US782201A

US782201A - Nipple-chuck.

Info

Publication number: US782201A
Application number: US21266104A
Authority: US
Inventors: Alexander W Mcgahan; Otto K Ascher
Original assignee: A P FLEMING; B H CASS
Current assignee: A P FLEMING; B H CASS
Priority date: 1904-06-15
Filing date: 1904-06-15
Publication date: 1905-02-07
Anticipated expiration: 1922-02-07

Description

No. 782,201. PATENTBD FEB. 7, 1905. A. W. MOGAHAN & O. K. ASCHBR.

NIPPLE CHUCK.

APPLIoATIoN FILED JUNB15, 1904.

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UNITED STATES PATENT Patented February '7, 1905.

ALEXANDER IV. McGAI-IAN AND OTTO K. ASCHER, OF LOS ANGELES, CALIFORNIA; SAID MCGAHAN ASSIGNOR TO B. l'I. CASS ANI) A. I. FLEMING, OF LOS ANGELES, CALIFORNIA.

NIPPLE-CHUCK.

SPECIFICATION forming' part of Letters Patent No. 782,201, dated February '7, 1905.

Application filed June l5, 1904. Serial No. 212,661.

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Be it known that we, ALEXANDER W. Mc- CrAHAN and OTTo K. AscrrER, citizens of the United States` residing' at Los Angeles, in the county ofLos Angeles and State of California, have invented new and useful Improvements in Nipple-(lfhucks, of which the following is a specification.

The primary object of our invention is to provide a device that will hold securely a nipple or short piece of pipe upon which it is desired to place a thread or screw with the customary ap'- pliances for cutting' said screwe., a stock or die or thread-cutting' machine.

Another object is to provide a device that will prevent the nipple from remaining in the die when said die is being reversed after said thread has been cut upon said nipple.

Another object is to provide a device that will quickly and conveniently release said nipple after the thread has been cut and the die has been removed.

A further object is to provide a device that will permit of either a right-hand thread or a left-hand thread being' cut upon such nipple or short piece of pipe, at the same time retaining all the advantages above mentioned.

The accompanying drawings illustrate the invention.

Figure I is a longitudinal section of the device with a nipple held therein. Fig. 2 is a plan of the central g'ripping plug' or chuck. Fig. 3 is a vertical section on the line X X in Fig. l. Fig. A is a section on the line X" X in Fig. l. Fig. 5 is a section through the gripping end of the device, showing the application of a reducing-bushing thereto. Fig. 6 is a perspective view of said bushing.

The invention comprises a case, barrel, or l cylinder I, a movable or rotative member 2 traveling upon and engaging with said barrel, as by means of a screw-thread connection, in such manner as to be advanced or retracted longitudinallyY of the barrel, and a central gripping plug or chuck 3 traveling' within said barrel and connected with said rotative member to be advanced or retracted therewith, the said barrel being provided at its end with suitable means, such as a screw portion A, adapted to engage a nipple or pipe and hold it in position for the thread-cuttingoperation, and the central plug or chuck being' adapted to engage with the nipple to hold it from turning when it has been brought to proper position.

The central plug' o1' chuck 3 is supported and guided within the barrel 1 in such manner as to allow thc longitudinal movement of said plug', but to prevent rotation thereof relative to the barrel, and said plug or chuck is connected to the member 2 in such manner that longitudinal movement of said member will be communicated to said plug. The member 2 is preferably a hand-wheel turning upon the barrel 1 and engaging therewith by a screwthreaded portion 5, working' upon the screwthread 6 on the barrel. The connection between said hand-wheel and the central chuck is by means of a pin 7, extending through a hole 8 in said central chuck, through slots 9 in cach side of the barrel, and into an annular slot or groove l0 formed in the hand-wheel, so that as the hand-wheel rotates the annular slot of the liand\\'lieel, riding around over the ends of the pin, will press the pin and chuck longitudinally one way or the other. To enable the parts to be readily assembled, the outer wall of the annular slot or groove is formed by a removable plate II, fastened to the hand-wheel by screws A loose ring 13 placed at the inner side of said annular slot to serve as a wear-plate and antifri'ctionring.

The central chuck 3 is preferably cylimlrical to lit within the barrel I and slide therein, and it is provided at its forward end with angular faces M, preferably concaved, as shown in Fig. 3, to enable it to grip more effectually the inner end of the nipple. The connection between this plug and the hand-wheel is such that when the parts have been brought to g'ripping position rotative movement of the plug' in either direction will result in a slight further advance of the plug so as to increase the gripping action. For this purpose the hole 8 through said chuck or plug is formed at its forward side with a double cam-face or bearing portion l5, reversely curved or inclined in each direction from the center so that as the plug turns in either direction from a central position (shown in Fig. 2) it will rise on the pin in such manner as to be pressed forward, as indicated in dotted lines in Fig. 2. A spring 16 is connected to the central plug orchuck in such manner as to tend to restore it to central position when released, said spring, for example, consisting of a stii' wire passing through the hole 17 in a stud 18, projecting from the rear end of said plug. The outer ends of said spring extend into the guideslots 9 in the barrel. The rear side of hole 8 is so formed as to permit the movement of the plug straight across from one side to the other without any material change in the lateral position of the plug.

