US2135480A - Reflecting glow lamp - Google Patents

Reflecting glow lamp Download PDF

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Publication number
US2135480A
US2135480A US97912A US9791236A US2135480A US 2135480 A US2135480 A US 2135480A US 97912 A US97912 A US 97912A US 9791236 A US9791236 A US 9791236A US 2135480 A US2135480 A US 2135480A
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tube
lamp
reflecting
light
rays
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Expired - Lifetime
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US97912A
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Birdseye Clarence
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BIRDSEYE ELECTRIC Co
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BIRDSEYE ELECTRIC Co
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Priority to US97912A priority Critical patent/US2135480A/en
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00Gas- or vapour-discharge lamps
    • H01J61/02Details
    • H01J61/30Vessels; Containers
    • H01J61/33Special shape of cross-section, e.g. for producing cool spot

Description

REFLECT ING GLOW LAMP Filed Aug. 26, 1936 Iwvewiiw Cam 61,- by

Patented Nov. 8, 1938 UNITED STATES BEFLECTING GLOW LAMP Clarence Birdseye, Gloucester, Mass., assignor, by mesne assignments, to Birdseye Electric Company, a corporation of Delaware Application August 26, 1936, Serial No. 97,912

2 Claims.

This invention relates to gaseous discharge lamps of the tubular type and comprises an improved lamp having a reflecting surface incorporated in such a manner therein that the light 5 from the lamp is concentrated and directed in a beam of controlled direction rather than being uniformly emitted from all sides of the tube as heretofore.

More specifically my invention concerns ways and means of accomplishing this result in a relatively exact manner, since a generally satisfactory result will not be obtained, for example, by the simple expedient of making one half of the conventional cylindrical tube into a suitable reflecting surface. A reflecting gaseous discharge lamp of this simple design, while definitely superior to the same lamp without the reflecting surface, in thematter of directing and concentrating the light. will have a very wide cut-off .20 angle, much greater than 180, becauseof the high degree of luminosity of the curved transmitting area of the tube. This effect produced by the glowing tube surface, which appears to act as the light source, and which, because it stands out in a curved surface in front of the reflecting area, actually sends rays back behind the plane delineating the reflecting area. Thus in the case of a cylindrical tube made into a reflecting surface over half its area bounded by a plane passing through the axis of the cylinder, the cutofl angle, instead of being 180, actually is very much'greater, and this makes control of the rays from such a simple reflecting gaseous discharge lamp extremely difiicult.

In order to avoid this effect of an extremely wide angle of cut-off and almost uncontrolled direction of the rays from such a reflecting gaseous discharge lamp, it is proposed to impart to it three novel characteristics, viz.(1) make more'than one-half of the surface area of the tube into the reflector (so that more than half of the cross section of the tube perpendicular to the axis constitutes the reflecting surface), (2) flatten the transmitting surface, so that it does not appear to stand out in front of the reflecting area, and (3) shape the tube so that it is no longer a cylinder, not only flattening the transmitting area, but also deepening the trough, the surface of which is the reflecting area. Any one of these characteristics alone will aid in reducing the angle of cut-off and will make possible better control of the light 'rays, and a complete solution of the difliculty is readily possible by employing two or more of these characteristics in combination.

A gaseous discharge lamp of this character may be constructed to transmit substantially all its light within the confines of a definite beam of the desired shape and direction, and thus be utilized as a more efficient source of illumination than the gaseous discharge lamps heretofore available. Moreover, a lamp of this characteristic has a wide field of application not satisfactorily filled in the past. For example such a lamp may be used in front of a show window without upsetting the desired color effect within the display area.

Since the light rays emitted by a gaseous dis-.

charge lamp are usually of pronounced color, such rays are most undesirable for illuminating colored articles and great care must be taken not to allow rays from the lamp to fall upon goods being displayed. Green rays, for example, are effective to turn yellow goods to a mustard color, or orange goods to a brownish color. In using a gaseous discharge lamp constructed in accordance with the present invention, however, it is possible to direct all the rays of the lamp outwardly and. thus keep the show window space clear of the undesirable rays.

