US3809942A - Closed reflector provided with incandescent lamp - Google Patents

Closed reflector provided with incandescent lamp Download PDF

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Publication number
US3809942A
US3809942A US00263415A US26341572A US3809942A US 3809942 A US3809942 A US 3809942A US 00263415 A US00263415 A US 00263415A US 26341572 A US26341572 A US 26341572A US 3809942 A US3809942 A US 3809942A
Authority
US
United States
Prior art keywords
housing
reflector
closed
face plate
drying agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00263415A
Other languages
English (en)
Inventor
A Boekkooi
W Westerveld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3809942A publication Critical patent/US3809942A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/30—Ventilation or drainage of lighting devices
    • F21S45/33—Ventilation or drainage of lighting devices specially adapted for headlamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof

Definitions

  • Theinvention relates to a closed reflector unit provided with an incandescent lamp, comprising a reflec tor housing accommodating the incandescent lamp and a transparent face plate which is secured to the reflector housing by means of an adhesive.
  • the reflector housing and the face plate accommodates a' drying agent over which the water vapour pressure at. the highest operating temperatureawhich may occur in this space is lower than or approximately corresponds to the water vapour pressure at C.
  • the socalled molecular sieves are particularly suitable as drying agents.
  • Examples are the synthetic zeolites as are marketed by the Firm of Union Carbide. Dew points of less than 0C can readily be realised with these materials.
  • the drying agent may be provided at a comparatively arbitrary area within the space enclosed by the reflector housing and the transparent face plate. It is evident that the temperature occurring locally during use is to be taken into account when selecting this area. It is advantageous to provide the drying agent at the area which is coolest during use. Furthermore it is desirable to provide the drying agent in such a manner that loss of light does'not occur.
  • the drying agent is therefore preferably provided as closely as possible to the rim of the reflector housing where it is secured to the face plate by means of the adhesive.
  • the quantity of the drying agent to be provided is calculated in such a manner that the desired effect is achieved in any case during the period of use of the incandescent lamp.
  • Their great water-absorbing capacity render molecular sieves very suitable for the envisaged object.
  • the FIGURE diagrammatically shows in a crosssection a reflector unit comprising; a reflector housing 1 consisting of, for example, steel whose inner side is provided with a reflecting coating of aluminum, a transparent face plate 2, for example, of glass and a halogen incandescent lamp 4 which is secured to a rear plate. 3.
  • the rear plate 3 and the'transparent face plate 2 are secured together with the aidof an adhesive, for example, a cold-setting epoxy resin (5 and 6).
  • a ridge 7 accommodating the drying agent (Molecular Sieve type 4A of the firm Union Carbide) is provided in the reflector housing near the edge. 2
  • a closed reflector unit comprising: a reflector housing. accommodating a closed incandescent lamp and a transparent face plate which is secured to the reflector housing by means of an adhesive, said housing and the transparent face plate enclosing a space which accommodates a drying agent over which the water vapour pressure at the highest operating temperature which may occur in said space is lower thanor approximately corresponds to the water vapour pressure at 0C.
  • a closed reflector unit as claimed in claim 1 3.
  • a closed reflector unit comprising:
  • a housing having a reflective internal surface, said housing being open at one end;
  • a closed incandescent lamp positioned within the housing;
  • a transparent face plate which is secured to the reflector housing at the open end of the housing by means of an adhesive, said housing and faceplate enclosing a space therebetween;
  • a drying agent positioned within said space over which agent the. water vapour pressure at the highest operating temperature which may occurin said space is lower than or approximately equals the water vapour pressure at 0C, whereby condensation of water vapour in liquid form upon the reflective internal surface of the housing is avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Optical Elements Other Than Lenses (AREA)
US00263415A 1971-06-21 1972-06-16 Closed reflector provided with incandescent lamp Expired - Lifetime US3809942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7108536A NL7108536A (enrdf_load_stackoverflow) 1971-06-21 1971-06-21

Publications (1)

Publication Number Publication Date
US3809942A true US3809942A (en) 1974-05-07

Family

ID=19813449

Family Applications (1)

Application Number Title Priority Date Filing Date
US00263415A Expired - Lifetime US3809942A (en) 1971-06-21 1972-06-16 Closed reflector provided with incandescent lamp

Country Status (6)

