GB817154A - Improvements in or relating to apparatus for detecting faulty sheet feeding - Google Patents

Improvements in or relating to apparatus for detecting faulty sheet feeding

Info

Publication number
GB817154A
GB817154A GB29843/55A GB2984355A GB817154A GB 817154 A GB817154 A GB 817154A GB 29843/55 A GB29843/55 A GB 29843/55A GB 2984355 A GB2984355 A GB 2984355A GB 817154 A GB817154 A GB 817154A
Authority
GB
United Kingdom
Prior art keywords
capacitor
circuit
oscillator
sheets
capacitors
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
GB29843/55A
Inventor
Daniel Broido
Colin Bernard Wilkins
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.)
International Computers and Tabulators Ltd
Original Assignee
International Computers and Tabulators Ltd
Filing date
Publication date
Application filed by International Computers and Tabulators Ltd filed Critical International Computers and Tabulators Ltd
Publication of GB817154A publication Critical patent/GB817154A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/01—Function indicators indicating an entity as a function of which control, adjustment or change is performed, i.e. input
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/02—Function indicators indicating an entity which is controlled, adjusted or changed by a control process, i.e. output
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2220/00—Function indicators
    • B65H2220/03—Function indicators indicating an entity which is measured, estimated, evaluated, calculated or determined but which does not constitute an entity which is adjusted or changed by the control process per se
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/52—Defective operating conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/50—Occurence
    • B65H2511/52—Defective operating conditions
    • B65H2511/524—Multiple articles, e.g. double feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1912—Banknotes, bills and cheques or the like

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

817,154. Feeding sheets. INTERNATIONAL COMPUTERS & TABULATORS Ltd., [formerly BRITISH TABULATING MACHINE CO. Ltd.]. Oct. 19, 1955, No. 29843/55. Class 100(1) Detecting faulty feed. Apparatus for detecting the passage of two or more superposed sheets along a feed path comprises a test capacitor, between the plates of which the sheets pass, connected to an electrical bridge circuit which is adapted to operate an alarm or control means if a predetermined degree of unbalance is effected therein due to the presence of two superposed sheets within the capacitor. Preferably, a comparison capacitor having a sheet therein, or in the path of a sheet which has passed the test capacitor, is also used in the circuit. The distance between the plates of the capacitors is adjustable by screw means. They are connected to the bridge circuit at TS and CS, respectively, by screened cables. The circuit comprises a normally quiescent oscillator VI and a normally non-conducting gas-filled valve THI which is triggered by operation of the oscillator in response to change in the capacitance of the capacitor TS. The anode circuit of valve VI includes coils 7, 8 and a capacitor 9: the H.T. supply from this circuit is decoupled by a choke 10 and capacitor 11. The coils 7, 8 are coupled to coils 12, 13 which, with variable capacitors 14, 15 form a bridge circuit connected to the central grid of the oscillator. The bridge is adjusted so that, with a single sheet in each of the capacitors in the feed path, the bridge is out of balance in one sense and the oscillator is held against oscillation. When the unbalance is reversed by the passage on two superposed sheets, the oscillator VI starts to oscillate, coil 18 receives an output which is rectified by a diode 19 and applied to the grid of the valve THI. The latter is fired, and a relay 24 in the anode circuit is energized to complete an alarm or control circuit (not shown). The relay 24 could cause an electromagnet clutch in the sheet-feeding apparatus to be disabled. In a modification, the comparison capacitor is replaced by a fixed capacitor. The positive supply voltage to the valve THI is controlled by cam-controlled contacts which are closed when the middle of the sheets lie between the plates of the two capacitors. Specification 751,931 [Group XIX] is referred to.
GB29843/55A 1955-10-19 Improvements in or relating to apparatus for detecting faulty sheet feeding Expired GB817154A (en)

Publications (1)

Publication Number Publication Date
GB817154A true GB817154A (en) 1959-07-22

Family

ID=1741807

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29843/55A Expired GB817154A (en) 1955-10-19 Improvements in or relating to apparatus for detecting faulty sheet feeding

Country Status (1)

Country Link
GB (1) GB817154A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021707A1 (en) * 1979-06-11 1981-01-07 Ncr Canada Ltd - Ncr Canada Ltee Multiple document detecting system and method of detecting multiple documents
EP0151808A3 (en) * 1984-01-03 1987-09-09 Atalla Corporation Improved currency-dispensing method and apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021707A1 (en) * 1979-06-11 1981-01-07 Ncr Canada Ltd - Ncr Canada Ltee Multiple document detecting system and method of detecting multiple documents
EP0151808A3 (en) * 1984-01-03 1987-09-09 Atalla Corporation Improved currency-dispensing method and apparatus

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