US661597A - Screw-threading device. - Google Patents

Description

No. 66!,597. Patented Nov. l3, I900.

m BEHRENS SCREW THREADING DEVICE. (Applicatioli fllqd Mar. 24, 1699.

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UNITED STATES PATENT OFFICE.

MARTIN BEI-IRENS, OF APPLETON, WISCONSIN.

SCREW-TH READING DEVICE.

SPECIFICATION forming part of Letters Patent No. 661,597, dated November 13, 1900.

Application filed. March 24, 1899.

To ctZZ whom, it may concern:

Be it known that I, MARTIN BEHRENs, a citizen of the United States, residing at Appleton, in the county of Outagamie and State of Wisconsin, have invented new and useful Improvements in Screw-Threading Devices, of which the following is a specification.

My invention relates to improvements in pipe-cutting and screw-threading devices.

The object of my invention is to provide a device which can be used interchangeably for cutting pipes and for threading pipes and nipples.

In the following description reference is had to the accompanying drawings, in which- Figure 1 is a side elevation with parts broken away to show the interior construction, both die-holders being shown in a position for use, but without threading-dies, and the pipe being partially inserted through the vise and the die-holder supported thereon in order to indicate the position occupied by the pipe. Fig. 2 is an elevation of the end provided with the rotary die-holder. Fig. 3 is a top view of the vise. Fig. 4 is a horizontal sectional view of the vise drawn on line a: so of Fig. 1. Fig. 5 is a sectional view drawn on line y y of Fig. 1. Figs. 6 and 7 are front and side views, respectively, of the pipe-cutter. Fig. 8 is a face view of the rotary die, illustrating the use of a jam-collar.

Like parts are identified by the same reference-letters throughout the several views.

A is a bed from which the parts of my machine are supported.

13 is a die-frame provided with a dovetailed base I), slidably engaged in a corresponding channel in the bed. The outer end ofthe base I) is recessed for the reception of an adjusting-block b, which is engaged by the adjust ing-screw a, the latter being secured in suitable bearings a at the other end of the bed. By turning the screw in the block b the vise may be drawn toward the opposite end of the bed in an obvious manner.

Referring to the construction of the vise itself, it will be observed, Fig. 5, that it is provided with oppositely-disposed jaws O C, removably located in screw-blocks O, which are supported upon right and left screwthreaded shafts D, so that by turning the shafts D the jaws ,O 0 will be simultaneously serial. No. 710,315. @110 m del.)

adjusted away from or toward each other. The shafts are actuated by means of a handwheel E, the motion of which is communicated to the shafts and jaws through the shank e, gear-wheel e, and shaft gear-wheels d. The vise-frame is also provided with a removable die-frame F, the purpose of which is hereinafter more fully explained. The frame F is provided with angular supporting-arms f, which are adapted to slidably engage projecting guides G at the sides of the vise-frame B, the arms) being adapted to bear upon the shoulders g at the lower ends of the guides G.

At the opposite end of the bed from that at which the vise is located I have provided a rotary die-holder, of which H is the supporting-frame, rigidly mounted upon the bed. I is a hollow shaft rotatably mounted in the frame and actuated by means of a crank or lever applied to the shaft J, from which mo tion is communicated to the shaft I through the gear-wheels j and K, the latter being keyed to the shaft I. The gear-wheel j is preferably arranged to communicate its motion to the large gear-wheel K, through the gears M and M',-in addition to its direct engagement, the object of this construction being to relieve the strain which the individual teeth would be subjected to if but a singlegearwheel were used; but where light duty is required the shaft I may be actuated directly by means of a lever L inserted through it, as illustrated in Figv 1. 7

It will be observed that the shaft I carries a rotary die-frame N, which is held thereby in a position opposite to the stationary dieframe F, supported by the vise B. The frames F and N are adapted to receive any ordinary form of die either of the integral or adj ustabletype.

Referring now to the pipe-cutter, (shown in Figs. 6 and 7,) it will be observed that the frame 0 is provided with offset arms P, adapted to engage the edges of the die-frame, to which it is secured by means of bolts P. The pipe is engaged between a cutting-wheel Q and bearing-roller R R, mounted, respectively, in oppositely-disposed head-blocks S and adjusted by means of screws T, swiveled to the head-blocks. i The pipe being held by the vise, the rotary die-holder turns the frame 0 and carries the cutting-wheel transversely around the pipe, the screws T being adjusted at intervals to correspond with the depth of the cut.

When my device is used for screw-threading pipes in the ordinary manner, the stalionary die-frame F is usually removed and the pipe inserted between thegripping-jaws of the vise, the latter being then moved toward the rotary die-holder until the end of the pipe enters the die-frame. The vise is then adjusted by means'of the screw (1 until the end of the pipe is brought into forcible contact with the die, when" the die-holder is rotated, as above explained, to cut the threads.

For threading nipples, however, I replace the stationary die-frame F, and in. the rear of the dies N in the frames F and N, I place a jam-collar U, of such size as to engage the ends of the nipple, a rod or smaller pipe being preferably inserted through the nipple to reinforce it. The vise being drawn up to bring the nipple into contact withvboth dies, and the nipple being forced into such cone tact by the screw a, the rotary die-holder is turned to cut the threads as above described. It is obvious that if the nipple turns it will be, threaded by the stationary die and that if it remains stationary it will be threaded by the rotary die, but that in either case it will on reaching the jam-collar behindeither die become fixed in such die, and the oppos- -.ing die will then operate to thread the other end of the nipple. The short pieces notbeing engaged by the vise are free to either turn. with. the rotary: die or to be held by the-stationary die. Whether the pipe will turn on not depends, therefore, upon the resistance encountered by the respective dies,

, Forcut'ting right and left threads the pipesection is engaged'either by the vise or he,- tweeIi't-hedies and the thread cut on one end 1 This die is then removed and an oppositely-formed die inserted, when the pipe-section is reversed in position and.

"slides freely in the bed.

serted in the stationary die and held therein by a pipe-wrench while the rotary die is being turned in: the oppositedirection.

It will be observed that as soon as the pipe is, engagedby the die of the rotary die-holder the progressive movement of the die will draw the vise forwardly independently of and away from the screw-block b,.as the vise It is therefore not necessary to: actuate. the screw (2, except to bring the pipe into forcible engagement with the die.

Havingthus described my invention, what I claim as new, and desire to secure byLetters Patent, is.

1. llhe combination of bed; a pipe-holding viseslidably mounted therein; an adjusting-screw mounted in the bed and extending through. an aperture, in the base of the pipeholding vise; a feed-nut screw-block engaged by said screw in the rear of the vise; and a rotary die-holder mounted'on said bed and adapted to cooperate with the vise; together with a die-holder provided with supportingarmsadapted to removably engage the frame of the vise.

2. The combination of a bed; apipe-holding vise slidabl-y mount-ed. therein; a dieholder provided with supporting-arms adapt: ed to removably engage the frame of the vise; and. a rotary die-holder mounted on. the bed in cooperative relation with the'vise and the removable die-lolder supported thereby; together with means for adjusting the vise longitudinally of the bed.

In testimony whereof I affix my signature in the presence of two witnesses.

MARTIN B'EHRENS. Witnesses-z MALCOLM McCoy, AUGUST RUHLANDER.

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