US1169594A - Tool-holder. - Google Patents

Description

G.AMBORN.

TOOL HOLDER.

APPLICATION FILED JAN. 4.1.913.

Patented Jan. 25, 1916.

INVENTOR WITNESSES:

By A Ztorneys, L/%Wfl/m 'insirnn srarns earsnr onnrcn GEORGE AltIBORN, OF CHAIPINVILLE, CONNECTICUT, ASSIGNGR TO J. H. WILLIAMS & (30., OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

TOOL-HOLDER.

Specification of Letters Patent.

Patented J an. 25, 1916.

Application filed January 4, 1913. Serial No. 740,102.

To all whom it may concern:

Beit known that I, Gnonon AMBORN, a citizen of the United States, residing in Chapinville, in the county of Litchfield and State of Connecticut, have invented certain new and useful Improvements in Tool-Holders, of which the following is a specification.

This invention aims to provide certain improvements in lathe tool holders. The holder is particularly adapted for special cutters or tools and is provided with one or more shoulders for supporting the head of such a cutter while the shank thereof is clamped in a suitable opening in the head of the holder. An improved clamping means for the tool holders is provided in the form of a cam member of special design and mounted in very simple way in the head of the holder.

Figure l is a plan; Fig. 2 an end elevation, and Figs. 3 and 4: longitudinal and cross-sections respectively of one type of tool holder. Figs. 5, 6 and 7 are respectively a plan, side elevation and end elevation of another style. Fig. 8 is a vertical cross-section of a holder showing a modified style of cam member of the same general class as in the other figures (this figure being taken from my prior application No. 684,980 filed March 20, 1912).

Referring to the embodiments of the invention illustrated, and first to Figs. 1 to 4, the tool holder A has a head B with an opening C therein extending approximately longitudinally, With its outer end slightly elevated. The lower part of the head 13 projects forward to form a shoulder which supports the head of the tool. A cam D, arranged in the head rotates on an axis transverse thereto and serves to clamp the shank E of the tool in the opening C. The outer end of the head is cut away at the top so as to form shoulders F on opposite sides of the open groove G which is formed by extending the lower part of the opening C.

A holder of this style is adapted to take either right-handed or left-handed special cutters or tools, and can also take straight, regular cutters of the ordinary stock designs. The holder is shown carrying a special lefthanded cutter having a shank E which fits the opening C. The head F of the tool has its lower part fitting in the groove G which constitutes an extension of the longitudinal opening C; the head having a laterally-oifset portion H which bears upon the shoulder F.

The cam D is formed on its ends with a pair of bearing rings J and K journaled in the head of the holder near its opposite side faces, the cam being held in place by means of a wire L fitting in half-round grooves in the bearing K and the head B respectively.

The design of Figs. 5, 6 and 7 shows a holder A" the head M of which has a longitudinal opening N which, iowever, is open to one of the side faces of the holder, as indicated in Fig. 7. The cam D is the same as in the previous figures. This holder may be made either right-handed or left-handed, out not both, the design shown being righthanded. The shank E of the tool is clamped in the groove N by means of the cam D while the head 0 of the tool bears upon the shoulder P formed by extending the lower partof the head of the holder. The back face of the tool is also supported by the side portion Q of the head of the tool which is extended to form a shoulder as shown in Fig. 5.

The cam may be fastened as shown in Fig. by means of a single wire ring L. or a ring of this sort may be used near each end of the cam member. Or, as shown in Fig. 8, the cam D may be provided with a flange R bearing against one face of the holder, the opposite end of the member projecting slightly through the head B of the holder and being held by a wire ring S in a groovein the cam member. A squared or otherwise non-circular head T may be provided for turning tl e cam where there is no objection to the existence of such a projection upon the side of the holder. I prefer, how ever, to have the two ends of the member substantially flush with (or depressed below) the side faces of the holder so as to avoid any substantial projections. A substantially flush construction is shown at both ends of the cam member in Fig. 4. The cam is turned by a polygonal socket T which passes clear through from end to end of the cam member as in Fig. 4, or a polygonal socket T (Fig. 8) which passes only part way through the cam member. In the preferred construction the socket passes entirely through the member, and may be slightly flared at the ends so that the tool may be easily introduced and will come to a bearing (in turning the cam) first upon points of the member which are between its supporting bearing ends. The fact that the wrench bears upon the cam member between the bearing ends J and K of the cam member increases the durability of the latter in good condition, diminishes the wear on the socket, and makes it easier to bring the cam to a good clampmg action on the shank of the tool. By running the socket entirely throughand making the mouth of the socket bell-shaped the strain willcome morein the center of the cam, and will thus prevent cracking or checking when hardened.

Nhat I claim is l. A tool-holder having a one-piece head with an opening therein extending longitudinally and adapted to embrace the shank of with an opening therein extending longitudinally and adapted to receive the shank of a tool, the sides of said head projecting forward'beyond the upper part and forming horizontal shoulders on opposite sides of said opening to form supports for the laterally projecting heads of both right-handed 'and'left-ha'nded tools, and means bearing directly on the shank of the tool for clamping the tool in place.

3.-A tool holder having'a one-piece head B with an opening C therein extending longitudinally and adapted to receive the shank of-a tool, the-lower part of said head projectingforward and forming horizontal shouldersF at opposite sides of the head of the tool'in planes above the bottom of said opemng, and a cam D extendlng horlzontally through the head of said holder and serving to clamp said tool in place.

5. A tool holder provided with clamping means comprising a cam member extending entirely through the holder, and having a polygonal socket extending entirely throughsuch cam member, so as to be accessible at the middle of the axial length of the cam and from both sides of the holder.

6. A tool holder provided with clamping means comprising a cam member extending entirely through the holder, and having a polygonal socket extending entirely through such cam member so as to be accessible at the middle of the axial length of the cam and from both sides of the holder, said cam member having a central cam and having end bearings on opposite sides of said central cam.

7. A tool holder having a clamping means including a cam member having a rotary bearin'gnear its end and having a cam face located inwardly of said bearing, said cam member having a polygonal socket which is slightly flared to permit the easy insertion of a wrench head and to bring the wrench head to a bearing on a portion of the cam member within the rotary bearing of said member.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

GEORGE AMBORN. WVitnesses CHARLES 'B. HARRIS, WVILLIAM'G. COLE,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. I

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