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

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)

Similar Documents

Publication Publication Date Title
GB438679A (en) Improvements relating to epidiascopes
GB468689A (en) Improvements in and relating to vehicle lamps
GB467411A (en) Improvements in or relating to lamps for shop window illumination
GB450076A (en) Improvements in reflectors
GB514947A (en) Improvements relating to reflectors
GB389677A (en) Improvements relating to illuminated signs and the like
AU101411B2 (en) Improvements in upcast lighting reflectors
GB486274A (en) Improvements in or relating to lamps for illuminating objects to be photographed
AU269936A (en) Improvements in upcast lighting reflectors
AU100177B2 (en) Improvements in lamp reflectors and lenses therefor
GB457805A (en) Improvements relating to reflecting signals
GB437597A (en) Improvements in or relating to lamps for velocipedes
GB414710A (en) Improvements in and relating to head lamps for vehicles
GB265913A (en) Improvements in luminous sign-boards
GB457595A (en) Improvements in or relating to head lamps for road vehicles and the like
AU41836A (en) Improvements in lamp reflectors and lenses therefor
GB377412A (en) Improvements in and relating to glareless lenses for vehicle headlights
GB397556A (en) Improvements relating to reflectors
GB270984A (en) Improvements in or relating to show cases, shop windows, or the like
GB398452A (en) Improvements in or relating to light reflectors
GB490238A (en) Improvements in reflectors
CA359525A (en) Rear lamp
GB415210A (en) Improvements relating to lamp reflectors
GB315336A (en) Improvements in advertising signs
GB432071A (en) Improvements in or relating to changeable signs