US715862A - Spring pulling-hook for use in butt-welding. - Google Patents

Description

No. 75.862. v Patented Dec. l6, I902. v E. E. uumav.

SPRING PULLING HOOK FOR USE IN BUTT WELDING.

(Lpglimtion-filed Oct. 29,. 1901; Renewod July as, 1002.)

um mm.)

UNITED! STAT- Es PATENT EDWARD E. QUIMBY, O'F ORANGE, NEW JERSEY, ASSIGNOR TO NATIONAL TUBE COMPANY, OFPITTSBURG, PENNSYLVANIA, OORRORATION OF NEW JERSEY.

SPRING PUL II ING-HOOK FOR uss INBlJTT-WELDING.

SPECIFICATION forming part of Letters l atent N0. 71 5,862,dated December 16, 1902.

ApplicationflledOctober 25,1901. Renewed July 23, 1902. Serial 1101 116,621. (No model.)

To otZZ whoynit-wqay concern-r Thisbroad'feature of't-h'e invention is sus- Be it known that L'EDWARDE. QUIMBY, of ceptible of application to' any pulling instru- Orange, NewJersey, have invented a certain mentality adapted at itsn'car end to engage new and useful Improvement in Spring Pullthe reins of the tongs-or like tooland pro- 5 ing-Hooks for Usein B utt-Welding',"of which vi ded at its forward end with suitable means the following is a specification. for connection with the draw-chain or other In butt-welding as now practiced when thedrawing mechanism. tube-blank in the form of a flat plate lying The inventionis herein illustrated in conin the furnace has been heated to the proper nection'with an ordinary draw-chain and is to condition the forward-end is grasped by the shown as a single-pronged pulling-hook projaws of tongs the reins of which are adapted vided at its forward end with laterally-proto extend through a hollow flaring die, called jecting wings adapted to-travel on the drawthe welding-bell, and tobe connected with bench on either side of the slot in which the a pulling-hook which at the proper time is draw chain'moves, and hence susceptible of 15 dropped into engagement with a continuemployment in eifecting the disengagement ously-running draw-chain. At th einstantofof the hook and'draw-chainfrom each other such engagement the'tongs are subjected to at the desired stage in the pulling-excursion a sudden jerk, which, ifthe draw-chain is of the hook, as hereinafter pointed out. running too rapidly, 1nay cause them to slip The accompanying drawings of a single- 20 their hold on the plate in the furnace or-per--. pronged pulling-hookembodying an illustrahaps to break off the front portion of the plate tion of the present invention are as follows: before they can overcome the static inertia of Figure 1 is a side elevation of the pullingthe plate. There is thus, imposed upon the hook, showing a portion .of a draw-chain in draw-chain such alimitationin' speed as will longitudinal vertical section." Fig. 2 is an 2 5 insure the continuedrgrasp of the tongs upon elevation oftheprongedendof the pullingthe plate at the instant of starting the plat e. hookshownin Fig. 1. Fig. 3 is a transverse out of the furnaceand also at the instant of vertical section taken through the plane inthe first impact of the, forward end of the; ld'icated by the dotted lin'ea: noon Fig. 1, showplate against the welding-bell. The pullings ing'the ordinary method: of construction for 0 hook heretofore used is a rigid object, and enabling the rear endof the hook to engage hence at the instant of its engagement with the reins of the tongs. Fig. 4 is an elevation Ihe draw-chain-there is a sudden shock adsimilar to Fig. 1, butshowing the pullingministered to the plate which, under present hook extended in its operative position with conditions, must be instantly started into its rear end holdingthe reins of the songs and 5 motion with a speed corresponding to whatits pronged end in engagement'with a link of ever may be the speed of the draw-chain. the draw-chain. Fig; 5 is aside elevation of The object of the present invention is to the pronged end of the pulling-hook and the diminish the shock upon the plate or other bi-ght'of the draw-chain distant'from th'efurtube-blank at the instant when the pullingnace, showing the mannerinwhich the diso hook is first engaged with the draw-chain or tant bight of the draw-chain rides clear of other drawingmechani'sm and also to diminthe prong a at the end of the pulling ex'cur- 9o ish the shock of the. impact of the forward sion of the hook. end of the blank'against the welding-bell. The drawings show a pulling-hook A, ap-

