constituting the pistol grip of the tool they are within easy reach ofthe thumb or finger of the operatonwho need not remove his hand from the tool in order to properly control the current.

TheJ barrel 11 at 'the end remote fromvthe body 10 is entered by the threaded end of a tubular extension 24, this tubular extension abutting within the barrel 11 against a seated washer 25, which latter may be of insulating material. That end of the tubular member 24 remote from the barrel 11 is eX- panded into a receptacle 26 initially threaded to receive the threaded stem 27 of a bell'- head 28 of insulating material and and also through the barrel 11 is a rod 34' ending within the head 28 in an eye 35 in the construction shown in Figs. 2 and 3 and in a hook 36 in the'construction shown in Fig. 6, the inner Wall of the hook being roughened or toothed, as shown at 37, and arranged at an angle to the length of the rod 34. The en d of the rod 34 remote from the eye or hook, which latter constitutes a clamping member for an electrode rod 38, has secured thereto a block 39 by means of screws 40 or in any other appropriate manner. Between the block 39 and the Washer 25 the rod is surrounded by a spring 41 tending at all times to draw the holding member 35 or 36, as the case may be, against the electrode 38, with the latter seated in the recesses or sockets 31 or 32, as the case may be. The block 39 receives that end of the conductor 7 which is contained within the body 10 of the tool, the conductor being long enough for the purpose, and is held to the block 39 by screws 42 or in any other appropriate way. V

There is also a link 43 within the body member 10, which link is made fast to the block 39 by screws 44, or in any other appropriate way, lthe link being electrically insulated from the block 39 by insulating material 45 separating the screws 44 from 95 the link 43. The handle branch 2 adjacent to its union with the body member 10 is formed with ears 46 on opposite sides of-a slot 47 leadinginto the space between the two branches 2 and 3. The'ears 46 carry a pivot pin 48 on which is mounted a trigger 49 having a finger piece within the space between the two branches 1 and 2 and an arm 50 within the handle branch 2. The link 43 has a fiattened extension 51 pivoted to the arm 50, which latter may be split to have the flattened extension 51 lodged in the split portion of the arm 50. In this way the operator grasping the handle member 2 may readily manipulate the trigger 49 without removing the hand from the tool to move the rod 34 against the normal tendency of the spring 41, such movement of the rod releasing the grip ofthe eye 35 or hook -36 upon the electrode 38. In order to support the block 39 it is mounted upon a strip 52 of 'insulating material in turn mounted in the body lO'in a dovetail recess or in any other suitable manner. 4

When the electrodefrod 38 is lodged in the recesses or socketsv 31 which are located diametrically opposite each other, the rod is supportedvin the longitudinal` plane ofl the barrel 11 and handle portion 1 of the tool, the rod being perpendicular to the 1on- A gitudinal axis of the tool. If the rod 38 be loosened 4and then moved to one side or the other of 'the position it occupies in the rccesses 31 and is lodged in one or the other of the recesses or sockets 32, then the rod is 58 to receive the conductors 7 and 8.

tilted forwardly or rearwardly, since there is but one recess 32 for either position of the rod 38 on opposite sides of the recesses 31. The rod 38 engages the outer edge of the flange 30`on one side of lthe longitudinal axis of the tool and is seated in a recess 32 on the other side of the longitudinal axis of the tool, so that the rod is given an angular position sidewise with respect to the position of the rod 32 when seated in the recesses 31 and at the same time is given a forward or rearward pitch.

Experience has shown that for all ordinary uses the three positions provided for are sufficient. Of course by increasing the number of recesses in the flange 30 and differently locating these recesses, other angular positions may be attained.

The lock nut 5 is a' convenient way of holding the conductors in fixed relation to the tool where entering the casting 1, but there is a liability of breaking the neck 4 because of the extent of projection in order to carry the nut 5. To reduce the length of the neck 4 or even to completely obliterate it and still firmly hold the conductors, the arrangements of Figs. 7 to 10 may be provided. In Figs. 7 and 8 there is a'short neck 53 through which the conductors 7 and 8 are passed, and this neck carries a set screw 54 engaging a bearing and clamp plate 55 within the neck, thus crowding the conductors 7 and 8 together in a manner to hold' them against accidental displacement.

In the structure of Figs. 9 and 10 the neck 4 or 53 is entirely omitted. A clamp block 56 is cast in the handle portion and the latter is provided with a passage 57 leading into the handle portion adjacent to 'theblock 56, which latter is formed with grooves movable clamp block 59 'is located in the handle portion and is urged by a screw 60 into engagement with the conductors 7 and 8 forcing them into firm engagement with the block 56 and thereby clamping them againstl displacement.

There are'certain featuresv of the welding tool, such as the pistol grip, and some other parts, which 'are shown, described and claimed in another application filed by me on February 21, 1917, No. 150,095, for an electric welding tool, and hence those fea- 'tures which are -common to both applicaa handle portion, an electrode holder provided with seats for an electrode in different angular relations to each other, and clamp` ing means for the electrode having a normal tendency to clamp the electrode to any chosen ones of the seats.

2. An electric welding tool provided with a handle portion and an electrode holder having a series of electrode seats arranged circumferentially of the longitudinal axis of the holder, and clamping means movable lengthwise of the holder for forcing the electrode in any chosen ones of the seats.