While my invention may be applied to lamps having a gas-filled tube of circular cross section, in the preferred embodiment of my invention I propose to carry the invention further and utilize it in lamps having a tube of non-circular cross section, for example, in tubes having a longitudinally flattened transmitting face, and reflecting walls comprising the body of the tube and terminating at its transmitting face. The body of the tube may be of any desired cross-sectional shape suitable to contain the column of ionized gas, or its walls may be shaped to reflect the light emitted from the gas column outwardly through the transmitting face of the tube. For example, I have shown herein a tube having a flattened transmitting face and a trough-shaped body portion provided with a reflecting coating. Preferably, and as herein shown, the reflecting surface may comprise more than half of the peripheral area of the tube. In accordance with my invention, the reflecting surface is incorporated in the lamp itself as an applied metal coating, or part of the tube may be of white opalescent glass and so act as a reflector. The transmitting surface on the other hand, may be of clear glass or frosted or otherwise treated in accordance with the requirements of the service to be supplied.

The lamp of my invention may be employed for advertising purposes and the tube bent into any desired configuration with its transmitting face directed as desired. For illuminating puris employed a tube of circular cross section,

Fig. 2 is a corresponding view in cross section on enlarged scale,

Figs. 3 and 5 are views in elevation of lamps in I which are employed tubes of non-symmetrical cross section,

Figs. 4 and 6 are corresponding views in cross section on enlarged scale,

Fig. '7 is a view in elevation of a lamp having a tube of flat spiral form.

The gaseous discharge glow lamps herein illus-- trated may contain neon gas, argon, carbon dioxide, mercury or sodium vapor, or any other gaseous medium suitable for the maintenance of a.

gaseous discharge between suitable electrodes within appropriate pressure ranges, or this gaseous discharge may be excited by any other suitable means' such as a high frequency electromagnetic field set up by an oscillating vacuum tube or a spark coil, etc. Electrodes are used with high voltage alternating current but are unnecessary with the high frequency field set up by such means as the oscillating vacuum tube and spark coil, for example.

The lamps shown in the drawing are represented more or less conventionally. In Figs. 1' and 2 the tube III of the lamp is circular in cross section and provided with an exterior coating ll of metallic silver constituting a reflecting surface extending circumferentially approximately and covering the tube Hi from end to end. The tube is provided with end caps and electrodes which are represented conventionally. In this lamp light is transmitted through the clear portion of the tube in a beam directed forwardly and this beam is reinforced by reflected light which is confined against spreading by the reflecting coating II. It will be seen therefore that the lamp provides a wide band of diffused light whose marginal portions emanate from the forward uncoated portion of the tube III, the light band being intensified in a central zone by light reflected from the coating II.

The tube of the lamp shown in Figs. 3 and 4 is not symmetrical in cross section and comprises a trough-shaped portion 12 which is provided face.

with an exterior coating ll of metallic silver and a flattened transmitting face I! which may be clear or frosted as desired. In this lamp the amount of diffused light transmitted is reduced as compared to the lamp of Figs. 1 and 2 by the flattening of the face l3. The arrangement I centrated beam of substantially parallel rays.

The lamp of Figs. 5 and 6 is also non-symmetrical in cross section comprising a tube hava ing an outwardly convex transmitting portion l5 and a concave rear wall l6 externally provlded with a coating ll of metallic silver. This lamp is effective for emitting a wide band of diffused light supplemented by a divergent band of light reflected by the coating II.

The lamp of Fig. 7 comprises a tube having a portion l9 trough-shaped in cross section and a flattened transmitting face Ill. The troughshaped portion is provided with a coating 20 of metallic silver and the tube as a whole is given a spiral form so that it constitutes a unit of substantially circular outline acting to transmit a relatively small amount of diffused light transversely and a relatively large amount of reflected light in a direction perpendicular to its general plane.

Various other applications of the invention will be apparent to those skilled in the art and changes in design, construction and arrangement are contemplated to meet different service demands. While metallic silver has been referred to as the material of the reflecting coating of the lamps; any material suitable to provide an eflicient reflecting surface may be employed within the scope of the invention.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is,

1.,A gaseous discharge lamp comprising a gas fllled tube having a longitudinal convex trans- CLARENCE BIRDSEYE.

