US921518A - Ratchet pipe-threader. - Google Patents

Description

M. DIXON. BATGHET PIPE THREADER. APPLIOATION FILED 0012, 1907. 921,518, Patented May 11, 1909.

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MATTHEW DIXON, OF PITTSBURG, PENNSYLVANIA.

RATCIEET PIPE-THREADER.

T all whom it may concern:

Be it known that I, MATTHEW DIXON, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Ratchet Pipe-Threaders, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to. ratchet pipe threaders, and its object is, to provide a simple but effective device for threading pipes either when held in a bench vise, or when in position within a trench or ditch.

The invention comprises a casing containing a ratchet, thread-cutters and means for adjusting the same, a spring controlled pawl for rotating said ratchet and a handle bar co operating with said pawl.

The invention also consists of novel means for clamping the pipe within the casing and other features of construction all of which will be fully described hereinafter in connection with the accompanying drawing which forms a part of this specification, and set forth in the appended claim.

In the drawing, Figure 1 is a top plan view of a ratchet pipe threader embodying the invention, Fig. 2 is a side elevation of the same, and Fig. 3 is a longitudinal sectional view, Fig. 4 is a cross sectional view on the line :cr of Fig. 1, Fig. 5 is a horizontal sectional view taken on the line yy of Fig. 3.

To construct my improved pipe threader, I provide a circular body 1 having at diametrically opposite sides, threaded sockets 2 and 3 respectively to receive operating handles for turning the threader as will be more fully explained hereinafter. The circular body 1 is preferably provided with segmental-shaped hollowed out portions or chambers 1, made simply for the purpose of lightening the circular body and are not essential to the operation of the device.

The circular body 1 is provided with a central annular recess 5, at the lower end of which is an inwardly-extending annular flange 6 carried by the circular body, and seated in said annular recess of the circular body is a ratchet wheel 7 provided with a depending sleeve 8, projecting some distance below the bottom of the circular body.

Specification of Letters Patent.

Application filed October 2, 1907.

PatentedMay 11, 1909.

Serial No. 395,586.

Anti-friction balls 9 are provided as a bearing for the ratchet wheel 7, these balls being arranged in confronting ball racesformed in the sleeve 8 at the upper end of the latter and in the face of the flange 6.

The ratchet wheel 7 is retained in the circular body by means of a collar 10 secured to the sleeve 8 by set-screws 11, and abutting against the underneath face of the circular body.

The central bore of the ratchet wheel communicates with the bore of the sleeve 8, and in said sleeve and the bore of the ratchet wheel is arranged a bushing 12 held in said sleeve and wheel by means of a set-screw 14 carried by the sleeve 8, the inner end of the set-screw engaging in an annular groove 15 provided therefor in the bushing, the lower end of the bushing being flanged to abut against the lower end of the sleeve 8. This bushing can be readily removed, and another bushing inserted to conform to the size of the pipe to be threaded.

The ratchet wheel carries a circular head 16 provided on its upper face with transversely-extending ribsor guides 17, between which is arranged the cutters 18 secured to the head 16 of the ratchet wheel by setscrews 19, and held. against end thrust during the cutting operation by set screws 20 which are mounted in ears or lugs 21 carried by said circular head 16. These cutters are provided on their inner ends with clearance notches 22, through which the shavings or chips formed during the threading operation pass to the discharge passages 23 provided in the head 16.

In either of the sockets 2 or 3 is mounted a hollow handle member 24 threaded at its inner end into said socket and provided at its outer end with a knurled surface 25 for convenience in operating. In the inner end of this hollow handle member is a hollow threaded plug or bushing 26, and extending through the hollow handle member and said hollow plug or bushing is a pawl in the form of a rod 27, the inner end of the rod being provided with a head 28 having a tooth 29 for engagement with the teeth of the ratchet wheel 7 and the outer end of said rod is provided with a knurled button or head 30 by means of which the rod can be pulled rearwardly in the hollow handle member and the head 28 reversed when desired. In the socket 2 or 3 according to which one has the hollow handle therein is arranged a spring 31, one end of which abuts against the head 28 ,and the other end of which abuts against the inner end of the hollow handle member 251.

By grasping the button 30 and pulling outwardly on the rod 27, the tooth 29 is retracted from engagement with the ratchet wheel and the rod can then be turned up-sidedown, or in other words given a half revolution so as to present the tooth 29 of the ratchet wheel in position to operate the wheel in the reverse direction.

Where desired, an additional hollow handle member 24 can be inserted in the opposite socket member so as to provide two handles for operating the pipe threader when occasion requires.

Having fully described my invention what I claim as new and desire to secure by Letters Patent is,

In a pipe threader, a circular body provided with a centrally arranged chamber, a ratchet wheel mounted in said chamber, a head formed integral with the ratchet Wheel and seated upon the top of said body, said head provided with parallel guides, cutters adjustably mounted between the guides carried by the head, said head provided with lateral discharge passages leading from the space between the guides to the periphery of the head, and means carried by said body and engaging with said wheel for rotating it.

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

MATTHEW DIXON.

Witnesses:

THOMAS DIXON, MAX I-I. SRoLovrrz.

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