US842092A - Compass-light. - Google Patents

Description

PATENTED JAN. 22, 1907. A. G. GLOVBR & W. E. HADLOCK.

COMPASS LIGHT.

APPLIOATION FILED MAY 28, 1906.

UNITED FATENT OFFICE.

ARTHUR C. GLOVER, OF IPSWICH, AND WILLIAM E. HADLOCK. OF WENHAM, MASSACHUSETTS.

COMPASS-LIGHT.

Specification of Letters Patent.

Patented J an. 22, 1907.

Application filed May 28. 1906. Serial No. 319,163.

- tion, withthe compass, of any kind oi an electric light contained in an inclosing case mounted on the compass-irame and provided with a shutter so arranged as to direct the rays of light to any desired point of the compass and at the same time to shut. ofl the light entirely, if desired.

The invention is shown as applied to a ships compass of the usual type mounted on gimbals, the entire arrangement forming what is known as a biunacle.

Figure 1 is a front elevation of a compasslight embodying the invention, and Fig. 2 is a transverse vertical section on the line 00 of Fig. 1.

As herein shown, the compass A is mounted in the gimbal-frame A at the top of a casing A Secured to the upper portion of the compass A is an inclosing case a, which contains an electric lamp 1), which is ca able of giving suflicient light to easily read t 1e compass at a given point.

The casing a is provided with a supporting member if, shown as secured by means of one or more screws (1- to the outer edge of the compass A, the said casing bemg of opaque 'material and entirely inclosed, except for an o ening a near the wer part of the casing, t e said opening being over the compassdial. This opening is of suflicient width to shed light over a considerable portion of the dial, but is combinedwith a shutter a provided witha smaller opening 0,, whereby a smaller area of light can be directed. to various points of the dial. In the construction shown the shutter a copsists of a sleeve provided with a handle-a, havin' a guide projection a which travels in a s ot a, formed in the wall 'of the casing, so that by rotating the said sleeve the position of the opening a will be varied, so as to throw the light from the middle toward the edge of thedial, and vice versa. The travel of the sleeve is sulficient, as indicated in dotted lines, Fig. 2-, to carr 1 the opening a entirely beyond the edge of t 1e opening a, so as to shut off the light completely, if desired.

By the construction described it will be seen that a substantially steady light can be maintained at a certain point on the compass-dial regardless of the position of said I dial with relation to the fixed frame in which the compass is supported, the said light being directed to and centered upon that part of the dial which is to be observed Without illuminating other. )arts of the dial, the casing constituting a shade for the eyes of the observer, so that the compass may be very easily read.

We claim--- 1. The combination with the compass mounted. on gimbals; of a casing supported upon the said compass; an electric lamp 1nclosed in said casing; and an opening through the wall of said casing to permit the li ht to fall upon the compass-dial, substantially as described.

2-. The combination with a compass; of an opaque casing mounted on the compass a ove the dial; an electriclamp contained in said casing; an opening through the wall of said casingadjacent to the compass-dial; a shutter provided witha smaller registering opening and movable with relation to the main opening in the casing, substantially as and for the purpose described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

ARTHUR O. GLOVER. WILLIAM E. HADLOCK.

Witnesses:

- M. E. CovENEY,

H. J. L/IVERMORE.

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