GB1247975A - Improvements in or relating to apparatus, e.g. for determining the position of a movable member, and method of using same - Google Patents

Improvements in or relating to apparatus, e.g. for determining the position of a movable member, and method of using same

Info

Publication number
GB1247975A
GB1247975A GB47006/69A GB4700669A GB1247975A GB 1247975 A GB1247975 A GB 1247975A GB 47006/69 A GB47006/69 A GB 47006/69A GB 4700669 A GB4700669 A GB 4700669A GB 1247975 A GB1247975 A GB 1247975A
Authority
GB
United Kingdom
Prior art keywords
relating
determining
same
movable member
cylinder
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
GB47006/69A
Inventor
Eric Warren
Clifford Roy Amsbury
John Watson Hill
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB47006/69A priority Critical patent/GB1247975A/en
Publication of GB1247975A publication Critical patent/GB1247975A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses
    • G01D5/38—Forming the light into pulses by diffraction gratings
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/22—Analogue/digital converters pattern-reading type

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)

Abstract

1,247,975. Selective signalling. ROLLSROYCE Ltd. 24 Sept., 1969, No. 47006/69. Addition to 1,138,082. Heading G4H. The system described in the parent Specification in which light is directed diametrically through a hollow transparent cylinder carrying a uniform pattern of marks is modified in that a light fibre is positioned diametrically within the cylinder in the direction of the light beam in order to assist its passage without dispersion across the cylinder.
GB47006/69A 1969-09-24 1969-09-24 Improvements in or relating to apparatus, e.g. for determining the position of a movable member, and method of using same Expired GB1247975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB47006/69A GB1247975A (en) 1969-09-24 1969-09-24 Improvements in or relating to apparatus, e.g. for determining the position of a movable member, and method of using same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB47006/69A GB1247975A (en) 1969-09-24 1969-09-24 Improvements in or relating to apparatus, e.g. for determining the position of a movable member, and method of using same

Publications (1)

Publication Number Publication Date
GB1247975A true GB1247975A (en) 1971-09-29

Family

ID=10443377

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47006/69A Expired GB1247975A (en) 1969-09-24 1969-09-24 Improvements in or relating to apparatus, e.g. for determining the position of a movable member, and method of using same

Country Status (1)

Country Link
GB (1) GB1247975A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0297482A2 (en) * 1987-06-29 1989-01-04 Honeywell Inc. Rotary position encoder
EP0439804A2 (en) * 1989-12-26 1991-08-07 Canon Kabushiki Kaisha Rotation detecting apparatus
US5323001A (en) * 1989-12-26 1994-06-21 Canon Kabushiki Kaisha Rotary encoder with scale member and interference of zero and first order diffraction beam
US5369271A (en) * 1992-03-13 1994-11-29 Canon Kabushiki Kaisha Rotation detector using dual position interference light

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0297482A2 (en) * 1987-06-29 1989-01-04 Honeywell Inc. Rotary position encoder
EP0297482A3 (en) * 1987-06-29 1991-10-16 Honeywell Inc. Rotary position encoder
EP0439804A2 (en) * 1989-12-26 1991-08-07 Canon Kabushiki Kaisha Rotation detecting apparatus
EP0439804A3 (en) * 1989-12-26 1993-03-03 Canon Kabushiki Kaisha Rotary encoder
US5323001A (en) * 1989-12-26 1994-06-21 Canon Kabushiki Kaisha Rotary encoder with scale member and interference of zero and first order diffraction beam
US5369271A (en) * 1992-03-13 1994-11-29 Canon Kabushiki Kaisha Rotation detector using dual position interference light

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