US94028A - Improvement in saw-sharpeners - Google Patents

Description

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HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH CA dilute-ll mes GEORGE PRICE, OF-PEORlA COUNTY; ILLINOIS.

Letters Patent No..94,028, dated August 24, 1869.

IMPROVEMENT IN SAW-SHARPENERS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom yit may concern; A

Be it known that I, GEORGE PRICE, of the county I of Peoria, and State of Illinois, have invented a new and improved Machine for Sharpening Saws; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the annexed drawings, making a part Iof this specification, in which like letters of reference refer to like parts, and in which- .Figure 1 represents a perspective view.

Figure 2 is a vertical section through centre of machine, looking toward the adjusting-apparatus and saw.

Figure V3 is a side elevation.

Figure 4 is a plan view, with file-device removed, to show feeder.

This 'machine is for ling the teeth of any straight saw, which it does, by the adjustment-.devices to a mathematical nicety.

lt consists ot' a frame, A A,B B, on the rear portion of which is set a bed, K, which carries the device for filing the saw, which device consists of a trough, O, with parallel sides, the back part of which carries a spur\vheel, Y, and hand-crank, Z, which former is engaged with a pinion on a balance-wheel on the outside ofthe trough.

The pinion carries a crank, XV, which is connected by a rod, u, with a reciprocating frame,1, carryingy the tile q.

The arms :c ot' thc trough C project some distance in advance ot' the front of the machine, and carry. the

slides in whichfthe file-frame lr moves, and is'immediately over the clamps which confine thesaw.

The file-frame 1' is mounted on alng bar, working in slots pendent from beneath the arms x of the trough.

Adjustable clamps, m ci, at each end of the frame fr, carry the file q between them.

The forward clamp encloses a cylindrical head, q', in which the triangular point of the iile is held, and by the setting of which the file is held at any required angle. I

Set-screws, t t t t, mise or lower the file-frame, and give its forward end the required pitch.

The inside of the arms x ot' the trough support a horizontal slide, h h, clasped bya guide, -i e', projecting from the top ofthe frame lr.

The clamps E lfhcnfining the saw d '(1, are 'at the point ot' thcmachine, lying, when not otherwise set, at right angles to a'ud horizontally under `the filingapparatus, being fastened to the upper surface of slide D', which moves withina horizontal bed, D.

The latter, D, is supported by the head of the vertical shaft F, which passes through the circular bed-- plate H, just under the horizontal bed D.

l This circular bed-plate H is let into and is supported by the upper horizontal brace of the frame B of machine. v

The shaft F, above mentioned, sustains the whole of the saw-adjustments, and is stepped on the end of a horizontal lever, a., which hasa pivot in thc vertical brace f, in the centre of machine.

Below this lever is another one, whose fulcrum is a holt .in a jaw bolted to a cross-bar of the frame.

One end of the lever is united to the middle and under surface of the former lever a, its remote end terminating in a treadle, G, and may be depressed by the foot, or it may be 'made adjustable by means of a screw-r0d, g, and hand-wheel, to raise or lower the Jsaw toa hairs breadth. v

Just above the step of the shaft 11, the latter passes through a corresponding opening ina horizontal bar, L, designed to act as a guide, and to this bar L, at either end, are fastened the ends of a segmental guide, y, whose centre is the shaft F. l

An arm, d, armed with a vertical blade at its further extremity, which fits either of the slots cut in the 'interior edge of segmental guide, according to adjustment, isthe means of setting the shaft 4and its saw-adjustment to the required angle for iiling.

Another horizontal arm, e, projecting from said shaf F, embraces and slides up and down ou vertical bar lr, which terminates in a shoulder under a lever, i, hereinafter described, and below in aslot which embraces' the interior edge of segmenty.

A slot is cut through the barb, at the partemb'raced by the arm e, into which a key, running in eyes on the surface of the bar e, slides.

A spring, h, keeps the shaft tight down on the lever' a.

The red lilies in fig. 4 show one of the positions of*v saw-bed D, and howI it swings on the snpportingfshaft F. The dotted red lines in .the other diagrams show vertical movements of the shaft and its attachments. 'lhe motion lof the feeding-attachment is derived from a vertical arm, b b, passing up through a semicurcular sl'ot in the circular bed-plate H H, and terminating, beneath the latter,'in the head a a.

A shoulder or a neck wit-hin the slot contines it to its place, allowing the arm to move cirularly with the saw-bed, but not to rise with feeding-attachment.

To the upper end of this arm 'b b, and beneath the feed-bar, is pivoted a lever, which is its flllcrnm. One end of the same is pivoted to the side of the saw-bed D; the other, and longer end, 'to the longer-arm of a lever or cam, o, the segmental head of which presses against the under side of the horizontal feed-bar m, which terminates in a triangular end, p, which slides. the saw by pressing'on the teeth.

The remote end of feed-bar m turns on a raised pivot,

of the saw-clam from which a curved spring, ff, is carried to near the pointof'the feed-bar, to which place it is fixed.

A slot, in the centre of this har fm, retains (by means of a pin) the end of a short horizontal lever, l, which is' attached to the upper point of a quadrant-shaped lever, t', its fulcrnm being near the lower side of the saw-bed D, and immediately beneath this point.

