US770403A - Machine for sawing stone - Google Patents

Description

PATENTED SEPT. 20, 1904.

O. A. THOMSON. MAOHINE FOR SAWING STONE.

APPLICATION FILED APR. 8. 1903.

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PATENTED SEPT. 20, 1904.

. G. A. THOMSON. MACHINE FOR SAWING STONE.

APPLICATION FILED APR. 8. 1903.

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CHARLES ALLEN THOMSON, OF BELLEVILLE, NEW JERSEY,

MACHINE FOR SAWING STONE.

SPECIFICATION forming part of Letters Patent N0. 770,403, dated September 20, 1904. Application filed April 8, 1903. Serial No. 151.657. (No model.)

To all w/wm it may concern:

Be it known that 1, CHARLES ALLEN THOM- SON, a citizen of Scotland, residing at Belleville, in the county of Essex and State of New J ersey, have invented certain new and useful Improvements in Machines for Sawing Stone, of which the following is a specification.

My invention relates to machines for sawing stone, and has for its object the provision'of improved means for controlling the movements of the saw-frame.

A further object of the invention is the provision of connected sets of levers for suspending the saw-frame, one set of levers being articulated to the front and the other to the rear of said saw-frame,and, in connection with said levers, means for so controllingtheir movement that the frame will be caused to reciprocate in the path desired.

Other objects of the invention will be set forth in the detailed description which now follows.

In the accompanying drawings, Figure 1 is an end view of a stone-sawing machine with my invention applied thereto. Fig. 2 is a side elevation of part of one side of said machine, a portion of the saw-frame being in section; and Figs. 3 and 4 are views of modifications.

Like numerals designate similar parts throughout the several views.

Referring to the drawings, the numeral 5 designates the frame of the machine, which may be of any approved construction, said frame having vertical standards or uprights 6, between which a saw-frame 7 is suspended. This saw-frame is of well-known construction and carries a series of saws 8 for operating upon the material, which is to be supported upon a bed (not shown) of common form.

Pivoted to the saw-frame 7 at 9 are sets of levers 9, each set being composed of two levers connected and braced by cross rods or bars 10 and 12, as illustrated in all the figures of the drawings. One set of these levers is pivoted at or near the front of the saw-frame, and the other like set (not shown) of the same construction is to be pivoted at or near the rear end of said frame, and in this way the saw-frame is suspended between the uprights '6 6 of the frame 5. If suspended in the ordinary manner from fixed pivots, this saw-frame would move in an arcuate path throughout its strokes and the saws would produce kerfs of irregular depth in the work and would, moreover, strike the same at certain points with more or less force, depending upon the radius of the arc of movement, and to prevent this action and cause said frame to move in a sub stantially horizontal line the following devices are provided.

Designated by 13 13 are slides fitted upon guideways 6 6 of the uprights 6 6, and these slides are adjusted to feed the saws to the work and to withdraw them therefrom by means of screws 14 1 1 working in nuts (not shown) in the slides and provided with bevelgears 15 15 in mesh with similar gears 16 16, carried by shafts 17 17, journaled in bearings of the framework and driven in any desired manner to cause the necessary slow feed of the saw-frame or a quick return of the same. Other means for feeding and withdrawing the saw-frame may be substituted for the screws shown without departure from the invention.

As shown in Figs. 3 and 4, a pitman 18 is pivoted to the end of the saw-frame, and this pitman may be actuated by any desired means to cause it to reciprocate said frame.

As shown in Fig. 1, the ends of the rods 10 are extended at 10 and are titted in slightlycurved guideways 19 19, located, preferably, on the inner sides of the lower ends of the slides 13 13, said guideways facing each other, and the rods 12 are also extended beyond said levers 9 9 and are fitted in vertical guideways 2O 20, formed in the inner facing sides of the tops of said slides. The ends of the rods 10 may be inserted in slightly-curved shoes 21 21, shaped to fit the guideways, while those of the rods 12 may be fitted in shoes 22 22, shown in dotted lines in Fig. 1 as mounted in the vertical guideway 20 20 of the slides. When, for instance, the frame7 swings toward the right in Fig. 2, the guide-blocks 21 21 follow the slightly-curved guideways 19 19 in the slides, and material raising of the frame is prevented by the substantially horizontal movement of the blocks 21 21 in said guideways 19 19. In other words, if the saw-frame were supported for swinging movement by levers mounted upon fixed pivots said frame- Would of course swing in an are determined by the lengths of the lever-arms 9 and the positions of said pivots. To compensate for this tendency of the frame to swing in an arcuate path and to always insure its motion in a substantially horizontal line, the two guideways mentioned are provided, and it will be seen that as theblocks 21 21 of the lever-arms 9 arrive at the crown of the slight are shown the rods 10 and 12 are in a vertical line, and the blocks 22 22 will by their rising movement in the vertical guideways 2O 20' thus compensate for this arcuate tendency of the levers and will cause the saw-frame to move in a substantially horizontal pathway. In the construction shown in Figs. 1 and 2 this move ment of the frame is substantially horizontal in both strokes thereof, and consequently the saws will produce cuts of practically uniform depth and on substantially horizontal lines in the work.