To that end the invention consists, broadly, proximating the shape of a C-spring. The

45 of a pulling instrumentality which is extenrear leg A of the spring is bifurcated, and

sible and resilient and which is equipped with thus presents the usual channel A for ada stop for so limiting the range of its extenmitting the reins B of the tongs, which in sibility that a rigid pull will be exerted upon operation are prevented from dropping out 1 the tongs during the butt-welding operation. of the channel A by the bearing of their collars b upon the usual inclined ofisets A A The forward leg 0. of the pulling-hook, which is provided with the usual curved prong a, is also provided with the lateral Wings a a which are adapted to bear upon the top of the draw-bench O on opposite sides of the.

slot in which the draw-chain 0 travels and by such bearing cause the forward bight C of the draw-chain to ride clear of the prong a, as illustrated in Fig. 5, and thus permit the manual removal of the pulling-hook. In operation the legs A and a of the pulling hook are sprung apart by the strain to which they are subjected, and this pulling apart is herein referred to as extensibility.

The pulling-hook is shaped and proportioned in its cross-section with reference to giving it resilient strength sufficient to enable it to overcome the static inertia of the plate in the furnace and pull the plate forward to the welding-bell. It is preferred that the pull shall be rigid and unyielding after the work has encountered the resistance of the welding-bell, and to that end the pullinghook is equipped with a suitable tying instrumentality so organized as to limit to a prescribed extent the range of extensibility of the pulling-hook. A simple expedient for the purpose, which is illustrated in the drawings, consists of a tie-bar D, loosely inserted through the apertures 01 and d in the legs A and a of the pulling-hook. The tie-bar is provided, preferably at its forward end, with the head D, preferably rounded upon its inner side for adapting it to bear upon the forward side of the leg at. The rear end portion of the tie-bar is provided with the screwlhread E for engaging the jam-nuts e e, the nut 6 being rounded upon its forward side to adapt it to bear upon the rear side of the leg A. The distance between the nut e and the rear side of the leg A, as represented in Fig. 1, determines the range of extensibility of the hook. In Fig. 4 the legs are shown as tied by the bearing of the jam-nut e and the head D against the legs A and (1., respectively, such being the position assumed during the butt-welding operation.

It will be seen that the features of extensibility and resilience may be employed in the construction of a pulling-hook provided with two prongs, as shown and described in United States Patent No. 672,914, and that the fea' ture of side wings on the single-pronged hook permits the use of a tripping-switch arranged above the draw-chain for acting like that shown in said Patent No. 672,914 in automatically lifting the pulling-hook from the drawchain at a predetermined stage in the path of travel of the pulling-hook.

\Vhat is claimed as the invention is 1. In butt-welding apparatus, the combination of the drawing mechanism and pullingtongs with an extensible and resilient pullinghook having its rear end adapted for holding the reins of said tongs; its forward end pronged for engaging said drawing mechanism, and provided with a tying instrumentality for limiting its range of extensibility.

2. In butt-welding apparatus, in combination with the drawing mechanism and pulling-tongs, an extensible and resilient pullinghook having its rear end adapted for bold ing the reins of said tongs; its forward end pronged for engaging said drawing mechanism and provided with an adjustable tying instrulnentality for varying its permitted range of extensibility.

3. In the art of butt-welding, an extensible and resilient pulling-hook adapted at its rear end for holding the reins of the pulling-tongs and provided at its forward end with a single prong and with laterally-projecting wings for bearing upon the top of the draw-bench.

4. In apparatus for butt-welding, the combination of the drawing mechanism and pulling-tongs with an extensible and resilient pulling-hook adapted at its rear end for holding the reins of said tongs and adapted at its front end for engagement with said drawing mechanism.

5. In apparatus for butt-welding, the combination with drawing mechanism, of tongs for engaging the blank to be drawn into tubing, and an extensible and resilient pullinghook adapted at its rear end for engagement with the tongs and being provided at its forward end with means for engaging the drawing mechanism and with laterally-projecting wings for hearing on the top of the draw-bench.

EDW. E. QUIMBY.

Witnesses:

E. GATTERER, A. M. JONES.

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