US2376806A

US2376806A - Lighting unit

Info

Publication number: US2376806A
Application number: US477045A
Authority: US
Inventors: Willis A Pennow
Original assignee: Westinghouse Electric and Manufacturing Co
Current assignee: CBS Corp
Priority date: 1943-02-25
Filing date: 1943-02-25
Publication date: 1945-05-22
Anticipated expiration: 1962-05-22

Description

W. A. PENNOW LIGHTING UNIT May 2 2,1945.

' Filed Feb; 25, 1945 WITNESSES:

YINVENTOR 14/1/05 ifiznnorv.

Patented May 22, 1945 IUNITED STATES PATENro rlcEf I LIGHTINGUNIT V Willis A. Pennow, Cleveland, Ohio, assignor.

Westinghouse Electric -& Manufacturing Company, East Pittsburgh, Pa a corporation of Pennsylvania Application February 25, 1943; Serial :No: 477,045

e Claims. (01; 240-41) terial-of which glass isa common example, creates the problem of supporting the reflector within the housing in a simple and economical manner, and so that it is not easily damaged from shock but still readily detachable for replacement and servicing. Itis to the solution of this problem that the present 'inventionisdirected.

Thereforeit is-an object of my invention, generally stated, to provide a'floodlight projector of the type utilizing a frangible reflector which shall projector embodying the principal features of the invention.

Referring to the drawing, there is shown-a lighting unitinthe form of a-floodlight projector comprising, generally, a rigid metallic housing ID with a hinged cover II, in'cluding'a lens [2 and a lens holding ring l3 and a reflector I4,

The housing Ill is preferably composed of a durable and rigid material, suchas metal; is'generally bell-shaped and has aneckeddown end portion in which a socket? '(not shown)'-for supporting. and. conducting: current) to the lamp l5 is mounted;v The-front cover H of the'housing be of; simple and rugged. construction, economical to'manufacture and which shall be so constructed as to effectively protect. the reflector against breakage dueto shock.

A more specific object of my invention .is to provide for mountinga glass reflector in a. rigid metal housing in such manner as to. minimize the possibility of' damage tothe reflector due to shock; v

Afurther object of.my invention is to provide forsupporting a reflector of frangible'mate'rial within the rigid metallic housing of a lighting unit by means of simple resilient support members associated and positioned withinthe housing as to effectively support and retain the reflector in the housing in full spaced relation to the inside walls. thereof.

Another object of the invention is. to provide for utilizing resilent support members forxmounte ing and retaining a glass reflector within the rigid housing of a floodlight projector.

A further object of the'invention is to provide for supporting a frangible reflector within the rigid housing of a floodlight projector by means of a plurality of flexible elongated spring members disposed in spaced relation between the reflector and housing.

These and other objects of the invention will become more apparent from the following detailed description when read in conjunction with the drawing, wherein the single figure is a side view in elevation and partly in section of a floodlight comprises the ring l3 hinged tothehousing, as shownat I6, and thelens lzi attached'to thering in any suitable manner. 'The cover ll maybe clamped to the housing by means of suitable fasteners (not shown)'.

In this instance, the reflector I4 is composed of a frangiblematerialiof which the most common example isglass; In order to provide for supporting the reflector within the housing .in

such manner that it. willnot be damagedxwhen subjected to shock and stillpermitof its readyfremoval for. replacement. oncleaning a resilient mounting arrangement is'utilized. n

In this instancethis 1 mounting arrangement comprises a plurality ofelongated spring mem bers I] disposed in spaced relation between the.

reflector and the inside "wallsiof the housing and .so shaped and arranged asto'-support the reflector in full spaced relationfrom the housing. As shown, the resilient support members H are preferably composed offlat spring'material and are' attached to the housing"intermediate their ends by themachine screws [8. The point of attachment provides'two freends, the longer, .19, of whichis bent upwardlyfto engage the" outside surface of the reflector. h n 2: r this longer portion 19 rests upon" the inside oftlie housingadj acent the rear. end of the reflector and thus forms a resilient seat. upon Iwhichfthe re- 1 flector rests. The shorter portion 22 extends upwardly and beyond the outer rim of the -refront; support for the ples of the invention.

reflector within the housing.

terial 26 may be provided on the longer end portions IQ of the support members.