US97912A 1936-08-26 1936-08-26 Reflecting glow lamp Expired - Lifetime US2135480A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909693A (en) * 1954-02-10 1959-10-20 Cibie Pierre Headlamp, notably vehicle headlamp
US2910605A (en) * 1958-06-23 1959-10-27 Gen Electric Radiant energy device
US2915664A (en) * 1954-12-14 1959-12-01 Gen Electric Tubular electric lamp
US2916645A (en) * 1956-04-17 1959-12-08 Gen Electric Tubular lamp envelopes
US2961565A (en) * 1954-12-14 1960-11-22 Gen Electric Low-pressure discharge lamp
US3048739A (en) * 1960-10-27 1962-08-07 Jr Edward Paul Electronic discharge tube
DE1211715B (en) * 1958-05-06 1966-03-03 A E I Lamp & Lighting Co Ltd Low pressure sodium vapor discharge lamp
US3254586A (en) * 1963-04-27 1966-06-07 Haus Hans Exposure apparatus
US4877991A (en) * 1987-12-21 1989-10-31 Colterjohn Jr Walter L Optical radiation source
US5316473A (en) * 1988-06-17 1994-05-31 Dentsply Research & Development Corp. Light curing apparatus and method
EP0738001A1 (en) * 1995-04-10 1996-10-16 General Motors Corporation Neon lamp suitable for automotive vehicles
US5773918A (en) * 1990-10-25 1998-06-30 Fusion Lighting, Inc. Lamp with light reflection back into bulb
US5903091A (en) * 1996-05-31 1999-05-11 Fusion Lighting, Inc. Lamp method and apparatus using multiple reflections
US6020676A (en) * 1992-04-13 2000-02-01 Fusion Lighting, Inc. Lamp with light reflection back into bulb
US6291936B1 (en) 1996-05-31 2001-09-18 Fusion Lighting, Inc. Discharge lamp with reflective jacket
US20030169997A1 (en) * 2002-03-06 2003-09-11 Federal-Mogul World Wide, Inc. Illuminating waveguide
US20040217709A1 (en) * 2003-05-02 2004-11-04 Wayne Strattman Apparatus for providing a kinetic lightning effect
US20040257793A1 (en) * 2003-06-18 2004-12-23 Toshitsugu Wakabayashi Backlight system
US20050047134A1 (en) * 1997-08-26 2005-03-03 Color Kinetics Controlled lighting methods and apparatus
US20050285547A1 (en) * 1997-08-26 2005-12-29 Color Kinetics Incorporated Light emitting diode based products
US20060006801A1 (en) * 2004-07-08 2006-01-12 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Halogen incandescent lamp
FR2882611A1 (en) * 2005-02-28 2006-09-01 Clarence Bouvant Neon lighting tube for decorative and/or informative lighting, has frosted surface extending on entire cylindrical part of tube, where junction zone between two opposite ends of two successive tubes is null
US7132785B2 (en) 1999-11-18 2006-11-07 Color Kinetics Incorporated Illumination system housing multiple LEDs and provided with corresponding conversion material
US7202613B2 (en) 2001-05-30 2007-04-10 Color Kinetics Incorporated Controlled lighting methods and apparatus
US7221104B2 (en) 1997-08-26 2007-05-22 Color Kinetics Incorporated Linear lighting apparatus and methods
US7300192B2 (en) 2002-10-03 2007-11-27 Color Kinetics Incorporated Methods and apparatus for illuminating environments
US20080049421A1 (en) * 2006-05-31 2008-02-28 Jenn-Wei Mii Luminescent assembly with an increased brightness
US7352339B2 (en) 1997-08-26 2008-04-01 Philips Solid-State Lighting Solutions Diffuse illumination systems and methods

