US665303A - Tool or cutter holder for grinding-machines. - Google Patents

Description

.No. 665,303. Patented Jan. |9m.

I J. BATH.

TOOL 0B CUTTER HOLDER FDR GBINDING MACHINES. (A umiim filed July 28, 1900.)

(No Model.) 3- Sheets-Sheet \A/I'T'NEEEEE: I Z37 I I Patented Ian. I, 190i.

' J. BATH. TOOL 0R CUTTER HOLDER-FOB GRINDING MACHINES.

3 Sheets-Sheet 2.

(N0 Model.)

Lu N mm E .6QM 5 No. 665,303. Patented Ian. IBM.

J. BATH. TOOL 0R CUTTER HOLDER FOB GRINDING MACHINES. (Application filed July 28, 1900.)

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UNITED STATES PATENT QFFICE.

JOHN BATH, OF WORCESTER, MASSACHUSETTS.

TOOL OR CUTTER HOLDER FOR GRINDING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 665,303, dated January 1, 1901.

Application filed July 28, 1900. Serial No. 25,131. \No model.)

To all whom it may concern.-

Be it known that 1, JOHN BATH, a citizen of the United States, residing in Worcester, in the county of Worcester and State of Massachusetts, have invented new and useful Improvements in Tool or Cutter Holders for Grinding-Machines, of which the following is a specification. 4

This invention relates to that class of attachments for grinding-machines adapted for holding the tools or cutters and presenting their cutting edges to the grinding-wheel; and the invention consists of certain novel constructions and arrangements of parts, whereby the tools or cutters may be held in a great variety of positions by reason of the variety and number of adjustments of which the holder is capable.

The nature of the invention is fully described in detail below and illustrated in the accompanying drawings, in which- Figure 1 is a rear elevation of my improved attachment or holder with a cutter or tool in position to be ground. Fig. 2 is a longitudinal vertical section of the same looking toward the rear-that is, toward the side from which the cutting edge of the tool extends. Fig. 3 is a plan view'showing the parts so adjusted as to present a tool to the emery-wheel at a particular angle for grinding off the corner of one of the cutters. Fig. at is a perspective view of a block adapted to be laid in the trough.

Similar letters of reference indicate corresponding parts.

a represents the square or rectangular base of the holder, said base being provided with one or more slots at, whereby it is secured to a suitably slotted or grooved bed 1), making a part of the grinding-machine, a sufficient portion of said bed being shown to illustrate the connection of the holder with the machine. The rectangular shape of the base allows it to be adjusted in position with relation to the bed by means of a try-square or other instrument adapted to determine whether the side of the base is parallel with the side of the bed or at what angle it is with relation thereto. The base a is held in position by a clamping-screw (1, whose head (1 lies in the groove 1) and which extends up through the slot a and is engaged by the nut e, provided with a suitable handle e.

Integral with the base a. is a standard A, horizontally bored at A to receive the horizontal holder B, whose portion B has its bearings in said bore, thus allowing the rotation of the holder on a vertical plane. This swiveled holder B is held in any desired position in the standard by the screw 0, provided with the large and broad head or handle 0, adapted to be screwed against a suitable washer O. The horizontal holder B is vertically or rectangular-1y bored at B to receive the round stem E, supporting and integral with the trough E, in which the shanks, as F, of the tools or cutters, as F, lie when said cutters are being ground. This stem, and hence of course the trough E, is adjustable both rotatively and as to height and is held in any desired position by the screw f, which sets against the washer f, as illustrated in Fig. 2. By means of these two swivel-joints and the vertical and horizontal adjustments above described any desired angle, whether vertical, horizontal, or a combination of the two, may be obtained, so that surfaces may be presented to the emery-wheel S, which it has not, so far asI am aware, been found practicable to grind up to the present time. It is impossible of course to illustrate the different positions attainable by this contrivance or the m any tools which can be ground by its means. The position shown in Fig. 3 is, however, one in which the tool illustrated can be ground at points which have heretofore been found very difficult, if not impossible, to operate upon. The length of the stem E, the closeness of the axial line of the trough to the tool being ground, and the length of the holder B all serve to enable the machine to apply a short or long radius or bevel, as desired. The fact that the swiveling-point of the trough E is at so great a distance from the point at which the bed a is connected with the' machine, in connection with the fact that the trough is raised to such a height from said bed, enables the operator to cut an exceedingly small bevel without danger of the holder in its movements for adj ustment coming in contact with any part of the machine. It is evident that the swivel-stem can make a complete circle, and hence the variety and number of angles and adjustments are almost unlimited.

H is a collar held adj ust-ably on the stem E by a suitable clamping-handle H, said collar being provided with an integral vertical socket or gage-holder H, in which a vertical gage-rod his adjustably secured. This gage-rod extends up against the tool or instrument to be ground and prevents rotative movement.

