GB509108A - Improvements in and relating to photographic exposure meters - Google Patents

Improvements in and relating to photographic exposure meters

Info

Publication number
GB509108A
GB509108A GB30687/38A GB3068738A GB509108A GB 509108 A GB509108 A GB 509108A GB 30687/38 A GB30687/38 A GB 30687/38A GB 3068738 A GB3068738 A GB 3068738A GB 509108 A GB509108 A GB 509108A
Authority
GB
United Kingdom
Prior art keywords
cover
relating
exposure
oct
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
GB30687/38A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB509108A publication Critical patent/GB509108A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/4209—Photoelectric exposure meters for determining the exposure time in recording or reproducing
    • G01J1/4214—Photoelectric exposure meters for determining the exposure time in recording or reproducing specially adapted for view-taking apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

509,108. Exposure meters. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 24, 1938, No. 30687. Convention date, Oct. 23, 1937. [Class 98 (i)] [Also in Group XL] A photo - electric exposure meter 1 has a sliding cover 8, with an opening 9 in the front which, when extended, forms a hood for the light sensitive element, and when closed forms a cover for the scale of the meter. The cover may also carry scales for calculating exposure, and a hinged door 15, for the opening 9, having slits 16 therein. The cover and case are provided with stops to hold the cover in an open or closed position. Specification 439,774, [Group XL], is referred to.
GB30687/38A 1937-10-23 1938-10-24 Improvements in and relating to photographic exposure meters Expired GB509108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US509108XA 1937-10-23 1937-10-23

Publications (1)

Publication Number Publication Date
GB509108A true GB509108A (en) 1939-07-11

Family

ID=21968249

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30687/38A Expired GB509108A (en) 1937-10-23 1938-10-24 Improvements in and relating to photographic exposure meters

Country Status (1)

Country Link
GB (1) GB509108A (en)

Similar Documents

Publication Publication Date Title
GB509108A (en) Improvements in and relating to photographic exposure meters
GB481656A (en) Improvements in photo-electric exposure meters
GB520037A (en) Improvements in photographic photo-electric exposure meters
GB487065A (en) Improvements in and relating to photo-electric exposure meters
USD97827S (en) Design fob a photoelectric
GB541852A (en) Improvements in roll film cameras
GB522623A (en) Photoelectric exposure meter
GB529298A (en) Improvements in or relating to photographic shutters
ES45624U (en) Improved mailboxes (Machine-translation by Google Translate, not legally binding)
ES141577U (en) Picture with relief effect. (Machine-translation by Google Translate, not legally binding)
GB498462A (en) Improvements in prepayment mechanism for meters
GB323130A (en) Improvements in or relating to weighing apparatus
GB466684A (en) Improvements in or relating to roll film cameras with photoelectric exposure meters
GB404722A (en) Combination locking box
ES57700U (en) New device to measure densities and contrasts of photographic colors (Machine-translation by Google Translate, not legally binding)
GB483875A (en) Improvements in and relating to photographic cameras
ES39768U (en) Shield with display device (Machine-translation by Google Translate, not legally binding)
GB538979A (en) Improvements relating to manhole covers
GB314682A (en) Improvements in film-pack adapters or holders for photographic cameras
ES45102U (en) Notebook for writing and drawing (Machine-translation by Google Translate, not legally binding)
ES133787U (en) Envelope for presentation of inactinic glasses. (Machine-translation by Google Translate, not legally binding)
ES116056U (en) Case for stylographers. (Machine-translation by Google Translate, not legally binding)
GB805268A (en) Improvements in or relating to photographic transparency holders
ES130348U (en) Device for the display and distribution of hypodermic needles (Machine-translation by Google Translate, not legally binding)
GB526295A (en) Improvements in or relating to hinges for windows, fanlights and the like opening outwardly