Combination cutting and welding tcrch

Abstract

Claims

July 3, 1923. A. -F. JENKINS COMBINATION CUTTING AND WELDING TORCH 7 Filed Aug. 11, 1919 Patented July 3, 1923. UNITED STATES ALEXANDER F. JENKINS, OF BALTIMORE, MARYLAND. COMBINATION CUTTING AND WELDING TORCH. Application flied August 11, 1919. To all whom it may concern: Be it known that I, ALEXANDER F. JEN- KiNs, a citizen of the United States, and resident of Baltimore, State of Maryland, have invented certain new and useful Improvemerits in Combination Cutting and \Veld' ing Torches, of which the following is a specification. It is the object of this invention to improve the construction of oxy-aoetylene torches for welding and cutting metals, b the provision of a new and improved quic releasable gas valve controlling the supply of cutting oxygen to the tip and by the provision of an improved joint between the head of the torch nd the removable tip. The precise nature of the invention will be fully disclosed in the following description when taken in connection with the accompanying drawings in which: I Figure 1. is a side elevation of a torch, part of the handle being broken away to show the cutting jet valve; Figure 2 is a disassembled view of the head and tip, the tip being shown in section; Figure 3 is a. section along the line 3--3 of Figure 1; and Figure 4 is a section through the valve controlling the flow of gas to the rotting jet showing the valve in its open position. The torch is, in general. of the usual construction in which three pipes 14), 11 and 12 for cutting oxygen, oxygen for the heating jet, and the acetylene gas respectively, connect the head 13 to the rear block 14. A. tubular handle 15 surrounds and is supported hy these pipes and the block l4. The valves lti and 17 control the How of oxygen and acetylene respectively from storage tanks to the torch in the well known manner, and self-closing valve is located at a convenient point along thr hipc 1U conveying the Putting oxygen to the tip. This selfclosing vulvc cornprisrs,u \?ll\'( casing 18 containing n cylindrical valve lJ normally [)li\f-"l upuniilly to its (-losi-il position by :1 spring i l. \ulvc .Sll'lll 2i Hl' 'lllell to the \':|l\iprop-it unlu'ilr lly through the Cusin! IN. l1 irc-sing upon thi- (ml of stem 2| thi- \nlw ll may he opened against the pres ure ol tho spring 2' and when the exli'l'lH! |Jl'l' f-llli' i r 'niovoil till piing El :uiloiiinlirnll returns th \':il\'iil to it\ H'll, lh||--. iiitrrruplinL' liu llou f cutting jet oxygen llllilllf 'l ill ill'! i Pivotully mumiwi ill 2'. lo lllL' valve Serial No. 316,840. casing 18 is a lever 23 which extends rear Wardly directly over the valve stem 21, and i adapted to operate the stem when moved by pressure of the finger. Slidably connect ed to the free end of the lever 23 is a. buts ton 24 having a catch 25. The button is adapted to be moved back and forth throu h a limited distance along the lever 23 b e thumb or finger of the operator 0 torch, thus engaging or diseng the catch 25 with the handle 15 which is s ottedto receive the lever 23, and the end wall 26 of the slot servingas a stop for the latch 25. In Figure 1 the lever 23 is shown raised, the valve 19 closed, and the supply of oxygen to the cutting jet cut ofi. In Figure 4 the lever 23 is shown depressed and the valve 19 open, so that Cutting oxygen is passing to the tip. The latch 25 is shown can ht under the stop 26 to hold the valve in t is position in which it will remain until the operator slides the button 24 forward along the lever to disengage the members 25 and 26. By this arrangement of arts it will be seen that the oxygen supplie to the cutting jet is controlled by a quick release valve operating mechanism b means of which the valve may be opene and permitted to remain open for any desired len h of time but which may be instantly osed by a. simple movement of the thumb or finger of the operator when it is desired to cut oil the supply of cutting oxygen. An opening 15 in the handle 15 is aligned with the removable cap 27 of the valve in order that the working part of the valve may he removed. This is an advantageous feature, as these valves are subjected to considerable wear in the operation of the device and the replacement of parts is not infrequently necessary. At their forward ends the pipes 10, 11 and 12 connect respectively with conduits through the head 13 which have their forward ends at various points in the conical seating surfa t- 28 of the head. This coni- (:ll seating surfaci- 2H cooperates with an intcrnul c nical scaling surface 29 of the Fl|('l\'l'l((l tip and, when the head and tip are wr-ili'ilv held together by means of the coupling not ll), a gas-tight joint is made be- 1h howl and tip. Annular grooves 31 llll l 1: in \he howl register with annular Q'l' UYCS -S :uul 4 in the tip, and the annular :i-:i; s lllll lril'lXlHl when the head and tip are together. communicate with one or more the. longitudinal passages 35 in the tip. The oxygen and the acetylene from pipes 11 and 12 reepeotively are led into the annular passagee formed by the registering grooves .rl, 33 and 3%. One of these annular passages cornmunicatee directly with the passage and the other by a branch pas- 35 and the mixing of the two cases to form the heatin mixture takes place in the lower part the paeeage of the tip. The cutting oxygen pleases through a central conduit, 36 of the tip which communi cates with the central conduit passage through the head and connected to pipe 10. The use of tapered conical surfaces having registering annular grooves, as above described. has heretofore been suggested but in said cases the head has been sockets inbllfiihi of the tip. The resent construction has several important a vantagee'over these previous constructions. A number of tips are usually provided with each. torch and in changing them the extra tips are often not protected but are roughly handled and the seating surfaces injured if exposed. By providing the tips with internal conical seating surfaces this trouble is obviated. lt loin been found that in use there is much less danger of the seating surface of the bead bcroniing bruised than of the tips. The tip is also free to expand and contract as the torch heals and cools without breaking the sealing joint between the annular passages as sometimes happens when the tip is provided with the external seuting'surfew. The torch described is simple, compact and conveniently gperable, not easily injured by rough han ing and is a thorou hlv practical structure in every respect. -arioue details of construction may, of course, be modified and I do not limit myself to the exact embodiment of the invention dis- Ulfified. What is claimed is: 1. In a torch of the class described, eonduits for gases including a conduit for cut/ ting oxygen, a valve movable transversely of the handle for controlling the passage of fluid through said conduit. said valve havto tie pivoted 1e Mr and provided with a latch. said valve stem bearing against the lever at a point intermediate its pivotal axis and said button and a tubular handle surrounding the gas conduits and said valve, the handle being slotted for the pivoted lever and the end wall of the slot serving as a catch for the latch secured to the button. torch having; a hollow cylindrical handle portion provided with an. opening in its wall. a has conduit extending throu h said handle, a valve casing in said han le having a removable cap, a valve in said casin, for controlling the liovv of gas through said cullllllil said valve being, adapted to be withdrawn when the cap has been removed, and the valve casing being positioned with the removable cap adjacent the opening in the handle, for the purpose set, forth. 5;, A t rch having a hollow handle por tion provided with a relatively small opening in its wall, a gas conduit within said hflnllllf, fuggases under pressure, means for controlling the flow of gas through said conduit comprising a valve casing with a gas passage tlu-rethrough having an enlarged portion constituting a valve chamber, a removable rap for said valve chamber positioned adjacent to and accessible through the opening in the handle, a valve in the valve chamber, and a valve stem connected to the valve and extending through the valve casing, the \ulvc and stem being rcinovable from the caning through the opening in the handle when the cap has been detached. in tce'timon \vhercofl :illix mv si nature. . AL lXANDER r. JEN] INS.

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