US81611A - Improvement in grindstone-frames - Google Patents

Description

ITFID STATE S, .PATENT Enron.

JOSEPH W. DOUGLAS, OF MIDDLETOWN,CONNECTIOUT, ASSIGNOB TO W.

DOUGLAS ANDBLDOUGLAS, OF SAMEPLACE.

IMPROVEM ENT IN GRlNDSTONE-FRAMES.

Specification forming part of Letters Patent No. 81,61 1, dated September 1, 1868.

To all whom it may concern Be it known that I, JosnPH W. DOUGLAs, of Middletown, in the county of Middlesex and State of Connecticut, have invented a new and Improved Grindstone-Frame; and I do hereby declare that the following is a full and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, and tb the letters of reference marked thereon.

This invention relates to a new and improved cast-iron frame for grindstones; and it consists in a novel manner 0f constructing the same, as hereinafter fully shown and described, whereby several advantages are obtained over the frames hitherto constructed for such purpose.

In the accompanying sheet of drawings, Figure l is a side view of my invention; Fig. 2, an end view ofthe same; Fig. 3, a plan or top view of the same 5 Fig. 4, a detached side view of the grindstone; Fig. 5, a vertical section of the same, taken in the line x m, Fig. 4.

Similar letters of reference indicate like parts.

Arepresents the water-chamber ofthe frame, which has a curved bottom, forming a portion of a circle concentric with the grindstone B. This water-chamber has a longitudinal iiange, C, extending all aroundit. The watenchamber, at each side, has dovetail anges a a, two near each end, to receive the upper ends of the legs D, the latter being provided, at their upper ends, with taper lips b, to t between the iianges. (See Fig. l.)

By this means the legs may be readily attached to and detached from the water-chamber, and the detachment of the legs admits of the .device being compactly boxed for shipment.

The shaft E of the grindstone rests upon friction-rollers c, arranged in the usual way, the boxes or frames F, in which said friction rollers are tted, being secured to the ange C, which is supported or sustained at these points by brackets Gr Gr, -shown in Figs. l and 2.

The water-chamber, flange, and brackets are all cast in ,one piece.

0n the upper surface of the flange C, at each end of the water-chamber A, there are cast parallel ways or guides d, on two of which, at one end of the frame, there is iitted a support or standard, H, slightly inclined from a vertical position toward the grindstone, as shown in Fig. l. This support or standard may be adjusted nearer to or farther from the grindstone, 011 its ways or guides d d, and secured at any desired ypoint by a set-screw, I. To this support or standard H there is attached a tool-rest, J, which is capable of being adj usted higher or lower, and may be secured at any desired point by a set-screw, K. By this simple arrangement, it will be seen that the tool-rest may be adj usted nearer or farther from the stone, and secured higher up or lower down, above 0r below the center of the same, as circumstances may require.

On the other ways or guides d d, at the opposite end of the water-chamber, there is tted an adjustable iiange or guard, L, secured in position by a set-screw, M. This flange or guard simply covers the edge of the stone 0pposite to the part where the tool is applied on rest J.

One of the legs D is cast with an eye, e, in Y which a treadle' or foot-lever, N, is secured by a fulcrum-pin, j', said treadle or foot-lever being connected, by a pitman, O, with a crank, P, on the shaft E of the grindstone. The shaft E has a screw-thread, g, cut onlit where it passes through the eye of the stone B,.and this screw has a slot or groove, h, made longitudinally in it, extending its whole length, to receive lips or projections t' of washers Q Q, which are tted loosely on the screw, and are pressed against the sides of the stone by nuts B B. (See Fig. 5.)

The stone B b, it will be seen, is clamped iirmly on its shaft E by screwing yup the nuts B B. By this means the stone is prevented from slipping on its shaft E, as the washers Q Q, in consequence of their lips or projections i fitting in the groove h, are prevented from turning on vthe shaft, and the washers are clamped rmly against the side of the stone, which, on account of its peculiarv granular structure, will not slip between the washers.

Having thus described my invention, I claim .as new and desire to secure by Letters Patent- l. The adjustable support or st rdard H, with tool-rest J applied to it, subsil .r tially as and for the purpose specified.

2. The providing the shaft; E with a. screwthread, g, having a slot or groove, h, made longitudinally in it, in connection with the 'washers o Q, furnished with nps or projections i, to t in the slot or groove I1., and the nuts R R on Jche screw-thread g, :1.11 arranged substantially as and for the purpose set forth.

JOS. W. DOUGLAS.

Witnesses:

JNO. M. DOUGLAS, GEO. M. SMITH.

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