US710915A - Draw-bench. - Google Patents

Description

Patented Oct. 7, v|902..

H. H. KNIGHT.

DRAW BENCH.

(Applicltion Bled May 13, 1902.1

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H. H. KNIGHT.A

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(No Model.)

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Patented Oct. 7, |902.- H. H. KNIGHT.

DRAW BENCH.

(Application led May 13, 1902.)

3 Sheets-Shut'. 3.

(lo Model.)

wrrNEssEs Unirse STATESA PATENT OFFICE,

HARRY HARVEY KNIGHT, OF KINGS HEATH, NEAR BIRMINGHAM, ENGLAND, ASSIGNOR TO HUDSON BROTHERS, LIMITED, OF KINGS NORTON, NEAR BIRMINGHAM, ENGLAND, A CORPORATION OF GREAT BRITAIN.

D RAW- B E N C H SPECIFICATION forming part of Letters Patent No. 710,915, dated October 7, 1902.

Application filed May 13, 1902. Serial No. 107,151. (No model.)

To all wlwnt it may concern;

De it known that I, HARRY HARVEY KNIGHT, works foreman, a subject of the King of Great Britain, residing at 23 Brook? lyn Villas, Avenue road, Kings Heath, near vBirmingham, England, have invented certain new and useful Improvements Relating to Draw-Benches, of which the following is a specification.

to This invention has relation to the drawbenches or machinery employed in drawing steel and other metallic tubing, and has particular reference to the traveling wagons or trolleys which carry the pliers or grippers for i5 seizing the tagged end ofthe tube to be drawn and the balanced hook or catch which engages with the endless draw-chain of the bench and drags the wagon after it, such wagons being usually employed in connection with a plug-mandrel fixed inside the drawing-die, which is usually mounted at one end of the bench, while the gearing for driving the chain is arranged at the opposite end. In the present method of drawing by this machinery after the tube has been drawn through the die it is released by the grippers and then the wagon has to be dragged back to the die end of the bench by hand, this being usually done by an attendant,\vho 3o is known in the trade as a plier-minder and whose special duty it is to take the wagon back after each draw.

Now the object of this invention is to provide the draw-bench or drawing machinery with automatic or self-acting mechanism for returning the wagon to the die end of the machine immediately7 it becomesY disconnected from the tube, or, in other words, to provide the bench with an automatic plier-minder. 4o Figure l of the accompanying drawings represents in side elevation a draw bench or machine for drawing steel tubes provided with self -acting means for returning the wagon which carries the gripping-pliers to the die end of the machine after the completion of each draw or in the event of the pliers becoming liberated from the tube in consequence of the latter breaking while being drawn or from any other canse. This view shows the positions of the various parts when 5o a tube is in the act of being drawn through the die and the wagon is being traversed along the bench in the direction indicated by the arrow by the pull of the endless traveling chain with which the-draw-hook of the wagon is engaged. Fig. 2 is a similar elevation of the machine to that represented in Eig. l, but shows the positions assumed by the parts should thetubc break and the draw-hook of the wagon become disengaged from the trav- 6o eling chain. Fig. 3 is another elevation showing how the wagon isautomatically returned or drawn back to the die end of the machine by the special means provided for that purpose. Fig. I is a top side plan of the machine, 65 the several parts beingin the samepositions as shown in Eig. 3. Fig. 5 represents, upon an enlarged scale,a transverse vertical section of the machine upon the dotted line m, showing more clearly the arrangement of the self-act- 7o ing means provided in connection with the wagon for effecting its return to the back of the die. Fig. 6 isa separate View ofthe traveling wagon, showing the arrangement of the pivoted and balanced hook which engages with the traveling chain.

The same letters of reference indicate corresponding parts in the several figures of the drawings.

