US66484A - John m - Google Patents

Description

@uitrit tates stcnt @Ittre JOHN M. GEER, OF HOLDEN, ASSIGNOR TO DODGEAND WELLINGTON, OF WORCESTER, MASSACHUSETTS.

Letters Patent No. 66,484, dated July 9, 1867.

IMPROVEMENT IN SAW-SETS.

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KNOW 'ALL MEN BY THESE PRESENTS:

That I, JOHN M. GEBR, of Holden, in the county of-Worcester, andA Commonwealth of Massachusetts, have invented certain new and useful improvements in Hand Sa'w-Sets, of which the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specitieation, in whichv Figure 1 represents a perspective view of my improved hand-saw set, and

Figure 2 represents a longitudinal central section ofthe device, a section of a saw being shown in position ready to be acted upon by the headof the setting lever. t l v The proper 4setting of saws, as the setshave heretofore been constructed, has been attended with considerable inconvenience; so much so that it has not been the practice 'of the great majority of 'persons who have occasion to use a simple hand or wood-saw to keep a set. Again, there has been a call by carpenters, and others who have occasion to use a saw quite often, for some device to set saws without the use of the hammer, and

which at the `same time should possess such capacity for adjustment as to be well adapted for a`wide range of use, er to the setting of saws of dili'erent lengths of teeth. By my improvementsa saw-set isproduced which fully meets the wants above enumerated. I

To enable thoseskilled in the art to which my invention belongs to make and use the same, I will'proceed to describe it more in detail.

In the drawings the partmarked is the main supporting lever, the head B of which is cored or recessed l out to receive the head C ot' the setting-lever D, which is hinged by a pin, a, between the sides I2 l of the head B, as fully shown in the drawings. Fro'ui the lower 'part of head B projects the jaw E, having a saw-supporting thumb-screw, c, in its end, while an arm, F, projects forward from one side et' the upper part of the head, and also has a thumb or other screw, d', for holding the saw-plate down in place. G is the setting-block, made in this instance of steel, and fitted into a dove-tail groove in the jaw E. The outer corners e c may be bevelled off, as shown in the drawings, if preferred, to avoid the 'possibility of the screw-teeth catching upon the edges of said block. The part f under the nose g of the head C is made fiat, and iuelines back, as fully shown in the drawings. H is a slotted gauge, fastened to the under side of the jaw E by a set-screw, h, which passes through its slot, so that the gauge can be moved back and forth, as may be desired, to adjust its upright stops m m to admit of a longer or shorter tooth. The levers A and D are forced apart by a dat spring, I, but any other proper spring device may be employed for the same purpose.

The operation is as follows: Screw c is turned to bring its point to the right position to support the saw, and then screw d is turned .down until there is only space between their points to allow the saw-plate to be slipped4 through easily. Gauge H is new moved to bring its stops m m to the right positions, when the saw .I is placed between the points of the screwsc and d, as indicated in fig. 2, thereby bringing one of the teeth directly under the nose g ofthe head C, when the rear end of lever D is operated by the hand, and nose g is forced down upon the tooth, which is set down upon the block G. The screw-plate is now slipped along to bring the next tooth which it is desired to set into position, when that is set in the same'way, and so on until one side has been set, when the saw is turned over and the other side is set in the same manner. It will be understood that the lower down the point of screw c is, the greater will be the set. The setting-block G may be east with the jaw E, andtlien case-hardened, if preferred. y l

My set is so simple that it can be used by any one who is capable of using a saw. It can be used for setting circular and mill-saws without their removal. It is not liable to get out of order, and with proper usage will last a man his lifetime. The screws c and d are set alittle to one side of each other, as shown in the drawings,

.whereby the operator is enabled to slide the set along over the saw very easily, and in a proper` position to act upon the teeth, by simply keeping the set turned so that the screw e will be in contact with. the under side of the saw-plate, and the screw d in contact with the upper side of the plate. Again, by the peculiar construction ofthe head B, as shown in the drawings, the head C can be hinged so that it will turn upon a centre above the plane upon which the teeth are set, thus preventing any tendency of the teeth to cramp during the oper ation of setting. And, morepver, the peculiar construction of the head B is such that the arm Fis supported in a firm and secure manner in a lateral position, that is, to theA right of the jaw E, as shown, whereby the head C is left exposed to the view of the operator, which enables him to sel; the teeth with more convenience and accuracy than he could if the arm F projected out over the heed C.

Having described my improved saw-set, what I claim therein as new and of myinveution, and desire to secure by Letters Patent, isy The head B, constructed in the manner described, for supporting the head C, with the extending jaWE and laterally projecting arm F, substantially in the manner set forth. i

JOHN M.' GEBR. Witnesses:

Tnos. H. DODGE, D. L. MILLER.

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