US63407A

US63407A - Thomas t

Info

Publication number: US63407A
Authority: US
Publication date: 1867-04-02
Anticipated expiration: 1884-04-02

Description

@einen tatrs gatrnt @fitte THOMAS T. MARKLAND, JR., OF PHILADELPHIA, PENNSYLVANIA. Letters Patent No. 63,407, elated-April 2, 1867; anterlated February 26, 1867.

IMPROVEMENT IN MACHINES IOR SEARPBNING SAWS.

TO ALL WHOM IT MAY GONCERN:

Be it known Ithat I, THOMAS T. MARKLAND, Jr., of the city and county of Ihiladelphia, and State of Penn- Sylvania, have invented a new and useiul Improvement in Machines for Sharpeninglthe Teeth oi Saws; and I do hereby declare that the following` is a full and exact description thereof', reference being had to the accompanying drawings, and to the letters of reference marked thereon.

Wy invention consists in a machine for sharpeningsaws by the use of an emery or other wheel, which is adjustable to give the required angle to the teeth, right and left, in connection with reversible portable rest, varied to suit any angle of the edges of the teeth, o r to sharpen them square.

The construction and operation of the machine will be understood bythe following description. In the accompanying drawings- Figure l is an end elevation of the improved machine.

lFigure 2 is a side elevation of the saine.

Figure 3 lis a top view or plan of ditto.

Figure 4 is a plan ot the extension rotary rest D.

Figure 5 is an edge view of the same.

Figure 6 is a reversed plan of ditto. Y

Figure 7 is a plan of the sliding rest P, to be used in sharpening straight saws, having a saw in connection.

Figure 8 is an end View of ditto. v

Like letters in all the tiguresindicate the saule parts.

A is an ordinary bench for holding the several parts of the apparatus. B isI a reversible and portable resin' which is supported by the standard C, there being a longitudinal slot, a, in the top of the bench to receive the tenon 6 ci' the standard, and to provide for the shifting ot' the latter to regulate the distance of the rest from the grinding-wheel, hereinafter described, to suitsaws of diierent sizes. D is a rotary clamping-disk, to be used in sharpening circular saws. It has a central shaft, c, firmly secured therein, and projecting through the clamping-plate E, which is confined upon the `saw F by means of the key df The said shaft c also projects downwards, and its in a hole in the rest B, in which it revolves as the saw is shifted for sharpening. The clamping-disk D has extension arms e, adjustable by means of the screws f and slots g, as seen in iigs. 4, 5, and 6, so as to regulate the disk for saws of various sizes. The'upward projecting part oi' the shaft c is made the size ofl the eye of the smallest saws, and senlarged by means of thimbles to suitk larger eyes. For the purpose of turning the' rest B to various angles to give the various bevels which may be Adesired to the edges of the teeth of the saws used for cross-cuttiug, it has ajoint connection withthe standard C by means of the pin it, which passes" through the cheeks it', that project from the lower side of the rest, and through the standard. There are set-screws jj in` the arms k c of the standard, for adjusting the rest to the various angles. When the teeth of the saws are to be sharpened square across, the screws are brought up tight to the rest when the latter is brought into a horizontal position for that purpose, as represented in figs. I and 2. For holding the saw in position, so that it shall not shift either way while being filed, there is a finger, Z, on the strip G, the said strip having a slot, m, for its adjustment,'and being` conned to the front edge ofthe bed-plate by means oi the screw n., as seen in iig. 1. I-I is an emery-wheel, for grinding the teeth of the saws. l It is removable from its shaft I by means of the screw boss clamp o, so'as to change the wheel for others in accommodation to the saws, the edges of the wheels boing made ot` such shape as to correspond to the notches or serrations, which give shape to the teeth. The said shaft I is hung on centres pp, in the arms g q, which project upward from the shaft L The said shaft turns partially 0n the centre-pins 7' r, in the jaws s s of the swivel-plate K, so that the wheel H may be shifted in and out of the serrations, there being n. handle, t, projecting from one of the arms g for that purpose. By means of the setiscrews uit, in the cheeks r r of one of the jaws s, the inward and outward motions of the wheel H are regulated. The swivel-plate K is adjustable on the screw-holt w. The latter is screwed hard upon the plate to hold it securely'in position. There may be adjustable stops, consisting oi' pins, placed in holes in thc top of the bench A, or set-screws, or other simple device, to take the strain off theholt; When the teeth have equal angles each way the swivel may be set square across the bench. This may be done, also, when the teeth have unequal angles, as represented in the drawings, by making the edge of the grinding-wheel to correspond. L is adriving-pulley on the shaft I. For the double purpose of blowingvthe dust from the teeth of the saws, and for creating a current of air, as the shaft I revolves, to keep the teeth cool, I place fans x on the movable and standing bosses o and o. As auxiliary to the fans I place a lump of ice, M, in the pan N, for cooling the air before it is taken up by the fans. In figs. 7 and 8, O represents a straight saw. I is a dove-tailed rest, which slides in the female dove-tail y across the rest B, to bring the teeth of the saw iu succession into connection with the grinding-whcel II, the rotary clamping-disk D, and clamping-plate E, as well as the dove-tail plate Q, Which is merely placed in position to fill up the space for more eiiiciently clamping circular saws, having been removed, R is a clamping-plate, for securingr the saw on the rest. S S S nre the clamps. There may be a number of holes in the plate Q, across the middle, ranging with the centre hole, through which the lower projection of the shaft c passes, for the adjustment of saws of different sizes, so .as to obviate the necessity of giving much variation to the extension arms e. IThere must, in this case, be corresponding holes in the rest B. I true the edge of the emery-wbeel H, or bring it into the proper shape, by means of a hot toolor bar of iroii or copper. To give increased expedition to shnrpening straight saws there may be placed a plurality of grinding-wheels, H, so as to sharpen several teeth at one operation; or there may be several cutting edges to the wheel instead of one, as represented in the drawings. v

What I clnim as my invention, is- I l. A reversible and portable rest, B, connected with the standard C, adjusted by means ot' the set-screws jj, and arranged and operating substantially as described and for the 'purpose specifiedl 2. The clamping-disk D and clamping-plate E, when arranged in relation to thel rest Band saw I", substantially as and for the purpose set forth.

3. The combination of. the clamping-board P with the rest B, operating lsubstantially as described' and'` for the purpose specified.'

4. 'lhe combination of the shaft J', having arms q q, with the swivel-plate K, the said arms being adjusted by the set-screws u u, substantially as described and for the purpose specified.

5. The'slotted finger or catch-strip G, when arranged and operating in relation to the saws F and O, substantially as described. l l

6. The fans at, arranged in relation to the emery-Wheel H, substantially in the manner described and for, the purpose specified.

y In testimony that the above is my invention I have hereunto set my hand and affixed iny seal this fourteenth day of January, 1867.

THOS. T. MARKLAND, JR. D.. s]

Witnesses:

STEPHEN Us'rrcit, JOHN Wnur.