GB1363156A - Scanning apparatus - Google Patents

Scanning apparatus

Info

Publication number
GB1363156A
GB1363156A GB5469171A GB5469171A GB1363156A GB 1363156 A GB1363156 A GB 1363156A GB 5469171 A GB5469171 A GB 5469171A GB 5469171 A GB5469171 A GB 5469171A GB 1363156 A GB1363156 A GB 1363156A
Authority
GB
United Kingdom
Prior art keywords
document
signal
motion
velocity
scanned
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
GB5469171A
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.)
Fujitsu Services Ltd
Original Assignee
Fujitsu Services 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 Fujitsu Services Ltd filed Critical Fujitsu Services Ltd
Priority to GB5469171A priority Critical patent/GB1363156A/en
Priority to ZA727683A priority patent/ZA727683B/en
Priority to AU48428/72A priority patent/AU464578B2/en
Priority to FR7241921A priority patent/FR2163085A5/fr
Priority to DE2257781A priority patent/DE2257781C3/en
Priority to US380955A priority patent/US3883737A/en
Publication of GB1363156A publication Critical patent/GB1363156A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/35—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
    • H03K3/351—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region the devices being unijunction transistors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/10—Image acquisition

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Control Of Linear Motors (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

1363156 Generating pulse trains INTERNATIONAL COMPUTERS Ltd 31 Oct 1972 [25 Nov 1971] 54691/71 Heading G4H [Also in Division H4] Apparatus comprises means for moving a member at a variable velocity, e.g. in simple harmonic motion, and means responsive to the velocity of the member to generate a train of clock pulses, the time intervals between successive clock pulses in the train being varied to correspond to a succession of substantially equal increments of movement during the motion. As described, means for scanning a document, Fig. 1 (not shown), by means of a lens assembly (2) which directs an image of a portion of a document (15) on to an array of photodiodes (4) comprises an electrical vibrator (1) which causes the lens assembly to perform harmonic motion above the document, whereby characters may be scanned by the diode array. A coil 19 is attached to the shaft (17), (18) moved by the vibrator and is arranged between the poles of a permanent magnet (20) so that an A.C. signal is generated in the coil having a waveform corresponding to that of the velocity of motion. This signal is amplified at 6 and rectified at 7 so that only parts of the signal corresponding to scanning movements in a first sense are used. The signal is then passed to a controlled pulse generator 8 where it is used to charge a capacitor 10 connected between the base and drain of F.E.T. 12. Whenever the voltage at 10 reaches a certain level the F.E.T. conducts to emit a pulse to a distributer 9 and to discharge tha capacitor 10. The pulses are used to sample in the output from the diode array (4) and are thus timed to occur after equal increments of the document have been scanned.
GB5469171A 1971-07-01 1971-11-25 Scanning apparatus Expired GB1363156A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB5469171A GB1363156A (en) 1971-11-25 1971-11-25 Scanning apparatus
ZA727683A ZA727683B (en) 1971-11-25 1972-10-30 Improvements in or relating to clock pulse generators
AU48428/72A AU464578B2 (en) 1971-11-25 1972-11-01 Improvements in or relating to clock pulse generators
FR7241921A FR2163085A5 (en) 1971-11-25 1972-11-24
DE2257781A DE2257781C3 (en) 1971-11-25 1972-11-24 Clock pulse generator
US380955A US3883737A (en) 1971-07-01 1973-07-20 Circuits for the generation of clock pulses for use with a scanning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5469171A GB1363156A (en) 1971-11-25 1971-11-25 Scanning apparatus

Publications (1)

Publication Number Publication Date
GB1363156A true GB1363156A (en) 1974-08-14

Family

ID=10471797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5469171A Expired GB1363156A (en) 1971-07-01 1971-11-25 Scanning apparatus

Country Status (5)

Country Link
AU (1) AU464578B2 (en)
DE (1) DE2257781C3 (en)
FR (1) FR2163085A5 (en)
GB (1) GB1363156A (en)
ZA (1) ZA727683B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH376694A (en) * 1959-08-17 1964-04-15 Hasler Ag Device for reading characters located on a character carrier with the generation of corresponding electrical pulses
NL254964A (en) * 1959-08-17
US3258581A (en) * 1961-12-08 1966-06-28 Chrysler Corp Character recognition system
US3437394A (en) * 1966-07-26 1969-04-08 Nasa Electromagnetic mirror drive system
GB1159416A (en) * 1968-07-10 1969-07-23 John Lionel Feaver Improved Magnetic Tachometer
DE1962563A1 (en) * 1969-12-13 1971-06-16 Bosch Gmbh Robert Tachometer that responds quickly to changes in speed

Also Published As

Publication number Publication date
AU464578B2 (en) 1975-08-28
FR2163085A5 (en) 1973-07-20
AU4842872A (en) 1974-05-02
ZA727683B (en) 1973-06-27
DE2257781C3 (en) 1984-10-18
DE2257781A1 (en) 1973-05-30
DE2257781B2 (en) 1980-10-16

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee