US371313A

US371313A - green

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Publication number: US371313A
Authority: US
Publication date: 1887-10-11
Anticipated expiration: 1904-10-11

Description

(No Model.) 3 Sheets-Sheet 2.

0. W. GREEN.

STONE SAW GANG AND SAND FEED COMBINED. No. 371,313. a Patented Oct. 11, 1887.

ITIIIIIIE ZjIEEl-lim II INVNTOH M, 12w M ATTORNEYS N PETERS. Fhuhrljlhogmphnr. Washinghm. ac.

(No Model.) 7 3 Sheets-Sheet 3.

0. W. GREEN. STONE SAW GANG AND SAND FEED COMBINED.

No. 371,318. Patented Oct. 11, 1887..

WITNESSES: gvlzmon ATTORNEYS N. PETERS PbmmLiIhngnpher, Washington, Dv c.

UNITED STATES PATENT OFFICE.

CYREL IVORINGTON GREEN, OF WEST RU'ILAND, VERMONT.

STONE-SAW GANG AND SAND-FEED COMBINED.

SPECIFICATION forming part of Letters Patent No. 371,313, dated October 11, 1887. Application filed April 11, 1887. Serial No. 234,348. (No model.)

To all whom it may concern:

Be it known that I, OYREL WORINGTON GREEN, of \Vest Rutland, in the county of Butland, in the State of Vermont, have invented new and useful Improvements in Stone-Saw Gang and SandFeed Combined, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention consists in a novel organization of a machine designed for sawing stone and to automatically feed the saws with water and sand during the operation of said saws, and which machine is simple and compact in construction, requiring less space than other machines of this class, and receives motion through the medium of a system of levers which materially facilitates the operation of the machine, all as hereinafter fully described, and specifically set forth in the claims.

In the accompanying drawings, Figure l is a perspective view of a stone-saw gang and sand-feed combined embodying my invention. Fig. 2 is a vertical transverse section of the same, taken through the center of the automatic sandfeed. Fig. 3 is a vertical longitudinal section taken on lines a: 00, 'Fig. 2. Fig. 4 is a top plan View of the mechanism which regulates the feed of the saws in their operation. Figs. 5 and 6 are detail views of the anti-friction bearings of the levers and eccentric, respectively; and Fig. 7 is a detached side view of the devices by which the pawls of the saw-gang feed are thrown in and out of gear.

Similar letters of reference indicate corresponding parts.

A represents the main supporting-frame of the machine, the corner-posts A A of which frame I provide with vertical guide-grooves o o, in which are fitted to slide vertically the fulcrum-bars B B, and to these fulcrum-bars are pivotally connected levers O G G O, to the lower ends of which is connected the sawframe D, to which latter the saws g g are secured in any suitable and well-known manner. The two levers at each end of the machine are inclined with their upper ends to ward each other, and a single bar, H, is connected at opposite ends between the upper ends of the respective setsof levers.

1 represents the eccentric, mounted on a driving-shaft, U, and from said eccentric is extended a rod, I, the extremity of which is pivotally connected to the connecting-bar H, hereinbefore referred to. Said eccentric, when in motion, imparts reciprocating motion to the bar H, and by that means oscillatory motion is transmitted to the levers O C (l C, and the motion of the latter imparts the requisite motion to the saw-frame l).

The lowering and raising of the sawframe I accomplish by the following feed mechanism: Across the top of the frame A, I place a shaft, a, journaled in suitable boxes on said frame, and to' the said shaft I rigidly secure a gear-wheel, b, and drums c c, and to the upper part of opposite ends of the frame A, I pivot sheaves (l .61. Over these sheaves run wire ropes w w, which are connected at one end to the aforesaid drums and at the opposite end to the fulcrumbars B B, the ropes at each side of the frame being wound on the drum in opposite directions, so that by rotating said drums the two ropes running therefrom are either paidout or wound up in unison, ac cording to the direction in which the drum is turned. The fulcrunrbars, being suspended by said ropes, are thus lowered and raised by the aforesaid movement of the ropes. On the top of the frame A is mounted a sliding bar, 3, to which are connected two jaws, n n,whicl1 project laterally therefrom, so as to be encountered by one of the levers 0 during the oscillation thereof, and thus the aforesaid sliding bar receives reciprocating motion during the oscillation of the aforesaid lever. To the sliding bar is pivotally connected a pawl, Z, which is adapted to engage the gear I), and thus rotates said wheel in a direction which causes the ropes w w to be wound up on the drums, and consequently raises the saw-frame D. Parallel with the shaft a is a counter-shaft, e, journaled in suitable bearings secured to the frame A. To this counter-shaft is secured a pinion, f, which meshes in the gear-wheel b, as shown in Fig. 4. of the drawings. To the counter-shaft is also rigidly secured aratchetwheel, h, with which is adapted to engage a pawl, Z, connected to the sliding bar I, hereinbefore referred to. By throwing the pawlZ out of engagement with the gear I) and the pawl Zinto engagement with the ratchet-wheel h when the machine is in operation the shaft and thus the fulcrum-bars B B are allowed to descend,together with the levers O O C 0, connected thereto, and saw-frame hung on said levers. The pawls Z Z may be shifted by means of suitable levers, Z and l, as shown in Fig. 7 of the drawings.

