GB969934A - Improvements in optical comparators for use in edge guidance of web material - Google Patents

Improvements in optical comparators for use in edge guidance of web material

Info

Publication number
GB969934A
GB969934A GB1878262A GB1878262A GB969934A GB 969934 A GB969934 A GB 969934A GB 1878262 A GB1878262 A GB 1878262A GB 1878262 A GB1878262 A GB 1878262A GB 969934 A GB969934 A GB 969934A
Authority
GB
United Kingdom
Prior art keywords
edge
photo
cell
lamp
fed
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
GB1878262A
Inventor
George Frederick Urry
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.)
WALL PAPER MANUFACTURERS Ltd
Original Assignee
WALL PAPER MANUFACTURERS 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 WALL PAPER MANUFACTURERS Ltd filed Critical WALL PAPER MANUFACTURERS Ltd
Priority to GB1878262A priority Critical patent/GB969934A/en
Publication of GB969934A publication Critical patent/GB969934A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01D5/342—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 the sensed object being the obturating part

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Controlling Sheets Or Webs (AREA)

Abstract

969,934. Automatic control of position. WALL PAPER MANUFACTURERS Ltd. May 15, 1963 [May 16, 1962], No.18782/62. Heading G3R. [Also in Division G1] In an arrangement for the lateral control of the edge of a moving web B, the light-beam from a lamp 1 is alternatively directed on to a photo-cell 4, by a rotating prism 2, through a transparent plastic reference tube 3 or past the edge of the web B which partially obscures the light beam. The pulsating output from the photo-cell is fed through an amplifier 5 to switches 18, 21 alternatively gated by reference and edge signal selecting pulses derived from the output of a photo-cell 9, responsive to a lamp 8, through a phase-splitter 12. The selected reference and edge signal pulses are rectified and filtered in circuits 19, 22 to derive signals which are fed through emitter followers 20, 23 and compared in an error meter 24. The error signal is employed to operate, a servo-mechanism maintaining the edge B in a central or datum position.
GB1878262A 1962-05-16 1962-05-16 Improvements in optical comparators for use in edge guidance of web material Expired GB969934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1878262A GB969934A (en) 1962-05-16 1962-05-16 Improvements in optical comparators for use in edge guidance of web material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1878262A GB969934A (en) 1962-05-16 1962-05-16 Improvements in optical comparators for use in edge guidance of web material

Publications (1)

Publication Number Publication Date
GB969934A true GB969934A (en) 1964-09-16

Family

ID=10118334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1878262A Expired GB969934A (en) 1962-05-16 1962-05-16 Improvements in optical comparators for use in edge guidance of web material

Country Status (1)

Country Link
GB (1) GB969934A (en)

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