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GB1213785A - Improved scanning system - Google Patents

Improved scanning system

Info

Publication number
GB1213785A
GB1213785A GB9429/69A GB942969A GB1213785A GB 1213785 A GB1213785 A GB 1213785A GB 9429/69 A GB9429/69 A GB 9429/69A GB 942969 A GB942969 A GB 942969A GB 1213785 A GB1213785 A GB 1213785A
Authority
GB
United Kingdom
Prior art keywords
turbine
air
braking current
braking
period
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
GB9429/69A
Inventor
Kenneth Victor Diprose
Arthur Stuart Forbes
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.)
Hancock and Co Engineers Ltd
Original Assignee
Hancock and Co Engineers 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 Hancock and Co Engineers Ltd filed Critical Hancock and Co Engineers Ltd
Priority to GB9429/69A priority Critical patent/GB1213785A/en
Priority to US843051A priority patent/US3614448A/en
Priority to FR707006097A priority patent/FR2033366B3/fr
Priority to JP45015168A priority patent/JPS4814994B1/ja
Priority to DE2008171A priority patent/DE2008171C3/en
Publication of GB1213785A publication Critical patent/GB1213785A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K11/00—Methods or arrangements for graph-reading or for converting the pattern of mechanical parameters, e.g. force or presence, into electrical signal
    • G06K11/02—Automatic curve followers, i.e. arrangements in which an exploring member or beam is forced to follow the curve
    • G06K11/04—Automatic curve followers, i.e. arrangements in which an exploring member or beam is forced to follow the curve using an auxiliary scanning pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
    • B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
    • B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
    • B23Q35/12—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means
    • B23Q35/127—Means for transforming movement of the feeler or the like into feed movement of tool or work involving electrical means using non-mechanical sensing
    • B23Q35/128—Sensing by using optical means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/0016—Control of angular speed of one shaft without controlling the prime mover
    • H02P29/0022—Controlling a brake between the prime mover and the load

Landscapes

  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Hardware Design (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Machine Tool Copy Controls (AREA)
  • Control Of Position Or Direction (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

1,213,785. 785. Automatic speed control. HANCOCK & CO (ENG.) Ltd. Feb.21, 1969, No.9429/69. Heading G3R. [Also in Division G1] In a method and apparatus for scanning an outline, an optical prism which is rotated by an air turbine 43 through blades 46 on which air is directed from inlets 47 under the control of a slide valve 105, has its speed held between desired limits by an induction braking coil 83 acting on a sleeve 84, the braking current being determined by a circuit using pulses generated by one of a number of further photo-cells 97 in response to the passage of a bore 99 conveying light from the source 35 controlling the length of the "off" period between the switching for a fixed period of a monostable multi-vibrator to its "on" condition. The braking current is thus applied for a greater or shorter time according to whether the turbine is running fast or slow.
GB9429/69A 1969-02-21 1969-02-21 Improved scanning system Expired GB1213785A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB9429/69A GB1213785A (en) 1969-02-21 1969-02-21 Improved scanning system
US843051A US3614448A (en) 1969-02-21 1969-07-18 Scanning system for following an outline
FR707006097A FR2033366B3 (en) 1969-02-21 1970-02-20
JP45015168A JPS4814994B1 (en) 1969-02-21 1970-02-21
DE2008171A DE2008171C3 (en) 1969-02-21 1970-02-21 Device for photoelectrically scanning a contour shown on a base

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9429/69A GB1213785A (en) 1969-02-21 1969-02-21 Improved scanning system

Publications (1)

Publication Number Publication Date
GB1213785A true GB1213785A (en) 1970-11-25

Family

ID=9871800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9429/69A Expired GB1213785A (en) 1969-02-21 1969-02-21 Improved scanning system

Country Status (5)

Country Link
US (1) US3614448A (en)
JP (1) JPS4814994B1 (en)
DE (1) DE2008171C3 (en)
FR (1) FR2033366B3 (en)
GB (1) GB1213785A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175390A (en) * 1985-05-14 1986-11-26 Coal Ind Probe for sensing outlines

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2180736B1 (en) * 1972-04-15 1977-04-29 Elektro Optik Gmbh & Co Kg
US3989385A (en) * 1974-09-16 1976-11-02 International Business Machines Corporation Part locating, mask alignment and mask alignment verification system
SU634702A1 (en) * 1974-10-24 1978-11-30 Институт Механики Машин Ан Грузинской Сср Photooptical sensor for automatic driving of tractor
JPS56103767A (en) * 1980-01-11 1981-08-19 Fujitsu Ltd Information reader
JPS59108244U (en) * 1983-01-10 1984-07-21 日産自動車株式会社 Washer type pressure sensor
US4754446A (en) * 1987-01-23 1988-06-28 General Electric Company Optical recording system using refracted write beam for erasing
US5191485A (en) * 1991-09-19 1993-03-02 Infographix, Inc. Prism for image rotation
DE4132025C2 (en) * 1991-09-26 1994-07-21 Hell Ag Linotype Beam deflector
US5296972A (en) * 1992-07-31 1994-03-22 Litton Systems, Inc. Non-polarizing image rotation apparatus and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933668A (en) * 1956-07-14 1960-04-19 Westinghouse Canada Ltd Electric motor control system and curve tracer
US3099748A (en) * 1961-05-23 1963-07-30 Sperry Rand Corp Ford Instr Co Photosensitive device for measuring rotation about a line of sight to the sun
US3207950A (en) * 1962-10-15 1965-09-21 Eaton Mfg Co Control for electrical coupling apparatus
US3275743A (en) * 1963-12-17 1966-09-27 Melpar Inc Wide angle television system utilizing optical fibers
US3350156A (en) * 1964-03-04 1967-10-31 Douglas P Adams Nomographic computer scanning means
US3404280A (en) * 1964-10-29 1968-10-01 Hancock & Co Eng Ltd Method and apparatus for following an outline on a substrate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2175390A (en) * 1985-05-14 1986-11-26 Coal Ind Probe for sensing outlines

Also Published As

Publication number Publication date
DE2008171A1 (en) 1970-12-23
DE2008171B2 (en) 1974-08-29
FR2033366A7 (en) 1970-12-04
US3614448A (en) 1971-10-19
JPS4814994B1 (en) 1973-05-11
DE2008171C3 (en) 1975-04-10
FR2033366B3 (en) 1973-06-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees