US850480A - Mortising-gage. - Google Patents

Description

PATENTBD APR.16, 1907.

11.1). JERNIGAN.

MORTISING GAGE.- APPLIOA?.IOZNv FILED MAR. 22, 1906.

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APPLIGATION-PILED MAB. 22, 1906.

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HARRY D. JEENIGAN, oE oRLiNDA, TENNESSEE. l,

IVIORTISING-GAGE.

Specification of Letters Patent.

Patented April 16, 1907.

Application led March 22,1906. Serial No. 307,542.

To all whom t may concern:

Bekit known that l, HARRY D. JERNIGAN, a citizen of the United States, residing at Orlinda, in the county of Robertson and State of Tennessee, have invented certain newand useful Improvements in Depth-Gages ,for Saws, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in mortising gages adapted for use in connection with sawsh that is, a device of this character having a pair of elongated jaws which are clamped upon the blade of the saw and are also movable upon the said blade with relation to the graduations marked thereon to gage the depth of the mortise desired.

Most essentially the invention resides in the provision of a device of this character which is comparatively very simple and elTicient in the detail of construction and durable in practice.

This invention comprises, further, objects and combinations of elements which will be hereinafter more fully described, and shown in the accompanying drawings, and the novel features thereof will be pointed out by the apas to operate the screw or shaft convenpended claim.

To obtain a full and correct understanding of the details of construction and combinations of features, elements, and advantages, reference is to be had to the hereinafter-setforth description and the accompanying drawings in connection therewith, wherein` Figure 1 is a perspectiveview of a saw with the invention attached thereto. Fig. 2 is an enlarged perspective view of the, device detached. Fig. 3 is a detail sectional view, and Fig. 4 is a detail perspective of oneof the members of the device. Fig. 5 is a modified form. i

Making renewed reference to-the accoman `nff drawin s wherein similar reference charactersindicate the corresponding parts in the several illustrations by iigures, 1 designates the device asa whole, which comprises two members 2 and 3. The member 3 consists of two vertically-disposed parallel portions 4 and 5, one of which being shorter than the other and also joined together at their upper ends, as at 6,.the portion 5 being provided ati-'its lower end thereof, as atlj7,

with an elongated jaw 8, which is disposed upon a plane at right angles to the plane of the said portion 5.

The portion 4, at its lower end thereof, is provided with lateral projecting ears Y 9, which are apertured to receive the bolt 10, upon which the member 2 is pivotally mounted, which member is of the same length as the portion 5 of the member 3 and is provided at its lower end with an elongated jaw 11, which is disposed parallel with the jaw 8 and is also adapted to cooperate with said jaw 8, so as to clamp the saw between them, as shown.

Disposed between the upper portion of the member 2 and the portion 4 of the member 3 is a leaf-spring 12, which has a tendency to continually press the upper portion of the member 2 outward, as will be understood from the drawings in connection with the description.

Tooperate the jaws of the device toward and from the opposite faces of the'saw, a threaded shaft or screw 13 is provided, one end of which is swiveled, as at 14, to the portion 4 of the member 3, and the other end thereof is provided with a handpiece 15, so

iently.

Mounted to reciprocate upon the screw 13 as it is rotated is a cross-head 16, which is movable vertically within a guideway 17 formed in a slot 18 in the upper portion of the member 2,' butin Fig. 5 the cross-head 16 and the guideway 17 is obviated, and in lieu thereof the edges of the slot 18 are V-shaped in cross-section, as at 19, so as to be received by the threads of the screw 13, as will be understood from a rthorough examination of the drawings in connection with the description.

From the foregoing the essential features and elements and the operation of the device, together with the simplicity thereof, will be clearly observed, and when manufactured in accordance with the invention an inexpensive market will be easily obtained therefor.

Having thus fully described the invention, what is claimed` as new and useful by the protection of Letters Patent is A depth-gage for saws, comprising a pair of vertically-disposed parallel members each ICO ymember7 a Leaf-spring interposed between having an elongated' jaw at its lower end i thereof, one of said members being pivotaily connected to the other member; the other member comprising two Vertical parallel. portions7 one of said portions having ears to receive the pivot of the piVotall'y-Inounted said portion and said pivotaHy-mounted member, and a 'Screw to operate with said pivotally-mounted member.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

v HARRY D. JERNIGAN. Witnesses: y

A. L. DORSEY, J. A. GREEN.

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