In order to maintain the aforesaid shafts dormant in their positions while the pawls are out of engagement, I employ a suitable brake, which I have represented in the annexed drawings in the form of a wire rope, j, attached at one end to a friction-band,j, surrounding the drum j on the counter-shaft c, and connected at the opposite end to a winch, T, by means of which the said wire rope can be wound up, so as to exert sufficient friction on the drum of the counter shaft to restrain the rotation thereof, as aforesaid. A dog, 1, pivoted on the frame A and engaging a ratchet, 2, on the winch, serves to maintain the wire rope j at the requisite tension.

Inasmuch as it is preferred to arrange the main driving-shaft U at an elevation above the connecting bar H and at the proper distance from the end thereof, it is obvious that during the descent of the saw frame with its levers O O O O and connectingbar H the angle between the eccentric-rod I and connecting-bar H is constantly changed, and said latter bar is gradually drawn toward the side at which the main driving-shaft is located, and consequently the motion of the connecting-bar with the levers O O (J 0 connected thereto is gradually reduced.

In order to reduce the motion of the feed- 7 wheels I) and It correspondingly, I attach to the lever O with which the jaws of the sliding bar I engage cheek-pieces n n, which are tapered from their lower ends upward.

The aforesaid feed I render adjustable by connecting the jaws n n adjustably in their positions on the bar 1', which may be effected by providing said bar with longitudinal slots 3 for the reception of the bolts by which the jaws are clamped on the bar, as best seen in Fig. 3 of the drawings.

Inasmuch as machines of' this class areexposed to more or less grit, it is necessary to guard against friction in the bearings of the machine as much as possible, and in order to meet this requirement I employ anti-friction bearings N N around the eccentric I and at all of the pivotal connections of the levers O O O C with the bar H, fulcrum-bars B B, and saw-frame D, and also in the connection of the pitrnen I with the bar H. These anti-friction bearings consist each of a hub, 19, secured to one of the aforesaid parts, and an annular plate, .9, secured to the adjacent part, and balls or rollers 15 t, interposed between said hub and plate, as illustrated in Figs. 5 and 6 of the drawings.

In connection with the described machine I employ an automatic sand-feed, consisting of a hollow rotary shaft, F, mounted horizontally in suitable bearings secured to the frame A, and having one end open and over the central portion of the saw-frame D. The opposite end of said shaft is closed and has secured to it a hub, F, and this hub is provided with radial channels is, communicating with the interior of the shaft F. In the said channels are firmly secured suitable dippers, G G, preferably of the form of pipes curved similar to the arms of the so-called Persian wheel. The free ends of said pipes terminate nearly concentric with the axis of the shaft F and pass through a trough or reservoir, L, in which are deposited sand and water. During the rotation of the shaft F the dippers or pipes G G collect sand and water from the reservoir L and conduct saidsand and water into the pipe F, which deposits the same on the top of the stone operated on by the saws.

The described sand-feed is operated synchronously with the operation of the saws by means of a driving-belt, at, running on the hub of the shaft F and on a pulley, m, secured to the driving-shaft U.

I do not limit myself specifically to the employment of the curved pipes G G, as it is obvious that dippers of various forms can be made to move with the shaft and conduct sand and water to the same; neither do I limit myself to the use of the eccentric I, inasmuch as a crank will answer the same purpose.

Having described my invention,what I claim as new, and desire to secure by Letters Patent, is-

1. In combination with the main frame and the reciprocating saw-frame and water and sand reservoir, a hollow rotary shaft arranged horizontally and having one end open and" over the saws, a hollow hub secured to the opposite end ofsaid shaft, and hollow curved arms projecting from the hub and communicating with the interior of the hollow shaft, and having their free ends open and arranged to pass through the aforesaid reservoir, substantially as described and shown.

2. In combination with the main frame A, provided with vertical guides, and the fulcrums B B, sliding on said guides, the levers G O, inclined with their upper ends toward each other, the single bar H, connected at opposite ends to the upper ends of the two sets of levers, the pitman I, connected to the bar H, and the saw-frame D, hung on the lower ends of said levers, substantially as described and shown.

3. The combination of the main frame A, provided with vertical guides A A, the fulcrums B B, sliding on said guides, the levers O 0, connected to said fulcrums,the saw-frame D,hung on saidlevers, the shaft a, pivoted on the main frame, the gear-wheel b and drums c c,secured to said shaft,sheaves d d d d, pivoted t0 the main frame, ropes passing over the sheaves and connected at opposite ends to the drums and fulcrums, the counter-shaft e, the pinion f and ratchet-wl1eel h,both attached to said counter-shaft, the sliding bar 95, actuated by the aforesaid levers,and the pawls Z Z,

connected to said sliding bar and adapted U ing bar i, jaws n n, adjustably connected to the said bar, and pawlsll, connected to the sliding bar, substantially as described and shown.

5. In combination with the feed-gears Z) and h, sliding bar 2', provided with jaws n n and pawlsl Z, vertically-movable fulcruins B B, and the levers O O G 0, connected to said fulcrnms, the cheek-pieces 0 0, secured to one of the levers between the jaws n n and tapered from their lower to the upper ends, substantially as described and shown, for the purpose set forth.

In testimony whereof I have hereunto signed my name and affixed my seal, in the presence of two attesting witnesses, at \Vest Rutland, 0 in the county of Rutland, in the State of Vermont, this 5th day of April, 1887.

CYREL WORINGTON GREEN. [n s] W'itnesses:

A. A. KIDDEs, D. M. SOHELL.