US2393830A - Electrode holder - Google Patents

Description

A. H. SMITH ELECTRODE HOLDER Filed Jan. si, 1944 Jan. 29, 1946.

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Patented Jan. 29, 1946 uNlTEosrATEs PATENT OFFICE m'om..

Application 31.(4;.le r;a)llno. 520,441 y My invention relates to electrode holders of the general character shown in my Patent No. 2,150,464. issued March 14, 1939. However, an important object'oi the present construction is to provide an electrode holder of simpler con` struction. I

Another object is to provide iin-electrode holder that will ilrmly maintain an electrode in any of a variety of angles during welding.

A further object is to provide in an electrode .holder a quickly replaceable tip for holding electrodes.

In the drawing, like reference characters designate similar parts in the several views.

Fig. 1 is a longitudinal section oi' an electrode holder, partly in elevation, embodying the toregoing objects.

Fig. 2 is an enlarged side elevation of the tip of the holder, looking in the direction oi' the arrow A of Fig. l.

Fig. 3 is a transverse section taken on the line 3-3 o! Fig. 1.

Fig; 4 is a broken, longitudinal section taken at 90 from Fig. 1. l

Fig. 5 is a broken elevation, showing a modiiled construction. l

Referring more in detail to the drawing, the reference numeral 6 indicates a tubular, insulating handle for my present electrode holder. A cylindrical conductive bushing 1 is arranged with in the handle 6. A binding post 3 at the end oi the bushing 1 provides suitable means for connecting with a wire 8 insulated as shown at III. A plate I2 is disposed to clamp the end of the wire 3 to the bushing 1, and a nut I3 yon the binding post 8 in turn clamps the plate in said position.

A pin I4 spans the space within the cylindrical bushing 1. A fibre or other non-conductive disc I5 rests against the pin I4, while a second bre, insulating disc AI3 is disposed opposite the disc I5 with a coil spring I1 arranged between, and abutting, the discs I5 and I3. An insulating sleeve Il within the bushing 1 envelopes the spring I1.

The head I8 oi' the binding post I spaces the bushing 1 from the insulating handle 8 at one end, and an integral collar 23 on a bolt 2i spaces the other end of the bushing 1 from the handle 3. The head 22 of the bolt 2l is accessible from the exterior through an opening 23 in the handle 6. The head 22 is of reduced diameter, relative to the collar 2li. The bolt 2i is screwed into the bushing 1 to hold sainey in place.

The bushing 1 has a slot 24 in which reciprocates a cross-head. The crossihead is connected with a rod 26 by armsl 21 arranged around a lever 28 fulcrumed at 23. A grip 30 is fitted on an outer, angular end 3| of the lever 28.

The rod 26 reciprocates in an elongated shell 32. The cylindrical shell 32 is notched laterally, as perhaps best shown in Fig. 2. The notches are in a stepped arrangement, With the upper notch as shown at 33 and the lower notch as suggested at 34. It is to be understood that there are two notches 33 on opposite sides of the shell 32, and that there are two notches 34, one directly opposite the other, in the sides of the shell i 32. A welding rod 35 may rest in the upper notches 33 or in the lower notches 34 (as shown in full lines in Figs. 1 and 2), or in one upper notch and one lower notch (as shown in broken lines in Fig. 1).A The notches 33 and 34 are overhung by points 33 and 31 respectively. to maintain the rod in the notches. 'I'he reciprocating rod 23 is preferably pointed, as shown at 38, to hold the welding rod 35 in the desired notches. The variety of positions of the welding rod 35 makes it convenient to reach diil'erent locations of work.

In the form shown in Fig. 5, any suitable handle (not shown) may be attached to the rod 38. A cap 40 is screwed upon a threaded end 4I of the rod 33. The rod 33 is pointed as suggested at 42. It is believed clear without further illustration that the cap 40 is hollow and contains upper and lower notches, as shown and described in the hereinabove construction. A welding rod 43 is shown in the lower notches of the cap 40.

vIn the operation of my preferred constructions (shown in Figs. 1 to,4 inclusive), the point 38 of the rod 26 is drawn rearward by depressing 'the grip 30 to the broken line position in Flig.1. This movement of the grip 30 is communicated to the rod 28 by the lever- 28 bearing upon the inclined or cam face`44 of the cross-head 23.

Rearward movement (to the right in Fig. 1)

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Intheuseofthemodiiiediormshowninm. 5, the screw cap 40 irputidly unscre'ed iran thethreadedendll ottherodll. Thilunscrelject to modincatiom without departing from the l my inllvithmthomofthelvpmdedcm Hnvinl thusdeneribedmy inventan. what! clsimlnddeliretolerebylmhtenth: Llnnnelectrodeholdmmekngldtubuhr shellhavimnesrtheouterendthereoLalex-ies

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