GB864071A - Improvements in or relating to photo-electric apparatus for measuring changes of light intensity or quantities which can be made to produce change in light intensity - Google Patents

Improvements in or relating to photo-electric apparatus for measuring changes of light intensity or quantities which can be made to produce change in light intensity

Info

Publication number
GB864071A
GB864071A GB612158A GB612158A GB864071A GB 864071 A GB864071 A GB 864071A GB 612158 A GB612158 A GB 612158A GB 612158 A GB612158 A GB 612158A GB 864071 A GB864071 A GB 864071A
Authority
GB
United Kingdom
Prior art keywords
light intensity
windings
photo
quantities
relating
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
GB612158A
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.)
PETER ANDREW EDWIN CROSSE
WILLIAM LIONEL SNOWSILL
Central Electricity Generating Board
Original Assignee
PETER ANDREW EDWIN CROSSE
WILLIAM LIONEL SNOWSILL
Central Electricity Generating Board
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 PETER ANDREW EDWIN CROSSE, WILLIAM LIONEL SNOWSILL, Central Electricity Generating Board filed Critical PETER ANDREW EDWIN CROSSE
Priority to GB612158A priority Critical patent/GB864071A/en
Publication of GB864071A publication Critical patent/GB864071A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

864,071. Control of A.C. motors. CENTRAL ELECTRICITY GENERATING BOARD, CROSSE, P. A. E., SNOWSILL, W. L., and LUCAS, D. H. May 25, 1959 [Feb. 25, 1958], No. 6121/58. Class 38 (3). [Also in Group XL (b)] Apparatus for measuring the density of dust deposited on a plate (see Group XL (b)) includes an A.C. motor 22 comprising two windings 22a and 22b. The lower ends of the windings are connected together and thence through a relay contact F3 and switches 36, 32 to one side 31 of the mains input; the other ends of the two windings are interconnected by a capacitor, the other end of one winding is directly connected to the other side 30 of the mains input and the other end of the other winding is connected to the other side 30 of the mains input through a resistor and capacitor in series, the connections to the upper ends of the windings being interchanged by relay contacts A3 and C3 causing the motor to reverse cyclically. The motor may be stalled by closing a relay contact G3 connected between the upper ends of the windings.
GB612158A 1958-02-25 1958-02-25 Improvements in or relating to photo-electric apparatus for measuring changes of light intensity or quantities which can be made to produce change in light intensity Expired GB864071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB612158A GB864071A (en) 1958-02-25 1958-02-25 Improvements in or relating to photo-electric apparatus for measuring changes of light intensity or quantities which can be made to produce change in light intensity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB612158A GB864071A (en) 1958-02-25 1958-02-25 Improvements in or relating to photo-electric apparatus for measuring changes of light intensity or quantities which can be made to produce change in light intensity

Publications (1)

Publication Number Publication Date
GB864071A true GB864071A (en) 1961-03-29

Family

ID=9808790

Family Applications (1)

Application Number Title Priority Date Filing Date
GB612158A Expired GB864071A (en) 1958-02-25 1958-02-25 Improvements in or relating to photo-electric apparatus for measuring changes of light intensity or quantities which can be made to produce change in light intensity

Country Status (1)

Country Link
GB (1) GB864071A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107885272A (en) * 2017-11-27 2018-04-06 昆明理工大学津桥学院 Card reader photoelectric sensor antidusting regulating circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107885272A (en) * 2017-11-27 2018-04-06 昆明理工大学津桥学院 Card reader photoelectric sensor antidusting regulating circuit
CN107885272B (en) * 2017-11-27 2023-12-19 昆明理工大学津桥学院 Photoelectric sensor dust-proof voltage regulating circuit for card reader

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