US1156290A - Reamer attachment for die-stocks. - Google Patents

Description

D. HITCHCOCK.

REAMER ATTACHMENT FOR DIE STOCKS.

APPLICATION FILED 0Ec.22. 1914.

1,156,290, Patented Oct. 12, 1915.

i 4 K i W T all whom it may concern Be it known that I, DELBERT Hlroncook,

' a citizen of the United States, residing at St. Paul, in the county ofRamsey and State of Minnesota, have invented a new and useful Improvement in Reamer Attachments for Die-Stocks, of which the following is a specification. I

This invention relates to' a reamer attachment for die stocks, the primary object thereof being to provide a device, which is readily and quickly adjustable to different sizes of pipes, whereby the pipes may be threaded, and the burs resulting from cutting, reamed out and removed in a single operation. In a device of this general character it has been found in practice, that the reamer must be held with its cutting edges against the inner edge of the end of the pipe which is being threaded, so that it willnot engage too abiuptly and bite into the pipe, causing'either the reamer to break or the end of the pipe to be cut unevenly or too deeply. This objection I have overcome by providing a reamer attachment, which holds the reamer to its work under spring pressure and which is readilyadjustable to different kinds of work, and to different sizes of reamers which are employed. 1

A further object of the invention is to provide a reamer attachment, which can be mounted upon the die stock and made to hold the plate, which fastens the thread cutting elements in the stock, in place of the screws, which are ordinarily employed for fastening said plate in position.

A still further object is to provide an attachment of the character stated, which will adjustably hold the reamer, so that 'it can be properly centered in the end of the pipe to be reamed.

To these ends my invention, comprises the features of construction, and combination of parts, which will be hereinafter more particularly described and set forth in the claims.

In the drawing, Figure 1 is a side elevat1on partly in section of an embodiment of my invention, a detail portion of a die stock being shown; Fig. 2 is a plan of the construction illustrated in Fig. 1, and Fig. 3 is a plan of a detail.

In the drawing, A indicates a portion of a die stock, having the usual handles 2 and 3 secured in the usual socket pieces, which are formed integral with the body 4 of the DELBERT HITCHCOCK, OF ST. PAUIII, MINNESOTiL.

Specification of Letters Patent.

BEAMER A TACHMENT For. DIE-STOCKS.-

Patented Got. 12. 1915..

Application filed December 22, 1914. Serial No. 878,478.

stock. The-body 4 has the usual recess or chamber .5, in which the thread cutting elements 6 are held in the usual manner by a cover plate 7. This cover plate ordinarily.

is fastened .by screws not shown passing through openings 8 in the plate, and entermg threaded openings 9 in the body. Said screws are removed when it is desired to secure my improved attachment B to the die stock. In use the stock is applied to the end of a pipe, such as 10 to be threaded, said stock having its throat 11 passing over the pipe during the operation of cutting the thread. 4

My improved attachment consists of a downwardly against the plate 7, and hold thelatter firmly with thethread cutting I elements 6 engaged within thechamber 5. 'lhe guide arms 12 and 13 are parallel and extend outwardly in the same general direction from the body, suitable handles 16 being formed on their outer endsby which they'can be easily and quickly turned for attachment to or detachment from the die stock. Mounted upon the guides'12 and 13 is a yoke frame 17, having two sleeve portions 1.8, slidably mounted over the guides. The

bridge portion 17 of the yoke is formed 'Wlth a socket 19 in which the square shank 20 of the reamer such as 21 is received. The upper and lower faces 22 and 23 of the bridge adjacent the socket have secured thereto adjustable plates 24 and 25, each of which is formed with an opening 26, said opening being adapted to receive and hold the shank 2O snugly. These plates are fastened to the bridge by screws such as 27, slots such as 28 being formed in the plates, so that the plates can be adjusted and held in selected position to vary the angle at which the reamer is held by the reamer support or yoke. The slots 28 in the plate 24 are disposed at right angles to the slots spring pressure by means of the compression 7,

springs 29, which are placed over the guides with their lower ends pressing against the upper ends of the sleeve portions 18 of the yoke, and their upper ends held under compression below the adjusting nuts 30, which are threaded upon the guides. Thus by varying the compression of the springs 29, the force with which the cutting edges of the reamer are pressed into engagement with the pipe to be reamed is adjusted. The adjustment of the nuts 30 also varies the time when the reamer is made to engage and perform its work, it being necessary to vary this time of engagement according to the sizes of reamers employed, and the kinds of material which are being threaded and reamed. In use the guides are secured to the body 4 over the plate 7. After the reamer such as 21 is placed with its shank in engagement with the plates 24 and 25 on the reamer support, the nuts are then adj usted as desired, and the die stock employed to cut threads on pipes in the usual manner. It is not necessary to pay any particular attention to the reaming operation, 'as the reamer will automatically during the threading of a pipe, performits function in an efficient and effective manner;

In accordance with. the patent statutes, I have described the principles of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction shown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope of the following claims.

Having described my invention, what I waaeo claim as new and desire to protect by Letters Patent is 1. In combination with a die stock, a reamer, a holder for said reamer having a socket to receive and hold the shank of the reamer in Working position and a pair of sleeves near the extremities of said yoke, a pair of guide arms upon which said sleeves are slidably mounted, said arms being secured by their ends to the body of the die stock, compression springs on said guides pressing downwardly against said sleeves on said yoke and means for adjustably compressing said springs on said guides to vary the pressure at which the reamer is pressed by the yoke into engagement with its work.

2. In combination with a die stock and a reamer, a yoke frame having guide sleeves upon its ends and an opening between its ends into which the shank of said reamer is received freely, plates mounted upon said frame having openings to receive and hold the shank of said reamer, said plates being movably supported upon said frame so that their positions may be varied to change the angle .at which said reamer is supported, guides mounted upon said die stock upon which said sleeves are slidably, mounted, compression springs on said guide rods pressing downwardly upon said frame to force said reamer into engagement with its work and means on said guides for chang ing the compression of said springs.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

DELBER'I HITCHCOCK.

Witnesses:

STELLA L. WASOHENBERGER, F. G. BRADBURY.

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