GB650731A - Darkroom lamp - Google Patents

Darkroom lamp

Info

Publication number
GB650731A
GB650731A GB20646/47A GB2064647A GB650731A GB 650731 A GB650731 A GB 650731A GB 20646/47 A GB20646/47 A GB 20646/47A GB 2064647 A GB2064647 A GB 2064647A GB 650731 A GB650731 A GB 650731A
Authority
GB
United Kingdom
Prior art keywords
july
differently
slide
coloured
group
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
GB20646/47A
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.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
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 Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Publication of GB650731A publication Critical patent/GB650731A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D17/00—Dark-room arrangements not provided for in the preceding groups; Portable dark-rooms

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

650,731. Colour screens. GEVAERT PHOTO-PRODUCTEN N.V. July 30, 1947, No. 20646. Convention date, July 31, 1946. Drawings to Specification. [Class 97 (i)] [Also in Group XI] In a dark-room lamp (see Group XI), employing a filter slide having differently-coloured filter area, the slide 6 comprises a support of synthetic plastic material, such as cellulose acetate, on which is positioned a dyed layer of gelatine film having the said differently-coloured areas.
GB20646/47A 1946-07-31 1947-07-30 Darkroom lamp Expired GB650731A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE650731X 1946-07-31

Publications (1)

Publication Number Publication Date
GB650731A true GB650731A (en) 1951-02-28

Family

ID=3876733

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20646/47A Expired GB650731A (en) 1946-07-31 1947-07-30 Darkroom lamp

Country Status (4)

Country Link
BE (1) BE466975A (en)
DE (1) DE811907C (en)
FR (1) FR949611A (en)
GB (1) GB650731A (en)

Also Published As

Publication number Publication date
DE811907C (en) 1951-08-23
BE466975A (en)
FR949611A (en) 1949-09-05

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