According to this invention it is proposed 8o to arrange at the opposite ends of one side of the draw-bench d a pair of grooved or other pulleys b and c, the former of which is keyed to a spindle b', which is driven by a pinion b2 from the spur-Wheel b3, this latter Si' being made fast to the shaft b of the usualV gear provided for driving the endless chain (l of the bench, while the other pulley c is arranged to run loose upon a fixed spindle d, and around these two pulleys an endless rope 9o or band e is arranged, the motion imparted to the live pulleyfrom the gearing being such that the rope is driven around the reverse Way to the traveling chain of the bench.

The wagon or trolleyfis of the ordinary construction and is provided with a self-acting rope-gripping device g, which comes into action when the wagon is freed from the tube and automatically establishes connection be tween the wagon and the traveling rope, which then draws back the said wagon up to the die end a of the bench and in the reverse direction to that in which it was drawn by the traveling chain when pulling the tube through the die. Thus in the arrangement of wagon shown in Ithe drawings one side of the wheeled frame f' of the same is provided with a bracket g, having a hanging arm g2, the lower end of which is formed into or itted with a hook or trough-shaped or equivalent bearing or guide g3, through which the endless rope normally passes, while that end of the trolley-hook or chain-catch f2 which is presented toward the die end of the bench is weighted or balanced at f3, the effect of this being to tilt the catch out of its engagement with the chain when the resistance from the tube is overcome, which happens when the tube is drawn through or should the tube break in the act of being drawn. To the one side of this weighted end of the catch a second bracket g4 is attached, 'with a depending arm g5, whose lower end carries an inverted hook or trough-section bearing end Q6, which normally lies above the rope (see Fig. 5) and in advance of the hook of the frame-bracket or xed part of the trolley; but when the weighted end of the catch drops on the completion of the draw-through orwhen the draw is interrupted by the breakage of the tube this inverted hook comes onto the rope, which is gripped, as shown in Fig. 2, by the reversed hooks of the respective arms or brackets on the tilting part and the iXed part of the trolley, and thus a frictional connection is set up between the rope and the gripping device upon the wagon sufficient to enable the latter to be brought back to the die end of the bench by the pull of the traveling rope.

Instead of having reverse hooks at the gripping ends of the brackets the same may be provided with eyes or loops so arranged as to admit of the free travel of the rope through them under normal conditions, but adapted to grip or frictionally hold the said rope when the wagon-catch tilts out of the chain.

Having fully described my invention, what I desire to claim and secure by Letters Patent isl. In draw-benches or drawing machinery;

automatic or self-acting mechanism for returning the plier-wagon to the die end of the bench immediately it becomes disconnected from the object being drawn, consisting of an endless driven rope, band or chain traveling in the opposite direction to the benchchaiu, combined with a plier-Wagon, and a gripping device mounted on the wagon provided with means to automatically engage the said return rope, band or chain when the said wagon frees itself from the bench-chain, substantially as herein described and set forth.

2. In draw-benches or drawing machinery; automatic or self-acting mechanism for returning the plier-wagon to the die end of the bench, consisting of an endless rope or band traveling in the opposite direction to the bench-chain, a plier-wagon provided with a balance chain-catch, and a gripping device mounted on the wagon and comprising a hooked arm fixed to the body of the said wagon and a second hooked arm with the hook reversed fixed to a balanced chaincatch, with the said rope or band passing be tween the reversed hooks, the several parts being arranged combined and operating substantiallyin the manner herein described and set forth.

3. In draw-benches or drawing machinery; the combination with a pair of pulleys at the opposite ends of one side of the bench, with one pulley running loose and the other being driven from the gear of the bench, and an endless rope or band running around the pulleys and traveling in the opposite direction to the bench-chain, of a plier-wagon having a balanced or weighted chain-catch, and a rope-gripping device consisting of a pair of arms with reversed hooks, attached respectively to the wagon-body and to the chain catch thereof, with the traveling rope running between the said hooks; the several parts being arranged and combined to operate substantially as herein described and set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

HARRY HARVEY KNIGHT.

Vitnesses:

HENRY L. KERRETT, ARTHUR T. SADLER.

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