GB249787A - Improvements in and relating to cinematograph projectors - Google Patents

Improvements in and relating to cinematograph projectors

Info

Publication number
GB249787A
GB249787A GB3262325A GB3262325A GB249787A GB 249787 A GB249787 A GB 249787A GB 3262325 A GB3262325 A GB 3262325A GB 3262325 A GB3262325 A GB 3262325A GB 249787 A GB249787 A GB 249787A
Authority
GB
United Kingdom
Prior art keywords
casing
lamp
doors
motor
projector
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
GB3262325A
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.)
Butcher & Sons Ltd W
Original Assignee
Butcher & Sons Ltd W
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 Butcher & Sons Ltd W filed Critical Butcher & Sons Ltd W
Priority to GB3262325A priority Critical patent/GB249787A/en
Publication of GB249787A publication Critical patent/GB249787A/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

249,787. Butcher & Sons, Ltd., W., and Joseph, I. Dec. 24, 1925. Kinematograph appa.ratus. - A motordriven projector is completely enclosed in a metal casing, and any door of the casing capable of being opened from the outside operates a switch to stop the motor and a switch to cut off or reduce the supply of current to the lamp. As shown, the casing comprises doors 2, 3 on one side, and two doors on the opposite side carried by spring hinges. The doors 3 may be opened from the outside, and carries contact springs 36. 37, respectively provided in the motor and lamp circuits and engaging contacts 38, 39. The other doors are capable of being opened from within the casing only, and lock automatically when closed. The projection opening in the front of the casing is provided with a hinged flap held open by an inflammable thread when the projector is in use, the motor 19 is covered by a shield 20, and the lamp chamber 17 has a flue 18 leading to the outside of the casing. A screen of toughened glass is provided between the lamp and the condenser. A motorcontrolling resistance 32, a main switch 31, and two switches operated by a single knob, and controlling the motor and lamp circuits, are provided on the casing. Fig. 7 shows the wiring connections between the parts referred to. A resistance 35 which is separate from the projector is included in the lamp circuit when the door 2 is open, and is short-circuited when the door is closed.
GB3262325A 1925-12-24 1925-12-24 Improvements in and relating to cinematograph projectors Expired GB249787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3262325A GB249787A (en) 1925-12-24 1925-12-24 Improvements in and relating to cinematograph projectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3262325A GB249787A (en) 1925-12-24 1925-12-24 Improvements in and relating to cinematograph projectors

Publications (1)

Publication Number Publication Date
GB249787A true GB249787A (en) 1926-04-01

Family

ID=10341490

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3262325A Expired GB249787A (en) 1925-12-24 1925-12-24 Improvements in and relating to cinematograph projectors

Country Status (1)

Country Link
GB (1) GB249787A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579281A (en) * 1949-09-14 1951-12-18 Tuck James Allen Electrically actuated slide projector with remote control
US3039022A (en) * 1954-11-05 1962-06-12 Arcy Ellis W D Motion picture projector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579281A (en) * 1949-09-14 1951-12-18 Tuck James Allen Electrically actuated slide projector with remote control
US3039022A (en) * 1954-11-05 1962-06-12 Arcy Ellis W D Motion picture projector

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