US674105A - Screw-cutting stock and die. - Google Patents

Description

No. 674,l05. Patented May'l4,- I90l. E. TIMM.

SCREW CUTTING STOCK AND DIE.

(Application filed Nov. 8, 1900.)

(No llo' del.)

ummn Eg/u Jjmm UNITED STATES PATENT OFFICE.

EZRA TIMM, OF OSCEOLA, NEBRASKA.

SCREW-CUTTING STOCK 'AND DIE.

SPECIFICATION forming part of Letters Patent No. 674,105, dated May 14, 1901.-

Application filed November 8, 1900. v b 'erial No. 35.8 (No model.)

To all whom it may concern:

Be it known that I, EZRA TIMM, a citizen of the United States, residing at Osceola, in the county of Polk and State of Nebraska, have invented certain new and useful Improvements in Screw-Cutting Stocks and Dies; and I do 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.

This invention relates to improvements in screw cutting stocks and dies for screwthreading pipes, rods, and other like objects. The invention has for its object to provide a die-stock which may be quickly applied and removed and accurately adjusted, to provide improved means for securing the dies to the stock to adapt the same to be easily and expeditiously attached and detached, to provide for the use of auxiliary dies in connection with the main dies for threading smaller objects than said main dies are adapted for,

and to generally simplify and improve the construction and increase the-practical efficiency of devices of this character.

With this and other minor objects inview the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be hereinafter more fully described, and particularly pointed out in the appended claims.

In the accompanyingdrawings, Figure 1 is a perspective view'of a screw-threadingdevice embodying my invention, showing the jaws of the stock open. Fig. 2 is a sectional view on line 2 2 of Fig. 1, showing .the jaws closed. Fig. 3 is asection through one. of the jaws and main dies on line of the dovetailed rib and dowel-pin. Fig'. 4 is a front elevation of one of the die members. Fig. 5 is a rear perspective view thereof.

Referring now more particularly to the ,drawings, the numerals 1 and 2 represent the semicircular jaws of an ordinary split diestock, each of which is provided with a socket 3 for the reception ofan operating-handle 4, whereby the device is turned on the pipe or rod to be threaded. At one side of the stock the meeting ends of the jaws are hinged or piyotally connected by a pivot pin or bolt 5, and the opposite or free ends of the jaws are provided with spaced pairs of lugs 6 and 7.

Between the lugs 6is pivoted a locking-bolt 8, which is adapted to swing down between the lugs 7 and to be held in such position to thereon and adapted to, bear upon the outer faces of said lugs 7. When it is desired to open the jaws, the nut is loosened and the bolt thrown back, as shown in Fig. 1. v To prevent the bolt from moving too far back, the pivoted end thereof is formed with a cam-head 10, which binds upon the jaw and also abuts against a stop-shoulder 11, thereby prevent ing the bolt from passing rearward of a position perpendicular to its axis. The pivot pin or bolt 5 is preferably tapered, so that it may be adjusted to compensate for wear and provide for a close fitting at all times of the hinged end of the jaws.

The dies 12 and 13, which for convenience of description will be hereinafter termed the main dies, are adapted to be secured to the jaws to open and close to admit the pipe or other object to be threaded between them with the thread-cutting.portionsor die-faces 14. These die faces extend part way across the meeting faces of the main dies and terminate alongside dovetailed sockets 15, 0ccupying the remaining transverse extent of said meeting faces. In these sockets are are gaged to thread smaller-sized objects than the said die-faces 14, and said auxiliary dies are adjustable outwardly through the meit is desired to thread pipes or rods of smaller diameter than the main dies are designed for the sockets 15, thus adapting the "device to be quickly and conveniently fitted for threading rods or'pipes of difierent sizes. 1

The main dies 12 and 13 are soon red in such a manner as to facilitate their application dies is provided on itsconvex face-with a dovetailed rib 18 and dowel-pin 19', located rib 18 is adapted toenter a dovetailed groove 21, formed on the inner face of the cooperating jaw of the stock, the said groove 20 being lock the jaws closed by a wing-nut 9, tapped and to release said pipe and are proyided,

slidably fitted dovetailed auxiliary dies 16,. whose thread-cutting portions or die-faces and removal, and to this end each of said at or adjacent to opposite ends thereof. Thediu'm oftapered adj usting-screws 17. When 20 and the dowel-pin 19 to enter a seat-groove 9 threading, the auxiliary dies are slipped into located at the free end of the jaw and the seat-groove 21 at the hinged end thereof. To apply the main die to the jaw, the inner end of the rib is first slipped into the groove 20 and slid downward until the pin 19 comes in line with the upper end of the seat-groove 21, when the pin is fitted in said seat'groove and the die then slid downward into proper position. By this construction a simple and secure fastening is provided and the main die adapted to be readily and quickly connected to and disconnected from the jaw.

From the foregoing description, taken in connection with the accompanying drawings, the construction, mode of operation, and advantages of the invention will be readily understood, and it will be seen that a convenient and efficient form of threading implement is provided.

Changes in the form, proportion, and minor details of construction may be made within the scope of the invention without departing from the spirit or sacrificing any of the advantages thereof.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. In a screw-threading device, the combi nation of a stock having hinged segmental jaws provided on their inner faces with upper and lower grooves, the upper grooves be ing dovetailed, and segmental dies having dovetailed ribs to engage the upper grooves and dowel-pins to engage the lower grooves, substantially as set forth.

2. In a screw-threading stock and die, the combination of a stock having hinged segmental jaws provided on their inner faces with upper and lower grooves, the upper grooves being dovetailed, segmental dies having dovetailed ribs to engage the upper grooves, and dowel-pins to engage the lower grooves, said dies being also provided with a screw-threading surface extending part way across the face thereof, a dovetailed socket occupying the remaining extent of said face and open to the exterior on one side, an auxiliary screw-threaded die having dovetailed portions to fit within said socket, and a tapered screw for securing said auxiliary die, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EZRA TIMM.

Witnesses:

W. S. MILLER, A. A. GRAY.

Images