US324842A

US324842A - Scroll-sawing machine

Info

Publication number: US324842A
Authority: US
Publication date: 1885-08-25
Anticipated expiration: 1902-08-25

Description

(No Model.) 2 Sheets-Sheet 1.

H. L. HOPKINS.

SCROLL SAWING MACHINE. No. 324,842. Pater lt ed Aug. 25, 1885.

Fly 1 c C i 1 ZZI'ZESSES: i e INVENTOR: .4 0 I i O z/qw g ffiw/ (Mm/6M (No Model.) 2 Sheets-Sheet 2. H. L. HOPKINS.

SCROLL SAWING MACHINE.

Patented Aug; 25, 1885.

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others June 24, 1884.

llnrrnn STATES PATENT Drrrcn.

HENRY L. HOPKINS, OF CARD, MICHIGAN.

SCROLL-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 324,842, dated August 25, 1885.

Application filed Ma G, 1885. (No model) To all whom it may concern;

Be it known that I, HENRY L. HOPKINS, a citizen of the United States, residing at Caro, in the county of Tuseola and State of Michigan, haveinveuted certain new and useful Improvements in Saw-Table Gages; and I do de elare 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 t0 the letters and figures of reference marked thereon, which form a part of this specification.

The object of my present invention is to pro vide suitable means for cutting from boards or planks curved strips, as stair-railings and the like, by first placing the article to be out upon a slant or pitch that will be coincident with the position the cut-out strip will assume when in its proper position as a finished article; and my invention consists in the combination of parts forming an attachment to scroll-sawing, upright, or endless belt machines, as hereinafter set forth, and pointed out in the claims, and is designed as an improvement upon Letters Patent No. 300,975, issued to myself and In the drawings forming a part of this specification, Figure I is a front elevation of my in vention attached to a scroll-sawing machine. Fig. 2 is an enlarged detail. Fig. 3 is an end elevation, part in section. Figs. 4c and 5 are enlarged details. Fig. 6 is a detail.

A represents an ordinary saw-table; D, the flywheel; P, the pitman connecting the crank of said wheel with the saw S. The upper end ofthe saw worksin the guide 9, depending from the beam B overhead.

0 O are guides or slideways for the lower end of the saw, and are attached to the bar B of the sawtable.

d d d are counter-shafts provided with conepulleys for regulating the feed, all of which are common.

To the beam 13 and bar B of the table I attach the horizontal adjusting-supports h h by means of the bolts and thumb-nuts t. Pivoted in the free ends of said supports is a vertical reciprocating or rock shaft, F. Said trated by the points 1: of said dogs.

shaft is round in its upper and lower portions,

1 having a square central portion, I-I. Pivoted thereto is a tilting arm, E, having the web or extension plate a, formed integral therewith, and said plate is provided with a circular channel, a. (See Fig. 4.) The tiltingarm E is bolted loosely at z to said shaft, forming a pivot upon which it swings. A bolt, t, works within the slot a, and by a nut on said bolt the tilting arm is held when adjusted, for the purposes hereinafter set forth. To the free ends of the tilting arm I attach the sliding dogs (1 cl, which are adjusted to or from each other by loosening the thumbserews c cand sliding the dogs as required.

WV represents the plank from which the curved material is cut, and is secured in position by placing the back edge against the vertical. portion a of the dogs 01 d (see Figs. 1 and 3,) the faces of the plank being pene- I also pass a screw through the hole 6 of the rear dog, which enters the edge of the plank, thus securing the material to be sawed firmly.

I attach to the sawguides O O the yoke m. (See Fig.2 and dotted lines of Fig. 1.) To

the upper end of said yoke I pivotally attach the curved rest or support R, which is located in front of the saw and supports the material being sawed.

()n the back side of the saw-table I locate the vertical shaft D,having cog-wheel a which engages with the cog-wheelf on a countershaft, d. (See Fig-3.) Said shaft is provided with a cone of pulleys, J, to regulate the speed of said shaft D, carrying the spool S. When said shaft is in gear, by means of the lever N, the spool revolves, winding up the cord or feeding-wire t, which passes over the adjustable hanger z to the rear corner or end of the plank NV, and by ahook, c, is secured to said plank. (See Figs. 1 and 3.) The hanger z is made to slide to and from the saw in the channel I) of the bar 0, which supports it, so as to bring the feeding-cord from the hanger to the lower end of the plank being cut in a direct line with the edge ofsaid in Fig. 3.

The operations in sawing are as follows: The nut or bolt is loosened when the tilting arm E is given the pitch to correspond with the slant of a stair-rail or the angle desired,

plank, asshown of the piece to be cut, when the nut is tightened. The plank W is secured by one edge to said bar by means of the dogs, as set forth, and to give the article to be sawed the desired are or curve the thumb-screwsr' are loosened, the reciprocating shaft F is moved toward the saw S to out a small curve, and from said saw to increase the curve by setting the supports it h to the scale L on the parts B B. (See Fig. 1.) When said shaft is in position, the thumbscrews z'are fastened. The plank W is swung around until the front end or edge meets the saw, when the hook to of the feeding cord t is attached, as shown in Fig. 1. The leverN is raised, as shown in Figs. 1 and 3, when the feeding-shaft D will be in gear, causing said shaft to revolve, winding up the cord 16, drawing the plank forward, up, and around as the saw enters, as shown in Figs. 1 and 2. The support R under the plank WV causes said plank to rise in passing over it, according to the pitch given it by the adj ustingarm E, and as said plank rises the reciprocating shaft is also raised, as shown by dotted lines in Figs. 1 and 4. As soon as the arc has been cut, the lever N is thrown down, stopping the feedingshaft D, when the plank swings back to the starting-point.

In Fig. l I show the saw cutting a leithand curve. To cut a right-hand curve the shaft F is detached and placed in a like position upon the opposite side of the saw, with the position of the tilting arm reversed.

NVhen desirous to use the saw-table for other purposes, the shaft F is removed, the yoke m and rest R are taken off, when I insert the table-top extension T, (shown in Fig. 6,) the arms 0 c passing under the stationary top, occupying the dotted position 0, (shown in Fig. 1,) the slot 3 receiving the saw, thus making a flat-top table for ordinary work.

In my former patent I employed a table through which the saw passed and upon which the material to be cut was placed. In my present invention I dispense with the table enof the tilting arm E, pivoted to said shaft, of

a pair of dogs mounted upon said arm, said dogs adapted to clamp the material to be cut,

of a pivoted support located in advance of the saw and below the material to be sawed, substantially as specified.

2. The combination, with an upright saw ing-machine, of the shaft F, journaled within the plates h h, said plates attached to the frame of the machine, of the tilting arm E, having the plate a, formed integral therewith, said arm pivoted to the shaft F, the means for adjusting said arm on said shaft, of a pair of dogs mounted upon said arm, said dogs adapted to clamp the material to be cut, and the pivoted rest It, located in advance of the saw and below the material to be sawed, as and for the purposes set forth.

3. The combination, with an upright saw ing-.machine, of the shaft F, journaled in the plates h h, said shaft having the tilting arm E attached thereto, said arm having the extension-plate n, and the means for attaching said plate to the shaft F, of'a pair of dogs adjustably mounted upon said arm, said dogs adapted to clamp the material to be cut, of the yoke m, supporting the rest R, the feeding-shaft D, its spool S, the feed-cord 16, its hook a, the lever N, and pinions for operating said feedshaft, as and for the purposes specified.

In testimony whereof I a'ffix my signature in presence of two witnesses.

HENRY L. HOPKINS.

WVitnesses:

R. J. PARKHURST, J OHN BULLEN.