US32662A - Cutting saw-teeth - Google Patents

Description

" NITED STATES PATENT FIC J. l). CUSTER, OF NORRISTOWN, PENNSYLVANIA, ASSIGNOR TO WM. MCNIECE, OF CONSHOI-IOCKEN, PENNSYLVANIA.

CUTTING SAW-TEETI-I.

Specification of Letters Patent No. 32,662, dated June 25, 1861.

To all whom 'it may concern.'

Be it known that I, J. D. CUsTER, of Norristown, in the county of Montgomery and State of Pennsylvania, have invented a new and Improved Saw Toothing and Setting Machine; and I do hereby declare that the following is a full, clear, and exact description of thev construction and operation of the same, reference being had to the annexed drawings, making a part of this specifica tion, in which- Figure l, is a perspective view of the machine. Fig. 2, is an end view of the upper and lower toothing punches in contact with each other, of the working size; and Figs. 3, and 4, are end views of the same.

j The same letters refer to like parts in each figure.

A, A, Fig. l, is the frame, or upright column. It is bolted to the floor with four strong bolts, so as to stand rm. I cast this frame in the form of a box, with the front partly open, and the back part, entirely open as shown at Fig. l.

B, B, is the table. It is bolted to the frame A, A, by means of an L shaped casting on which the table rests, which casting is bolted .to the front of the frame.

C, is the balance wheel, and D, is a pulley cast on the side of the balance wheel.

E, is the balance wheel shaft. It runs in common pedestals on the top of the frame, and it extends back beyond the top of the frame a sufficient distance to receive the balance wheel, and its pulley, on the back end of it, and also a clutch plate, which is firmly fastened to the extreme back end of the shaft, so as to form a clutch by a pin in the back part of the balance wheel catching the clutch plate, when the balance wheel is moved back against it. The said clutch plate is not shown, as it is behind the balance wheel, but it will be easily understood. The balance wheel and its pulley run loose on the shaft, so that they can be moved forward, or back, so as to run the balance wheel all the time, and when it is necessary to stop the punch, the wheel and pulley, is moved front, about of an inch, which causes its clutch pin to clear the said clutch plate, and the shaft and toothing punch stops.

Lever 4L Fig. l, is the stopping and starting lever. It is fastened on shaft W, near the lower end. This shaft works in piece X, near the top, and in a like piece at the bot tom, which is not seen, as it is behind the table; they are both bolted to the side of the frame, about half way back. Piece 5, is fastened on shaft IV, and its long end runs over toward the right, in below Y, and takes hold of a flat bar, or plate, which runs back about parallel with shaft E, and runs in a slide near the left side of the back pedestal, i

which holds it in place, and beyond the slide, it"takes hold of the pulley D, by means of a wide square hook which spans the pulley, and grasps it loosely, so as to move it back, to start the toothing punch, and front, to stop it. This sliding plate has a friction spring pressing on the inside edge of it, where it falls in V shaped notches, to hold it in the stopping position, and ruiming position. The said sliding plate, and friction'spring are not seen in the drawings, as they are behind shaft E, but they will be understood.

The balance wheel shaft E, has a cam on it, back of the front pedestal, which works the piece Z, and the saw feeding shaft V, V. It also has a cam or journal, formed on the front end of it, in front of the front pedestal, which is as much out of center with the shaft, as will give the toothing punch, the proper`stroke,-about three quarters of an inch. On this out of center journal, the connecting rod F, is placed. This rod has a box in the top of it, which is held down by the set screw Y, so as to take up the lost motion.

On the end of shaft E, in front of connecting rod F, I place a hand wheel, to work the toothing punch by hand, to adjust it to the lower punch, and to lift' the punch when it happens to stop down. This hand wheel, I have not shown in the drawings, as it would obscure some of the upper works, and the machine may be used with, or without it, as desired. Said connecting rod F, is attached to the plunger G', G, at 6, by a bolt which forms a joint.

