GB730588A - Improvements in or relating to electric light projectors particularly for subaqueoususe - Google Patents

Improvements in or relating to electric light projectors particularly for subaqueoususe

Info

Publication number
GB730588A
GB730588A GB1572852A GB1572852A GB730588A GB 730588 A GB730588 A GB 730588A GB 1572852 A GB1572852 A GB 1572852A GB 1572852 A GB1572852 A GB 1572852A GB 730588 A GB730588 A GB 730588A
Authority
GB
United Kingdom
Prior art keywords
lamp
electric
light projectors
subaqueoususe
relating
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
Application number
GB1572852A
Inventor
Patrick Thomas Cahill
Samuel Lewis Johnson
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.)
Mole Richardson England Ltd
Original Assignee
Mole Richardson England Ltd
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 Mole Richardson England Ltd filed Critical Mole Richardson England Ltd
Priority to GB1572852A priority Critical patent/GB730588A/en
Publication of GB730588A publication Critical patent/GB730588A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V31/00—Gas-tight or water-tight arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

730,588. Electric-light projectors. MOLE-RICHARDSON (ENGLAND), Ltd. March 25, 1953 [June 23, 1952], No. 15728/52. Class 75 (4). An electric-light projector, particularly for subaqueous use, comprises a closed lamp casing a containing an electric lamp d and a reflector s, and which need not be capable of withstanding pressures greater than 5 to 10 lb. per square inch, and which embodies a device, e.g. a bellows q, for equalizing the pressures inside and outside the lamp casing. The distilled water is introduced through a filling opening having a detachable cap o and a filter p. The lamp d may be a high-pressure discharge lamp of water-cooled type.
GB1572852A 1952-06-23 1952-06-23 Improvements in or relating to electric light projectors particularly for subaqueoususe Expired GB730588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1572852A GB730588A (en) 1952-06-23 1952-06-23 Improvements in or relating to electric light projectors particularly for subaqueoususe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1572852A GB730588A (en) 1952-06-23 1952-06-23 Improvements in or relating to electric light projectors particularly for subaqueoususe

Publications (1)

Publication Number Publication Date
GB730588A true GB730588A (en) 1955-05-25

Family

ID=10064434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1572852A Expired GB730588A (en) 1952-06-23 1952-06-23 Improvements in or relating to electric light projectors particularly for subaqueoususe

Country Status (1)

Country Link
GB (1) GB730588A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219811A (en) * 1963-02-05 1965-11-23 Clyde S Young Watertight flashlight with magnetic switch
EP0017638A1 (en) * 1979-03-30 1980-10-15 Studsvik Energiteknik AB Lamp device for underwater use

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3219811A (en) * 1963-02-05 1965-11-23 Clyde S Young Watertight flashlight with magnetic switch
EP0017638A1 (en) * 1979-03-30 1980-10-15 Studsvik Energiteknik AB Lamp device for underwater use

Similar Documents

Publication Publication Date Title
GB730588A (en) Improvements in or relating to electric light projectors particularly for subaqueoususe
GB555910A (en) Improvements relating to electric torches
GB402596A (en) Improvements in and relating to lamp supporting devices
SE381669B (en) LUMINISCEN SCREEN EQUIPPED WITH A LUMINISING CERIUM ALUMINATE, LOW PRESSURE MERCURY CHARGING CHARGE LAMP PROVIDED WITH SUCH A SCREEN AND LUMINISCING CERIUM ALUMINATE FOR MANUFACTURE OF THE SCREEN
GB578508A (en) Improvements relating to electric torches
CH316783A (en) Cinema projector with high pressure gas discharge lamp
CA508525A (en) High pressure discharge lamp
GB917769A (en) Kaleidoscope
GB714562A (en) Improvements in or relating to metal caps secured with the use of adhesive to the walls of objects
GB822053A (en) Improvements in or relating to optical projectors and enlargers
CA494199A (en) High pressure mercury vapor lamp
FR1528763A (en) High Pressure Sodium Vapor Lamp Improvements Containing Mercury
CA470476A (en) Projection lamps and mountings therefor
GB709316A (en) An improved vapour proof vehicle lamp
GB577178A (en) Improvements in hpmv electric discharge lamps adapted to be used as sources in optical projection apparatus
ES252235A1 (en) Improvements in or relating to devices comprising an electric source of light
ES201991A1 (en) Improvements introduced in the projector appliances. (Machine-translation by Google Translate, not legally binding)
CA396982A (en) Motion picture projector
CA486902A (en) Lanterns for high pressure metal vapour lamps
CA394285A (en) Motion picture projector mechanism
CA394283A (en) Motion picture projector mechanism
ES206685A1 (en) Double projector provided with great angular objectives (Machine-translation by Google Translate, not legally binding)
CA505620A (en) High pressure discharge lamp
GB739415A (en) Improvements in and relating to lighting fixtures
GB493079A (en) Improvements in or relating to lighting apparatus for use with headgear for personalwear