GB437970A - Improvements connected with the projection of coloured light and apparatus for use therewith - Google Patents

Improvements connected with the projection of coloured light and apparatus for use therewith

Info

Publication number
GB437970A
GB437970A GB1445634A GB1445634A GB437970A GB 437970 A GB437970 A GB 437970A GB 1445634 A GB1445634 A GB 1445634A GB 1445634 A GB1445634 A GB 1445634A GB 437970 A GB437970 A GB 437970A
Authority
GB
United Kingdom
Prior art keywords
screen
casing
lens
coloured light
compartment
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
GB1445634A
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.)
HAROLD LAURENCE TREDREE
Original Assignee
HAROLD LAURENCE TREDREE
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 HAROLD LAURENCE TREDREE filed Critical HAROLD LAURENCE TREDREE
Priority to GB1445634A priority Critical patent/GB437970A/en
Publication of GB437970A publication Critical patent/GB437970A/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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light

Abstract

437,970. Coloured light projectors. TREDREE, H. L., 116, Pembroke Road, Canton, Cardiff. May 14, 1934, No. 14456. [Classes 75 (iii) and 75 (iv)] A projector of coloured light comprises a casing divided into two compartments by a partition carrying a condenser lens, one compartment containing the light source and the other a multi-coloured rotatable screen and means for rotating the screen. In the form shown, a cylindrical casing 4 is divided by a partition 7 into two compartments 5, 6, the partition carrying a plano-convex lens 13 and a double-convex lens 14. The compartment 5 contains a bracket 10 which carries an electric lamp bulb 8 and a vertically adjustable reflector 11, whilst the compartment 6 contains a disc screen 15 substantially at the focus of the lens 14 and rotated by an induction motor 17. The casing 4 is provided with ventilators 29, its front wall 18 carries a double convex lens 19, and it is mounted on trunnions 20 and is locked in any desired position by means of a quadrant 22 engaged by a wing nut 23. The screen 15 may be rotated slowly and the changing coloured light may be mixed with yellowish light from a separate source. The Provisional Specification describes the casing 4 as rectangular and the lens 13 as concave.
GB1445634A 1934-05-14 1934-05-14 Improvements connected with the projection of coloured light and apparatus for use therewith Expired GB437970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1445634A GB437970A (en) 1934-05-14 1934-05-14 Improvements connected with the projection of coloured light and apparatus for use therewith

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1445634A GB437970A (en) 1934-05-14 1934-05-14 Improvements connected with the projection of coloured light and apparatus for use therewith

Publications (1)

Publication Number Publication Date
GB437970A true GB437970A (en) 1935-11-08

Family

ID=10041506

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1445634A Expired GB437970A (en) 1934-05-14 1934-05-14 Improvements connected with the projection of coloured light and apparatus for use therewith

Country Status (1)

Country Link
GB (1) GB437970A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579779A (en) * 1947-05-15 1951-12-25 Allgaier Earl Color vision testing device
GB2239938A (en) * 1990-01-15 1991-07-17 Pierce Harvey Peter Roger Variable colour spotlight

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579779A (en) * 1947-05-15 1951-12-25 Allgaier Earl Color vision testing device
GB2239938A (en) * 1990-01-15 1991-07-17 Pierce Harvey Peter Roger Variable colour spotlight
GB2239938B (en) * 1990-01-15 1993-06-16 Pearce Harvey Peter Roger Variable colour spotlight

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