In view of the foregoing, it will be apparent Y that the plurality of support members I! function to resiliently support the reflector within the housing as well as to efiectively retain it in the proper operating position independently Qf any additional fastening means. "The reflector is supported entirely out .of contact with the inside walls of the rigid housing and thereforeis pro.-

tected to a maximum degree from damage dueto' shock. The use of the detachable fastenin or-.

holding clip 23 makesit possible to readily remove the reflector from the'ho'using' for replace ment or cleaning purposes.

It is to be understood that the supporting arrangement described may be used regardless of the shape of the housing or reflector, it beingtermediate its ends to engage the reflector intermediate its ends and the shorter portion also being bent upwardly to support the'reflector at one end thereof, and clip members attached to the end of the shorter portion. of the spring members for retaining the reflector against endwise movement. V I I 4. A lighting unit comprising, a generally bell shaped rigid reflector; housing, a reflector of frangible material mounted therein, said 1e- "flector being of the same general shape as the inside" surface of the housing except'of smaller diameter throughout its length, a plurality of necessary only to shape and arrange therflexible.

support members I! soas to maintain the proper spacing between the reflector and'the housing. While I have shown and described a specific embodiment of my invention, it is to be understood that changes and modifications may be made therein without departing from the princi-' I claim as my invention: l. A lighting unit comprising, a rigid and enerally lbell-shaped housing, a reflector of frangible material mounted within the housing and a plurality of resilient members in the formgof I flat spring members disposed, in spaced. relation about the reflector between said reflector and housing and attached to the housing interme diate their ends only for resiliently supporting the reflector inspaced relation to the insidepf the housing, and means carried by the outer ends of said flat .springmembers for retaining the 2. A floodlight unit comprising; a generally bell-shaped rigid housing, a glass refleotor'mounted therein, a plurality of elongated resilient support members attached to the inner walls of the housing for supporting the reflector thereinlin spaced relation thereto, said support :memb'ers being attached to the" housing intermediatetheir ends, and clamp means attached to one endiof the support members for engaging the rim of the reflector. '1

,3-. A lighting unit comprising, a generally bell- 'free endportionsone of which is longer than the other, the longer portion being bent upwardly inelongated spring members interposed between the adjacent surfaces of "the reflector andhousing for resiliently supporting the reflector in spaced relation to 'theinside walls of the housing, each of said'spring 'members being rigidly secured to the housing intermediate their ends to provide. two free end portions one of which'is longer than the other, the'longer portion beingbowed up-V wardly intermediate its ends'to engage the re flectorintermediate its ends and having its free end resting upon the housing and the shorter or tionbeing bent upwardly to support the reflector at the outer end 'thereofl'clip members attached to the end of the shorter portion ofv the spring members and engaging the outer rim of the reflector for retaining'the reflector-against end wise movement, and cushioning means inter posed between the reflector and spring members at points of engagement. j

5, A lighting unit comprising, a generally bell- V shaped reflector housing,*a reflector of frangible material mountedtherein, a plurality of, separate elongated resilient support members disposed in spaced relati'onabout the reflector between-the outer wallof said reflector'and the innerwall; of the housing, said support members being at-. tached to the housing intermediate their ends only and having opposed end portions on opposite sides of the point of attachment disposed in spaced relation to the inner wall .ofthe "housing and in supporting relation to the "reflector to resiliently support the reflector in spacedrelation to the housing, andholding mean'smounted on said support members for retainingthe reflector within the housing.

, 6. A lighting unit comprising; a generally bell-- shaped'reflector housing, a glass reflector'positioned in'said'housing, and means 'for resilient- 1y supporting said reflector within the housing in spaced relation to the inner walls thereof'ineluding a plurality of elongated flat spring mem'- bers interposed between the reflector and -h0using' and attached to, the housing intermediate their ends only, each of said spring members having one end portion thereof so shaped as to engage the reflector intermediate its ends only and the opposite end portion so shaped as to engage the reflector at theouterrim portion of the v reflector only.

. r I WILLIS A. PENNOW.