US119813A - Improvement in machines for curving saw-blades - Google Patents

Description

. IBLSSUSHW achne 'fw Carving 4S -aws No. 119,813. Patente-d oct. 1o, 1871,

UNITED STATES PATENT CEEIGE.

BELA S. BISHOP, OF MENASHA, WISCONSIN.

, IMPROVEMENT IN MACHINES FOR CURVING SAW-BLADES.

Specification forming part of Letters Patent No. 119,813, dated October 10,1871.

To all whom it may concern:

Be it known that I, BELA S. BISHOP, of Menasha, in the county of Winnebago and State of Wisconsin, have invented a new and useful Improvement in Machines for Curving Saw-Blades, and I do hereby declare that the following is a true and accurate description thereof, reference being had to the accompanying drawing and to the letters of reference marked thereon, and being a part of this specication, in which- Figure 1 is an end elevation, and Fig. 2 is a sectional side elevation of my machine. Fig. 3 is a cross-section of the wheel rims, showing the process of curving a saw-blade.`

Like letters refer to like parts in each figure.

rlhe nature of this invention relates to the construction of a machine by means of which saw-blades may be transversely curved; and it consists in the novel and peculiar arrangement in a suitable frame of a convexed rim-wheel and a peen-wheel journaled in a slide above it, so that in the combination of its principal-operative parts, it is constructed and arranged as more fully hereinafter described.

In the drawing, A represents a metallic frame.

lB are standards, one at each side of the frame,

connected at the top by a girt, B. O is a crosshead, having a vertical movement in slots or guides in the standards B, and on which a downward pressure is exerted by the set-screws D, threaded in and through the girt. E is a shaft, transversely journaled in the lower part of the frame directly below the cross-heads, and is rotated by a crank or by power, if preferred. F is a wheel, having a heavy rim slightly convex on its periphery. G is a peen-wheel, journaled in the cross-head directly over the wheel F 5 the periphery of this wheel is sharp, as shown in Fig.

3, and it should be made of steel or case-hardened iron. H is atable, longitudinally arranged in the frame, passing along in a plane with the upper edge of the main wheel at one side thereof, while its legs or standards are pivoted at their lower end to transverse bars I at the ends of the main frame, on the vertical plane of the main wheel.

The operation of curving a saw is as follows: The cross-head is moved downward until the peen-wheel is a little less than the thickness of the saw-blade distant from the main wheel, when the saw-blade is placed on the table and its end pushed forward between the two wheels, if the main wheel be now rotated the saw will be drawn in between the two, and as it passes along on the table against a stationary guide thereon the peen-wheel cuts into it and the repetition of this action, but on different lines, curves the saw, shown in Fig. 3, where S represents a saw-blade as though peened with a hammer, without being (lished in all directions, only transversely to the length of the blade and direction of the cuts.

I do not wish to confine myself to the exact arrangement of the peen-wheel in the cross-head moving between the standards, as it may be otherwise arranged to produce the desired result.

VVhat'I claim as my invention, and desire to secure by Letters Patent, is-

The combination of the frame A, standards B, girt B', cross-head G, set-screw D, shaft E, wheel F, peen-wheel G, and table H, all constructed and arranged substantially as and for the purpose set forth.

BELA S. BISHOP.

Witnesses:

JOHN POTTER, Jr.,

GEO. M. BEACH. (131)

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