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Publication numberUS1318263 A
Publication typeGrant
Publication dateOct 7, 1919
Filing dateDec 12, 1918
Publication numberUS 1318263 A, US 1318263A, US-A-1318263, US1318263 A, US1318263A
InventorsL. Caccese
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1318263 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Oct. 7,1913.




' I APPLICATION FILED 'DEC. I2, 1918 1,318,263. Patented 001;. 7,1919.





Specification of Letters Patent.

Patented Oct.- 7, 1919.

Application filed December 12, 1918. Seria1 No. 266,453.

invented a new and Improved Searchlight,

of which the following is a full, clear, and

exact description. -This invention relates to high powered searchlights and has particular reference to theconstru-ction of such ,a device as contemplates-. inot only maximum illuminating power, but also means to prevent damage due to excessive heat. 7

-=-With the foregoing and other objects in view the invention consists in the arrangement and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details,

of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same partsin the several views, and in which Figure 1 is vertical longitudinal section showing a preferred embodiment of my improvement. a Fig. 2 is a smaller diagrammatic side elevation showing the exterior appearance of the construction.

Fig; 3 is a view of the same character as Fig. '2.but showing the multi-part casing swung open. a

Fig. .4; is..a front elevation corresponding to the'view of Fig. 1. 1

Fig. 5 is a vertical the line 55-0f Fig. 1; and

' Fig. 6. is a detailview on the line 6 6 Fig. 5.

, Referring now more specifically tothe. drawings I show a construct1on for. high powered searchlights involving a casing shown in this instance as comprising three main parts 10,11, and 12, the several parts of the casing being arranged to accommodate: independent lamps or a series of lamps, and

each part of the casing furthermore consti-' tuting reflecting means for either its own lamps or those of. other sections. Section 10 is or may be formed in a general way similar to an ordinary parabolic reflector, having a curvature somewhat less than a hemisphere and .provided with a single socket 13 for the accommodation of transverse section on a large and powerful lamp 14:- arranged directly in the focal axis of the reflector.

The casing section 11 may be described as being of short cylindrical or tubular structure, the diameter of whichconforms to the largest diameter of the section 10 to which it is movably connected as through ahinge 15. "A catch 16 of-any suitable nature ar-' maybe of any suitable form for best reflecting results, but illustrated as'being approximately frusto-conical and having its smaller or inner end abutting against the outer end of the tubular section 11 and to which it is movably attached by means'of a hinge 19 at one side and provided with a catch 20 on the opposite side. The flaring section 12 carries a circular series of lamps 21 which may be similar to the lamps 17 or larger and all arranged in substantially the same transverse plane although the sockets 2 2 for these lamps 21 have their axes perpendicular to the adjacent side walls of the section 12, and hence not radial as are the sockets 18 with respect to the focal axis of the reflector. I

These lamps are necessarily of high candle power and voltage and consequently an enormous amount of heat is developed thereby; In order to prevent overheating of the casing or reflector as a whole, I provide for the-several lamp bases and sockets extra 25 for thg respectlve casingssections. Surrounding the socket; 13 and the opening23 I provide/Ia casing extensionorlhood 26 hav- "ing -.a ssu'nable number of air lioies '26 formed through its side walls to insure ample circulation of. air. The sockets18 and openings 24 likewise are guardedby a 'casing extension or hood 27 having along its rear wall a wide open slot or air space 27.

A similar hood 28 having a wide openair slot 28 surrounds the sockets 22 and draft openings 25 in the flaring casing section 12.

' These hood structures in either the tubular form at 26 or the annular forms at 27 and- 28 serve to insure free cooling circulation of air through the casing and around the lamps, and yet preventany glare of light emerging through any portion of the casing except from the front as intended.

As above premised the interior surfaces of the casing sections are all made of a reflecting nature. Any suitable means may be provided to carry out this purpose. Suffice it to say, therefore, that all of the exposed interior surfaces of these sections are reflectors. Referring, however, more specifically to sections 11 and 12 it will be noted that I provide a pair of collars or rings 29 and 30 fixed to the inner walls of these sections respectively and abutting against each other in a plane perpendicular to the focal axis of the reflector and substantially in the plane'of the, joint between the sections 11 and 12. The ring 29 may be described, therefore, as having a cylindrical outer surface, a flat front surface, and a concave inner surface. v The concave surface is a reflector and is directed toward the series of lamps 17 adjacent to which said lamps are fixed. The outermost ring 30 may be de: scribed as having a frusto-conical outer'surface abutting against the inner wall of the flaringv section 12, .the flat rear surface against the flat front surface of the ring 29,

and a concave front surface adjacent to which the lamps 21 are located. Further-- more these two rings have registering central circular openings 31 and 32 respectively of sufficient capacity to permit the light from the lamp 14 to emerge in a strong beam parallel to the focal axis of the structure and the diverging rays of light from lamps 17. The major portion of the light from the lamps 21 is caused to emerge directly from the front concave surface of the ring 30 and the flaring reflecting surface of the section 12,. although a portion of the light from these lamps may bereflected from the parabolic reflector 10. -Any suitable wiring devices may be employed within the-skill of an electrician that \vill'supply current to the several lamps.

I claim 1. In a Searchlight, a multi-part casing, one part being parabolic and having a lamp at its focus, the front partsbeing of different shape from the first mentioned part, a circular series of lamps arranged in each of the other parts, and reflecting means serving to front thereof and acting to cause the light from the lamps to be reflected inward to the first mentioned section and thence outward through the center of the ring, a third conical part, a series of lamps arranged around the conical part, arranged to have their light reflected outwardly by the conical part, and means to secure the a three parts of.the casing together.

3. In a Searchlight, the combination of a,

casing, the rear end of' which isparabolic, a lamp fitted at the focus of the parabolic portion, two circular series of lamps -ar .ranged in parallel planes perpendicular to said axis and located in the front portions of the casing, and reflecting means carried by said front portions of the casing to cause the light from the lamps to be thrown forward in a solid beam parallel to the axis ofthe casing and in rays diverging from the axis.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7063441Jul 2, 2003Jun 20, 2006Kramer Eric WSoft light fixture
US20050002190 *Jul 2, 2003Jan 6, 2005Kramer Eric W.Soft light fixture
U.S. Classification362/247
Cooperative ClassificationF21V7/09