3. An electric welding tool provided with a handle portion, an electrode holder on the handle portion having a series of electrode seats arranged circumferentiallyvof the longitudinal axis of the tool, and clamping means for holding the electrode in any chosen ones of the seats, said clamping means being provided with means for imparting to it a normal tendency toward the electrode clamping position.

4. An electric welding tool provided with an electrode holder having a hollow head with a terminal flange, a series of seats in the flange arranged circumferentially of the longitudinal axis of the tool, and clamping means for the electrode for maintaining the latter in any chosen ones of the seats.

5. An electric welding tool provided with an electrode holder having a hollow head with a terminal flange, a series of seats in the flange arranged circumferentially of the longitudinal axis of the tool, and clamping means for the electrode for maintaining the latter in any chosen ones of the seats, certain of the seats being arranged diametrically of the longitudinal axis of the holder and others of the seats being arranged on opposite sides of the first-named seats.

6. An electric welding tool provided with an electrode holderhaving a hollow head with a terminal flange, a series of seats in the flange arranged circumferentially of theA outer end of the electrode holder to impart a rearward tilt to the electrode when lodged therein.

l7. An electric welding tool comprising a handle portion with a barrel projecting therefrom, an open ended hollow head beyond the barrel portion and provided with seats at its outer end for an electrode, a rod extending through the barrel and into the head and there terminating in an electrode engaging member, a spring on the rod within the barrel` having a normal tendency to move the rod away from the head to clamp the electrode in the head, and a manipulating member for the head at the handle portion within reach of the finger of a hand gripping the handle portion to release the electrode by the movement of the member to propel the rod in opposition to the spring.

8. f,An electric welding tool comprising a handle portion with a barrel projecting therefrom, an open ended hollow head beyond the barrel portion and provided with seats at its outer end for an electrode, a rod extending through the barrel and into the head and there terminating in an electrode engaging member, and a spring on the rod Within the barrel having a normal tendency to move the rod away from the head te clamp the electrode in the head, and a manipulating member for the head at the handle portion within reach of the linger of a hand gripping the handle portion to release the electrode by the movement of the member to propel the rod in opposition to the spring, the head being provided with a series of seats for the electrode arranged circumferentially of the ylongitudinal axis of the tool.

9.1An electric welding tool comprising a handle member of pistol-grip conformation, a barrel member extending therefrom and provided with a head beyond the outer end of the barrel member with said head formed with seats for an electrode rod arranged c ircumferentially of the longitudinal axis of the barrel, a rod extending through the barrel and into the head and there formed to grip the electrode and hold it in chosen ones of the seats, a conducting block` carrying the rod within the barrel and having means for the attachment of an electric conductorthereto, a spring on the rod within the barrel engaging the head and imparting to the rod a normal tendency to clamp the elec-v trode in a chosen position in the head, and

lin different positions inthe electrode holder,

a manipulating means for the electrode clamping means having an operating portion in the handle part of the tool, and an electric switch for distant control of current fed to the tool and .located in the handle portion on the face ofthe pistol grip remote from the manipulating means.

11. An electric weldmg tool provided with a pistol grip handle, an electrode holder projecting from the handle, and an electricswitch for distant control of current fed to an electrode in the holder, comprising a rock contact member within the handle, other contacts in the path of the rock contact member and also within the handle,

the joined ends, and holding means for electric conductors entering the handle portion and extending into the two hollow members thereof, said hollow portion having means at the conductor-entering part for clamping the conductors against accidental displacement where entering the handle.

13. An electricwelding tool provided with a handlel portion comprising two spaced hollow members joined at the ends, an electrode holder projecting from one of the joined ends, and holding means for electric conductors entering the handle portion and extending into the two hollow members thereof, said hollow portion having means at the conductor-entering part for clamping the conductors against accidental displace.

ment where entering the handle, said handle portion being provided with an electric switch in that member of the handle portion constituting the gripping member with the switch having manipulating devices extending to the exterior thereof and the handle portion where traversed by the switch manipulating devices being exteriorly depressed for locating the manipulating devices in their normal positions within the contour line of the handle.

14. An electric welding tool comprising a hollow handle portionl of pistol grip and guard conformation with the grip and guard united at one end and there provided with an entrance for electric conductors, and means for clamping the electric conductors against accidental displacement and also joined at the other end, a barrel constituting a continuation of the handle portion, a removable face plate for exposing the interior of the body of the tool, an electric switch housed within the handle portion and having manipulating members sunken into the handle portion within the contour line thereof, an electrode holder projecting from the barrel portion and provided with'seats for the electrode in different angular positions circumfereitially of the electrode holder about the longitudinal axis of the tool, and clamping means for the electrode having a normal tendency toward the In testimony that I claim the foregoing clamping position andy provided with vInaas my oyvn, I have hereto'afixed my signanipulating means in the handle portion proture in the presence of twowitnesses.

jecting into the space between the pistol ',WILSON E. SYMONS. 5 grip and guard, said pistol grip and guard Witnesses: also forming conduits for the electric con- THOMAS M. FLANAGAN,

ductors entering the tool. ANDREW GORHAM.

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