US1159418A - Projection-lantern. - Google Patents

Description

J. T. ROFFY.

PROJECTION LANTERN.

APPLICATION FILED JAN-6.1913.

Patented. Nov. 9, 1915.

IN VE N TOR.

ORNEY IN FACT This, as well as other objects which will *a eras ATE @FFXQE.

JOSEPH '1. ROFFY, OF NEW YORK, N. Y., ASSIGNOR TO A K-RAY CORPORATION, A CORPORATION OF NEW YORK.

PROJECTION-LANTERN.

Specification of Letters Patent.

Patented Nov. 9, 1915.

Application filed. January 6, 1913. Serial No. 740,375.

7 To all whom it may concern made a new and useful Invention in Projection-Lanterns, of which the following is a specification.

This invention relates to improvements in lighting apparatus and more particularly to headlights and searchlights.

An object of this invention has been to provide a headlight or Searchlight having two independent beams of light, one of which is achromatic and therefore when properly directed, devoid of glare, and the other of which is of the parallel character.

readily appeag to those skilled in this art, I attain in the evice described in the specification and illustrated in the single sheet of drawings accompanying the same.

surfaces toward the light source.

.cipal focus coinciding with the The single figure in the drawings is adiagrammatic view of a device embodying this invention.

As the housing for the device may be of any desired form or character and does not constitute a portion of this invention, no housing has been shown; merely theelements entering into the makeup of the. invention have been shown arranged in proper relation. 2

The device consists of a parabolic reflector 2 and a spherical reflector 3 so related oneto the other that their principal foci coincide. vIn this common focus the filament 4 of a lamp 5 is placed. The filament is surrounded by amushroom-shaped globe 6.

Two condensing lenses 7 and 8, which together form a condensing set, are supported along the line of the principal axis of the reflectors and arranged with their plane Between this lens-set and the light source a ring reflector 9 is placed. This ring reflector is a section of a sphere and is polished on its concave surface and arranged with its prinprincipal focus of spherical reflector 3. r

A projection lens 10 of the convex variety is supported along the line of the common axis of the reflectors and condensing lens-set at a distance from the condensing lensset which is slightly less than the focus of the projection lens 10.

The ring reflector 9 performs a double function; it limits the aperture of the condensing lens-set and recovers deflected light.

It will be seen that with this device'two independent beams of light will be pro jected in 'a determined and useful direction; one beam which I designate achromatic will be derived from the condensing set, and one of the parallel character will be derived from the parabola, and both will be proiected through lens 10 in the same direction.

Having thus described my invention, what I claim is:

1. In a head light, a source of light, a spherical reflector behind the source of light. a condensing lens in front of the source of light, a parabolic reflector contiguous with the spherical reflector and extending around the lens, a ring shaped spherical reflector between the source and the condensing lens having its concave face next said source and a projecting lens in front of said condensing lens and receiving reflected and transmitted light from said source.

2. In a head light, in combination with a source of light, a spherical reflector behind said source of light, a condensing lens in front of said source of light, the condensing lens and source of light being in close proximity, a parabolic reflector surrounding said source of light and a ring shaped inverted reflector between the source of light and the condensing lens, said ring shaped reflector being substantially co-extensive in diameter with the spherical reflector.

In testimony whereof, I have hereunto subscribed my name this 2nd day of January, 1913. p

JOSEPH T. ROFFY. Witnesses:

ADA ROMING, ANNA CLOHERTY.

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