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Publication numberUS2382939 A
Publication typeGrant
Publication date14 Aug 1945
Filing date8 Jun 1944
Priority date8 Jun 1944
Publication numberUS 2382939 A, US 2382939A, US-A-2382939, US2382939 A, US2382939A
InventorsKoch Edward L
Original AssigneeGeorge W Gates & Co Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Ultraviolet lamp
US 2382939 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Aug. 14, 1945. E. L. KOCH ULTRA-VIOLET LAMP Filed June 8, 1944 INVENTOR. (fan Am A. rKacw new Patented Aug. 14, 1945 TES'iP-ATE assass's g ULTRAVIOLET Edward L. Koch, Willlston Park, N. Y., assignor to George W. Gates & 00., Inc, Long Island, a corporation of New York Application June a, 1944, Serial No. ssaess invention relates to invisible ray l p ICIaim.

such as are used for the activation of fluorescent or luminescent materials, and its object is toprovide a novel and improved device of this type.

Another object of the invention is to provide an invisible light unit of the above type which is simple in construction, inexpensive to man facture and assemble, and is considerably more durable than lamps previously employed for similar p p ses. I

Various other objects and advantages will be of the above-mentioned filtering material, and

apparent as the nature of the invention is more fully disclosed.

Although the novel features which are characteristic of this invention are set forth more in detail in the claim'appended hereto, the nature and scope of the invention may be better understood by referring to the following description, taken in connection with the accompanying drawing forming a part thereof, in which a specific embodiment has' been set forth for purposes of illustration.

In the drawing:

Fig. 1 is a longitudinal sectional view through a light unit embodying the invention;

Fig. 2 is an end view thereof and 18. 3 is a transverse section taken on the l e H of Fig. 1.

the following description certain specific te are-used for convenience in referring to the arlous details of the invention. These terms, however, are to be interpreted as broadly as the state'of the art will permit.

Thednvisible light unit shown in the drawing comprises a tubular fluorescent lamp I having end terminals 2 connected to coils 3 within the lamp, and a surrounding concentric tube or shield v4 of filter material as hereinafter more fully described.

The fluorescent lamp I may be of any suitable type adapted to radiate ultra-violet and near ultra-violet light rays, and is usually a low pressure mercury vapor arc lamp of the so-called hot cathode low voltage time.

In practice the fluorescent lamp i is usually coated on the inside with a suitable phosphor or other material adapted to convert a greater proportion of the invisible radiations of the low pressure mercury are into usable ultra-violet rays.

The filter tube 4 may be composed of any suitable translucent glass or plastic material adapted to filter out visible lisht rays and to pass only rays in the ultra-violet and near ultra-violet ranse.

For certain purposes I prefer to construct only one-half the area of the filter tube 1 shown at 4a the other half shown at 4!) of ordinary transparent glass or plastic material. That is, the portion in encompassing of the tube 4 may be composed of material adapted to filter out visible light rays and to transmit only rays in the ultraviolet and near ultra-violet range, while the portion 4b encompassing the remaining 180 of said tube may be composed of material adapted to pass ordinary visible light rays.

when a dual purpose shield of the above type is employed, the lamp may be rotated as a unit through 180 to transmit either ordinary light or "black light, as desired. In the latter case the invisible rays are usually directed upon some fluorescent material such as on an instrument dial forthe purpose of activating and rendering same visible.

The tubes l and l are secured in the desired spaced relation by means of asbestos washers 5 which are mounted adjacent the ends thereof, and the annular spaces between the tubes outwardly of said washers are sealed with fillings of adhesive cement 0. For this purpose I prefer to use an adhesive cement made in paste form, which is easy to apply. The asbestos washers I act as stops for the cement in applying same.

