GB438679A - Improvements relating to epidiascopes - Google Patents

Improvements relating to epidiascopes

Info

Publication number
GB438679A
GB438679A GB2729034A GB2729034A GB438679A GB 438679 A GB438679 A GB 438679A GB 2729034 A GB2729034 A GB 2729034A GB 2729034 A GB2729034 A GB 2729034A GB 438679 A GB438679 A GB 438679A
Authority
GB
United Kingdom
Prior art keywords
epidiascopes
reflectors
improvements relating
area
sparkhill
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
GB2729034A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2729034A priority Critical patent/GB438679A/en
Publication of GB438679A publication Critical patent/GB438679A/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
    • G03B21/08—Projectors or projection-type viewers; Accessories therefor affording epidiascopic projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

438,679. Epidiascopes. ALDIS, A. C. W., Sara Hole Road, Sparkhill, Birmingham. Sept. 22, 1934, No. 27290. [Class 97 (i)] In an epidiascope, concave reflectors c, d are provided at front and rear of the lamp a and the area b to be illuminated, and one or more flat reflectors e, each reflecting light over the whole area b, is provided at each side. The reflectors e may be carried by sheet metal holders f secured by angle pieces g.
GB2729034A 1934-09-22 1934-09-22 Improvements relating to epidiascopes Expired GB438679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2729034A GB438679A (en) 1934-09-22 1934-09-22 Improvements relating to epidiascopes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2729034A GB438679A (en) 1934-09-22 1934-09-22 Improvements relating to epidiascopes

Publications (1)

Publication Number Publication Date
GB438679A true GB438679A (en) 1935-11-21

Family

ID=10257170

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2729034A Expired GB438679A (en) 1934-09-22 1934-09-22 Improvements relating to epidiascopes

Country Status (1)

Country Link
GB (1) GB438679A (en)

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