GB1097528A - Optical tachometer - Google Patents

Optical tachometer

Info

Publication number
GB1097528A
GB1097528A GB3079065A GB3079065A GB1097528A GB 1097528 A GB1097528 A GB 1097528A GB 3079065 A GB3079065 A GB 3079065A GB 3079065 A GB3079065 A GB 3079065A GB 1097528 A GB1097528 A GB 1097528A
Authority
GB
United Kingdom
Prior art keywords
photo
light
rotary member
july
transistor
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
GB3079065A
Inventor
Boris Victorien Barlow
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.)
Smiths Group PLC
Original Assignee
Smiths Group 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 Smiths Group PLC filed Critical Smiths Group PLC
Priority to GB3079065A priority Critical patent/GB1097528A/en
Publication of GB1097528A publication Critical patent/GB1097528A/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)
  • Length Measuring Devices By Optical Means (AREA)
  • Optical Transform (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1,097,528. Photo-electric tachometers. SMITHS INDUSTRIES Ltd. July 15, 1966 [July 20, 1965], No. 30790/65. Heading G1A. Apparatus for measuring the rate of rotation of a rotary member by measuring the frequency of pulses produced by a photo-cell receiving light from the surface of the member comprises two triangular prisms 6, 7, the bases of which cooperate respectively with a lamp 12 and phototransistor 14 so that light from lamp 12 leaving surface 10 is reflected from the rotary member through the surface 11 to the photo-transistor. The light is kept within the respective prisms by internal reflection and a shield 16 prevents entry of stray light. A clip 19 holds the parts together. The rotary member may carry a plurality of mirrors or be of polished steel with black marks thereon. The photo-transistor may be replaced by a photo-emissive or photo-conductive cell.
GB3079065A 1965-07-20 1965-07-20 Optical tachometer Expired GB1097528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3079065A GB1097528A (en) 1965-07-20 1965-07-20 Optical tachometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3079065A GB1097528A (en) 1965-07-20 1965-07-20 Optical tachometer

Publications (1)

Publication Number Publication Date
GB1097528A true GB1097528A (en) 1968-01-03

Family

ID=10313168

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3079065A Expired GB1097528A (en) 1965-07-20 1965-07-20 Optical tachometer

Country Status (1)

Country Link
GB (1) GB1097528A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093853A (en) * 1976-03-05 1978-06-06 Associated Engineering Limited Rotational speed transducers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093853A (en) * 1976-03-05 1978-06-06 Associated Engineering Limited Rotational speed transducers

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