GB473007A - Improvements in and relating to cinematograph projector mechanism - Google Patents

Improvements in and relating to cinematograph projector mechanism

Info

Publication number
GB473007A
GB473007A GB1001336A GB1001336A GB473007A GB 473007 A GB473007 A GB 473007A GB 1001336 A GB1001336 A GB 1001336A GB 1001336 A GB1001336 A GB 1001336A GB 473007 A GB473007 A GB 473007A
Authority
GB
United Kingdom
Prior art keywords
switch
plunger
door
spool box
opened
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
GB1001336A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB1001336A priority Critical patent/GB473007A/en
Publication of GB473007A publication Critical patent/GB473007A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/18—Fire preventing or extinguishing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

473,007. Kinematograph projectors. BRITISH THOMSON-HOUSTON CO., Ltd., and BOWEN, A. April 4, 1936, No. 10013. [Class 97 (i)] A spool box for a projector is provided with means for cutting off the current supply to the projector lamp when the door of the spool box is opened. As shown, the hinged door 2 of a spool box 1 carries a projection 3 engaging a plunger 4 when the door is closed. A switch lever 6, pivoted to the plunger, is then in a position such that the switch is closed ; when the door is opened, a spring 8 moves the plunger and lever to open the switch. The switch may operate through a relay, and may also control the motor or other circuit. The plunger may be within the spool box, and the switch may be positively opened or positively closed. Specification 462,544 is referred to.
GB1001336A 1936-04-04 1936-04-04 Improvements in and relating to cinematograph projector mechanism Expired GB473007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1001336A GB473007A (en) 1936-04-04 1936-04-04 Improvements in and relating to cinematograph projector mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1001336A GB473007A (en) 1936-04-04 1936-04-04 Improvements in and relating to cinematograph projector mechanism

Publications (1)

Publication Number Publication Date
GB473007A true GB473007A (en) 1937-10-04

Family

ID=9959789

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1001336A Expired GB473007A (en) 1936-04-04 1936-04-04 Improvements in and relating to cinematograph projector mechanism

Country Status (1)

Country Link
GB (1) GB473007A (en)

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