US352276A - Level - Google Patents

Description

(No Model.)

' W. R. ST. CLAIR.

LEVEL, PLUMB, AND ANGLE GAGE.

N0. 352,276. iggz' PatentgdNov. 9, 1886.

avwemtoz I a Ho'zMm S v! IJIJII IIITTT wi tmeooao N. PETERS. Pholo-Ulhognpllen Washington, a. c.

UNITED STATES ATENT OFFICE.

WILLIAM RICHARD sr. CLAIR, onMoKENzIE, TENNESSEE.

LEVEL, PLUMB, AND ANGLE-GAGE.

SPECIFICATION forming part of Letters Patent No. 352,276, dated November 9,1886.

Application tiled'June a, 1886. Serial No. 204,071. No model.) I

To aZZ whom it may concern:

Be it known that I, WILLIAu RICHARD ST. CLAIR, a citizen of the United States, residing at McKenzie, in the county of Carroll and State of Tennessee, have invented a new and useful Improvement in Level, Plumb, and Angle Gages, of which the following is a specification.

This invention is an improvedlevel, plumb, and angle-gage; and it consists in the peculiar construction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the drawings, Figure 1 is an elevation of a combined 1evel,plumb,and angle-gage embodying myim provements. Fig. 2 is a top plan view of the same. Fig. 3 is a vertical section taken on the linear or of Fig.2, Fig. 4 is asimilar view taken on the line yyof Fig. 2. Fig. 5 is an elevation of the apparatus,looking on the reverse side from that shown in Fig. 1, and

' standing in a vertical position.

A representsa suitable frame or case,which,

is provided with a top, B, and sides 0, made of glass or other transparent material. In the center of the case or frame is a vertical standard, D, having at its upper end a horizontal rearwardly-extending arm or plate,E A similar plate, F, is at the lower side of the stand.- ard, immediately under the plate E. On the front side of the standard D, and at a suitable distance therefrom, is a vertical standard, G.

H represents a horizontal shaft, the ends'of which are journaled in the standards G and D, the said shaft being located transversely in the center of the case or frame. From the lower side of the shaft I-I depends a vertical red, I, and from the lower end of the said rod extends a semicircular curved rod, K, the arms of which extend in opposite directions from the rod I, and are provided with screwthreads. On the threaded armsK are secured weights L, which by reason of the screwthreads on the said arms may be so adjusted as to cause the shaft I to be always maintained in an absolutely vertical position. To the front end of the shaft H is attached an indexhand, M, which wings around .a graduated dial, N. The said dial is provided with two concentric circles drawn from the center of the shaft A, and graduated and numbered to indicate the degrees, as shown in Fig. 1.

P represents a vertical shaft, which is journaled between the plates E and F, and to the upper end of the said shaft is attached a counterbalanced pointer or hand, R, the outer end of which sweeps over the horizontal dial S, that is attached to one end of the case or frame. In the centerofthesaid dialisindicatedapoint, S, at which the hand R stops when the frame or case is in a perfectly horizontal position, and from either side of the said point S are described segments divided into degrees and fractions of degrees as far as the width of the case or frame will permit. One side of the face of the dial S, on the right-hand side of the point S, is marked High, and the other side of the said dial is marked Low. From the lower end of the vertical shaft P extends a horizontal arm, T, the outer end of which is provided with a slot.

U represents a pendulum-rod, the upper end of which is pivoted in opposite sides of an opening made in the plate E, and the lower end of which passes through the slot t, and is thereby connected to the armT. Near the lower end of the pendulum-rod is aweight, u, and from opposite sides of the said rod extend the curved arms of a rod, u, the said arms being screw-threaded and provided with adj ustable weights of, similar to the arms K and the weights L of the shaft H. By adjusting the weights a the pointer R will be caused to stop at the point S of the scale S,when the case or frame is exactly level, as hereinbefore described. By thus providing the case or frame with the dialsh and S, arranged at right angles to each other, and the weighted indexhands M and R, adapted to swing over the said dials, it will be readily understood that the angle at which the case or frame is supported will be indicated with exact certainty, one of the hands serving to correct any inexactness of the other.

V represents a long pendulum-rod, one end of which is pivoted in the case or frame under the dial S. The said rod extends through the said frame or case, and its lower end is provided with a pointer, V,which swingsover a graduated card, WV. Across the lower end of Ice the pendulum-rod V extends a transverse horizontal rod, X, the arms of which are screwthreaded andprovided with adjustable weights Y, by means of which the pendulum will be caused to stop at the point Z of the card W, when the ease or frame A is maintained in a perfectly vertical position, thus serving the purpose of a plumb.

5 Having thus described my invention, I

claim-' .1. The case having the dials N and S, arranged at right angles to each other, the weighted index-hands M and R, adapted to :0 swing over the said dials, the pendulum-rod V, pivoted at one end of the case and having the' pointer V, and the graduated card or scale Zat the opposite end of the case, over which the pointer V swings, substantially as 15 described.

2. The combination, in a level, of the shaft 1?, having the arm T and the index-hand R, with the weighted pendulum-rod U, engaging with the arm T, for the purpose set forth, substantially as described. 20

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

WILLIAM RICHARD ST. CLAIR.

\Vitnesses:

WV. 0. MoLnAN, E. I. HANDLE.

Images