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 materialInfo
- 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
Links
- 230000003287 optical effect Effects 0.000 title 1
- 229920003023 plastic Polymers 0.000 abstract 1
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.
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) |
-
1962
- 1962-05-16 GB GB1878262A patent/GB969934A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE7308779L (en) | ||
GB1462504A (en) | Proximity sensors | |
DE3771785D1 (en) | BUBBLE DETECTOR FOR A LIQUID CIRCUIT. | |
GB1520693A (en) | Detecting lateral position of webs | |
GB1236342A (en) | Optically sensing motion | |
ES462609A1 (en) | Bi-axial scanning device for following the outline of a template | |
GB1124805A (en) | Light source scanning device for navigational apparatus | |
GB1156991A (en) | Photoelectric Position Measuring or Control Systems | |
GB911369A (en) | Improvements in or relating to automatic curve tracing devices | |
GB1463600A (en) | Apparatus for tracking a raised edge without shadow interference | |
GB969934A (en) | Improvements in optical comparators for use in edge guidance of web material | |
GB1439047A (en) | Optical sensing apparatus | |
GB1299214A (en) | Display instruments for aircraft | |
GB989904A (en) | Improvements relating to optical systems | |
GB1080106A (en) | Method of and apparatus for detecting lines on the surface of a travelling sheet | |
GB1523584A (en) | Apparatus for indicating angular displacement | |
GB1161917A (en) | Photoelectric Microscopes. | |
GB1125265A (en) | Record reader | |
JPS533305A (en) | Optical reproduction device | |
JPS5752805A (en) | Controlling device for position and attitude | |
GB1380537A (en) | Method of and apparatus for optical determination of spot positions | |
GB1292965A (en) | Edge control apparatus | |
FR2281996A1 (en) | Control unit for thin film deposition - uses optical system with light source and photo-receivers for reflected and transmitted light fractions | |
US3450882A (en) | Light sensitive center line tracking system | |
GB1341676A (en) | Line tracing apparatus |