US393457A - Pipe-threading die-stock - Google Patents

Description

(No Model.) DE WITT G. BEANB.

PIPE THREADING DIE STOCK. No. 393,457. Patented Nov. 27, 1888.

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UNITED STATES PATENT OFEicE.

DE VVITT G. BEANE, OF NEWARK, NEW JERSEY.

PIPE=THREADING DIE-STOCK.

SPECIFICATION forming part of Letters Patent No. 393,457, dated November 27, 1888.

Application filed July 6, 1888. Serial No. 279,193. (No model.)

To all whom it may concern.-

Be it known that 1, DE VVITL O. BEANE, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvementsin Pipe-Threading DieStocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters of reference marked thereon, which form a part ofthis specification.

The object of this invention is to secure a more convenient and ready adjustment, to reduce the cost of construction, and to otherwise pro'videa more durable and efficient pipestock.

The invention consists in theirnproved pipestock having the arrangements and combinations of parts substantially as will be hereinafter set forth, and finally embodied in the clauses of the claim.

Referring to the accompanying drawings, in which like letters of reference indicate corresponding parts in each of the several figures, Figure 1 is a plan of the improved pipe-stock, showing an outer face portion of the dieholder removed. Fig. 2 is aside elevation of the same. Fig. 3 is a section taken through line 10 of Fig. 5, showing a certain stop-pin adapted to engage a die-holder and keep the same from turning. Fig. 4 is a plan view of said stop pin. Fig. 5 is a sectional view taken through line a, Fig. 1.

In said drawings, a indicates a bed-plate, having at the opposite ends thereof sockets a, adapted to receive handles 7) b, which extend oppositely, so as to allow both hands to be used in turning the pipe stock. The center of the said bed plate is provided with large pcrforations considerably larger than the pipe upon which the screw is to beturned, and the upper face of the said plate is formed to receive a top plate, 0. The said top plate is recessed or chambered on the under side, as at c, Fig. 5, the chamber 0 being formed between the outer part of said plate and the said bed-plate. In said chamber is arranged a double pawl, d, Fig. 1, and a spring, 0, adapted to engage a ratchet, h, on the die'holder, as will behereinafter described. The upper face of the said top plate is provided with a large annular opening,through which a die-holder,f,extends. The said die-holderfis shown more clearly in Fig. 5, where it is shown to restupon the bed-v plate a and held thereon by the said top plate, the ratcheted flange h lying between the said bed-plate and the top plate. At one side of the said ratcheted flange h is a shoulder, g, which has its hearings in the large openingin the bed-plate a On the other side of the said flange is a shoulder, i, which lies in the large opening in the top plate, all as will be evident upon inspection of Fig. 5. At the center of the said holder is a pipe passage, j, through which the pipe, bolt, or shaft upon which the thread is cut extends.

a is a set-screw for steadying the pipe-stock on the pipe, and c is a set-screw for a similar purpose when a bushing, 11, is used.

The upper end of the said passagej is enlarged to form a chamber, K, into which the chips or shavings from the pipe may fall.

Upon the upperside of the holder is formed a chamber, a, for the die or thread-cutter, the said chamber-having alateral passage or open ing, Z, through which the die to be inserted in the holder may he slipped into place. These gnideways 0 0 are formed on two opposite sides of the chamber a, as shown in Fig. 2, and extend longitudinally between the studs m in, as shown in Fig. l, and extend upward to nearly the top of the chamber a, as shown in Fig. 5. These guideways are preferably made integral with thestuds m. m. At one side of said passage is a stop, m. and at the sides of the chamber a are formed gnideways or bars 0 0, which preventthe corners of the die from catching.

At the mouth or passage Z is arranged a suitable catch, 1). which may be controlled by a spring, but preferably by merely turning in its bearings, so that a lip, 1-, may engage the edge or side of the die when turned down, as shown in Fig. 5, to prevent the same from falling out. Vhen it is desired to remove the die, this catch is turned up by means of a thumb-piece, 1), into a horizontal position, as shown in Fig. 1.

The receptacle or chamber a for the die is approximately of a shape corresponding with the die-plate, so that the plate cannot turn therein in the operation of cutting.

' pin is only used in what is known as hand- The facing s of the holder is permanent thereon or formed integral therewith, as may be desired, the said facing being preferably held on by studs in m of the holder by rivets cast on the holder ends of said studs and extending into said facing and there being riveted.

