US121766A

US121766A - Improvement in tool-holders for grinders

Info

Publication number: US121766A
Authority: US
Publication date: 1871-12-12
Anticipated expiration: 1888-12-12

Description

EDWARD F.EDGECOMB.

Patented Dec. 1,2, 1871.

ituwm. @i i gamin W/@ UNITED STATES PATENT QEEICE.

EDWARD F. EDGECOMB, OF MEGHANICS FALLS, MAINE.

IMPROVEMENT IN TOOL-HOLDERS FOR GRINDERS.

Specication forming part of Letters Patent No. 121,766, dated December 12, 1871.

To all whom t may concern:

Be it known that I, EDWARD F. EDGEOOMB, of Mechanics Falls, in the county of Androscoggin and State of Maine, have invented a new and useful Improved rFool Holder for Grindstones; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilledV in the art to make and use the same, reference being had to the accompanying drawing forming a part of this specification.

My invention consists of a stand to rest on the grindstone-frame by a cross-bar fitted in bearings to hold it in a leaning position and allow it to be adjusted sidewise, on the. top of which stand is an oscillating beam with an adjusting-screw, and on the beam is a tool-holding clamp inclining still more toward the stone and pivoted to the said oscillatin g beam so that it may be oscillated to grind the tool rounding on the end, all as hereinafter more fully described.

Figure l is a sectional elevation of my improved tool-holder and side elevation of part of a grindstone, the section being taken on the line m a' of Fig. 2. Fig. 2 is a front elevation, and Fig. 3 is a section of Fig. l on the line y y.

Similarletters of" reference indicate corresponding parts.

A is the stand, which has a cross-bar, B, at the lower end, resting in the bearin gs C npon the top ofthe grindstone-frame D, n ear one end and fronting the face of the stone, the arrangement being such thatthe stand can be readily shifted sidewise. E is an oscillating beam at the top of the stand, with an arm, F, projecting frontwise, to be acted on by an adjusting-screw, G, which screws up and down through the cross-piece H to raise and lower the arm and oscillate the beam E. I is a tool-holding clamp pivoted at K to the beam E, and adjusted so as .to pitch forward toward the face of the stone at the top. It is provided with a binding-screw, L, at the upper end, under which the tool is placed and clamped down tight, to be held on the stone. This holder, having a tool placed in it--say a plane ironand resting in the bearings O, will be leaned toward the stone till the tool comes in contact with it. Then the adjustin g-screw G will be screwed up or down, according as to whether the edge is to be blunt or thin, and then the holder will be pressed against the stone by hand; or this may be done by aweight suspended from the beam E, as indicated by the dotted line M. The holder' may be shifted sidewise on the bearings to grind evenly on both sides of the stone, and if' the edge is to be slightly rounded or the corners rounded oft' the holder I will be oscillated on the pivot K.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- The improved tool-holderi'or grindstones, consisting of the stand A, cross-bar B, bearings C, holder I, oscillating beam E, arm F, adjustingscrew and binding-screw L, the holder I being pivoted to the oscillating beam, and all combined and arranged and adapted for application to a grindstone, substantially as specified.

EDVARD F. EDGEGOMB. Witnesses:

DAVID DUNN, LoErNG EDeEcoMB. (70)