In Fig. 3 one of the slides 13 is shown provided with a guideway 23 of more pronounced curvature, and the vertical guideway 20 is illustrated extended to enable the blocks on the ends of the rods 12 to move vertically a sufficient distance'to compensate for the arc of movement of the rods 10 in said guideway 23, which construction will cause the saw-frame? to reciprocate in a curved line, rising at the center of its stroke to enable shot, crushed steel, or other attrition material'to be readily fed beneath the blades.

As shown by dotted lines a, when the rods 10 and 12 are brought into vertical alinement said rods 12 have moved from their normal position to the position shown at b in dotted lines in said figure, and when brought to the position shown by dotted lines they have descended the arc-shaped guideways 23, and the blocks in which rods 12 are mounted have again assumed their normal positions, the frame 7, however, being caused to move in a curved line determined by the curvature of the arc-shaped grooves in slides 13.

In the construction shown in Fig. 4 an arcshaped guideway 24 of different radius from that shown in Fig. 3 is employed, and, as will be seen by said figure, the arc traversed by the pivots 9 is designated by the dotted line 25, and in the position 6, at the crown of the arc of the guideway 24, said frame will be raised, as shown by dotted lines 26, whereas when the levers 9 are in the position shown by the dotted lines f said frame will be lowered to the full-line position represented in said figure. In the construction shown by this figure the arc 24 is somewhat shorter than the are 23 of Fig. 3; but the mode of operation of both constructions is the same. In this way'the saw-frame and saws carried thereby will be alternately lowered and raised and will move in a curved line, this raising movement enabling the grinding or attrition material to be readily fed bene'ath the blades.

Grooves of different form from those shown in Figs. 1 and 2 may be formed in the inner 'faces of the slides, if desired, and various changes may be made to enable the saw-frame to be moved in any path required, the invention not being limited to the precise details of construction described. So, too, any means may be employed for reciprocating the sawframe, and guideways of different curvatures and proportions may be substituted for those shown, if desired.

Having thus described my invention, what I claim is 1. The combination, with standards, of slides adjustable thereon, each slide having a vertical guideway, and below said vertical guideway a second guideway; levers carrying devices movable in said vertical and second guideways; and a saw-frame connected to said levers.

2. The combination, with standards, of slides adjustable thereon, and having on their inner faces curved and vertical guideways; levers carrying devices movable in said curved and vertical guideways; means for uniting said levers; and a saw-frame carried by the levers.

3. The combination, with standards, of slides adjustable thereon and each having on its inner face a vertical guideway, and below said vertical guideway a curved guideway; levers; rods uniting said levers, and having extensions fitted in said guideways; a sawframe carried by the levers; and means for reciprocating said saw-frame.

4;. The combination, with standards, of slides movable thereon; means for adjusting said slides; a vertical guideway on the inner side of each slide; a curved guideway below the vertical guideway, and also located on the inner side of each slide; means for connecting the levers; means carried by the levers and fitted in said vertical and curved guideways; and a saw-frame articulated to the levers.

5. In a stone-sawing machine, the combination, with vertical standards, of slides mounted on said standards; mechanism for adjusting said slides; a vertical guideway on theinner face of each slide; a curved guideway located below the vertical guideway, and also on the inner face of each slide; a pair of rods for connecting the levers, said rods having ex: tensions fitted in the vertical and grooved guideways of the slides; a saw-frame articulated to said levers; and means for reciprocating said saw-frame.

6. In a machine of the class described, the combination, with framework having vertical standards, each standard having a guideway,

of slides fitted to, and adjustable upon, said guideways, each slide having a curved guidesaid shoes being fitted in the curved and Vergroove and, above said curved guide-groove, tical guide-grooves. 10 a vertical guide 'groove on its inner side; In testimonywhereofIaflixrnysignature in screws for adjusting said slides; a saw-frame presence of two Witnesses.

5 mounted between the standards; lever-arms CHARLES ALLEN THOMSON.

pivoted to the saw-frame; rods connecting Witnesses: said lever-arms and having projecting ends; WM. H. TUR'K,

and shoes for receiving the ends of the'rods; R. A. VAN KIRK.

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