It is to be understood that the above example is only illustrative and that various changes and another portion composed of a material adapted to transmit visible light rays, annular spacers interposed between said lamp and shield adjacent the respective ends thereof, and adhesive means closing the spaces between said lamp and shield outwardly of said spacers and permanently sealing'said shield to said lamp in a unitary struc- EDWARD L. KOCH.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2615120 *23 Dec 194921 Oct 1952Michel E MacksoudPocket sun health lamp
US2820918 *14 Oct 195521 Jan 1958Robert AronsteinOptical device for therapeutic and other purposes
US2830002 *3 Jul 19538 Apr 1958Mohs Bruce BLens structure
US2962932 *13 May 19586 Dec 1960Kaprelian Edward KGas discharge light shutter
US3124307 *15 Feb 196310 Mar 1964 Vapor lamp units
US3288989 *20 Mar 196429 Nov 1966Cooper George DLight unit
US3457454 *1 Aug 196622 Jul 1969Ultra Violet Products IncStabilized light source for operation at substantially constant temperature and intensity
US4042849 *20 Oct 197616 Aug 1977Westinghouse Electric CorporationDischarge lamp with black light transmitting filter layer
US4048537 *4 Jun 197613 Sep 1977Gte Sylvania IncorporatedProtective ultraviolet-transmitting sleeve for fluorescent lamp
US4100415 *4 Jun 197611 Jul 1978Gte Sylvania IncorporatedModular photochemotherapy chamber
US4444189 *21 Dec 198124 Apr 1984Seiverd Paul JPhototherapy booth
US4970628 *13 Oct 198813 Nov 1990Labino Patent AbHeadlamp for automotive vehicles
US5448461 *25 Aug 19935 Sep 1995Ultralux AbMethod pertaining to vehicle headlamps which emit ultraviolet light, and an arrangement herefor
US661403923 Jun 19992 Sep 2003Brad C. HollanderHermetically sealed ultraviolet light source
US708122519 Jul 200025 Jul 2006Hollander Brad CMethods and apparatus for disinfecting and sterilizing fluid using ultraviolet radiation
US776286120 Feb 200827 Jul 2010Orion Energy Systems, Inc.Method and apparatus for mounting a light sleeve
US88163017 Dec 201226 Aug 2014Xenex Healthcare Services, LlcLamp and reflector arrangements for apparatuses with multiple germicidal lamps
US90932588 Jun 201128 Jul 2015Xenex Disinfection Services, LlcUltraviolet discharge lamp apparatuses having optical filters which attenuate visible light
US911418228 Feb 201225 Aug 2015Xenex Disinfection Services, LlcGermicidal systems and apparatuses having hollow tumbling chambers
US91657568 Jun 201120 Oct 2015Xenex Disinfection Services, LlcUltraviolet discharge lamp apparatuses with one or more reflectors
US95172842 Jul 201513 Dec 2016Xenex Disinfection Services, Llc.Germicidal apparatuses with configurations to selectively conduct different disinfection modes interior and exterior to the apparatus
US969800318 Mar 20154 Jul 2017Xenex Disinfection Services, Llc.Ultraviolet discharge lamp apparatuses with one or more reflectors
US97442556 Dec 201229 Aug 2017Xenex Disinfection Services, Llc.Systems which determine operating parameters and disinfection schedules for germicidal devices
US977365821 Jul 201526 Sep 2017Xenex Disinfection Services, Llc.Ultraviolet discharge lamp apparatuses having lamp housings which are transparent to ultraviolet light
US20090209162 *20 Feb 200820 Aug 2009Orion Energy Systems, Inc.Method and apparatus for mounting a light sleeve
US20120262912 *10 Apr 201218 Oct 2012Wong Shiu KeiUv fluorescent tube generating black light
DE2603460A1 *30 Jan 197611 Aug 1977Friedrich WolffUV radiation surface treatment appts. - has source and reflector producing high-density field near window and filters
DE3503654A1 *4 Feb 19857 Aug 1986Heraeus Gmbh W CUltraviolet irradiation lamp with a sheath
WO1992014628A1 *19 Feb 19923 Sep 1992Ultralux AbA method pertaining to vehicle headlamps which emit ultraviolet-light, and an arrangement herefor
WO2013106076A1 *8 Jun 201218 Jul 2013Xenex Healthcare Services, LlcUltraviolet discharge lamp apparatuses having optical filters which attenuate visible light
U.S. Classification313/489, 362/263, 313/112, 362/293, 313/25, 362/310
International ClassificationH01J61/34
Cooperative ClassificationH01J61/34
European ClassificationH01J61/34