To the further point of this riever, which is near the end of saw-bed, is pivoted the end of another horizontal lever, t fi, the other end of which is fastened to the vertical side of a block', g g, which sustains the pivot ofthe feed-bar m. y,

The operation of this machine is as follows:

The saw d d is first inserted between the clamps E E, on the movable bed-boardD, andthe two hooked gauges e e, which move on a rod fastened to the side ps E A 4, gauge the saw to a horizontal position.

The height of the saw is now to be regulated for the depth of tile-cut in the teeth, by means of the adjustable block k 7c and thumb-screw on the shaft F,

which prevents vthe rise of shaft beyond the top of block, by striking of the latter against the under side of the beam above it.

'I he treadle-levcr G is now depressed, or it may be done by'a screw and wheel, (as `at g.) "lhis brings the saw up to the file, which is operated by the crank z, the connecting-rod u operating the file and flame, in the guides 'on the arms x of the trough O. The Viile4 can be set at any angle required; but to file the alternate. teeth diagonally, an inclination is given tol'the saw-bed by adjusting the blade at the end of arm d of shaft F, in either of the slots in the semicircular guide y y. This arm forms a steady stay to the sawbed during the action of file on the saw. (The red lines in fig. Lleshow one of its positions thus adjusted.)

As each eut is made, tile shaft is lowered;l at the same time'the feed-bar m, pressing against the sawteeth, carries the saw and bed-boardor slide one tooth tothe right or left, as required.

. When the alternate teeth of saw are cut at one angle, the saw-bed can be swung round in the opposite position for the next cut7 the file making exact and'clear cuts, vand at equal distances, and thesame file lasts on this machine a long time, for the reason that there is no twisting motion given tothe ile,wl1ich, when used for saw-filing vby hand, the teeth of file are soon broken off, and the file spoiled, and then not making clean work.

The level or inclination of the ile is regulated by the' set-screws t t t acting on the guide h. h, fig. 3, by which thefront extremity only of the bar S is inclined, the lrear portion sliding in a close-fitting slot.

The operation of the feeding-portion needs, perhaps, extra description.

Thepressure on the treadle G is the .means of motion to feed-bar m'. Thus the pressure on the treadle throws up the saw-.bed D, raises the end of lever i,

Aand causes the curved spring f f to throw back the point p of the feeder m horizontally. The saw-bed still rising, carries up the fixed eind of lever 11., whose centre part is pivoted to the arm l; l), which projects npward through the slot in the block g g, fixed in the circular bed-plate H, depresses the other end'of said lever n, and that of the lever 0, to which it is attached,

and causes tlie segmental' head of the :latter to press upward the point of the 'feed-bar m, (ready for it, by

f its return, to inove the saw for the next cut.)

The le is no w set to work by means of the crank z, and whenl tiling is done for that time, the treadle is released. The spring h forcing the shaft F and saw-bed downward, a reverse action of the levers ensues, bringingv the point p of the feed-bar down onto the saw, againstv the vertical edge of saw-tooth, and the feedbar now makes its final movement, and carries the same one toothtoward-the' left of the operator at the front of the machine.

The extent of thc horizontal movement of the feedbar m is regulated by the thumb-screws c c c c, on the projecting heads on each sideof the said bar. The process is now repeated until the filing is done.

C' latins.

Having thus fiilly described my' invent-ion,

That I claim therein as new, and desire to secure by Letters Patent, is l. The vertical shaft F, having an arm, d, provided with a blade, in combination with the slots ofthe semicircular guide y y, and the movable saw-bed D, substantially as and for the purpose set forth.

set-screw with the vertical shaft F, substantially as and for the purpose described.

3. The treadle G, lever a, and vertical shaft F, withspring h, in combination with .the movable saw-bed D, substantially as described.

device m, for feeding the teeth of the saw to the tile q, substantially as described.

5. The Alevers fi, k, l, m, a, and o, spring ff, vertical bar b, and vertical arm b b, so constructed and operating as to give the required feeding-movement to the feed-device or bar m, substantially as described.

` .6. '.lhe arm e and vertical bar b, in combination with the shaftl F, semicircular guide y y, and lever i, substantially as described.-

7. The movablesaw-bed D, with slide D', and block g g, having the feed-device or bar m pivotedto a post thereon, in combination with the circular-.bed-plate H and shaft F, when constructed and operating substantially as described.

8. The bed-plate K, trough 'wheel V, and pinion, balance-wheel, crank W, and arm '11, connecting with tile-frame, all constructed and arranged as herein described.

9. The combination of the set-screws t t t with the guide h h, so thatthe required pitch or inclination may be given to the forward end of file, substantially as described.

10. 'lhe adjustable file-clamps 'm m and bar S, working in pendent slots from the arms x of thetrough C, inv combination with the arm u, constructed and operatingsnbstantially in the manner and for the purpose as set forth. i 11. lhe combination of the gauges e c e c, as, arranged on the rod with the saw-clamps E E, substantially as described.

'In testimony that I claim the foregoing saw-sharpening machine, I have hereunto set myhand,.this 31st day of March, 1869.

GEORGE PRICE.

Witnesses EDMUND THUnLow,'f HENRY Wi lVuLLs.

2. The combination of the adjustable block lc It and 4. Providing the movable saw-bed D with a feed- C, with arms x, spur-

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