US361532A

US361532A - Miter-bevel

Info

Publication number: US361532A
Authority: US
Publication date: 1887-04-19
Anticipated expiration: 1904-04-19

Description

(No Model.)

L. H. LEWIS.

MITER BEVEL.

No. 361,532. Patented Apr. 19, 1887.

WI TJV ESSES I N VEN TOR .dt'torney I UNITED STATES PATENT Orricn.

LUMAN H. LEWIS, OF SAN JOSE, CALIFORNIA.

MlTER-BEVEL.

SPECIFICATION forming part of Letters Patent No. 361,532, dated April 19, 1887.

" Application filed November 27, 1886. Serial No. 220,034. (No model.)

' in which- Figure l is a top view showing my improved miter-bevel applied in one position for marking a piece of timber. Fig. 2 is a similar view, showing the bevel in a different relation to the piece of lumber. Fig. 3 shows the bevel used as a right angle. Fig. 4 is a side view, partly broken, of the bevel. Fig. 5 is a detail of the gage-plate.

This invention relates to improvements in what are called in carpentry mitergages, such as are used to quickly and readily score or mark timber at any desired angle to be cut thereon and in they making of polygonal frames.

One of the main features of the invention is the extension of the edge or blade, by means of which the marking is done 011 both sides of the bar or leg to which said edge or blade is p T'votedso that the marking can be done from either arm of said blade or on each side of its pivotal point.

This invention further consists in certain details of construction and arrangement hereinafter described, and pointedout in the appended claims.

Referring to the accompanying drawings, A designates the stock of the device,rectangular in cross-section, and split or bifurcated, as at a", for nearly its entire length, the said bifurcation being horizontal. The sides of the stock A are straight and parallel to each other, and its end a, from which the bifurcation runs, is rounded and has the blade B pivoted to it, the said blade entering the bifurcation and the pivot-screw b being at about its center.

I) is a thumbnut on the extended end of said screw, to retain the parts of the device together at any desired angle.

0 is asegmental plate formed on the inner edge of the blade B, and entering the bifurcation of the bar A. The said segmental plate has a straight edge, 0, inclined at an angle of forty-five degrees to the marking-edge of the blade, and the inner edge of the blade is notched or cut away at c, the point of junction of the edge e and the inner edge of the blade, so that the edges 0 will be extended to the side of the stock A, and can be set at varying angles thereto, as shown. The segmental plate is scored on one side with lines marked 3, 4, 5, 6, 7, 8, 850., any of-which can be brought into exact alignment with the adjacent sides of the bar A, which sides have metallic plates secured to them, so as to afford a more perfect and straighter edge to bring the lines to than wood would give. The lines, as marked, give the various angles of polygons having a corresponding number of sides, and V,

by setting the blade B with one of its scores or lines coincident with the metallic plates of the stock,its outer continuous edge will give the proper angle for cutting the adjoining ends of blocks to form such polygons. The segmental plate is also scored with a line,D,which stands at an angle of forty-five degrees to the edge a, and when said line is brought to correspond with the side of the bar, as described, the blade will be at right angles to said bar, and the workman can score at right angles across a piece of timber on either side, the notch c permitting him to score one edge, '0, from the stock to the outer end of said edge, and he I am aware that the scored segmental plate has been used in miter-gages-such,- for instance, as is shown in patent of Thompson, granted October 12, 1858, and numbered 2l,78l-and such I do not claim, broadly; but

What I do claim is- 1. The combination, in a miter-gage, of the stock A, the scoring-blade B, pivoted near its center to said bar, as described, and the scored segmental plate 0, provided with the edge 0 at ICO anangle of forty-five degrees, with the scoring 13, having a scored segmental plate, C, proedges of blade Band the mark or line D, at vided with a straight marking-edge,the notch right angles to said edges, and the notch 0 at c',to form a continuation of said edge,and the 15 thejunctidn of edge 0 and blade B, substanblades E E, all constructed and arranged tially as specified. substantially as and for the purpose described.

2. In a miter-gage, the combination, with In testimony that I claim the foregoing as the stock A, of a scored segmental plate, 0, my own I affix my signature in presence of formed with an extension-blade on both sides two witnesses.

thereof and having the notch c, all as and for LUMAN H. LEWIS.

the purpose set forth. \Vitnesses:

3. In a mitergage, the cornbination,with the G. M. BRUCE, stock A, constructed as described, of a plate, D. G. KENT.