US379117A - Marking-gage - Google Patents

Description

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E'. W. LYGETT.

MARKING GAGE.

N. 379,117. Patented Mar. 6, 1888',

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UNITED STATES PATENT OFFICE.

FREDERICK W. LYCETT, OEAHARTFORD, ASSIGNOR TO THE STANLEY RULE AND LEVEL COMPANY, OF NEW BRITAIN, CONNECTICUT.

MARKING-GAGE.

SPECIFICATION forming part of-Letters Patent No. 379.117, dated March 6, 1888.

Application tiled November 13` 1885. Serial No. 152,664. (No model.)

To all whom t may col/merit:

Be it known that I, FREDERICK W. LYCETT, acitizen of the United States, residing at Hart ford, in the county of Hartford and.State of Connecticut, have invented certain new and useful Improvements in Marking- Gages, of which the following is a specification.

My invention relates to improvements in marking-gages; and the object of my improve- [C ment is to facilitate gaging from curved or other irregular faces.

In the accompanying drawings, Figure lis a plan view of my gage. Fig. 2 is a side elevation. Fig. is a reverse plan view, and Fig.

I5 4 is aperspective view with a part of thegage bar broken away.

The general form ofthe gage is of ordinary construction; and it consists of the'gage bar A, having the marking pin or spur a, and the 2o gage-block B, adjustable horizontally on the gage bar and held in is adjusted position by means of the set-screw b, all substantiai ly as in' prior gages. As shown, the end of the setscrew bears against the shoe 0 in order to prevent marring the gage-bar.

Instead of providing the gage-block with a plain face for bearing against the surface to gage from, I provide this part of the block with two rounded projections, d, the sides of which constitute the bearing-surface of the gage-block. For convenience I have shown these projections in the form of pins; but it will be observed that only one side of each pin performs any function' in marking-that is,the

sides which are nearest the marking-spur a.,

These projections form two points at equal distances from the gage-bar, whereby the block is adapted to tit against a convex edge, as indicated by the brok-en linef, Fig. 3, or against 4o a concave edge, as indicated by the broken line g.

The marking-spur is set inthe middle of the bar measuring transversely, so as to be in line With a point between the projections d at equal distances from the bearingsurfaces of said projections, and consequently said proj eetions are equidist-ant from vsaid spur. Vhen the gage is used to Work against aconvex or concave edge or other curved surface-as, for in stance, an irregular or compound curve-and 5o the marking-spur kept to its work, the result is a mark that is parallel to the edge worked from.

It is evident that these two points are adapted for Working againsta straight edge, so that the gage may be used for all the ordinary purposes oi a marking-gage and in addition thereto for Working from a curved or irregular edge.

Iamaware that a prior patcntshowsacentrolinead, which consists of an ordinary drafts- 6o mans T-square having two pins in the head at equal distance from one edge of the blade'of having pins for fastening said pieces to a draw- -ingboard for use as a gaging surface for the 65 square blade by resting the pins against the edge of said pieces.

[am also aware that a prior patent for a joiners gage shows a gage-block having a convex face on one sideand a concave face on 7o the oppositesidc, either of which faces may be used separately for marking convex or concave lines. All of said prior art is hereby disclai med.

I claim as my invention- The herein-described marking-gage, consist ing of the bar A, having the marking-spur L at one end in the middle of the bar measuring trans versel y,and the gage-block B, made adjustable on said bar and having the rounded pro- 8o jections which form the bearing-surface of said block in gaging and marking, said projections being located at points equidistant from the marking-spurand transverse middle f the gage-bar, substantially as described,and 8 5 for the purpose specified.

' FREDERICK W. LYCETT.

Witnesses:

W. E. LATHAM, H. S. WALTER.

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