US638299A - Opening die-head for cutting threads on bolts or pipes. - Google Patents

Description

No. 638,299. I Patented Dec. 5, IBM

W. L. TDBEY.

OPENING DIE HEAD FUR CUTTING THREADS UN BULTS UR PIPES.

7 (Application filed Mar. 22, 1899.) (N0 M B 2 Sheets-Sheet l.

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No. 638,299. Patented Dec. 5, I899.

. W. L. TDBEY. OPENING DIE HEAD FOR CUTTING THREADS 0N BOLTS DB PIPES.

(Application filed Mar. 22, 1899.) 7 (No Model.) 2 Sheets-Sheet 2.

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.with the other end slotted for the dies 6.

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W'ILL'IAM L. TOBEY, OF BOSTON, MASSACHUSETTS.

OPENING DIE-HEAD FOR CUTTtNG THREADS ON BOLTS 0R PIPES.

SPECIFICATION forming part of Letters Patent No. 638,299, dated December 5, 1899.

Application filed March 22, 1899. $erial No. 710,114. No model.)

.10 all whom iv may concern.-

Be it known that I, VVILLIAM L. TOBEY, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Opening Die- Heads for Cutting Threads on Bolts or Pipes, of which the following is a specification, in connection with the accompanying drawings.

Like letters on the drawings represent like parts.

This invention has for its object the production of an opening and adjustable the head which will lock the dies solid when closed, admit of easy and universal adjustment when closed, open and close the dies easily without any tendency to wear the dies, guides,oradjustment whennnlocked, hold the dies in place in any position of the head when disconnected for changing dies, admit of changing the dies without the use of a Wrench, free the interior of the head from oil without throwing-oil around except in one plane, and one that is short and compact,that will be simple, and that can be manufactured at a reasonable cost. I obtain this by the construction shown in the accompanying drawings, of which-- Figure 1 shows on the lower half an external side view and on the upper half a section of the die-head when closed, with the sliding hand-ring, the adjustable locking-ring, the dies, opening-lever, friction die-holder, oil grooved face-plate edge, and spring-block limiting movement of ring longitudinally on the head. Fig. 2 shows an external end view with the dies, adjusting and locking cams, friction die-holders, and center chamber oildrains. Fig. 3 shows the dies opened with the hand-ring b drawn back against the stop block m and the locking-ring 0 back ofi of the dies e, allowing the lever cl to move the dies out. Fig. 4 shows the stop-block m pushed down and the ring I) moved back, so that the lever 01 is disengaged from the die 6.

The construction is as follows: There is a central barrel at, having on the back end a suitable flange for bolting to a machine and In line with the-dies e is'milled a slot to receive the opening-lever d. One end of the lever 01 engages in a slot in the back of the die e. The top of lever d has two projecting dogs,

that by contact with the ring I) reciprocate the lever d and open and close the die 6. Around the barrel a there is a sliding handring Z), to which is secured the locking-ring c by two bolts t, clamping through the slots in the ring I). The locking-ring c has on its face the projecting lug k, engaging when closed a corresponding lug on the top of the die 6. The locking ring c has the two holes p in the outside for the insertion of a bar or spanner to turn the ring 0 when the nuts 25 are slackened. The locking-ring c carries internal cam-faces, by which the radial movement of the cutters may be adjusted.

The faceplate f is fastened to the barrel 0. by screws and carries over each die e the friction-stud g. The stud g is held in place against the die 6 by the spring hand the screw t'through the spring h. Through the faceplate f to the central chamber are the holes a, which allow the escape of oil to the face of the face-plate f. Around the edge of the face-plate f is a grooved oil-flange, which prevents the oil running back on the head and being thrown around the whole length of the head, as follows; the waste oil after being applied to the cutting-dies flows out of the center chamber through the holes at to the front of the face-plate. Centrifugal force carries the oil to the outer sharp edge of the groove, where the oil is thrown off in one plane instead of along the whole length of the rings 17 and c. If the machine is at rest, the oil runs out the center hole 72, and down the face of the plate, dropping off the lower edge. If for any reason the head is turned around, the groove prevents the oil running back on the rings by forming a channel, in which the oil will run to the lowest point and drop from there.

On the back part of the barrel a is the block m, which slides in a hole in the barrel a and is kept in place by the spring .9 and the screw u sliding in a slot in the flange of the barrel Ct.

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the projecting dog w of the opening-lever d. Further movement of the ringb until in con tact with the block m carries the lever (Z to the position shown in Fig. 3, when the die 6 is opened clear of the thread out. If it is desired to change the dies 6, the block on is pressed down, so that the ring 12 will pass over the block m, carrying the lever 01 to the extreme position, as shown in Fig. 4, when the lever d is disengaged from the die 6 and the die 6 can be Withdrawn. I11 putting in the die 6 it is held in place for the proper engagement of the lever 01 by the friction-stud When all the dies are in place, the forward motion of the ring I) pushes down the lever d, engaging the slots in the dies e and forcing down the dies c to the closed position. Continued forward movement of the ring I) carries the locking-ring a over the top of the die 6 until the locking-lug 79 is engaged. The first forward movement of the ring I) uncovers the block m, when the spring .9 forces up the block m, stopping the return movement of the ring 1) beyond that necessary to open the die e.

The lockingring 0 does not necessarily cover the whole of the die 6, but preferably the greater part, as shown, on account of the more solid holding of the dies.

Iclaim as myinvention and desire to secure by Letters Patent 1. The combination in an opening die-head of the movable dies, independent opening and closing levers operating directly on the dies, an independent locking-ring partially covering the dies when closed and looking directly and positively by engaging a lug on the dies with cam-ribs on the locking-ring, said looking or die ring having adjustment for varying the locking position of the dies.

2. The combination in an opening die-head of the movable dies, opening and closing 1evers, an adj nstable die-ring having cam-ribs for varying the locking position of the dies and a spring friction device applied to the dies at right angles to the direction of adj ustment of the dies, to hold the dies in any position substantially as described.

3. The combination in an opening die-head of the movable dies operating-levers, adjustable die-ring having cam-ribs for varying the locking position of the dies, and an actuatingring with spring-stop limiting the movement of the actuating-ring when in position and which by pressure toward the center axis of the die-head allows further movement to the actuating-ring.

4. The combination in an opening die-head of the movable dies, actuating-ring, operating-levers, adjustable die-ring having camribs for varying the locking posit-ion of the dies, a drain hole or holes from center chamber of head through face-plate and face-plate having an oil-groove in periphery substantially as described.

In testimony whereof I have afiixed my signature in presence of two Witnesses.

\VILLIAM L. TOBEY.

Witnesses:

EDW. R. LEWIS, T. L. TIsDALE.

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