US30557A - Machine for dressing stone - Google Patents

Description

UNITED sTATEs PATENT oEErcE.

MINER H. BACON, OF MYSTIC, CONNECTICUT.

MACHINE FOR DRESSING STONE.

Specification of Letters Patent No. 30,557, dated November 6, 1860.

To all whom it may concern:

Be it known that I, MINER H. BACON, of Mystic, in the county of New London and State of Connecticut, have invented a new and useful Improvement in Machines for Dressing Stones; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, in which- Figures i and 2 are side elevations of the novel portions, Fig. 3 is a front view of a portion, Fig. 4L is a view of the cutters and cutter bar on a larger scale.

Similar letters of reference indicate like parts in all the figures.

My invention relates to machines in which cutters are lifted by the action of a revolving wiper turned by power and are allowed to act by falling on the stone.

The nature of my invent-ion consists, first, in a certain arrangement of mechanism for increasing the force of the blows given by the cutters, beyond that due to the action of gravity alone; second, in an arrangement of means of diminishing the force of such blows; third, in a certain arrangement of parts for suspending the action of the cutters at pleasure; fourth, in a certain method of adjusting several cutters in the cutter frame so that all may cut to an equal depth, in combination with means for independ ently adjusting the inclination of cach cutter.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation by the aid of the drawings.

Upon the frame A, A, which supports the revolving shaft. and wiper, are permanent ways, B, B, upon which the sliding frame C, C, is free to traverse. On this frame, C, is mounted in boxes a vertical spindle D upon which is fixed a cutter bar E carrying the cutter holder F. Upon the same frame, C, is also mounted a vibrating frame Gr, having at one end the segmental gearing I-I.

l This frame, Gr, carries also the springs J, K,

and vibrates around the pivot L, which connects it to C. The lever M is connected to frame Gr at the point m, in such a manner that when the frame is depressed (by turning the hand wheel N which rotates the pinion, O, engaging in the segmental rack IAL) said lever M will be caused (by the action of the cutter bar, E, upon its arms, as may be seen in the drawings,) to press upon the spring K, and thus increase the force of the blow, when the wiper, I), (rotated by the wheel, Q, which receives its motion from any convenient source of Vpower,) lets go the cutter bar, allowing it to drop by its own weight, aided by the pressure of the spring. If now, the oscillating frame G be elevated in a similar manner the other spring will be brought in action by the same means, and the force of the blow will be checked. But if it be further elevated until the stop R catches in a corresponding recess, the cutters will remain suspended above the surface of the stone.

Two or more cutters, S, are attached to the holder by means of the sleeves T and the screws, U, thus enabling them to be adjusted so as to cut the same depth, though they may wear unequally. Only one of these cutters S, sleeves, T, and screws U, is shown. The other or others are precisely like the one represented, and are supposed to stand directly behind the one represented. Great nicety is requisite in this adjustment, as the lines used in dressing mill stones, for which my machine is peculiarly adapted, are often less than one one-hundredth of an inch in depth.

It will readily be seen that by properly setting the screws IV, X, Y, the edge of the cutters when slightly inclined to the axes thereof, (as they invariably will be through bad workmanship,) can be adjusted to a line parallel with the surface of the stone.

Having now fully described my invention,

what I claim as new therein and desire to secure by Letters Patent isl. The arrangement of the vibrating frame, G, with the lever, M, and the spring K for increasing the force of the blows, at pleasure, beyond that due to gravity alone.

2. The employment of the checking spring, QI, in combination with the vibrating frame Gr and lever M or their equivalents, sub stantially as herein described, for diminishing the force of the blows at pleasure, below that due to gravity.

3. The arrangement of the recess, 71, in the vibrating frame, Gr, the stop, R, on the sliding frame, C, and of the gearing, H and O, substantially as and for the purpose herein set forth.

'2 Y Y Y 30,557

4. The employment of the sleeves, T, op-

erated by the screws, U, or their equivalents,

In Witness whereof I have hereunto set my name 1n presence of tvvo subscribing Witmesses.

f MINER H. BACON. Witnesses:

I. S. SCHOONOVER, J. WATROUS, Jr.

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