US752504A - Stone-sawing -machine - Google Patents

Description

No. 752,504. PATENTED FEB. 16, 1904.

0. ALSTON. STONE SAWING MACHINE.

APPLIOATION FILED MAR 11, 1902.

N0 MODEL.

- UN ED- STATES- v Patented February 16, 1904.

PATENT Oriucal s'ToNE-sAwme MACHINE,

SPEGIFICATIQN forming part of Ihetters Patent N0. 752,504, dated February 16, 1,904.

Application an March 11, 1902.

To all whom it may concern:

Be it known that I, OSCAR Vi. ALs'roN, a citizen of the United States, residing at Lanesboro, in the county of Susquehanna and State of Pennsylvania, have invented certain new and useful Improvements in Stone Sawing Machines; and I do declare the following to be a full, clear, and exact description of' the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to stone-sawing machines; and the object of the same is to construct a device of this character which will enable the entire length of the oscillation or stroke of the saws to be utilized or the same minus a very small portion thereof in which a lift or upward movement is given them to permit the grit to get under the saw.

My invention consists of a novel construction fully described in this specification and more specifically pointed out in the claims, and illustrated in the accompanying drawings, in which I Figure 1 is a detail side view of two of the pendulums, the saddle, and connecting-bar. Fig. 2 is a vertical longitudinal section of a sawing-machine equipped with my device. Fig. 3 is an end elevation of the same looking toward the end of the cams. Fig. 4 is a detail of one pair of pendulums illustrating their difierent positions. Fig. 5 is a detail of one of the pendulums.v

Like characters of reference designate like parts in the difierent views of the drawings.

The letter K designates an upright, of which there are two, firmly. footed on a suitable base (not shown) and set parallel with each other. Carrier-blocks F are slidably mounted on guides K, formed on the uprights K. Feedscrews S are mounted in longitudinal grooves in the upright K and engage apertures in the carriers F to enable them to be adjusted vertically as the sawing progresses. Bookable saddles O are mounted on studs E, formed on the carriers F, and have arms C thereomwhich Serial Not "97,759." (No model.)

carry studs L and M, on which are pivoted the upper ends of two pairs of pendulums A and B. The lower ends of the pendulums A and B are pivoted to the opposite ends of bars D, which bars are rigidly connected to a sash H by pins N and G passing through apertures in collars Iand ears G, respectively. Since the bars D are rigidly connected to the sash H, it is obvious that the pendulums A and B could be directly connected to the sash H and would produce the sameeffect if the bracket H extended out as far as the end of the bars D; but because the frame H does not extend out this far I employ the bar D as a means of lengthening or extending the bracket H sufficiently to spread the pendulums A and B the requisite amount to make their upper ends converge.

The bracket H supports saws (not shown) and is mounted to be reciprocated by some means (also omitted) to oscillate the pendulums. The kinematical illustration in Fig. 4 shows that the path of the saws will be very flat, so that a relatively long stroke may be obtained with a small rise. -It will also be noted that the point of intersection of the lines of direction of the pendulums'that is, the lines drawn through their pivots-would always line in these lines produced and above the saddles.

I do not Wish to be limited as to details of construction, as these may be modified in many particulars without departing from the spirit of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, i s

1. Ina stone-sawing machine, the combination of a bracket-carrying saws, of a rockablymounted saddle, a pair of converging pendulums pivoted at their lower ends to said bracket and at their upper ends to the arms of said saddle, the point of intersection of the lines of direction of said pendulums lying in said lines produced, substantially as described.

2. In a stone-sawing machine, the combination of a bracket carrying saws, of a rockablymounted saddle, a pair ofconverging pendulums located in a common plane, and pivoted to the arms of said saddle and to said bracket,

the point of intersection of the lines of direction of said pendulums lying in said lines produced, substantially as described.

3. In a stone-sawing machine, a frame carryingsaws, rockably-mounted saddles having oppositely-extending arms, pairs of converg ing non-crossing pendulums pivoted to said saddles and to said frame, and means for reciprocating said frame, substantially as described.

4. In a stone-sawing machine, a bracketframe for carrying saws, two rockably-mounted saddles, two pairs of converging pendulums pivoted to said bracket and to said saddles, the

members of each of said pairs lying in the same plane, substantially as described.

5. In a stone-sawing machine, a bracketframe, a rockably-mounted saddle, a bar rigidly connected to said bracket and forming an extension thereto, a pair of pendulums pivoted to said bar and to said saddle, substantially as described. L

In testimony whereof I aflix my signature in presence of two witnesses.

' OSCAR W. ALSTON.

Witnesses:

W. E. BENNETT, HENRY A. BENNETT.

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