GB727403A - Apparatus for reproducing with considerable mechanical power the movement of a beam of light - Google Patents

Apparatus for reproducing with considerable mechanical power the movement of a beam of light

Info

Publication number
GB727403A
GB727403A GB2159751A GB2159751A GB727403A GB 727403 A GB727403 A GB 727403A GB 2159751 A GB2159751 A GB 2159751A GB 2159751 A GB2159751 A GB 2159751A GB 727403 A GB727403 A GB 727403A
Authority
GB
United Kingdom
Prior art keywords
housing
light
cell
photo
slot
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
GB2159751A
Inventor
Robert Gibson
Gordon Hugh Thorndike
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.)
Wool Industries Research Association
Original Assignee
Wool Industries Research Association
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 Wool Industries Research Association filed Critical Wool Industries Research Association
Priority to GB2159751A priority Critical patent/GB727403A/en
Publication of GB727403A publication Critical patent/GB727403A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1409—Control of position or direction using feedback using an analogue comparing device with dc amplifier chain

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

727,403. Electric follow-up systems. WOOL INDUSTRIES RESEARCH ASSOCIATION. Sept. 24, 1952 [Sept. 14, 1951], No. 21597/51. Class 40 (1). [Also in Group XL (b)] The movement of a member is reproduced with increased mechanical power by a photoelectric cell which is mounted in a member which moves so as to follow the boundary of a beam of light reflected by the member. As shown, an image of a semi-circular mask 6 in front of a light source is projected by a mirror 5, the angular position of which is to be indicated, and lens 7 on to a housing 10 in which is mounted a photo-electric cell. A narrow slot 9 in the box allows light to reach the photo-cell. A light tunnel may be fitted in front of the slot to prevent entry of stray light. The housing carries a nut which is driven by a motor 17 driving a lead-screw 14 through known clutchoperated reversing mechanism 18. In operation the housing moves from right to left until the diameter of the semicircular image 8 enters the slot when the photo-cell operates through a known electronic circuit 19-to reverse the drive of lead-screw 14. Thus the housing 10 oscillates until the position of the image changes. The oscillations of the housing are not transmitted to pen 22 because of lost-motion between a block 20 on which the pin is mounted and guidebars 26 carried by the housing. In a modification the light beam may be of a width greater than the length of the slit, its intensity varying in the direction of deflection or the light beam may vary in width in this direction. Feed-back of the output signal to the mechanism moving the light beam is possible.
GB2159751A 1951-09-14 1951-09-14 Apparatus for reproducing with considerable mechanical power the movement of a beam of light Expired GB727403A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2159751A GB727403A (en) 1951-09-14 1951-09-14 Apparatus for reproducing with considerable mechanical power the movement of a beam of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2159751A GB727403A (en) 1951-09-14 1951-09-14 Apparatus for reproducing with considerable mechanical power the movement of a beam of light

Publications (1)

Publication Number Publication Date
GB727403A true GB727403A (en) 1955-03-30

Family

ID=10165599

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2159751A Expired GB727403A (en) 1951-09-14 1951-09-14 Apparatus for reproducing with considerable mechanical power the movement of a beam of light

Country Status (1)

Country Link
GB (1) GB727403A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515935A1 (en) * 1981-11-06 1983-05-13 Bat Cigarettenfab Gmbh METHOD FOR RECOGNIZING THE COMBUSTION LINE OF THE ENVELOPE OF A SMOKING ARTICLE AND DEVICE FOR IMPLEMENTING SAID METHOD

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515935A1 (en) * 1981-11-06 1983-05-13 Bat Cigarettenfab Gmbh METHOD FOR RECOGNIZING THE COMBUSTION LINE OF THE ENVELOPE OF A SMOKING ARTICLE AND DEVICE FOR IMPLEMENTING SAID METHOD

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