US663871A

US663871A - Scroll-sawing machine.

Info

Publication number: US663871A
Authority: US
Inventors: Thomas Curley
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-09-25
Filing date: 1899-09-25
Publication date: 1900-12-18
Anticipated expiration: 1917-12-18

Description

No. 663,87l.V

PatntedV Dec. I8, |900. T. CURLEY.

SCROLL SAWING MACHINE. (ppucation med sept. 25, 1899.)

(No Model.)

o.. o mw mi n" e D d e t n e t a DI v.. E IL R nu .c .n 8, 3 6 6 n" N SCROLL SAWING MACHINE.

(Application le Sept. 25, 1899;)

' 2 Sheets-Sheet 2!.

(No Model.)

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THOMAS OURLEY, OF TROY, NEW YORK.

SCROLLUSWlNG MACHIN E.

SPECIFICATION forming part of Letters Patent No. 663,871, dated December 18, 1900.`

Application iiled September 25, 1399- Seral N0- 731,628. (No model.)

T0 all whom it may concern:

Be it known that I, THOMAS OURLEY, a citi- `zen of the United States, residing at Troy, in

the county of Rensselaer and State of New York, have invented a.new and useful Improvement in Scroll- Sawing` Machines, of which the following is a specification.

My invention relates to sawing-machines, and more particularly to that class known as scroll-sawing machines, the object of the invention being the production of an improved machine of that class in which means are provided for readily and easily making all of the adjustments of parts necessary insuch machines, all the parts being strong, durable, and economically constructed and the general operation being improved.

In the drawings forming part of this speciiication, Figure 1 is a view in side elevation of a machine constructed in accordance with Inyinvention. Fig.2 is an end elevation thereof. Fig is an enlarged detail vie w,in end elevation,of the head of the machine. FigAE is an enlarged detail view of the table,partly broken away. Fig. is asectional view on the broken line 5 5 of Fig. 4c. Figs. 6, 7, and 8 are detail views of detached parts to be hereinafter described. Fig. 9 is a detail view illustrating the keeper for the saw-guide-operating lever.

Like numerals of reference mark the same` parts wherever they appear in the several figures of the drawings.

Referring to the drawings by numerals, 10 indicates the base or pedestal, and 11 the arm or gooseneck, these two parts being formed of three cast hollow pieces secured together by bolts and forming theframe of the machine, being adapted to be secured to a bench or other suitable support by means of bolts 12. Upon the frame is pivotally secured the table 13, which is pivotally mounted and adj ustable onV its pivot' to vary its inclination from the horizontal, being secured at any desired inclination by means of a set-bolt 14:, passing through a curved slot l5 in a plate 16 and threadedinto the arm, such adjusting means being of a well-known construction.

17 indicates the saw-plate, made of metal, as are all the parts of the machine with the exception of the table 13, to which the sawplate is secured by dowels le, as seen in Fig.

4. The particular construction of the sawplate will be describedlater on.

l5 indicates a iixed block or head secured by bolts 16a to a bracket 17a, which in turn is secured to the arm or gooseneck 11 by bolts 18. The head or block 15t is provided on its rear side with a rib or tongue 18, over which a groove 19 of a sliding` block or strain 2O fits and is slidable, the block 2O being fixed at dilerent heights on the head by means of a pin 2l, fitting in registering holes in head and block.

22 indicates a link, of which there are two, one on each side of the head and projecting beyond its edge, overlapping and secured to the sliding block. In the outer ends of these links are slots 23, in which is journaled a shaft 24, having a cam or eccentric 25, as shown in dotted lines in Fig. 3, between the links and bearing against the head. The shaft 24 is turned by a hand-wheel 26 and by the cam bearing against the head securely clamps the sliding block toit. The'position of the shaft 2/lin slots 23is adj usted by set-screws 27. At the upper end of the block 20 is journaled a Semicircular casting or half-pulley 28, and a strap or band 29, passing over said half-pulley, is secured thereto bya screw 30 at a point nearerthe pivoted center than the rim. This band 29 is carried down from this point and provided at itsend with a plate 3l, having an opening to receive the hooked upper end of aspring 32, coiled in a space in the sliding block and attached at its lower end to a screw 33, passing through a plug 34 and adjustably held by a thumb-nut 35. The opposite end of the band 29 passes from the rim of the halfpulley downward through the block, being provided at its lower end with a metal plate or hook 36 to engage the upper end of the sawblade 37. On its passage downward the strap or band 29 passes through the lower end or head of a bracket 39, which is adjustably secured to the lower end of the sliding block by means of a bolt 40, passing upward through a slot in the bracket and into the bottom of the block. By adjusting the bracket the band can be guided and controlled in its reciprocation, so as to avoid lateral strain on the saw. The spring 32 holds the band in its withdrawn or raised position IOO and serves to give thel upward stroke of the a hole in the strip 68, a dog 74 preventing it saw. The lower stroke is effectedby means of a pitman 4l, connected at its lower end to a crank or wrist pin 42 on a disk 43 at the end of a shaft 44, journaled in the frame of the machine and driven by a belt 45 from, any lineshaft pulley, said belt engaging on fast and loose pulleys 46 and 47 on said shaft 44.

