GB276745A - Improvements in stroboscopic apparatus - Google Patents

Improvements in stroboscopic apparatus

Info

Publication number
GB276745A
GB276745A GB1408226A GB1408226A GB276745A GB 276745 A GB276745 A GB 276745A GB 1408226 A GB1408226 A GB 1408226A GB 1408226 A GB1408226 A GB 1408226A GB 276745 A GB276745 A GB 276745A
Authority
GB
United Kingdom
Prior art keywords
observation
shutters
speed
time
determining
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
GB1408226A
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
Priority to GB1408226A priority Critical patent/GB276745A/en
Publication of GB276745A publication Critical patent/GB276745A/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
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • G01P3/40—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light using stroboscopic means

Abstract

276,745. Ashdown, A. J. June 3, 1926. Stroboscopic apparatus. - In order to reduce the observation period in stroboscopic apparatus without at the same time reducing the time of the eclipse period, the speed factor determining the frequency of observation is different from that determining the length of time of each observation. A pair of shutters, arranged across the line of vision, is used, both moving simultaneously and preferably in the same direction, the speed of one being greater than the speed of the other. In one form a pair of concentric sleeve like shutters a, b are utilized having apertures a<1>, b<1>, so arranged that they coincide on the line of vision at intervals during rotation. The inner shutter is rotated at a lower speed than the outer shutter, and determines the frequency of observation, the outer shutter determining the length of time of the observation. The inner shutter is geared to the outer shutter by gearing c the ratio of which may be changed, or the two shutters may be driven independently- In another form the shutters consist of apertured discs. Specification 228,577 is referred to.
GB1408226A 1926-06-03 1926-06-03 Improvements in stroboscopic apparatus Expired GB276745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1408226A GB276745A (en) 1926-06-03 1926-06-03 Improvements in stroboscopic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1408226A GB276745A (en) 1926-06-03 1926-06-03 Improvements in stroboscopic apparatus

Publications (1)

Publication Number Publication Date
GB276745A true GB276745A (en) 1927-09-05

Family

ID=10034651

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1408226A Expired GB276745A (en) 1926-06-03 1926-06-03 Improvements in stroboscopic apparatus

Country Status (1)

Country Link
GB (1) GB276745A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486406A (en) * 1944-07-11 1949-11-01 Higonnet Rene Photographic type composing machine having stroboscopic character scanning system
US3135819A (en) * 1961-02-02 1964-06-02 Sanborn Company Shutter calibrating system
GB2191305A (en) * 1986-06-05 1987-12-09 British Aerospace Optical apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486406A (en) * 1944-07-11 1949-11-01 Higonnet Rene Photographic type composing machine having stroboscopic character scanning system
US3135819A (en) * 1961-02-02 1964-06-02 Sanborn Company Shutter calibrating system
GB2191305A (en) * 1986-06-05 1987-12-09 British Aerospace Optical apparatus

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