US1142411A - Hand-operated threading-die. - Google Patents

Description

H. L. FISHER.

HAND OPERATED THREADING DIE.

APPLICATION men Ammo". 1912.

1,142,41 1 Patented June 8, 1915.

WITNESS S d I INVENTOR rah-9,44 BM-Q4525, A7 w HENRY I1. FISHER, 0F WAYNESBORO, PENNSYLVANIA, ASSIGNOR TO LANDIS MACHINE COMPANY, OF WAYNESBORO, PENNSYLVANIA, A CORPORATION.

HAND-OPERATED THREADING-DIE.

Specification of Letters Patent.

Patented June 8, 1915.

Application filed August 20, 1912. Serial No. 716,093.

hand tools as well as other advantages, allas will'be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate slmilar parts, Figure 1 is a face elevation of one of my improved cutter heads as adjusted for use, Fig. 2 a sectional view on the dotted line 22 in Fig. 1, Fig. 3 a sectional view on the dotted line 3-3 in Fig. 1, Fig. 4 a detail section on the dotted line 44 in Fig. 1, and Fig. 5 a view similar to.a portion of Fig. 2 illustrating a modified construction.

In said drawings the portions marked A represent the frame in which the cutter head proper is mounted, B the body of said cutter head, and C the cutters or chasers.

The frame A comprises a central ring of appropriate form and sufficient strengthfor the purpose, having handles a projecting from diametrically opposite sides thereof by which the tool may be turned. Said handles are shown broken off in Fig. 1 but in the tool will be extended to the length appropriate for she purpose, as will be readily understoo The body B of the die is of cylindrical form, its periphery being turned to seat snugly in the frame A in which it is secured by a clamping screw 10, the conical point of which is adapted to seat in a conical socket 11 in the periphery of said body. From the front face of said body branches or arnfs 7) project outward a distance so that their outer ends will be somewhat beyond the outside edge of chasers C. The faces of said arms are formed concave and their extreme ,outer ends 13 are flared outward slightly to facilitate centering the tool on the work. From said tapered faces 13 said arms are formed with grooves corresponding to the cutting grooves in the chasers G which serve as means for leading the work into the die, or the die onto the work. Said grooves extend not only the length of the arms I) but also for a distance into the body B, or through that portion of the body which cor responds in size to the size of the work. As shown, there are two of said arms I) extending beyond the edges of chasers C, and a third arm 6 which does not extendto the cutting edge of said chasers, but projects nearly to said cutting edge, its face being formed correspondingly to the faces of the arm 6. A diametrical slot .9 extends through body A from one side to-near the other side and the .machine screw 14 extends through a radially projecting arm 6 on one side thereof and engages with screw threads in the base of the adjacent arm I) thus providing a means for slightly adjusting the size of the into the die are formed in a separate sleeve 13 secured in position by means of a set screw 15. Such a construction will be found desirable where a single body is desired for use to out work of various sizes. As will be seen, by removing one sleeve 6 of one size and inserting anothersleeve of a differentsize the tool will be adapted for different sizes of work and as many sleeves of varying sizes as desired may be provided for each body.

Outwardly projecting arms 16 are'formed on the front face of body B adapted to serve as cutter holders for the cutters C. Said said recesses and their outer edges are formed with a out under shoulder 17 with which a clamping plate 18, similarly formed,

engages.

the cutter firmly against the seat at. the inner edge of the recess, but also draws it back tightly and secures it rigidly upon the bottom of said recess. .Screws c are mounted in screw-threaded perforations in the corners of the cutter holders and bear upon the cutters C for the purpose of adjusting them longitudinally and securing them in adjusted positions. By this construction of cutter head, as will be readily seen, the cutters C are mounted and extend tangentially with the work, and being formed with cutting grooves in their faces extending from end to end thereof are. adapted to be fed to the work'by the screws 0 as they wear away, thus providing a tool of long life and securing to the hand tool the well known advantages of this character of a cutter heretofore-used in machines. i

' Having thusfully described my said invention What ll claim as new and desire to secure by Letters Patent is:

1. A cutter-head comprising a frame having handles extending outwardly therefrom, a die body mounted in said frame formed with arms extending outwardly from its face to a point beyond the cutters and tapered at their outer ends to center on the work, said arms being formed with threads or grooves in their faces to serve as means for leading the workinto the die, and tan gential cutters mounted on the face of said power driven screw cutting body with their cutting ends adjacent to the grooves in said arms, substantially as set forth.

Ahand-operated threading die comprising a frame with operating handles, a die body secured therein, cutters carried on the face of said die body extending tangenscrews 19- extend 3. A hand-operated threading die comprising a frame having operating handles, a die body mounted in said frame and formed with a diametrical slot, meansfor contracting or expanding said slot, cutters mounted on the face of said body extending tangentially to the work, arms projecting from the face of said body toobeyond the outer edges of said cutters and formed with concave faces grooved to correspond with the grooves in said cutters, and means for clamping and adjusting said cutters in position, substantially as set forth.

4:. A hand-operated threading die comprising a frame, a body secured in said frame, tangential cutters mounted on said body, projecting arms on the face of said body formed with threads for leading the work into said body, said threads continuing for a distance within said body,"substantially as set forth.

5. A hand operated threadingdie comprising a frame, a die body therein formed with a central screw-threaded aperture and with members projecting forward from the outer face of said body with their inner edges in line with said aperture, and with threads in said edges which are a continuation of the threads in said aperture, and cutters secured tangentially to the work on said body between the adjacent edges of said projecting members, whereby the work is received, guided, and supported by said members during the operation of threading, substantially as set forth.

In witness whereof, I have. hereunto set my hand and seal at VVaynesboro, Pennsylvania this 17th day of August, A. D. nineteen hundred and twelve.

I HENRY L. FISHER. [Ls] Witnesses:

JOHN Gr/BENEDICT, IRA D. GROVE.

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