GB956636A - Improvements in or relating to apparatus for determining variations in width of travelling transparent birefringent film - Google Patents

Improvements in or relating to apparatus for determining variations in width of travelling transparent birefringent film

Info

Publication number
GB956636A
GB956636A GB1625362A GB1625362A GB956636A GB 956636 A GB956636 A GB 956636A GB 1625362 A GB1625362 A GB 1625362A GB 1625362 A GB1625362 A GB 1625362A GB 956636 A GB956636 A GB 956636A
Authority
GB
United Kingdom
Prior art keywords
film
polarising means
light
photo
electric
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
GB1625362A
Inventor
John Laurence Linsley-Hood
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.)
British Cellophane Ltd
Original Assignee
British Cellophane 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 British Cellophane Ltd filed Critical British Cellophane Ltd
Priority to GB1625362A priority Critical patent/GB956636A/en
Priority to DEB71693A priority patent/DE1276335B/en
Publication of GB956636A publication Critical patent/GB956636A/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
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving
    • G01B11/046—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving for measuring width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
    • B65H2557/50—Use of particular electromagnetic waves, e.g. light, radiowaves or microwaves
    • B65H2557/516—Polarized light

Abstract

956,636. Electric selective signalling. BRITISH CELLOPHANE Ltd. March 28,1963 [April 27, 1962], No. 16253/62. Heading G4H. Apparatus for determining variations in the width of a travelling birefringent film 2, Fig. 1, comprises two edge detecting heads 1 and 1<SP>1</SP>, one for each edge of the film, and a signal integration 8 for summing signals received from both heads, each detecting head, Fig. 2, including a light source 9, a first polarising means 11, for plane polarising light emitted from the light source, a second polarising means 19 so orientated that it extinguishes light passing directly from the first polarising means, at least two photo-electric cells 13 capable of being activated by light passing through the second polarising means, and spaced apart in a direction transverse to the direction of travel of the film 2, the first and second polarising means being separated to provide a passage way through which a film edge may travel and intersect the light passing from the first polarising means to the second polarising means and each photo-electric cell being connected to the integrator so that when the cell is activated by light a signal is conveyed to the signal integration. In the embodiment shown four festoon-type lamps are used as the light source and thirty-two photo-electric cells are used, arranged in eight rows of four, transverse to the direction of travel of the film, with each row staggered (Fig. 3,) with respect to adjacent rows. Each photo-electric cell is connected between positive and negative voltage sources 21 and 22 Fig. 4, via a load resistor 23. Each load resistor controls the grid potential of a gas filled triode trigger valve 20, each valve having its cathode connected to one end of a recording ammeter 8. As the film 2 passes between the source and the cells it causes the light passing through it to be elliptically polarised, which light is then passed by the second polarising means 19 to activate a number of cells representing the degree of insertion of the film into the detector heads. Each cell so energized causes a potential rise across its load resistor 23 and trigger its associated valve 20. A current is thus passed through, and recorded by the ammeter 8, representative of the width of the film 2. Specification 627,228 is referred to.
GB1625362A 1962-04-27 1962-04-27 Improvements in or relating to apparatus for determining variations in width of travelling transparent birefringent film Expired GB956636A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1625362A GB956636A (en) 1962-04-27 1962-04-27 Improvements in or relating to apparatus for determining variations in width of travelling transparent birefringent film
DEB71693A DE1276335B (en) 1962-04-27 1963-04-27 Arrangement for measuring variations in width of a moving transparent birefringent film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1625362A GB956636A (en) 1962-04-27 1962-04-27 Improvements in or relating to apparatus for determining variations in width of travelling transparent birefringent film

Publications (1)

Publication Number Publication Date
GB956636A true GB956636A (en) 1964-04-29

Family

ID=10073980

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1625362A Expired GB956636A (en) 1962-04-27 1962-04-27 Improvements in or relating to apparatus for determining variations in width of travelling transparent birefringent film

Country Status (2)