The operation of the device is as follows: The wheel 2 is reversed, thus driving the chuck back in the case or barrel. The nipple (indicated at 20) is inserted by screwing into the end of the case or barrel two or three threads or as far as is desired. Then the wheel is turned forward, thus advancing the chuck until a contact is made with the nipple. Then anytendency to turn the nipple in either direction will cause the chuck to be pressed forward on account of its mounting the curved incline 15. After the thread has been cut on the nipple the reverse strain of backing the die ofiLA the nipple (or the nipple off the die) throws the chuck in a straight line over to the opposite wall of the curved inclined hole, when again any tendency of the nipple to revolve will cause the chuck again to press forward farther into the nipple. After the die is removed, in order to take out the nipple the wheel is reversed, thus driving' the chuck away from the nipple, when it can readily be unscrewed. As soon as the tension is released from the chuck the spring 16 throws the chuck back to its original position with the lowest point of the curved incline opposite the pin.

In order to provide for cutting smaller sizes of pipe than the one that screws into the case or barrel, we provide reducing-bushings 21, preferably of the design illustrated in Figs. 5 and 6 and provided with interior and eX- terior threads 22 23, corresponding, respectively, to thread 4 and to the thread of the nippletobecut. Theinteriorofthebushingis shaped to conform to the shape of the point of the chuck, having cuts or notches 24: adapted to clear the biting edges or corners 25 of the chuck, so that when a nipple is inserted into the bushing and there is -Contact between the chuck and the nipple there is no contact between the chuck and the bushing and so that the bushing cannot be screwed up with the nipple and can only be removed by further reversing the wheel.

The device may be variously modified without departing from our invention.

Wvhat we claim is l. In a nipple-chuck, a supporting member adapted to receive and hold the end of a nipple, a chuck member movable longitudinally in said supporting member, an operating member movable longitudinally on the supporting member, a connection between said operating member and the chuck member to cause the longitudinal movement of said chuck member,

and means comprising engaging portions on the operating and chuck members, one of said engaging portions having reversely-inclined cam-faces to cooperate with the other of suoli engaging portions for causing advance of the chuck member on rotation thereof in either direction.

2. In a nipple-chuck, a longitudinally-slotted barrel screw-threaded at the end to receive and hold the end of a nipple, a member movable along and rotatable around the barrel and having an annular groove, meanson the barrel and member to cause 'movement of the member along the barrel on rotation of said member, a chuck member movable longitudinally within the barrel, and a pin engaging with said chuck member and extending through the slotted barrel into engagement with the groove in the rotating member.

3. In a nipple-chuck, a longitudinally-slotted barrel screw-threaded at the end to receive and hold the end of a nipple, a member rotatable upon the barrel and having an annular groove, means on the barrel and member to cause movement of the member along the barrel on rotation of said member, a chuck member movable longitudinally within the barrel, and a pin engaging with said chuck member and extending' through the slotted barrel into engagement with the groove in the rotating member, the chuck member having reverselyinclined cam portions engaged by said pin to cause advance ofthe chuck member on rotation thereof in either direction.

4. In a nipple-chuck, a longitudinally-slotted barrel screw-threaded at the end to receive and hold the nipple, an operative member rotatable on said barrel and having an annular groove, means on the barrel and member to cause movement of the member along the barrel on rotation of said member, a chuck member movable longitudinally in the barrel, and having a transverse hole formed with reversely-inclined cam-surfaces, and a pin eX- tending through said hole and through the slots in the barrel into the annular groove in the operating member.

5. In a nipple-chuck, the combination of a supporting member adapted to receive and hold the end of the nipple, a chuck member movable longitudinally in said member to engage the end of the nipple, a cam connection between said members to cause advance of the chuck member on rotation thereof in either direction from a central position, and means for returning the chuck member to central position.

6. In a nipple-chuck, a longitudinally-slot- IOO IIO

ted barrel adapted to receive and hold the end of a nipple, an operating member engaging by screw engagement with said barrel, a chuck member movable longitudinally in the barrel, connecting means engaging with the operating member and extending through the slotted barrel into engagement with the chuck member to move the same longitudinally on rotation of the operating member, the chuck member being provided with reversely-inclined cam means engaging the connecting means to advance the chuck member upon rotation thereof in either direction, andaspring engaging' with the chuck member and with the barrel to return the chuck member to central position.

7. In a nipple-chuck, a longitudinally-slotted barrel adapted to receive and hold the end of a nipple, an operating member engaging by screw engagement with said barrel, a chuck member movable longitudinally in the barrel, connecting means engaging with the operating member and extending through the slotted barrel into engagement with the chuck member to move the same longitudinally on rotation of the operating member, the chuck member being provided with reversely-inclined cam means engaging the connecting means to advance the chuck member upon rotation thereof in either direction, and a spring engaging with the chuck member and with the slots in the barrel to return the chuck member to central position.

In testimony whereof we have hereunto signed our names, in the presence of two subscribing Witnesses, at Los Angeles, in the county of Los Angeles and State of California, this 7 th day of June, 1904.

ALEXANDER NV. MCGAHAN. OTTO K. ASCHER.

W'itnesses:

ARTHUR P. KNIGHT, JULIA TOWNSEND.