US1123488A

US1123488A - Lamp.

Info

Publication number: US1123488A
Application number: US77831313A
Authority: US
Inventors: Wilton W Cogswell
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-07-10
Filing date: 1913-07-10
Publication date: 1915-01-05
Anticipated expiration: 1932-01-05

Description

W. W. GOGSWELL.

LAMP.

APPLICATION FILED JULY 10, 1913.

Lmwtw Patented Jan.5,1915.

INVEN'I'OR.

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' ATTORNEIC WILTON W. CQGSWELL, 0F KIRWIN, KANSAS.

LAME.

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Specification of Letters Patent.

Patented Jan. 5, 1915..

Application filed July 10, 1913. Serial No. 778,813.

To all whom it may concern:

-']Be it known that T, WILTON W.'Coos= WELL, a citizen of the United States, residing at Kirwin, in thecounty of Phillips and State of Kansas, have invented certain new and useful Improvements in Lamps, of

accomplish said object by providing a lamp that can be adjusted to cut ofl all direct light and project only reflected rays at such an angle as to adequately illuminate a roadway without being cast into the eyes of persons approaching from the opposite direction.

In order that the invention may be fully understood, reference will now be made to the accompanying drawing, in which:

Figure 1 is a front elevation of a lamp embodying the invention. Fig. 2 is a vertical central section on line ITH of Fig. 1.

In carrying out the invention, I employ a rectangular casing l, surmounted by a hood 2 which arches over the open upper end 3 of said casing 1. v

The illuminating means of the lamp is located within the casing 1, and in the present instance, embodies an incandescent globe-4, a filament 5, and a socket 6. The filament 5 may be connected to any suitable source of electricity, such, for instance as the batteries usually carried by an automobile.

Socket 6 extends through a vertical slot! in the front wall of the casing 1, so that the lamp 5 may be vertically adjusted in proper relation to a reflector 8. After the lamp 5 has been properly adjusted it is locked from accidental movement by two nuts 9 thread ed upon the socket 6 and adapted to frictionally-engage opposite sides of the front wall of the casing 1. The reflector 8 is adjustably-mounted in the hood 2, and is provided with a lever 10, the reduced lower end 11 of which is threaded into a boss 12 on the rear portion of said reflector. The reflector 8 is slightly dish-shaped and its upper portion 18 extends forward at an ob- -;se angle from its main body portion, for a purpose which will hereinafter appear.

Lever 10 is pivotally-mounted upon a pin 13 extending through lugs 14: on the inner side of the hood. Said lever 10 extends upwardly and outwardly through a slot 15 in the hood, and is threaded to receive a thumb-nut 16, the lower end of which is adapted to bear against a slotted sector 17 fixed upon the rear portion of hood 2. By loosening the thumb-nut 16 the reflector 8 may be adjusted to any desired angle, and then looked from .accidental movement by tightening the thumb-nut 16 against the sector 17.

19 designates a shutter located at the upper front portion of the casing 1, to the opposite sides of which it is pivotally-connected by two bolts 20. j

21 designates a shutter located at the upper front portion of hood 2, to the opposite sides of which it is pivotally-connected by two bolts 22.

The shutters 19 and 21 are held from accidental pivotal movement by thumb-nuts 20 and 22 engaging the threaded ends of bolts 20 and 22, respectively.

The interior front, side, and bottom walls of the casing l are finished in a dead white or other suitable color, to difluse more or less light over the surface .of the reflector 8, while the interior rear wall of said casing is finished, preferably, in black to prevent it from casting rays of light upon said reflector.

When the parts are adjusted as disclosed by Fig. 2, the rays cast by the light upon the reflector 8 will fall within the field indicated by the dotted lines A, and be projected by said reflector 8 within the zone indicated by the inclined dotted lines 13. Consequently, said rays will not be cast into the eyes of persons facing the lamp. However, if it is desired to project the rays from the reflector 8 in a horizontal plane, or at anangle above said horizontal plane. as indicated by the dotted lines C, as well as in the zone indicated by the lines B, the shutter 19 is swung downward to permit rays cast from the light to be projected upon the reflector 8 along the dotted line D. From the foregoing it will be understood that by lowering the shutter 19 the field of light cast from the reflector 8 is increased, and

-: of light forwardly and when the shutter is raised said field is diminished. Said field may be further controlled by proper adjustment of the reflector 8, or the shutter 21. ore or less reflected light from the interior side walls of the casing 1 will be cast upon the reflector 8, as indicated by the line E, and in turn be cast by said reflector along the dotted line F, and it is to intercept such rays and cast the same downward upon the roadway that the extension 18 is provided. i

While I have shown and described the preferred form of my invention, I reserve the right to make such modifications thereof as properly fall within the spirit and scope of the claims.

Having thus described my invention,'what I claim and desire to secure by Letters Patent is:

1. In a device of the character described, a casing to reflect rays of light upwardly, illuminating means therein, a reflector adj acent said illuminating means to project the rays downwardly, and means to cut off a portion of said rays.

2. In a device of the character described, an opaque casing open at its upper end, illuminating means therein, areflector ad jacent said illuminating means to project rays of light forwardly, and a shutter pivotally-mounted upon the casing to cut off a portion of said rays.

3. In a device of the character described, a casing having an upper open end, a hood surmounting said casing, a reflector mounted in said hood to receive and project rays of light, and illuminating means within the casing to project rays of light upon the reflector.

" receive" and 4. In a device of the character described, a casing, illuminating means. therein, a reflector adjacent said illuminating means to project rays of light cast therefrom, a hood surmounting said casing, a lever pivotally-mounted in said hood and carrying the reflector, a nut threaded upon said lever, and a segment on the hood adapted to be abutted by said nut to lock the lever in any of its adjusted positions.

' 5. ha device of the character described,

a wall, illuminating means in the rear of.

said wall, a reflector adjacent said illu1ninating means to receiveand project rays of light" cast therefrom, a hood surmounting the wall and arranged in the rear of said reflector, and a shutter ivotally-mounted upon said hood to cut efl a portion of the rays cast from the reflector.

6. A device oflthe character described, consisting of a casing having an opening in its upper end, a hood surmounting said casing, illuminating means within said casing to'project light upwardly therefrom, a reflector adjustably mounted in said hood to receive and project the rays of light from the casing, the hood to cut ofl a portion of the rays of light projected from the reflector, and a shutter pivoted to thelcasing to coact with the first-mentioned shutter in cutting olf a portion of the rays of light projected by the reflector.

In testimony whereof I afiix my signature, in the presence of two witnesses.

WILTON W. COGSWELL.

Witnesses: F. G. FISCHER, L. J. FISCHER.

a shutter pivotally-mounted upon