US691728A - Bevel. - Google Patents

Description

Patented 1an. 2|, |9021." N. B. NonFoLK.

BEVEL.

(Application med. Apr. 2. 1901.)

(nu Model.)

WWA/55555 `NTTED STATES PATENT OFFICE.

NAPOLEON B. NORFOLK, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF TWOTHIRDS TO ROBERT MARSH AND GIBSON HOWARD, OF LOS ANGELES, CALIFORNIA.

BEVEL.

SPECIFICATION forming part of Letters Patent No. 6.91,*728, dated January 21, 1902r Application filed April 2,1901' Serial No. 54,101. (No model.)

T all whom it may concern:

Beit known that LNAPOLEON B. NORFOLK, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California,haveinvented new and useful Improvementsin Bevel and Miter Finders,

' of which the following is a specification.

My invention relates to a convenient and useful tool to enable a person to readily determine the angle on which a piece of timber must be cut to it into or around a corner when finishing a room or framing a structure; and the object thereof is to provide such tool. l accomplish this object by the tool described herein and illustrated in the accompanying drawings, in which- Figure l is a perspective view of my device, showing it adapted for linding a miter-joint. Fig. 2 is a side view,partly broken away,show ing my device in its extended position.

In the drawings, A and B are the long legs of my bevel and miter iinder, which are united together at one end by pivot-joint C, preferbly open, and formed by uniting the legs by an eyelet. At the back or rear edge of these legs are pivotally connected at D and E, respectively, the bars F and G at equal distances on each side of the joint C, the center of the pivotal connections being in a straight line which is parallel with the front edge of the device when in it's extended position, as shown in Fig. 2, in which position the front edge is a straight line. The back and front edges of the legs, except at the scale and joints, are parallel. The edges of the bars are also parallel. These bars at their other end are united together by a pivot-joint H, preferably open, and are of equal length, the

length of each being such that when united together and to the legs the distance from the center of the joint C to D and from D to H and from H to E and from E to C is equal. On the lower side and at the front edge of one of the legs, preferably leg B, I provide a downwardly-projecting iiange B', preferably integral therewith and at right angles to the face of the upper surface of the leg against which the inner end of the leg A abuts when the legs are in their extended position, as shown in Fig. 2, to prevent the legs from moving beyond a straight line, which enables me to use the finder either as a straight-edge or as a measuring-rule, a scale being provided on its upper face for that purpose. The leg which is provided with theange is a'lso provided with a semicircular projection B', the base of which coincides with the line which joins the centers of joints C and E and the extension thereof, the center of the joint E being the center of the base of the projection. This projecting part is provided with a suitable semicircular scale I to indicate at what angle the leg A stands to leg B when the registering-mark G on bar G is at any particular point on such scale.

In the use ofmy device when it is desired to find what the interior angle of any corner of a room or other structure is it is placed in such corner with the legs resting against the sides of the walls forming such corner, when the angle is readily read from the semicircular scale. The correct angle being thus found, if it is desired to fit timbers into such angle legB is placed upon the timber to be sawed, with the flange thereof resting against the edge of the timber'and with the indicatingmark at the previously-found angle. Then with a pencil through the open joints C and p H central dots are made, which when united by a line gives the line on which the timber must be sawed so as to make a miter or bevel joint, as the case may be. When an eXterior angle is to be ascertained, the inner side of leg A is placed against one wall and the outer side of the bar F is placed against the other wall, and the exterior angle is read from the semicircular scale, and the line on which a timber must be cutis found the same y as with an internal angle.

I-Iaving described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A bevel and miter finder, comprising two legs pivoted together at one end; bars of equal length pivoted to each other and to the legs, respectively, at such distance from the pivot joining the legs that the distance from the center of any one pivot-joint to the center of an adjoining joint is equal to the distance between the centers of any other adjacent joints, a semicircular projecting part on one of the legs, having the center of the base of said` IOO projection coincident with the center of the joint uniting the bar to said leg and on a line with the line which connects the center of said joint, and the centerot' the joint connecting the legs.

2. A bevel and niiter finder, comprising two legs pivoted together at one end by'a joint having an opening through the center thereof, one of said legs having a semicircular pro jection on the back provided with a scale on the face and adjacent to the periphery; said leg also having, on the front edge, a downwardly-projecting fiange; a bar pivotally attached to said leg, on a line parallel with the front edge of the leg which passes through the center of the joint joining the legs at a point in the center of the base of said semicircular part and having an indicating-mark adapted to register with the semicircular scale as the bar is rotated on the pivot; a second bar pivoted to said bar and to the other leg by pivotal joints at such points that the distance between the centers of the adjacent joints are equal to the distance between the centers of any other adjacent joints, the joint uniting the two bars having an opening through the center thereof.

3. The herein-described bevel and miter finder, comprising legs A and B pivoted together at one end at O, leg B having the downwardly-projecting iiange B and the semicircular projection 13"; bar F pivoted to leg A at D and to bar G at H, and bar H pivoted to bar B at E, substantially as described herein.

In witness that I claim the foregoing I have hereunto subscribed my name this 21st day of March, 1901.

NAPOLEON B. NORFOLK.

Witnesses:

A. E. HEATING, A. BROWN.

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