GB750268A - Means for evaluating electro-conductive marks on statistical record cards - Google Patents

Means for evaluating electro-conductive marks on statistical record cards

Info

Publication number
GB750268A
GB750268A GB2920/54A GB292054A GB750268A GB 750268 A GB750268 A GB 750268A GB 2920/54 A GB2920/54 A GB 2920/54A GB 292054 A GB292054 A GB 292054A GB 750268 A GB750268 A GB 750268A
Authority
GB
United Kingdom
Prior art keywords
brushes
marks
card
record cards
statistical record
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
GB2920/54A
Inventor
Walter Scheerer
Fritz Raeck
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 Business Machines Corp
Original Assignee
International Business Machines Corp
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
Priority to DEI5571A priority Critical patent/DE923095C/en
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to GB2920/54A priority patent/GB750268A/en
Publication of GB750268A publication Critical patent/GB750268A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

750,268. Statistical apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 1, 1954, No. 2920/54. Class 106 (1). Apparatus for sensing electro-conductive marks on a record card comprises two brushes located directly one behind the other in line with the direction of the card column as shown in Fig. 4. The pair of brushes may be staggered slightly to accommodate marks made slightly oblique as shown in Fig. 3. An insulating spacer may be inserted between the brushes if required as shown in Fig. 5. The invention is stated to be an improvement on the prior use of three brushes as shown in Fig. 2 in that less width per column is required and the total data bearing area of the card may be correspondingly increased.
GB2920/54A 1952-02-29 1954-02-01 Means for evaluating electro-conductive marks on statistical record cards Expired GB750268A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEI5571A DE923095C (en) 1952-02-29 1952-02-29 Arrangement for evaluating conductive markings
GB2920/54A GB750268A (en) 1954-02-01 1954-02-01 Means for evaluating electro-conductive marks on statistical record cards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2920/54A GB750268A (en) 1954-02-01 1954-02-01 Means for evaluating electro-conductive marks on statistical record cards

Publications (1)

Publication Number Publication Date
GB750268A true GB750268A (en) 1956-06-13

Family

ID=9748563

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2920/54A Expired GB750268A (en) 1952-02-29 1954-02-01 Means for evaluating electro-conductive marks on statistical record cards

Country Status (1)

Country Link
GB (1) GB750268A (en)

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