I, I, are two dovetail castings which are bolted on the front of the frame, in which the plunger G, G, works. Each casting I, I, has a plate inside, lying on the bevel side of plunger Gr, Gr, and those plates are set up to the plunger by set screws, so as to take up all lost motion of the plunger, and cause the upper, and lower toothing punches, to work closely, and properly together, so as to cut a perfect, clean tooth. The said plunger Gr, Gr, has a slot, or chamber, cast in it, commencing just below 6, and extending down to the lower end of the plunger; it is five eighths deep, and five eighths wide, in a working machine for toothing small saws. In this chamber the toothing punch J, is placed, and fastened, by the arch, and set screw II, and it extends up to the screw head in the chamber, just below the upper Gr. This screw I use to feed down the upper toothing punch, as it is ground off on the lower end, to sharpen it. The piece 4, is a female screw which is tightly fitted in the upper part of the plunger chamber, andthe feeding screw at Gr, works in it, so as to feed down' the punch six, or eight, inches in a working' machine.

I make my toothing punches, J, and K, out of five eighths steel bars, each about a foot long, and I plane them out from end to end as shown at Fig. 2, Fig. 8, and Fig. 4L.

K, is the lower toothing punch, and it is laid in a slot, or chamber, cast in the L shaped casting on which the table B, B, rests. It is held in place by a clamp, and screw, and it reaches down to the piece M, M, where it rests on the head of bolt L, which is used to feed it up as the punch is ground off at the cutting end to sharpen it. Said piece M, ^M, is bolted on the front of the frame, by two, or four bolts, as shown at M, M. When my said toothing punches are so much worn as to be too short to use, I weld a piece on, so as to use up the whole of the original toothing punches. As the punch J, presents its sharp edge to the set screw H, I place a brass box as a protector under the arch, which lits on the sharp edge of the punch, and the set screw I-I, presses on the brass protector, and thus holds the toothing punch without injuring it.

N, N, is a shifting guide. It is attached to the table B, B, by bolts shown near N, N, with sunken square heads, or rivets, so as not to turn, which bolts slide in short slots cut in table B, B, so as to slide back, for toot-hing large deep teeth, and forward for small fine teeth. The two said bolts have nuts, or female, thumb screws on them, under the table, by which they are fastened,'to hold the guide N, N, to the proper place. This' guide has a bar marked 8, 3, riveted on the back edge of it, against which the saw slides when in the act of being toothed. This bar is partly cut away to allow the punch to come down, and the guide plate N, N, is also cut open in the center, so as to let the lower toothing punch come up to the level of the carriage 2, 2, so that when the saw blanks lies on the carriage, it will also lie on the top of the punch. The guide bar 3, 3, may be made straight, so as to tooth saws straight, if the blank is cut straight, or rounded, if the blank is cut so, as the blank is held up to the guide by the operator or by springs fastened to the carriage.

I), is a thumb screw, it is screwed in the top ofbar 3, 3, and it holds down a short be clamped on the carriage, or held on with i springs, instead of the hand of the operator, as may be desired.

The carriage 2, 2, I make longer than any saw intended to be toothed on it, so as to make the feeding rack, or ratchet plate R, longer than the saws, but not longer than the carriage, on which it is fastened. I fasten this feeding ratchet plate, on the front of the carriage, with two sunken bevel headed screws, as shown. I use as many different feeding ratchet plates, as I wish, to tooth all the different numbers of teeth to the inch, or I use a line toothed feeding ratchet plate, to tooth coarse saws, by moving, 2, 3, 4, or more teeth of the ratchet plate at once. The carriage 2, 2, has a V guide under it, under the ratchet plate R, and it runs in a V guide, which is planed in the table B, B, from end to end, as shown at Fig. 1. The back edge of said carriage lies on, and slides on the plate N, N, in front of the lower toothing punch.

