GB997981A - Improvements in light meters - Google Patents

Improvements in light meters

Info

Publication number
GB997981A
GB997981A GB1110964A GB1110964A GB997981A GB 997981 A GB997981 A GB 997981A GB 1110964 A GB1110964 A GB 1110964A GB 1110964 A GB1110964 A GB 1110964A GB 997981 A GB997981 A GB 997981A
Authority
GB
United Kingdom
Prior art keywords
bertram
battery
march
switch
measuring circuit
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
GB1110964A
Other languages
English (en)
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
Publication of GB997981A publication Critical patent/GB997981A/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Secondary Cells (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
  • Battery Mounting, Suspending (AREA)
GB1110964A 1963-03-15 1964-03-16 Improvements in light meters Expired GB997981A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB71156A DE1184524B (de) 1963-03-15 1963-03-15 Belichtungsmesser

Publications (1)

Publication Number Publication Date
GB997981A true GB997981A (en) 1965-07-14

Family

ID=6976924

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1110964A Expired GB997981A (en) 1963-03-15 1964-03-16 Improvements in light meters

Country Status (5)

Country Link
BE (1) BE645277A (enrdf_load_stackoverflow)
CH (1) CH441801A (enrdf_load_stackoverflow)
DE (1) DE1184524B (enrdf_load_stackoverflow)
GB (1) GB997981A (enrdf_load_stackoverflow)
NL (1) NL6402788A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
DE1184524B (de) 1964-12-31
NL6402788A (enrdf_load_stackoverflow) 1964-09-16
CH441801A (de) 1967-08-15
BE645277A (enrdf_load_stackoverflow) 1964-07-16

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