US1018974A - Saw-set. - Google Patents

Description

J. H. JENNINGS.

SAW SET.

APPLICATION FILED PEBJ, 1911.

. ,O18;974, Patented Feb. 27', 1912.

I n v i 1r WlTNE88E8 7 I INVENTOR I r fi/mlfiwzyv ,2 ATTORNEYS JOHN HENRY JENNINGS, 0F MERRILL, WISCONSIN.

SAW-SET.

Application filed 'February 7, 1911.

Specification of Letters Patent.

Patented Feb. 27, 1912.

Serial No. 607,055.

To all whom it may concern:

Be it known that I, J OHN H. JENNINGS, a citizen-of the United States, and a resident of Merrill, in the county of Lincoln and State of Wisconsin, have invented a new and Improved Saw-Set, of which the following is a full, clear, and exact description.

This invention relates to a new and improved tool for setting the teeth of a saw, to obtain the desired clearance.

An object of this invention is to provide a saw set which will be simple in construction, inexpensive to manufacture, strong, durable, readily adjusted, easily manipulated, and which will perform perfect work on both wide and narrow saws.

A further object of this invention is to provide a saw set which will offset the teeth in the thin place of the saw more than in the thick place, so that the points of the teeth will be in alineinent no mattter how much the saw varies in thickness.

These and further objects, together with the construction and combination of parts, will be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views, and in Which Figure 1 is a vertical section on the line 1-1 of Fig. 2; Fig. 2 is a top plan view; and Fig. 3 is a vertical section on the line 33 of Fig. 1.

Referring more particularly to the separate parts of the invention as embodied in the form shown in the drawings, 1 indicates the frame of the saw set, which is provided at one side with an extending handle 2, and at the other side with a pair of goosenecks 3, which are spaced apartfrom the body of the frame, and are provided on the ends facing the frame with an anvil 4.

Slidingly mounted in the frame 1 in opposition to the anvil 4, there is provided a plunger 5, which is adapted to hold a saw, indicated at 6, between its end and the anvil 4. Also slidingly mounted in the frame 1, in parallel relation with respect to the plunger 5, there is provided a setting punch or plunger 7, which is adapted to offset the teeth of the saw 6 placed on the anvil 4. The setting plunger 7 is normally kept out of the inclosure provided by the goosenecks 3, by means of a spring 8, which is located in a cavity 9 formed in the frame 1, and engages a pin 10* provided on the plunger 7. The spring also passes through a recess 10 formed in the clamping plunger 5, and by its resiliency, also simultaneously moves the plunger 5 automatically back to its rearmost position.

For the purpose of manipulating the plungers 5 and 7, there is provided a bell-cranklever 11, which is formed like a handle at its outer end, so as to cotiperate with the handle 2, and form an easy grip for the operators hand, and which is also provided with. a short arm 12, at its inner end beyond its pivot 13, whereby it may operate the plungers 5 and 7. It will be noted that, inasmuch as the plunger 7 is located at a greater dis tance from the pivot 13 than the plunger, 5, it will travel a greater distance than the plunger 5 during the same movement of the lever 11, so that, while the plunger 5 is being moved to engage the saw 6, the plunger 7 will be moved still further to oifset the teeth of the saw, as indicated in the dotted lines in Fig. 1. The degree of offsetproduced by the plunger 7 may be regulated by a screw 14, which is provided in the arm 12, and engages the end of the plunger 7.

For the purpose of holding the saw in proper juxtaposition to the setting plunger 7, there may be provided a guide 15, which, while it may be of any suitable form, is preferably fixedly secured at one end, as at 16, to the frame, and adjustably secured in any suitable manner adjacent its other end, as

by means of a set screw 17. Inasmuch as this guide is of springy material, it can be adjusted by means of'the set screw 17, to adjust the position of the teeth of the saw relative to the plunger 7. In order to permit the plunger to work in the guide, it is bifurcated that is to say, provided with a slot 18, through which the plunger 7 may reciprocate. It will be further noted that this guide comprises a main body portion and a leg 19 extending at substantially rightangles to the body portion, between the goosenecks 3 and the brackets 20 formed on opposite sides of the slot 18 and extending at substantially right-angles-to the leg 19, and out through openings provided in each side and inclosed by the goosenecks 13.

