US188756A

US188756A - Improvement in gaging and centering tools

Info

Publication number: US188756A
Authority: US
Publication date: 1877-03-27
Anticipated expiration: 1894-03-27

Description

2 Sheets-Sheet 1.

F. A. RICH.

meme AND cmrmmm TOOLS. No. 188,756. Patented March 27,1877.

2 Sheets-*Sheet 2. F. A. RICH.

GAGIN'G AND CENTERING TOOLS. No. 188,756. Patented March 27,1877.

Wi'fneJsaJ/ N PEI'ERS. PflOTD-LITHOGRAPHER, WASHINGTON. D C,

UNITED STATES PATENT OFFICE FRANCIS A. RICH, OF, GRAND RAPIDS, MICHIGAN, ASSIGNOR OF ONE- THIRD OF HIS RIGHT TO JOHN H. JONES, OF SAME PLACE.

IMPROVEMENT IN GAGING AND CENTERING TOOLS.

Specification forming part of Letters Patent No. 188,756, dated March 27, 1877; application filed February 23, 1876.

To all whom it may concern Be it known that I, FRANCIS A. Bron, of the city of Grand Rapids, county of Kent and State of Michigam-have invented a Centering Compass and Gage, of which the following is a specification:

My invention relates to an improvement in centering compasses and gages; and it consists in the arrangement and combination of clamps, scribers, stutt-bolts, and thumb-nuts that will be more fully described hereinafter, whereby a cheap, simple, and effective instrument is produced for centering, leveling, boring, turning, and drilling all kinds of machinery.

Figures 1, 3, 4, 7, 8, 9 show my device as applied to different kinds of work. Figs. 2, 5, 6 are detail views of the same.

Letters D and F represent two clamps, which are secured together by the screws or and thumb-nuts c, the part D being thinnest, and having a recess, d, in one end for convenience of opening, as shown in Fig. 2. In the center of the inner sides of these clamps is made a groove, J, for the reception of a flat bar, a rod, or bolt, to which the clamps are to be fastened. To the part Fis swiveled a pin, B, which has a hole through it at an angle of about twenty degrees to receive a scriber, A, which is held in any desired position by the thumb-screw e.

The pin B is held in any desired position by means of a set-screw, 9, after it has once been adjusted for the scriber. Passing over the two screws a are the two slotted rightangular plates, :10, which are used in gaging,

as shown in Fig. 7, and may be used either upon straight or curved surfaces, the rod 0 having a marker, C, projecting out from its side for this purpose.

The hole through the pin B is made at an angle of about twenty degrees, so that the scriber can be set for small or large circles, as shown in Figs. 3, 8, and 9.

In Fig.3 my device is shown attached to a rod, L, which is held in a lathe, with the scriber A, in position for centering on the face-plate G. In Fig. 7 the gage is shown adjusted for drawing an inside circle; but outside circles may be made just as well by reversing the parts. In Fig. 8 the gage is shown attached to a drill, S, which is fastened in the spindle H. The scriber A is set for leveling the piece P on the table M, and can be used as well with a ratchet as a press-drill. In Fig. 9 the cone R is shown attached to the sharp end of the rod 0, and the scriber set to an outside angle to draw a circle on the piece T. The bottom plate I is adjusted to form a surface-gage to the rod 0. To the part D is secured a stationary scriber, K, which, with the movable scriber A, forms a compass.

Having thus described my invention, I claim- The combination ofthe clamps, D F, screws a, nuts 0, head or pin B, scriber A, set-screw g and a, round or flat bar 0, substantially as shown and described.

FRANCIS A. RICH.

Witnesses:

J. H. JONES, M. B. COOPER.