Country Link
DE (1) DE1276335B (en)
GB (1) GB956636A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424915A (en) * 1966-06-07 1969-01-28 Ampex Photoelectric loop length detector with optical biasing means for the photocells
US3541437A (en) * 1966-10-31 1970-11-17 Mas Fab Eduard Kuesters Apparatus for determining the lateral deviation from the center of a breadth passing a machine
US3619626A (en) * 1969-03-17 1971-11-09 United States Steel Corp Digital edge position detector
US4417817A (en) * 1980-06-19 1983-11-29 General Mining Union Corporation, Limited Volumetric measurement of particles
US5932888A (en) * 1995-02-24 1999-08-03 Koenig & Bauer-Albert Aktiengesellschaft Web or sheet edge position measurement process and device
WO2000047947A1 (en) * 1999-02-10 2000-08-17 Nexpress Llc System for measuring the position of an edge of a transparent article
DE10035249A1 (en) * 2000-07-20 2002-01-31 Nexpress Solutions Llc Device for detecting the position of an edge of a transparent material, web edge control and printing machine
US6734449B2 (en) 2001-11-20 2004-05-11 Nexpress Solutions Llc Device for detecting the location of an edge of a transparent material, web edge control and printing press
GB2400653A (en) * 2003-02-24 2004-10-20 Weatherford Lamb Method and system for determining and controlling position of a valve

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2040084C3 (en) * 1970-08-12 1981-10-22 Mitsubishi Denki K.K., Tokyo Photoelectric measuring and control device for actuating a cutting device for cutting off a flat rolled material guided through a rolling train
DE3742527A1 (en) * 1987-07-21 1989-06-22 Mannesmann Ag Photoelectric sensing or measuring device
DE8717574U1 (en) * 1987-11-24 1989-07-27 I.F.S. Ingenieurgesellschaft Fuer Steuerungs- Und Systemtechnik Mbh, 1000 Berlin, De

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2237811A (en) * 1940-07-13 1941-04-08 Gen Electric Strip width indicating device
US2474906A (en) * 1945-08-03 1949-07-05 Du Pont Polarized light system for determining variations in the width of a web of transparent film
GB627228A (en) * 1945-08-03 1949-08-03 British Cellophane Ltd Improvements in or relating to apparatus for gauging film width variation of a continuous length of transparent birefringent film of artificial organic material
DE1780803U (en) * 1958-07-23 1959-01-08 Leitz Ernst Gmbh DEVICE FOR READING A SCALE.

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424915A (en) * 1966-06-07 1969-01-28 Ampex Photoelectric loop length detector with optical biasing means for the photocells
US3541437A (en) * 1966-10-31 1970-11-17 Mas Fab Eduard Kuesters Apparatus for determining the lateral deviation from the center of a breadth passing a machine
US3619626A (en) * 1969-03-17 1971-11-09 United States Steel Corp Digital edge position detector
US4417817A (en) * 1980-06-19 1983-11-29 General Mining Union Corporation, Limited Volumetric measurement of particles
US5932888A (en) * 1995-02-24 1999-08-03 Koenig & Bauer-Albert Aktiengesellschaft Web or sheet edge position measurement process and device
WO2000047947A1 (en) * 1999-02-10 2000-08-17 Nexpress Llc System for measuring the position of an edge of a transparent article
DE10035249A1 (en) * 2000-07-20 2002-01-31 Nexpress Solutions Llc Device for detecting the position of an edge of a transparent material, web edge control and printing machine
US6734449B2 (en) 2001-11-20 2004-05-11 Nexpress Solutions Llc Device for detecting the location of an edge of a transparent material, web edge control and printing press
GB2400653A (en) * 2003-02-24 2004-10-20 Weatherford Lamb Method and system for determining and controlling position of a valve
GB2400653B (en) * 2003-02-24 2006-04-12 Weatherford Lamb Method and system for determining and controlling position of a valve
US7195033B2 (en) 2003-02-24 2007-03-27 Weatherford/Lamb, Inc. Method and system for determining and controlling position of valve

Also Published As

Publication number Publication date
DE1276335B (en) 1968-08-29

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