The utility of the device will be readily understood when taken in connection with the above description. The saw, represented at 6, is set in the position indicated in Fig. 1, and the handle of the lever 11 brought toward the handle 2 into the position shown in the dotted lines in Fig. 1. By this movement, the plunger 5 will be brought into positive engagement with the body of the saw, so as to prevent movement of the latter, and at the same time, the setting plunger 7 will be forced inwardly a suflicient distance to offset the tooth of the saw in opposition thereto, as indicated in the dotted lines in Fig. 1. The amount of this offset can be regulated by means of the screw 14:, and the position of the saw 6, in the saw set can be regulated by regulating the position of the guide 15. It will be noted that the plunger 5, on reaching the limit of its motion, by engaging the saw 6, also prevents the further motion of the setting plunger 7 by limiting the further movement of the lever 11. This, therefore, defines the amount of ofiset produced by the setting plunger 7 It will there fore be seen that if the saw 6 is thin at a par ticular point, the setting plunger 7 will be permitted to move a greater distance than if the saw were thick at this point, so that the teeth at the thin points will be offset a greater amount than at the thick points, so that the points of the teeth will be in alincment, no matter how the thickness of the saw may vary at diiferent points. It will be seen that this is done to a certain extent by having both of the plungers operated by a single lever, so that the movement of the plunger 5 controls the movement of the setting plunger.

While I have shown one embodiment of my invention, I do not wish to be limited to the specific details thereof, but desire to be protected in various changes, alterations and modifications which may come within the scope of the appended claims.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent 1. In a saw set, the combination with a frame, of a pair of goosenecks extending from said frame in spaced relation, an anvil secured to said goosenecks, a saw engaging punch slidingly mounted in opposition to said anvil, a setting punch slidingly mounted in parallel relation with said saw engaging punch, and a single lever for operating both said punch and said plunger, pivotally connected to said frame at a point located at unequal distances from the rear ends of said punch and plunger, and having a portion at one side of said pivot bearing directly against the punch and plunger.

2. In a saw set, the combination with a. frame, of a pair of punches mounted in said frame and movable in the same longitudinal direction side by side, one of said punches being a setting punch and the other of said punches being a saw engaging punch, and a bell crank lever pivotally mounted on said frame and having one arm thereof operatively engageable with'the back ends, of both of said punches, said punches being located at different distances from the pivotal point of said bell crank lever, said saw engaging punch being adapted to engage the saw to be set, and, by the limiting of its movement when in engagement with said saw, obstruct the further movement of said arm of said bell crank lever so that said arm will be prevented from further actuating said setting punch, whereby the extent of movement of said setting punch will be controlled by said saw engaging punch.

3. In a saw set, the combination with a frame, of a pair of punches mounted in said frame and movable in the same longitudinal direction side by side, one of said punches being a setting punch and the other of said punches being a saw engaging punch, a bell crank lever pivotally mounted on said frame and having one arm thereof operatively engageable with the back ends of both of said punches,said punches being located at dif ferent distances from the pivotal point of said bell crank lever, said saw engaging punch being adapted to engage the saw to be set, and by the limiting of its movement when in engagement with saidsaw, obstruct the further movement of said arm of said bell crank lever so that said arm will be prevented from further actuating said setting punch, whereby the extent of movement of said setting punch will be controlled by said saw engaging punch, and a set'screw of said arm projecting beyond the face thereof which contacts with said saw 'engaging vpunch, said set screw being adjust able so as to vary the point at which said saw engaging punch stops the movement of said setting punch. V

4. In a saw set, the combination with a frame, of an anvil on said frame, a setting punch movably mounted in said frame, a saw engaging punch movably mounted in juxtaposition to said setting punch, said saw engaging punch being adapted to cooperate with said anvil to clamp a saw therebetween, a lever for manipulating said punches, one of said punches being provided with a recess, and a single spring encircling one of said punches and engaging in the recess of the other of said punches, whereby it is adapted to return said punches after actuation by said lever. V

5. Ina'saw set, the combination with a frame, of a pair of goosenecks extending from one end of said frame in spaced relation from each other so'as to form a slot, and having their ends in spaced relation from the body of the frame, an anvil secured to their ends in spaced relation from said frame, a setting and saw engaging punch slidingly mounted in said frame and adapt- 1 form a slot into which said last-mentioned punch is adapted to extend.

6. In a saw set, the combination with a frame, of a pair of goosenecks extending from one end of said frame in spaced relation from each other so as to form a slot, and having their ends in spaced relation from the body of the frame, an anvil secured to their ends in spaced relation from said frame, a setting and saw engaging punch slidingly mounted in said frame and adapted to project into said slot between said goosenecks, a guide for one of said punches,

comprising an angular spring-metal member secured at one end to said frame and having its free end bifurcated to form a slot into which said last-mentioned punch is adapted to extend, and a screw secured to said guide and adjustably mounted in said frame, so as to vary the free slotted end of said guide relative to said frame.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN HENRY JENNINGS.

Witnesses:

H. B. RICHMOND, J osEPn DOWNIE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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