To pret'eut the holder from turning in its bearings I have provided a stop pin or key, 25, (shown more clearly in Figs. 3, 4, and 5,) which is adapted to engage the periphery of the shoulderg of the holder, which latter is suitably notched, countersunk, or recessed, as at g, Fig. 3, to receive the end of the said pin.

The bed-plate a is provided with a chamber, g, and a bearing, 9", and a slot, g", Figs. 3 and 4 The said pin t extends through the chant her to enter the notch or recess y, and is provided with a spring, 9, which engages the said shoulder g, and a pintle or shoulder, 1 Fig. 3, whereby the said pin t is held normally into engagement with the die-holder. The said pin i may be held from such normal engagement by means of a pintle, which extends from the pin 13, as shown in Figs. 3 and 4.

By drawing on the pin 25 the pintle is caused to pass through the slot 9, and by turning the said pin t the said pintle is caused to engage the bearing g. so that said pin is held away from the die-holder, as will be understood.

By the use of the spring actuated pin 15 and notched holder f said pin and holder may be brought into holding relation automatically, as may be required. This spring'actuated over-hand cutting, or when the pipestock is turned continually in one direction. In such cases the pawl-and-ratehet device is dispensed with. For general work I prefer the pawland-ratchet device and dispense with the pin t.

By having the facing s of the holder permanent with the opening l at the side and a simple catch, the die may be arranged in place in the holder very quickly and without the i trouble incident to the use of aseparate plate, such as have heretofore been employed.

To allow of the die and holder being used in cutting either a right or a left hand screw, I have provided a double pawl, d, having pawl-teeth d d, and a bearing, (1 to enterthe spring e. Thesaid pawl is also provided with a finger'pieee, d, which extends through the slot (1 in the top plate, 0, and thus the said pawl may be turned so that either of the teeth d may thus be brought into engagement with the ratchet h.

The pawl and spring are held within the chamber a, so that they are protected from accidental displacement or other injury, and the relation of the spring and paw] is such as that the said pawl may be changed in its relation to the ratchet without altering the position of the spring. To this end the spring is arranged approximately at right angles to the longitudinal line of the pipe-stock, and a bearing (1 vibrates from one side to the other of said line, when the pawl-teeth dare changed in their relations to the ratchet. The spring is also an independent and separate piece from the pawl, so that the said pawl is readily changed without disturbing the spring. The spring 6 is intervened between the bearing d of the. pawl and the bearings d d of the bedplate or top plate.

The die to be used is slid into the die-chainber and the catch 19 is turned down, as shown in Fig. 5, thus holding the die in proper position in the die-chamber. The pipe to be cut is first firmly secured to a pipe vise or bench in the ordinary manner. The end of the pipe on which the screw-thread is to be cut is then passed through the opcningj of the pipe-stock until it reaches the cutting-teeth on the inside of the die. The handle of the pipe-stock is then moved up and down, causing the die, with its cutting-teeth, to move in one direction around the pipe and cut the thread on the same, according to the number of cuttingterth on the die.

Having thus described the invention, what I claim as new is 1. In a pipe-stock, the combination of a bedplate and a top plate with a die-l1older,f,having ratchcts h, a notch or recess. (1', and a spring-actuated holder, 1, adapted to engage the said notch and hold the dieholder in position automatically, substantially as and for the purposes set forth.

2. In a pipe-stock, the combination of a bedplate, a, a top plate, 0, a die-holder having a diereceptacle, it, formed in the said holder and having a lateral passage, 1. and a catclnp, to prevent withdrawal of the dic plate, substantially as and for the purposes set forth.

3. In a pipe-stock, the combination of a bed-plate and top plate, a ratcheted die-holder and a double pawl having a finger-piece, d, and arrangediu a chamber between said plates a spring, a, substantially as and for the purposes set forth.

4. In a pipe-stock, the combination of a bedplate, a ratcheted die-holder, and a pawl, the said die-holder being provided with a lateral passage, 1, leading to the die receptacle or chamber, the said chamber having at the side opposite the passage t a stop, m, and at the other side suitable guides or ways, 0, substantially as and for the purposes set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 5th day of July, 1 88.

DE \VITT C. BEANE.

Witnesses:

CHARLES H. FELL, Cousranon H. BALDWIN.

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