US310563A

US310563A - Scroll-sawing machine

Info

Publication number: US310563A
Authority: US
Publication date: 1885-01-13
Anticipated expiration: 1902-01-13

Description

(No Model.)

A. S. DAVIS.

SCROLL SAWING MACHINE.

No. 310,563; Patented Jan. 13, 1885.

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ADELBEH'I DAVIS, OF SENECA. FALLS, NE\V YORK.

SCROLL-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 310,563, dated January 13, 1885.

A pplicaiion filed October "20, lrX-"l.

To (0 whom it may concern.-

Be it known that I, ADELBERT luvls, of Seneca Falls, in the count-y of Seneca, in the State of New York, have invented new and useful Improvements in Scroll -Sawing Machines, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention consists in an improved construction of the main support 01' the vibratory saw-frame, which support admits of ad justing the saw-frame arms in their position, so as to sustain them in a perpendicular line one over the other, and also admits of adj usting the pivotal bearings of the saw-frame 011 its said support to compensate for the wear of said bearings and take up the lost motion incident to said wear.

In the annexed drawings, Figure l is a side elevation of a scroll-sawing machine provided with my improvement. Fig. 2 is a horizontal section 011 line cc min Fig. 1, on an enlarged scale. Fig. 3 is an enlarged side elevation of that portion of the machine to which my im provement is applied. Fig. 4 is a vertical transverse section on line y y, Fig. 1, also on an enlarged scale; and Figs 5 and 6 illustrate modifications of my invention.

Similar letters of reference indicate corresponding parts.

A represents the standard or main support-- ing-frame of the machine, the peculiar construction of which frame constitutes the subj ectmatter of another application for Letters Patent which I intend to make.

B is the driving-wheel j ournaled on the rear portion of the frame and rotated by the treadles T T, pivoted on the bottom portion of the frame, and pitmen O C, connected with the treadles and with wrist-pins on the driving-wheel.

D denotes a counter-pulley journaled on the front portion of the frame A, and having connected with it the balance-wheel E. The upper portion of the frame A terminates with forwardly and rearwardly extended arms, on the first of which is mounted the table G in any suitable and well-known manner.

On the rearwardlyextended arm of the frame A is rigidly secured the main support of the saw-frame F F, which usually consists of two tough and slightly elastic wooden arms, arranged in a perpendicular line one over the (No model.)

other, and reaching, res 'iectively, overand uuder the table G, where they carry the jig-saw H, which passes through a slot in the table and is connected at opposite ends to the re spective saw-frame arms F F by the ordinary and well-kn own means, not requiring a'detailed description in this case. The lower arm F being connected with a crank-pin on the pulley D by a pitman, I, and said pulley being rotated by the driving-belt a around the drivingwheel B and pulley D, imparts the vibratory motion to the saw-frame and the reciprocating motion to the saw. The main support of the saw-frame is in the form of apost, p, which is here shown rigidly attached to the frame A; but I do not limit myself to such arrangement, inasmuch as the tableG may be provided with a rearward extension of sufficient length to have the post 1) attached thereto. The ends of said post I form with bifurcations or lateral extensions terminating with ears 0 0.

To each of the saw-frame arms I attach a plate, in, provided with a horizontal bar, Z), which is either adapted to be embraced between the ears 0 0 of the post, as shown in Fig. el of the drawings, or made to reach over said ears and terminate with ears 00, embrac ing between them the ears 0 0 of the post, as represented in Fig. 5 of the drawings. In either case the plate on is pivoted on the post by set-screwsn n, passing through corresponding screw-threaded eyes in the outer ears, and having pointed ends entering recesses or sockets in the ends of the portion embraced between the aforesaid outer ears. Said set-screws constitute pivots, which admit of a ready attachment and detachment of the saw-frame when desired, and are adjustable endwise, and thus admit of adjusting the saw-frame arms F F, so as to carry them in a perpendicular line one over the other, and also admit of taking up the wear of the pivotal bearings. If

desired to use only one of the set-screws a as aforesaid, one end of the bar I) of the plate on can be made conical and seated in a suitable socket or recess in the adjacent ear 0 of the post, as illustrated in Fig. (i of the drawings.

In order to render the saw-frame arms F F adjustable, to maintain them parallel with each other, I provide the plates in on with transverse slots 1 1., through which to insert screws 2 2, by which the said plates are attached to the ICO arms F F. By loosening said screws the arms can be turned on the plates at m, so as to set the two arms F F parallel with each other, and by properly tightening the screws the said arms are retained in their parallel position.

Z represents the usual straining-rod extending through the two saw-frame arms F F back of the post p, and provided at one or both ends with a nut or nuts, 0, by which to exert the requisite pressure on the rear ends of the arms F F, to cause the forward ends thereof to hold the saw H at the desired tension.

Inasmuch as the arms F F are maintained in parallelism during their vibratory movement, the rod Z receives an oscillatory movement, and in order to obviate binding or friction of the connection of the rod Zwith the arms F F, I interposc between the nut c and arm F two washers, r and d, fitted to each other with V-shaped or so-called scale-bearings, as shown in Fig. l of the drawings.

Having now fully described my invention, what I claim as new, and desire to secure by Letters'Patent of the United States, is-

1. In combination with the main frame A and saw-frame F F, thepost P, rigidly attached to the frame A, plates attached to the sawframe, and connected with the post by bifurcations on either the plates or post, said bifurcations embracing the other of said parts, and pivots passing through the bifurcations and engaging opposite sides of the embraced part and arranged adj ustably endwise to take up the wear of thepivots and adjust the frame F in its position, substantially as specified and shown.

2. The combination, with the saw-frame and its supporting-post p, the plates m m, pivoted on the post and provided with slots 1 1, and attaching-screws 2 2, passing through said slots, substantially as described and shown.

In testimony whereof I have hereunto signed my name and affixed my seal, in the presence of two attesting witnesses, at Syracuse, in the countyof Onondaga, in the State of New York, this 3d day of October, 1884.

ADELBER'I s. DAVIS,