I under cut the back edge of the carriage, and bevel off the useless part of the front edge of the top of the lower punch, so as to get the back edge of the carriage, to reach back as near the upper punch as possible, so as to enable me to tooth wide saws, and also very narrow ones, on the same carriage. This undercutting, and beveling, is not necessary when it is not intended to tooth narrow saws, on the same carriage. The feeding ratchet plate teeth, must extend out over the front edge of the carriage, so that the sharp end of the click T, will not rub against the edge of the carriage.

O, is a small spring, which is fastened to the table B, B, and it is used to keep the carriage from moving too easy, by pressing on the ratchet plate R, or on some other part of the carriage. This said spring O, is however not necessary, when the machine is not intended to be run fast, as the feeding click T, will not give the carriage undue momentum, unless the machine is run fast.

S, is the feeding crank, with the click T, working on a pin on the end of it, which click is held on the teeth of the ratchet plate, by a spiral spring, seen at T, Fig. l. Said crank, is on a shaft which fits in a hole made in the table, and extends down under the l l l table, where the feeding lever 7, is fitted on it, as shown at Fig. l. It has a long slot in the long end, in which a set screw is fitted,

on which set screw, a connecting rod is fitted,-

which connecting rod, runs back under the table, and is fitted on a pin, on a short crank on the lower end of the feeding shaft V, V, so that when the cam on the balance wheel shaft E, moves the piece Z, back, said connecting rod, draws the slotted end of lever 7, back under the table, which moves the click T, forward from T, so as to move the carriage forward one tooth, or more, as desired. The short crank, on the lower end of the feeding shaft V, V, is not seen, as it is below the table, but it is a common crank, pointing in the same direction as piece Z on the top of this feeding shaft, and it will be readily understood. On the short end of lever 7, a strong spiral spring is attached, and it extends back, under the table where the other end of the spring, is attached to a stout pin, or hook, so that when the cam moves the piece Z, back and the feeding click T, forward, the spiral spring will bring all the feeding gear back again ready for another move of the carriage, &c. A spiral spring, may also be attached to the short end of piece Z, if it is desired, to assist the rst described spiral spring.

At U, Fig. l, is a pin screwed into the top of the table, or riveted in, so as to be loose, so as to turn, and against this pin where it is about half cut away, and is half round, the tail end of click T nearly touches when the machine is in operation, but this pin has a thumb piece or knob to the top of it, not shown, by which the operator can turn it quarter, or half around, which brings the full part of the pin, against the tail of the click, and throws it out of gear with ratchet R, so that he can draw the carriage back, and put on another saw, without stopping the punch. In toothing saws which are toothed from end to end, it is not necessary to stop the punch to put on saws, and take them off, but in toothing wood saws, &c.,

which are not toothed to the ends, it is necessary to stop the punch.

The feeding 'cam on shaft E, must be set so as to begin to feed, when the toothing punch, is nearly up, so that the punch will not interfere with the feeding apparatus.

The above described machine, is well adapted for setting saws, and it requires but little to arrange it to set saws. The upper toothing punch J, can be ground the proper bevel, and thus used for a setting'punch, and the lower toothing punch, can be taken out and ground, to the proper bevel, and put in with the plain side'back, so as to form a setting anvil for the upper punch to strike on, or new setting punches may be made as desired, and put in in placeof the toothing punches. The stroke of the setting punch, must be regulated by the screw near G, s0 that it will strike each tooth in a proper manner, to give it the proper set.

The feeding apparatus is the same in setting saws as in toothing them, excepting that the connecting rod, which connects shaft V, V, to lever 7, must be set in on the slot of the said lever, near 7, so as to give a longer stroke to click T, and move the carriage so as to move the saw to be set, two teeth at once. After one side of the saw is set, it is turned upside down, and the other side is run through and set, in like manner.

Vhat I claim as my invention, and desire to secure by Letters Patent is- T he combination of the plunger Gr, G, and its long screw and long nut 4, with the toothingpunches J, K, all substantially as described and shown for toothing and setting saws.

J. D. CUSTER. lVitnesses:

L. E. CoRsoN, B. F. VAN COURT.

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