US617440A - Arthur jones - Google Patents

Description

No. s|7,44n. Patented 1an. |u, |899. A. JoNEs.

SCRLL-SAW.

(Application filed Mar. 7, 1898.)

(No Modal.)l

UNITED STATES PATENT OFFICE.

ARTHUR JONES, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO JOHN P. DOMMERSNAS, OF SAME PLACE.

SCROLL-SAW.

SPECIFICATION forming part of Letters Patent N0. 617,440, dated January 10, 1899.

Application filed March 7, 1898.

This invention relates to improvements in that class of scroll-saws designed to be operated by hand and to be used for cutting out intricate patterns in pieces of Various kinds of material for ornaments, coping, and the like and for doing other curved or irregular Work; and it consists in certain peculiarities of the construction, novel arrangement, and operation of the various parts thereof, as will be hereinafter more fully set forth land specically claimed.

The principal object of my invention is to afford a hand-operated scroll-saw of the abovenamed character in which the saw-blade may be readily turned in its bearings to any desired angle, thus enablingthe cut or incision to be made in any direction from the operator. Another object of my present invention is to provide a simple and efficient means of tightening the cable or cord through the medium of which the stub-shafts to which the saw-blade is secured may be turned, and also to provide a construction of the saw-framethrough which the cable or cord may be readily inserted and will have suitable curved resting portions near the corner of the frame.

In order to enable others skilled in the art to which my invention pertains to make and use the same, I will now proceed to describe it, referring to the accompanying drawings, in Whicll- Figure l is a View in elevation, partly in section, of my invention, showing the saw and its frame shortened for the convenience of illustration. Fig. 2 is a sectional view, taken on line 2 2 of Fig. l, showing the frame and the endless cord or cable for operating or changing the position of the saw. Fig. 3 is line 3 3 of Fig. 1, looking in the direction of Serial No. 672,862. (No model.)

the arrows, showing a portion of the handle and a part of the saw-blade. Fig. 4 is a perspective view of the endless cable or cord detached. Fig. 5 is a similar view, detached, of a key used for securing parts of the frame together; and Fig. 6 is a view in elevation of a portion of the frame, showing one of the slots therein to be used for facilitating the passage of the cable through the frame.

Similar letters refer to like parts throughout the different views of the drawings.

A represents the frame, which may be made of any suitable size, form, and material, but preferably tubular, as shown in the present instance, and bent to form three sides of a substantially rectangular figure. The ends of the frame are secured in suitable socketpieces B and B', each of which is provided in its upper portion with a slot b to receive a key C, secured in position between the lugs lb on the socket-pieces by means of a screw c, used for tightening or clamping the socketpieces on the ends of the frame. The keys are provided at their inner portions with projections c to enter slots a in the ends of the frame A to prevent the socket-pieces turning y blade F and enlargements f on the ends thereof. The cable or cord G, as shown in Figs. l, 2, and 4 of the drawings, is passed once and a half around each of the sheaves or pulleys D and D and then passes up and through the frame A and has its strands crossed, as shown in Fig. 4 of the drawings, l

on the upper portion of the frame. For the convenience of passing this cable through the frame A said frame is provided in its curved portions or corners with slots d on its outer surface, as shown, the inner surfaces of the curved portions of the frame aifording bearings for the cord or cable Gr, as is apparent. Secured to one of the stub-shafts, and

IOO

usually that one E', located in the socketpiece B', is a handle H, which is used for forcing the saw back and forth through the material to be sawed and is also employed for turning the blade to the desired position. The inner portions a2 of the curved parts of the frame form bearing-surfaces for the cable G, and the openings a in the outer surface of the said curved parts may be used for the insertion of an instrument employed for pushing the cable or cord through the tube.

The operation of my saw is simple and as follows: The enlargements f on the ends of the blade F maybe inserted into the enlarged openings e near the ends of the stub-shafts, in which position the said blade Will be held by reason of the slight tendency of the ends of the frame to spring apart. After the blade shall have been thus fixed in the stub-shafts it may be turned to any desired position by turning the handle, which Will cause the pulleys to rotate by reason of the cable or cord which connects them. In the event of the cable or cord becoming slack through stretching or otherwise the ends of the frame eX- tendng into the socket-pieces may be moved outwardly until the cable is made taut and held in such a position by clamping the socketpieces thereon.

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

The combination with the frame, having a `slot in each of its ends, of a slotted socket- ARTHUR JON ES.

Vitnesses:

CHAs. C. TILLMAN, E. A. DUGGAN.

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