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909693A (en) * 1954-02-10 1959-10-20 Cibie Pierre Headlamp, notably vehicle headlamp
US2915664A (en) * 1954-12-14 1959-12-01 Gen Electric Tubular electric lamp
US2961565A (en) * 1954-12-14 1960-11-22 Gen Electric Low-pressure discharge lamp
US2916645A (en) * 1956-04-17 1959-12-08 Gen Electric Tubular lamp envelopes
DE1211715B (en) * 1958-05-06 1966-03-03 A E I Lamp & Lighting Co Ltd Low pressure sodium vapor discharge lamp
US2910605A (en) * 1958-06-23 1959-10-27 Gen Electric Radiant energy device
US3048739A (en) * 1960-10-27 1962-08-07 Jr Edward Paul Electronic discharge tube
US3254586A (en) * 1963-04-27 1966-06-07 Haus Hans Exposure apparatus
US4877991A (en) * 1987-12-21 1989-10-31 Colterjohn Jr Walter L Optical radiation source
US5316473A (en) * 1988-06-17 1994-05-31 Dentsply Research & Development Corp. Light curing apparatus and method
US5773918A (en) * 1990-10-25 1998-06-30 Fusion Lighting, Inc. Lamp with light reflection back into bulb
US6020676A (en) * 1992-04-13 2000-02-01 Fusion Lighting, Inc. Lamp with light reflection back into bulb
US6072268A (en) * 1992-04-13 2000-06-06 Fusion Lighting, Inc. Lamp apparatus and method for re-using waste light
EP0738001A1 (en) * 1995-04-10 1996-10-16 General Motors Corporation Neon lamp suitable for automotive vehicles
US5903091A (en) * 1996-05-31 1999-05-11 Fusion Lighting, Inc. Lamp method and apparatus using multiple reflections
US6246160B1 (en) 1996-05-31 2001-06-12 Fusion Lighting, Inc. Lamp method and apparatus using multiple reflections
US6291936B1 (en) 1996-05-31 2001-09-18 Fusion Lighting, Inc. Discharge lamp with reflective jacket
US6509675B2 (en) 1996-05-31 2003-01-21 Fusion Lighting, Inc. Aperture lamp
US20050285547A1 (en) * 1997-08-26 2005-12-29 Color Kinetics Incorporated Light emitting diode based products
US7352339B2 (en) 1997-08-26 2008-04-01 Philips Solid-State Lighting Solutions Diffuse illumination systems and methods
US7845823B2 (en) 1997-08-26 2010-12-07 Philips Solid-State Lighting Solutions, Inc. Controlled lighting methods and apparatus
US20050047134A1 (en) * 1997-08-26 2005-03-03 Color Kinetics Controlled lighting methods and apparatus
US7221104B2 (en) 1997-08-26 2007-05-22 Color Kinetics Incorporated Linear lighting apparatus and methods
US7161313B2 (en) 1997-08-26 2007-01-09 Color Kinetics Incorporated Light emitting diode based products
US7132785B2 (en) 1999-11-18 2006-11-07 Color Kinetics Incorporated Illumination system housing multiple LEDs and provided with corresponding conversion material
US8142051B2 (en) 1999-11-18 2012-03-27 Philips Solid-State Lighting Solutions, Inc. Systems and methods for converting illumination
US7550931B2 (en) 2001-05-30 2009-06-23 Philips Solid-State Lighting Solutions, Inc. Controlled lighting methods and apparatus
US7202613B2 (en) 2001-05-30 2007-04-10 Color Kinetics Incorporated Controlled lighting methods and apparatus
US20030169997A1 (en) * 2002-03-06 2003-09-11 Federal-Mogul World Wide, Inc. Illuminating waveguide
US6915062B2 (en) 2002-03-06 2005-07-05 Federal-Mogul World Wide, Inc. Illuminating waveguide
US7300192B2 (en) 2002-10-03 2007-11-27 Color Kinetics Incorporated Methods and apparatus for illuminating environments
US6924598B2 (en) 2003-05-02 2005-08-02 Wayne Strattman Apparatus for providing a kinetic lightning effect
US20040217709A1 (en) * 2003-05-02 2004-11-04 Wayne Strattman Apparatus for providing a kinetic lightning effect
US7314288B2 (en) * 2003-06-18 2008-01-01 Nec-Mitsubishi Electric Visual Systems Corporation Backlight system
US20040257793A1 (en) * 2003-06-18 2004-12-23 Toshitsugu Wakabayashi Backlight system
US7397192B2 (en) * 2004-07-08 2008-07-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Halogen incandescent lamp
US20060006801A1 (en) * 2004-07-08 2006-01-12 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Halogen incandescent lamp
EP1632986A2 (en) * 2004-07-08 2006-03-08 Paten Treuhand Gesellschaft für Elektrische Glühlampen MBH. Halogen incandescent lamp
FR2882611A1 (en) * 2005-02-28 2006-09-01 Clarence Bouvant Neon lighting tube for decorative and/or informative lighting, has frosted surface extending on entire cylindrical part of tube, where junction zone between two opposite ends of two successive tubes is null
US20080049421A1 (en) * 2006-05-31 2008-02-28 Jenn-Wei Mii Luminescent assembly with an increased brightness
US7530715B2 (en) * 2006-05-31 2009-05-12 Jenn-Wei Mii Luminescent assembly with shortwave and visible light source

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