One side of the trough E is provided with an integral wing E, which is horizontally tapped to receive the threaded portion of a screw I, which constitutes a horizontal hearing for a swiveled block J, provided with two horizontal holes J. By means of a pivot J in one of these holes the shank portion K of a jaw K is pivotally connected with the block, so as to swing therefrom in a vertical plane. By means of a suitable handle K this jaw is swung upon and off the tool or cutter to be ground, while its free edge is 'held down upon the work by an engaging ring or dog L, which is free to slide on the plain portion of the vertical screw P, which extends down through the slot 7c in the jaw K and screws into the block J. The lower front edge of this dog L is provided with teeth L, which are adapted to engage with corresponding teeth It on opposite sides of the slot in the jaw K. The screw P is provided with a nut L", the rotation of which jams the ring or dogL down into engagement with the jaw K. The jaw may be pivoted to the block J by means of either of the holes J, according to the range of movement desired and the tool to be operated upon. On the opposite sides of the block J are bosses R, into either one of which may be screwed the gage-rod T, such gage-rod extending at right angles from the side of the block and being exactly parallel with the gripping edge of the jaw K. On this gage-rod is a sliding clamp U, which by means of a shank U supports a head or holder U", which is bored to receive the stem 7 of the V-shaped gage V. This stem is held adjustablyin position by a screw v. The end of the shank of the tool rests in the V-shaped gage, as shown in Fig. 3, and as the tool is turned to present a different face to the cutter the gage accommodates itself thereto. Hence the gage-rod is always parallel with the front edge of the aw.

By means of the pivot I the jaw will conform itself to the general line of the work to be ground and can then be pressed upon said work by the screw P and dog L. The work is easily released by loosening the nut L.

The parts A and B may be provided with suitable scales at V and V, respectively, in

order to determine the relative rotation of the parts 13 and E.

In Fig. 4, W represents a block made V- shaped, so as to lie in the bottom of the trough E, said block being provided with the hole W. When the tool to be operated upon has a very short shank, such a block is laid in the trough and screwed into position by means of a screw in the hole Y, Fig. 2, and the shank of the tool is set against it.

Having thus fully described myinvention, what I claim, and desire to secure by Letters Patent, is

1. In a tool and cutter holder for grindingmachines, the slotted base (L, a; the upright A extending vertically and rigidly from said base and horizontally bored at A; the horizontal holder 13 formed with the portion B having its bearings in the bore in said upright and thereby revolving in a vertical plane, said holder being provided with the vertical or transverse bore B; the trough E provided with the stem E extending at right angles therewith and into the bore B; the vertical pivot (1 extending through the slot at; and a horizontally-grooved bed adapted to receive the head of said pivot, whereby the holder is adapted to be rotated in a vertical plane in the upright, the stem of the trough is adapted to be rotated in a plane which is at right angles with the plane of the rotation of the holder, the upright is adapted to be rotated around the adjustable pivot carrying with it the holder, stem and trough, and the base a is adapted to be adjusted horizontally rotatively and in a straight line without disturbing the adjustment of the holder or stem and trough or losing the alinement oi the block swiveled to the trough, substantially as set forth.

2. In a tool and cutter holder fol-grindingmachines, the upright A adapted to be pivotally secured to a bed; the horizontal holder 13 swiveled to said upright; the trough and stem E, E swiveled in the holder; the block J swiveled to the trough and adapted thereby to be rotated in a plane at right angles with the plane of the rotation of the trough; and the shank K and jaw K pivotally connected with the block and thereby adapted to rotate on a plane which is at right angles with the plane of rotation of the block, substantially as described.

3. In a tool and cutter holder for grindingmachines, a holder rotatively supported by the frame of the machine; the trough E swiveled to the holder as described; a block pivotally supported by said trough whereby it is rotated in a plane which is at right angles with the plane of rotation of the trough; a jaw pivotally supported by the block whereby it is rotated in a plane which is substantially at right angles with the plane of rotation of the block; the gage-rod T extending from the block at right angles therewith, and the sliding gage comprising the shank U, head or holder U and gage supported by said head or holder adapted to engage the end of the shank of the tool resting in the trough, substantially as set forth.

4. In a tool and cutter holder for grindingmachines, a trough as E swiveled to a holder which is rotatively supported by the frame of the machine; a block pivotally supported by said trough; a jaw pivotally supported by the block and rotating in a plane which is substantially at right angles with the plane of the rotation of the block; a gage-rod extending from the block at substantially right angles thereto; a head or holder supported by the gage-rod; and a gage sWiveled in the head or holder and provided with a substantially V-shaped notch or recess for the reception of the end of the shank of the tool or cutter, substantially as set forth.

5. In a tool and cutter holder for grindingmachines, in combination with the rotative trough E and a suitable holder therefor; the

wing E extending horizontally from one side Wall of the trough and at substantially right angles therewith; the block J swiveled to said wing and adapted thereby to be rotated in a plane at right angles with the plane of rotation of the trough; and the integral shank K and jaw K pivotally connected with the block and thereby adapted to rotate on a plane which is substantially at right angles with the plane of the rotation of the block, substantially as described.

JOHN BATH. Witnesses:

HENRY W. WILLIAMS. A. N. BONNEY.

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