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GB670813A - Improvements in or relating to the cooling of optical projection apparatus - Google Patents

Improvements in or relating to the cooling of optical projection apparatus

Info

Publication number
GB670813A
GB670813A GB2771049A GB2771049A GB670813A GB 670813 A GB670813 A GB 670813A GB 2771049 A GB2771049 A GB 2771049A GB 2771049 A GB2771049 A GB 2771049A GB 670813 A GB670813 A GB 670813A
Authority
GB
United Kingdom
Prior art keywords
optical projection
projection apparatus
flue
nozzle
secured
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
GB2771049A
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.)
JAMES RUSSELL KENNEDY
Original Assignee
JAMES RUSSELL KENNEDY
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 JAMES RUSSELL KENNEDY filed Critical JAMES RUSSELL KENNEDY
Priority to GB2771049A priority Critical patent/GB670813A/en
Publication of GB670813A publication Critical patent/GB670813A/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
    • G03B21/16—Cooling; Preventing overheating

Landscapes

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

Abstract

670,813. Optical projection apparatus. KENNEDY, J. R., and ADAMTCHIK, M. T. Dec. 21, 1949 [Oct. 28, 1949], No. 27710/49. Class 97 (i). The apparatus is cooled by draught induced by a high-speed air jet or jets forced into the flue by an electrically-driven fan which may be of the centrifugal or axial flow type. The cooling unit shown is carried on a projector casing 17. The motor 1 is carried on streamlined radial arms 3 in a casing 4 and to its spindle 6 is secured, by a screw 8, the fan rotor 7 with aerofoil blades 9. The air flow passes fixed blades 10 on a hub 11, to which is secured a conical or paraboloidal fairing 12, into the nozzle 13. The nozzle is connected to an elbow 14 mounted in a pipe 15 surmounting the projector flue 16. A pivoted valve 18 regulates the induced air flow.
GB2771049A 1949-10-28 1949-10-28 Improvements in or relating to the cooling of optical projection apparatus Expired GB670813A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2771049A GB670813A (en) 1949-10-28 1949-10-28 Improvements in or relating to the cooling of optical projection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2771049A GB670813A (en) 1949-10-28 1949-10-28 Improvements in or relating to the cooling of optical projection apparatus

Publications (1)

Publication Number Publication Date
GB670813A true GB670813A (en) 1952-04-23

Family

ID=10264038

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2771049A Expired GB670813A (en) 1949-10-28 1949-10-28 Improvements in or relating to the cooling of optical projection apparatus

Country Status (1)

Country Link
GB (1) GB670813A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323875A1 (en) * 1983-07-02 1985-01-03 Demolux Gmbh & Co Kg, 6070 Langen Slide projector
DE10200373A1 (en) * 2001-08-29 2003-04-24 Acer Comm & Multimedia Inc Projector with a guide rib in an air duct

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3323875A1 (en) * 1983-07-02 1985-01-03 Demolux Gmbh & Co Kg, 6070 Langen Slide projector
DE10200373A1 (en) * 2001-08-29 2003-04-24 Acer Comm & Multimedia Inc Projector with a guide rib in an air duct

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