US1827156A - Dovetail-marker - Google Patents

Description

Oct. 13, 1931. A, O, MARTlN 1,827,156

l DOVETAIL MARKER Filed Dec. v3, 1929 Patented Oct. 13,' 1931 UNITED STATES DovE'rAILV-iviiirtxnn Appiication mea December s, 1929, serial 110.411,344janain Great isritain november 1, 1929. j

This invention, which relates to dovetailmarkers, provides va marker characterized by two members so connected together as to is constituted by a fence and a plate with ay V-opening therein, the plate being movable not only longitudinally and at right angles to the fence, butalso longitudinally and at angles other than a right angle to said fence, means being provided for locking the plate and fence together when in adjusted position.

For a ready understanding of the invention, reference is to be had to the following description and accompanying sheet of drawings illustrative of a practical embodiment of the invention, and wherein Figure l is a plan'view, the marker being set at right angles to the fence.

Figure 2 is a sectional view, 1 1 of said Figure 1.k

Figure 3 is a plan view, the marker being set obliquely to the fence.

Like numerals of reference indicate corre-v sponding parts in the several figures. f ln carrying out the inventionl and refer,- ring to the drawings,` the marker consists of an oblong plate 2, and a fence constituted by two flat bars 3 3 between which the yplate 2 is disposed, the said bars 3 3 being of greater length than the width of the plate 2, and being connected together by means of bolts 4 and wing-nuts 5.

taken on line T he plate 2, which engages and is slidable'` between the bars 3 3, is formed with a longitudinally disposed V-shaped fret or opening 6, the two long sides 7 of which are at an angle in relation to one another such as is usually used inthe taper of dovetails, said sides' 7 and the base 8 of said fret or opening 6 constituting marking or scribing edges by lmeans of which the dovetail may be.

scribed or marked on the work to be dovetailed.

When scribing or marking dovetails whose centre lines lie at right angles to the side face Y* of the work in the edge of which the dovetails are to be formed, the bars 3 3 are moved together along the plate 2 and at right angles thereto, till the required vsize of dovetail is given by the sides 7 7 of the opening or fret 6, and the edges 9 of the fence 3 3, whereupon the wing-nuts 5 are tightened up to firmly clamp the plate'2 between the bars 3 3 of the fence.

The device is, by its fence 3, placed against the side face of ther work aforementioned, and a dovetail is scribed upon the edge of the work, and then the device is slid along the side face of the work to a required position for scribing another dovetail, and so on, thus enabling any number of dovetails to be scribed or marked off by one setting of the n device.

To scribe or mark dovetails whose centre line lies obliquely to the-side face of the work in the edge of which the dovetails are to be formed, the wing-nuts 5 of the fence 3 3 are slackened, and the fence 3 3 is moved over the plate 2 to the position or angle required, Y and also longitudinally along the plate 2 until the space between the edges 7 7 adjacent to 7 in crossed angular relation to said scribing edges. f y Y l 2. A dovetail marker comprising a plate having an elongated V-shaped opening therein the side edgesof which constitute marking edges andform therebetween an acute angle corresponding to the usual angle between the sider faces of a dovetail formation,

l a fence,and means for securing the fence to the plate in different positions of adjustment along and in crossed relation to said opening. j

3. A dovetail marker comprising a plate having elongated soribing edges forming between them an acute angle corresponding to the usual angle between the side faces of a dovetal formation, a fence comprising a pair of hars disposed against opposite faces of said plate, and screws connecting said bars for Clamping tliemagainst saidplate indifferent positions of adjustment along and in Crossed relation to said scribing edges.

In testimony whereof? I?. have alxed Inyfy signature here-to this ninth day of November,

n ALFRED OWEN MARTIN.

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