US1330514A - Tool-holder - Google Patents

Description

W. C. BROOKS.

TOOL HOLDER.

APPLICATION FILED MAY 21. m9.

Patented Feb. 10, 1920.

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WI TNESS:

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PATENT OFFICE.

UNITED STATES WALTER C. BROOKS, OF SPRINGFIELD, MASSACHUSETTS.

TOOL-HOLDER.

Specification of Letters Patent.

Patented. Feb. 10, 1920.

Application filed May 21, 1919. Serial N0. 298,766.

To all whom it may concern:

Be it known that I, WALTER C. BROOKS, a citizen of the United States of America, and a resident of Springfield, in the county of Hampden and State of Massachusetts,-

pensive, compact, convenient, strong and.

durable holder, which is capable of being secured in place either by means of a bolt passing through the body of said holder, or by magnetic means, and which at the same time is adapted to hold securely in the proper manner at the correct angle any one of various cutting tools while the tool is being ground.

Other objects and advantages will appear in the course of the following description.

I attain the objects and secure the advantages of my invention by the means illustrated in the accompanying drawings, in which- Figure 1 is a top plan of a tool holder which embodies a practical form of my invention; Fig. 2, a side elevation of said holder; Fig. '3, an elevation of the boringtool end of the holder, showing such a tool in place therein; Fig. i, an elevation of the turning-tool end of the holder, showing such a tool in place therein, and, Fig. 5, a vertical section through the body or block of the holder, taken through the transverse passages therein.

Similar reference characters designate similar parts throughout the several views.

Although the holder block more often rests on some one of its side faces than on its bottom while in use, for the purpose generally of this description, such block is assumed to rest on such bottom, as shown; and the tools represented as being secured in the holder, in Figs. 3 and 4, may not be disposed to the best advantage for grinding, but their presence serves to illustrate clearly the manner in which they are held in place.

My tool holder comprises a block 1, a vertical clamp 2 mounted. on a pin 3 and a clamp screw t at one end of said block, a horizontal cross-piece 5 at the other end of said block, and a clamping screw 6 tapped into and through such cross-piece.

' The block 1 has a top and bottom which are parallel with each other, sides which converge from the central horizontal plane of said block toward said top and bottom, an end that is at right-angles to said top and bottom, and an end that inclines downwardly and outwardly from said top. There is a transverse, V-shaped groove 7 in the perpendicular end near the top of the block 1,

and a channel 8 in the center of the inclined or oblique end of said block. The channel 8 extends from the top of the block 1 to the bottom of said block on to a cutaway por- .tion 9 thereof at the lower end of said chanblock from the inclined faces on one side to the inclined faces on the other side, all of said passages intersecting within the block, as best shown in Fig. 5. Each passage 11 extends from an upper inclined face on one .side to the lower inclined face on the opposite side of the block, and is at right-angles .to such faces, which latter are parallel with each other. The passage 10 is at right- 7 angles to the top and bottom of the block.

These passages are designed to receive bolts for securing the block in place on the grinding-machine, as presently will be more fully explained, and should be located far enough from the oblique end of the block so that a bolt (not shown) in the passage 10 and a tool (as 12) in the channel 8 do not interfere with each other.

The pin 3 projects from the perpendicular end of the block 1, in the longitudinal, central, vertical plane and below the horizontal, central plane of said block, and the screw l is tapped into said block directly over said pin and above said last-named plane. The pin 3 is received in a hole 13, Fig. 3, in the clamp 2, which hole is near the lower end of said clamp and large enough to permit the clamp to move to the extent necessary in the clamping operation. The screw 1 passes through the approximate center of the clamp 2, and may be rotated freely therein. The upper end of the clamp 2 is adjacent to the groove 7 The clamp 2 has on the inner side at the top and bottom, respectively, projections or ribs 1st and 15, the latter being designed to bear against the contiguous end of the block and the former to bear on a tool (as 16) in the groove 7, when thescrew l: is tightened.

The tool 16, shown in Fig. 3 and having a portion of its stem broken out, is an ordinary boring tool, and, when the:samezis-toibe ground, it is placed in the groove 7 and properly adjusted therein, and the screw 4 is tightened to force therib 14 of the clamp 2 hard against said tool, the rib 15 of said clamp meanwhile bearing directly on the block 1. =Ready aneans are thus afforded for properly positioning and se curely holding the tool 16. Said toolis released by loosening the screws and removed by withdrawing it'fronr' the groove7. The pin 3 prevents the clamp '2 from turning on or with the screw t during the tightening and loosening operations.

The cross-piece 5' has the general form of an inverted T. Said cross-piece spans the channel 8, and the lateral arms of the crosspiece are secured to the block 1 by means of two screws" 17 which pass through such arms into the contiguous end of said block. 'The screw 6 is carried by the upstanding arm of thecross-pieceo. Any tool not too large to enter the channel 8' and be received behind the cross-piece 5 maybe secured in place in said channel. In other words, the tool in question need not fill the channel 8.

