GB894573A - Improvements in or relating to a method and apparatus for determining variations in linear dimensions - Google Patents

Improvements in or relating to a method and apparatus for determining variations in linear dimensions

Info

Publication number
GB894573A
GB894573A GB1939957A GB1939957A GB894573A GB 894573 A GB894573 A GB 894573A GB 1939957 A GB1939957 A GB 1939957A GB 1939957 A GB1939957 A GB 1939957A GB 894573 A GB894573 A GB 894573A
Authority
GB
United Kingdom
Prior art keywords
rod
disc
spacing
june
meter
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
GB1939957A
Inventor
Edward Howard Robinson
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1939957A priority Critical patent/GB894573A/en
Publication of GB894573A publication Critical patent/GB894573A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters

Abstract

894,573. Determining dimensions photoelectrically. ELECTRIC & MUSICAL INDUSTRIES Ltd. June 20, 1958 [June 20, 1957], No. 19399/57. Class 40(3). In apparatus for determining variations in linear dimensions, e.g. the diameter of a moving rod, the rod 8 is scanned by light beams produced by a rotating disc 3 having a circle of holes 6 or spaced transparent sectors, the light passing the rod falling on a photo-cell 12 connected to a meter 15 via a capacitor 14 and amplifier 13. The spacing of the light beams is varied until the reading of the meter 15 is a minimum when the spacing is equal to the rod diameter. The spacing may be varied by moving the condenser lens system 2 and projection lens 7 or by interposing an adjustable disc with a spiral slot. In a modification, several circles of holes are provided in the disc 3. In another modification, the lamp 1 and disc 3 are replaced by a cathode ray tube with scanning beams.
GB1939957A 1957-06-20 1957-06-20 Improvements in or relating to a method and apparatus for determining variations in linear dimensions Expired GB894573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1939957A GB894573A (en) 1957-06-20 1957-06-20 Improvements in or relating to a method and apparatus for determining variations in linear dimensions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1939957A GB894573A (en) 1957-06-20 1957-06-20 Improvements in or relating to a method and apparatus for determining variations in linear dimensions

Publications (1)

Publication Number Publication Date
GB894573A true GB894573A (en) 1962-04-26

Family

ID=10128714

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1939957A Expired GB894573A (en) 1957-06-20 1957-06-20 Improvements in or relating to a method and apparatus for determining variations in linear dimensions

Country Status (1)

Country Link
GB (1) GB894573A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620629A (en) * 1968-06-12 1971-11-16 Ti Group Services Ltd Optical gauges
US4461569A (en) * 1982-01-07 1984-07-24 The Electron Machine Corporation Concentricity gage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3620629A (en) * 1968-06-12 1971-11-16 Ti Group Services Ltd Optical gauges
US4461569A (en) * 1982-01-07 1984-07-24 The Electron Machine Corporation Concentricity gage

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