48 indicates a treadle-lever pivoted to a standard 49, projecting rearward beyond its pivot and carrying a pivot-ed brake-shoe 50, adapted to engage the periphery of the disk 43 when the treadle is depressed. The rear end of the treadle-lever is forked, as at 51, and embraces the horizontal arm 51a of a bellcrank or elbow lever 52, pivoted at its angle to a standard 53. The vertical arm 54 of the elbow-lever is provided with pins 54a to engage on opposite sides of the belt. By this means the belt is shifted to the loose pulley 47 when the brake is applied. To release the brake and shift the belt back to the fast pulley 46 in order to start the machine, the treadlelever is provided at a point in the rear of its pivot with an upwardly and forwardly projecting arm 55, having a treadle 56 near its upper end projecting frontward, and by pressing the foot upon the treadle 56 the lever is depressed in the rear, thus shifting the belt and releasing the brake simultaneously.

In its reciprocation the saw-blade is guided by running in a space or notch 57 between two plates 58, adjustably xed by screws 59 to the face of a block secured on the end of a horizontal bar 6l, said bar being split, as at 62, and secured in the block 60 by means of a bolt 63, threaded through one half and bearing against the other, so as to spread the parts apart in the block. The horizont-al bar is adj ustably fixed in the lower end of a vertical bar 64 by a set-screw 65, said bar 64 being vertically adjustable in the head 15a and securable at any height by means of a setscrew 66. By adjusting the plates 58 the space or notch 57 may be widened or narrowed to suit different thicknesses of saws. By adjusting the horizontal bar in the vertical bar the saw may be pressed forward or allowed to go farther back, and by adjusting the vertical bar the position of the guide may be varied vertically by raising or lowering the vertical bar in the head.

The saw-plate 17 is adjusted with relation to the saw so that the blade reciprocates at the center of the plate, and in order to keep the saw in perfect alinement it is caused to pass througha kerf 67 in a wooden strip 68,

dovetailed to slide in a radial slot in the sawplate. This strip, preferably of hickory wood, is provided with a series of holes 69 in one side to receive the point of an elastic lever 70, said lever being pivotally and slidably connected to the saw-plate bya pin 7`1, which projects through a slot 72 in the lever. The elastic lever passes under a curved keeper 73. With the lever in position shown in full lines in Fig. 4 the lever is held pressed into from moving laterally, and a pin 75 bearing against the keeper prevents its longitudinal withdrawal. When moved to theposition shown in dotted lines in Fig. 4, which movement is permitted by the release of the dog, the pin 75 is opposite to the recessed portion 76 of the keeper, thus permitting of the longitudinal withdrawal of the lever-and the releaseof its point from the hole in the slip. The kerf in the strip having been worn too large, the strip is drawn out of its seat, sawed off at the line 67, a new kerf cut in the end, and vthe strip replaced, thus always keeping a perfect alinement of the saw.

78 indicates the casing of a fan, secured in position by. bolts 79, a discharge-spout 80 leading down in close proximity to the sawblade to clear away the sawdust out of the lines to be followed on top, and a dischargespout 8OZt following the gooseneck, as shown in dotted lines in Fig. 1, and discharging under the table to keep the guides 81a clear of sawdust, the fan being secured on a shaft 81, having a grooved pulley 82 to receive a cord belt 83 from a grooved pulley 84 on a shaft journaled in the fan-casing, the shaft 85 being driven by a belt 86, engaging a pulley 87 on the shaft.

In the operation of my invention the downward or working stroke of the saw is positive, as before described, and the upward or return stroke yielding. Saw-blades of different lengths may be used by adjusting the position of the sliding block on the head. The saw is guided and controlled in its movements to produce the best results and the whole machine simplified and its utility increased.

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

1. In a scroll-sawing machine, the combination of the gooseneck, the head rigidly secured thereto, a slidable strainer-block adjustably secured to the head, links embracing the head and secured to the strainerblock, a shaft journaled in the links, and a cam on said shaft between the links and bearingl againstthe head, substantially as described.

2. In a scroll-sawing machine, the combination of the gooseneck, the head rigidly secured thereto, a slidable strainer-block adjustably secured to the head, a half-pulley pivoted to the block, a band or strap passing over said half-pulley and secured thereto, a spring engaging one end of the strap to draw it downward, a saw-blade secured to the opposite end of the strap or band, and means for drawing the saw-blade downward, substantially as described.

3. In a scroll-sawing machine, the combination of the gooseneck, the head rigidly secured thereto, a slidable strainer-block adjustably secured to the head, a half-pulley pivoted to the block, a band or strap passing -spring engaging one end of the strap to draw it downward, a screw on the lower end of the spring, said spring passing through an opening in the head, a plug for the lower end of the opening, having a hole through which the screw passes, and a nut on the screw below the plug, substantially as described.

5. In a scroll-sawing machine, the combination with a reciprocatory strap for carrying the saw, a slidable block to which the strap is secured, a right-angled bracket, the vertical arm of which is provided With a guide for the strap, and a bolt passing through a slot in the horizontal arm into the bottom of the block, substantially as described..

THOMAS OURLEY.

Vitnesses:

`WM. C. FEATHERS,

HAROLD K. DOWNING.