The tool 12, shown inFig; 4t and which is an ordinary turning tool, is slipped into the channel 8 and secured therein by. the screw 6, when it is'desired to grind such tool. The tool 12, is placed with one side against one side of the channel 8 andgiven 'the'desired amount of projection before tightening the screw 6 against the contiguous side thereof. Said tool must, of course, be so; placed in thegroove 8 that the sharp edge of the tool is in a plane; parallel with that of the top of the block 1. Upon loosening the screw 6 the tool 12 can be slipped out of the groove 8. Thus ready means are provided for properly positioning and securely holding the tool 12.

For grinding the tool 16, the block 1 is placed on the oblique face thereof which is the more remote from but on the same side with thecutting end and the part of said tool thatis to be ground. "The block isheld in this position on or in the grinding machine, while the tool is ground, by magnetic means, or by a bolt' passing through the passage 11 thatopens throughthe aforesaid oblique face, as the case maybe. The angle of this face'corresponds withor determines the angle of theground' part of the tool 16.

For grinding the tool 16, the block 1 is first placedon the oblique facethereof which is-most rem.0tefr0m the "side of the cutting part of said tool that is to be ground first.

The block is held in this position in the grinding machine, while the aforesaid side of the cutting part of the tool is ground, by

.ma 'netic means or b r a screw )assin b 7 to through the passage 11 that opens through the aforesaid oblique face. The block is then turned over and placed on the oblique face which is-most remote from the side of the cutting part of the tool that is to be ground next. The block is held in this latter position, while the said-side of the cutting part of the tool is ground, by magnetic means, or by a screw passing through the other passage 11. The angles of the oblique faces of the block correspond with or determine the angles of the ground sides of the cutting part of the tool 12.

Hit bedesired to grind oil the sharp edge of the tool 12, or to grind the ridge of va tool of this character, the block is set on its bottom in the grinding n'iachine and held by magnetic means or by a -bolt passing -mounting the block 1 on a horizontal, supporting member of the grinding machine,

but said block might be mounted otherwise, if necessary, in order to meet other conditions, as in a machine the work-holdingand grinding elements of which are: arranged. differently relatively from those in an ordinary grinder.

'Moreorless modification and change may -beimade in the shape, size, construction, and

arrangement of some or all of the parts of my tool holder, without departing from the "spirit of my invention, or exceeding the scope of what is claimed.

WVhatI claim as my invention, and desire to' secure by Letters Patent, is

1. A tool holder, of the class described, comprisinga block the sides of which convergefrom .the approximately central horizontal plane toward the top and bottom of said block,- said top and bottom being parallel, one end of said block being at rightangles to said top and bottom, and the other end of said block being oblique, and toolclamping means at such ends.

2. A tool holder, of the class specified, comprising a solid block flat on the top and bottom and having sides which converge from the approximately central horizontal plane of said block toward said top and bottom, said block having bolt-receiving passages-which open through the four converg- 111g faces of said s1des,-and-end tool-clamping means.

A tool holder,-of the class described, comprising a solid block, the top and bottom of which are fiat and parallel, said block having a bolt-receiving passage which opens through said top and bottom, and means to clamp a tool to one end of said block.

4. A tool holder, of the class described, comprising a solid block the sides of which converge from the approximately central horizontal plane toward the top and bottom of said block, said to and bottom being parallel, and said blocE having bolt-receiving passage which open through the converging faces of said. sides and through said top and bottom, and end tool-clamping means.

5. A tool holder, of the class described, comprising a block having oblique sides and a. transverse approximately V-shaped groove in one end, and clamping means at such end adapted to engage a tool placed in said groove.

6. A tool holder, of the class described, comprising a block having oblique sides and a transverse approximately V-shaped groove in one end, and provided at such end with a pin, a clamp mounted on said pin, and a screw passing through said clamp and tapped into said block, the free end of said clamp being adjacent to said groove.

7. A tool holder, of the class described, comprising a block having oblique sides and an oblique end and a longitudinal channel in such end, and clamping means at such end adapted to engage a tool placed in said channel.

8. A tool holder, of the class described, comprising a block havin oblique sides and an oblique channeled en a cross-piece secured to such end across the channel therein,

of said block having a downward and outward inclination from said top, and also having a channel extending lengthwise thereof, a pin and screw projecting from said first-named end, a clamp mounted on said pin and screw and adapted to engage a tool 1n said groove, a cross-piece at said second-named end, and a screw carried by said cross-piece and adapted to engage a tool in said channel.

WALTER G. BROOKS. Witnesses:

F. A. CUTTER, ARTHUR A. BETH.

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