US902652A - Tool-holder. - Google Patents

Description

G. E. GREENLEAF & D. H. TEAS. TOOL HOLDER.

APPLICYATION FILED MAY 20,1908.

9%;5552... Patented NOV.3,1l%8.

Witnesses Atmmey UNITED sar turns rarnnr OFFICE}.

GEORGE EDWARD GREENLEAF, OF PLAINFIELD, NEW JERSEY, AND DANIEL HENRY TEAS,

JERSEY CITY, NEW JERSEY.

-1\To. eoacsz.

,Specification of Letters Patent.

NILES BEMENT POND COMPANY, OF

'roonnornna.

Patented Nov. 3, recs.

Application filed May 20, E68. Serial No. 433,325.

To a l whom it may concern:

Be it known that we, GEORGE EDWARD GREENLEAF, a citizen of the United States, residing at Plainfield, Union county, New Jer vsey, and DANIEL HENRY TEAS, a citizen of the United States, residing at New Havep, New Haven county, Connecticut, have invented certain new and useful Improvements in Tool- Holders, of which thesfollowing is a speciiication. v

This invention, relating to tool holders, and devised with particular reference for use on machine tools, will be readily understood from the following description taken in connection with the accompanying drawing in which:

Figure 1 is a plan of a tool holder exemlifying our-present invention: Fig. 2 is a tront elevation of the same: Fig. 3 is a side elevation of the same: and Fig. 4 a vertical longitudinal section.

In the drawing :1, indicates the base of the tool holder: 2, the tool-seat thereof: 3, a stud projecting upwardly from the base, near the tool-seat: 4, a lever loosely fitted on the stud and having one end projecting over the tool-seat: 5, the tool clamped between the tool-seat and one endof the lever: 6, a nut screwed upon the stud over the lever: 7, a washer interposed between the nut and the lever and having a convex lower face to facilitate the rocking motion of the lever: 8, a roller mounted in the long end ofthe lever, the axis of this roller being parallel with the tool-seat and at right angles to the length of the lever: 9, a similar roller journaled in the base below the roller 8: 10, a fluid pressure cylinder mounted on the base below-the level and between the rollers and the stud: 11, the piston of the cylinder 12, a wedge carried by the outer end of the piston-rod and engaging between the two rollers: 13, 'fluid pipe connection to the inner end of the cylinder: 14, a fluid pipe connection to the outer end of the cylinder: and 15, a spring disposed upon the stud below the lever and serving to urge the lever upward.

- The pipe connections are to be in communication with a suitable source of supply of fluid under pressure, say compressed air,

and are to be provided with valvular devices for their control.

The piston and wedge being in their inward osition, and the nut being roperly move upwardly, the spring lifts the s ort end the nut is to be screwed down until t e tool is clamped, and in this operation the grip of; the o erators fingers on the nut is suffi- I cient. Fluid under pressure is then to be ad tted to the inner end of the cylinder, the result being that the wedge is forced outwardly and acts upwardly on the long end of the lever and causes the tool to be gripped with great power. To release the tool, the

ressure from the inner end of the cylinder 1s to be relieved and pressure is to be applied in the outer end of the cylinder, thus retracting the wedge and relieving the heavy pressure on the tool. It is not essential that the nut be mani ulated at each setting of the tool, the we go having a sufficient range of action to not only clam but to properly release the tool, the nut eing brought into action in preliminarily adjusting the lever to suit the tool in hand. The convex washer not only ermits the rocking of the lever in its norma clamping action but also permits such rocking of the lever as may be needed to cause the short end of the lever to take a fair bearing throughout its width on the top of the tool. It will be observed in the illustration that the stud is not located at the mid-width of the lever, being closer to its front edge. This disposition of the stud is not essential but it serves in a plying a superior clamping force to the too near its workin end.

We 0 aim 1. A tool holder comprising, a base, a toolseat thereon, a lever fulcrumed on the base and having its shorter end projecting over the tool-seat so as to clamp a tool thereto, a cylinder secured to the base, a piston therein, a wedge carried by the piston-rod and engaging between the longer end of the lever and a part carried by the base, and fluid connections to the cylinder, combined substantially as set forth.

2. A tool holder comprising, a base, a toolseat thereon, a stud projecting from the base at right angles to the face of the tool-seat, a lever loosely mounted on the stud and hav ing its shorter end projecting over the toolseat so as to clamp a tool thereto, means carried by the stud over the lever to revent its rising, a cylinder secured to the ase, a piston therein, a wedge carried by the pistonrod and engaging between the longer'end of 1 rising, a cylinder secured to the base, a pisthe lever and a part carried by the base, and ton therein, a wedge carried by the pistonfluid connections to the cylinder, combined rod and engaging between the-longer end of substantially asset forth. I the lever and a part carried by the base, and- 5 3. A tool holder comprising, a base, a toolfluid connections. to the cylinder; combined 20 seat tlfiereonl, a studlprfjectilrgrom the base substantially as set forth. atri tan estoteaceotetoo-seata lever loosel ymounted on the stud and haiv- R F? GREENLEAF' ing its shorter end projecting over the 'tool-r BAMBI TEAS 10 seat so as to clamp a tool thereto, the engage- Witnesses as to Greenleaf: ment of the lever with the stud being at a FREDERICK G. LYNN,

oint between the transverse center of the 6120. B. WEAN. ever and theedge of the lever which is to be Witnesses as'to Teas nearest the oint of the tool, means carried H. M. CLEAVER, 15 by the stu over the lever to prevent its CHAS. K. SEYMOUR.

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