Country Link
US (1) US3809942A (enrdf_load_stackoverflow)
JP (1) JPS5525706B1 (enrdf_load_stackoverflow)
DE (1) DE2228684A1 (enrdf_load_stackoverflow)
FR (1) FR2143171B1 (enrdf_load_stackoverflow)
GB (1) GB1367234A (enrdf_load_stackoverflow)
NL (1) NL7108536A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146812A (en) * 1978-05-01 1979-03-27 Gte Sylvania Incorporated Motor vehicle headlight having filling hole sealed with non-rigid material
US4429249A (en) 1980-03-10 1984-01-31 General Motors Corporation Sealed beam lamp and method of manufacture
CN113574318A (zh) * 2019-01-14 2021-10-29 玛斯柯有限公司 用于减少led照明灯具中的水分的装置、方法及系统
US20230258318A1 (en) * 2019-01-14 2023-08-17 Musco Corporation Apparatus, method, and system for reducing moisture in led lighting fixtures

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240853A (en) * 1978-10-20 1980-12-23 Esquire, Inc. Lens closure for light fixture and method for attachment
DE4339954A1 (de) * 1993-11-24 1995-06-01 Porsche Ag Scheinwerfer für ein Kraftfahrzeug
FR2871750A1 (fr) * 2004-06-18 2005-12-23 Valeo Vision Sa Dispositif d'eclairage et/ou de signalisation pour vehicule automobile

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1992852A (en) * 1930-04-16 1935-02-26 Bader Jakob Surge protector
US2464990A (en) * 1945-08-28 1949-03-22 Westinghouse Electric Corp Electric lamp manufacture
US2594753A (en) * 1949-10-06 1952-04-29 Gen Motors Corp Sealed beam lamp
US2882244A (en) * 1953-12-24 1959-04-14 Union Carbide Corp Molecular sieve adsorbents
US3010045A (en) * 1955-05-27 1961-11-21 Westinghouse Electric Corp Sealed-beam lamp and method of manufacture
US3022439A (en) * 1960-03-11 1962-02-20 Polaroid Corp Electric lamps
US3465193A (en) * 1966-09-15 1969-09-02 Philips Corp Incandescent lamp containing a getter for binding water vapor
US3614507A (en) * 1968-02-15 1971-10-19 Philips Corp Device for producing stimulated infrared emission, iraser, by means of an electric discharge in a gas mixture consisting partly of carbonic acid gas, and discharge tube destined for such a device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4836782U (enrdf_load_stackoverflow) * 1971-09-04 1973-05-02

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1992852A (en) * 1930-04-16 1935-02-26 Bader Jakob Surge protector
US2464990A (en) * 1945-08-28 1949-03-22 Westinghouse Electric Corp Electric lamp manufacture
US2594753A (en) * 1949-10-06 1952-04-29 Gen Motors Corp Sealed beam lamp
US2882244A (en) * 1953-12-24 1959-04-14 Union Carbide Corp Molecular sieve adsorbents
US3010045A (en) * 1955-05-27 1961-11-21 Westinghouse Electric Corp Sealed-beam lamp and method of manufacture
US3022439A (en) * 1960-03-11 1962-02-20 Polaroid Corp Electric lamps
US3465193A (en) * 1966-09-15 1969-09-02 Philips Corp Incandescent lamp containing a getter for binding water vapor
US3614507A (en) * 1968-02-15 1971-10-19 Philips Corp Device for producing stimulated infrared emission, iraser, by means of an electric discharge in a gas mixture consisting partly of carbonic acid gas, and discharge tube destined for such a device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146812A (en) * 1978-05-01 1979-03-27 Gte Sylvania Incorporated Motor vehicle headlight having filling hole sealed with non-rigid material
US4429249A (en) 1980-03-10 1984-01-31 General Motors Corporation Sealed beam lamp and method of manufacture
CN113574318A (zh) * 2019-01-14 2021-10-29 玛斯柯有限公司 用于减少led照明灯具中的水分的装置、方法及系统
US20230258318A1 (en) * 2019-01-14 2023-08-17 Musco Corporation Apparatus, method, and system for reducing moisture in led lighting fixtures
CN113574318B (zh) * 2019-01-14 2024-04-16 玛斯柯有限公司 用于减少led照明灯具中的水分的装置、方法及系统
US12085262B2 (en) * 2019-01-14 2024-09-10 Musco Corporation Apparatus, method, and system for reducing moisture in LED lighting fixtures

Also Published As

Publication number Publication date
JPS5525706B1 (enrdf_load_stackoverflow) 1980-07-08
NL7108536A (enrdf_load_stackoverflow) 1972-12-27
FR2143171B1 (enrdf_load_stackoverflow) 1977-12-23
FR2143171A1 (enrdf_load_stackoverflow) 1973-02-02
GB1367234A (en) 1974-09-18
DE2228684A1 (de) 1973-01-18

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