GB846771A - Improvements in or relating to oscillation generators - Google Patents

Improvements in or relating to oscillation generators

Info

Publication number
GB846771A
GB846771A GB2723657A GB2723657A GB846771A GB 846771 A GB846771 A GB 846771A GB 2723657 A GB2723657 A GB 2723657A GB 2723657 A GB2723657 A GB 2723657A GB 846771 A GB846771 A GB 846771A
Authority
GB
United Kingdom
Prior art keywords
photo
apertures
relating
cell
chopper
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
GB2723657A
Inventor
Arthur Mylne Adam
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB2723657A priority Critical patent/GB846771A/en
Publication of GB846771A publication Critical patent/GB846771A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Communication System (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

846,771. Photo-electric pulse generators. MARCONI'S WIRELESS TELEGRAPH CO. Ltd. June 12, 1958 [Aug. 29, 1957], No. 27236/57. Class 40(3). In a sinusoidal pulse generator in which a chopper is arranged between a light source 1 and a photo-cell 8, the chopper comprises a rotary disc 4 with tapered radial apertures 9 and a fixed mask 3 with tapered apertures, and the light from several apertures falls on the photo-cell 8 to increase the output.
GB2723657A 1957-08-29 1957-08-29 Improvements in or relating to oscillation generators Expired GB846771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2723657A GB846771A (en) 1957-08-29 1957-08-29 Improvements in or relating to oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2723657A GB846771A (en) 1957-08-29 1957-08-29 Improvements in or relating to oscillation generators

Publications (1)

Publication Number Publication Date
GB846771A true GB846771A (en) 1960-08-31

Family

ID=10256314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2723657A Expired GB846771A (en) 1957-08-29 1957-08-29 Improvements in or relating to oscillation generators

Country Status (1)

Country Link
GB (1) GB846771A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196279A (en) * 1962-06-12 1965-07-20 Control Company Inc Comp Photosensitive digital shaft encoder
US3553470A (en) * 1967-03-16 1971-01-05 Richards & Co Ltd George Apparatus for generating an approximation to a sine wave including a reading head with two spaced areas for scanning an optical grating
FR2216581A1 (en) * 1973-02-06 1974-08-30 Swiden Lennart
GB2264780A (en) * 1992-02-13 1993-09-08 Ilford Ltd Optical beam chopping system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196279A (en) * 1962-06-12 1965-07-20 Control Company Inc Comp Photosensitive digital shaft encoder
US3553470A (en) * 1967-03-16 1971-01-05 Richards & Co Ltd George Apparatus for generating an approximation to a sine wave including a reading head with two spaced areas for scanning an optical grating
FR2216581A1 (en) * 1973-02-06 1974-08-30 Swiden Lennart
GB2264780A (en) * 1992-02-13 1993-09-08 Ilford Ltd Optical beam chopping system

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