US83805A - Improvement in saw-set - Google Patents

Description

R. W. TYLER.

Saw Set.

No. 83,805. I Patented Noy. 3, 1868.

RICHARD W. TYLER; OF VVAY'NE, MICHIGAN.

Letters Patent No. 83,805, dated N o'vembcr 3, 1868.

IMPROVEMENT IN SAW-LSE'I'.

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

Toall whom it may concern.

Be it known that I, RICHARD W. Trans, of Wayne, in the county of Wayne, and State of Michigan, have invented certain new and useful Improvements in Saw- Sets; and I do hereby declare the following to be a full, clear, and exact description of the same, suliicient to enable those skilled in the art to which my invention appertains, to fully understand and use the same, reference being had to the accompanying drawings, forming part of this specification, and in which Figure l is a side view of my improved saw-set.

Figure 2, a plan view of the same.

Figure 3, adetailview of one of the parts, to be hereinafter more fully referred to.

'Fignre 4 is a detached view of parts, to be hereinafter referred to.

My improvements relate to that class of saw-sets in whicha movable die, operated by means of a lever, is employedto give the required set to the teeth of saws.

The main object of my invention is to provide a simple and effective means for feeding the saw along automatically, so as to bring the teeth in the proper p0si .ion under the die.

'To this end my invention consists in providing the adjustable saw-holder with a rack, with the teeth of which those of a pinion engage, and in operating said pinion simultaneously with the die by means of a pawl applied to the same leyer, whereby the die is actuated, together with other minor improvements: as will be hereinafter more fully described.

In order to enable others to make and use my improved saw-set, I willnow proceed to describe the same in detail, referring to the accompanying drawings, in which similar letters indicate corresponding parts in the several figures.

In the drawings, A represents the frame of the ma chine, which may be made of cast-metal,and is adapted to be secured to the top of a bench or similar surface by screws passing through holes a a a, formed in the rear extension of of said frame A. The form of the frame A, which'is substantially that shown in the drawings,is such as to adapt said frame for the reception of the 'operative mechanism, as willbe now described.

The die B is fitted to move vertically within a socket formed through the arm b of frame A. The front part of thedie is made v-shaped' in its cross-section, and is provided with a vertical rib, c, at each side, which fit into corresponding grooves in the sides of the socket, and serve as guides for the anvil-block, as clearly shown in fig. 2. The lower face of the die is inclined as shown in fig. 1, corresponding with the inclination of the stationary 'bed' 0. As these parts are exposed to wear, I have found it advisable to apply to each, the bed and die, a facing of steel, (1 e, respectively. (See fig. 1.

D represents the operating-lever, pivoted between the arms-g g of frame A by means of a rod, f, which passes through an opening formed in said arms. The lower portion of lever D is rounded at the front, and is provided with teeth 2', which engage with corresponding teeth formed on the rear side of die B. A spring, K, is interposed between the under side of lever D and the base of frame A.

E is a u-shaped gauge, pivoted at Z l'to the opposite sides of frame A, its extremities, m m, being bent down so as to touch thev inclined platform or bed 0.

The saw-holder is ahorizontal-toothed bar, F, adapted to be moved backwards and forwards through a way, 11, provided in the under side of frame A.

G represents a pinion, so arranged that its teeth engage with those onthe bar F. In the upper face of this pinion G are formed several concentric series of notches, o p q r.

H represents an L-shaped rod, inserted through one of the holes 71-, in the lower part of lever D. The end 3 of this rod is bent down, forming a pawl, which is made to engage with the notches of either series, 0 p q 'r, in the face ,of pinion G.

Iis the inclined table, on which the saw rests while the teeth of the same are being setby the die. This table forms a continuation of the bed 0, and it is adjustable in avertical plane by means of the set or thumbscrew t, which passes vertically through the forward extension at of the base of frame A, and presses against the under side of said table. A similar screw, 2:, passes downward through the front portion of arm I), and serves to prevent the said blade from rising bodily when the die B descends upon the teeth.

A series of perforations may be made in the arm b and the extension u, in order to allow the set-screws to be in position relative to the width of the saw.

On the bar F are arranged two clamps, J, one or both of which may be made adjustable, as shown in red lines, fig. 2, to accommodate saws of different lengths. A side View of one of these clamps detached is shown in fig. 3. Each clam i consists of two jaws, to w, the upper one, 10, ofwhic is adjustable by means of a setscrew, c. To the lower jaw w a block, y, is pivoted. This latter is slotted at z, for the passage of har h.

The degree of set to be given tothe teeth of the saw is regulated by the platform I. The more the upper surface of said platform inclines downward fiom the point x, the greater will be the angle of those teeth which are set downwards.

In some saws the teeth are larger than in others, and the spaces between the teeth may be longer or shorter in one saw than in another. It is to adapt my device to saws having different-sized teeth and intervening spaces, that several concentric series of notches, instead of a single series, are formed in the face of the pinion G. To explain: When the pawl is engaged with the notches composing the outer series, it follows that each time the said pawl is actuated, the pinion G is rotated less than if the engagement were with the innerseries r. For this reasonthe pinion must be rotated more or less at eachmotion of the lever D, according as the teeth or the intervening spaces of the saw being set are larger or smaller. It is to enlarge still further the scope pf application of my machine that I'make the rod H adjustable, by providing a series of holes, h, in the lever D. For instance, should the rod be inserted through one of the upper holes, the movement of the pawl 3 would be limited, and this effect would be imparted to the pinion G.

The operation is as follows: The table I having been properly'adjusted, the saw-blade is placed across the same, and secured at or near each end between the jaws of the sliding clamps J. The screw '0 is now turned until its lower end presses lightly on the saw-blade. The rod H may be now adjusted, if necessary. Now, supposing the die to be raised, the lever-D is moved forward, thereby causing the descent of the die and actuating the bar F through the medium of the pinion G and pawl s, H. In this way the alternate teeth of the saw are set downwards. The saw-blade may then be turned end for end, and again passed under the die for the setting of the remaining teeth.

The rear end of the inclined table I is formed with lateral lips, 'w., which catch behind projections as rising from the front part of the frame A.

The front end of the bed-plate Gbears against the said lips w", and forms a bearing uponwhich the inclined table swings or hinges.

Keys y'are interposed between the rear end of the bed-plate G and a proper part of the frame-work, so as to hold the bed-plate and inclined table in place, as well as to allow their withdrawal when necessary.

The inclined table I is unnecessary in setting the teeth of small saws having the ordinary backs, from the fact that the backs do not allow the blade to rest flat upon the table. In this case the saw-blade is laid directly upon the lower set-screw.

The parts of my device may be differently arranged and constructed to produce the result as hereinbefore described.

Constructed as above described, my saw-set constitutes a simple and durable machine, comparatively inexpensive, capable of wide application, and which will perform its work regularly and effectively.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, .is

l. The pinion G, provided with concentric series of notches in its upper face, when arranged, as described,

with relation to the toothed bar F, and operated simultaneously with the die, by means of the adjustable pawl H applied to lever D, substantially as herein set forth, for the purpose of feeding the saw along automatically, and with a regular graduated motion.

2. The arrangement ofthe frame A, die B, lever D, adjustable pawl H, pinion G, and toothed bar F,substantially as herein shown and described.

3. The adjustable-sliding clamps J, consisting of jaws, mac and the hinged slotted block 3 arranged as described.

To the above specification of-my improvement in saw-sets, I have signed my name, this 14th day of September, 1868.

It. W. TYLER. Witnesses:

J ACOB F. HENRY, PHIL. F. LARNER.

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