GB1060878A - Code generating keyboards - Google Patents

Code generating keyboards

Info

Publication number
GB1060878A
GB1060878A GB25871/65A GB2587165A GB1060878A GB 1060878 A GB1060878 A GB 1060878A GB 25871/65 A GB25871/65 A GB 25871/65A GB 2587165 A GB2587165 A GB 2587165A GB 1060878 A GB1060878 A GB 1060878A
Authority
GB
United Kingdom
Prior art keywords
key
store
encoder
signal
arrangement
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
GB25871/65A
Inventor
John William Peters
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.)
Creed and Co Ltd
Original Assignee
Creed and Co 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 Creed and Co Ltd filed Critical Creed and Co Ltd
Priority to GB25871/65A priority Critical patent/GB1060878A/en
Priority to US550859A priority patent/US3454717A/en
Priority to DE19661524107 priority patent/DE1524107A1/en
Publication of GB1060878A publication Critical patent/GB1060878A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/16—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of transmitters, e.g. code-bars, code-discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

1,060,878. Selective printing. CREED & CO. Ltd. June 18, 1965, No. 25871/65. Heading B6F. [Also in Division H4] A keyboard transmitter in which depression of a key provides a parallel signal which passes via a store to a distributer comprises means for automatically holding down a second key if that key is depressed when the store is full. In the embodiment described an actuated key enables an encoder which produces a 5-bit signal. This is gated to a first store whose output is gated to a second store which feeds the distributer. An arrangement of gates, toggles, and delays controls the gates and the resetting of the stores. This arrangement is fed by the Stop bit of the transmitted signal and by a signal from a circuit which checks the parallel signal from the encoder. If a second key is pressed when the first store is full, and if the encoder check is correct, the arrangement operates an electromagnet which holds down the second key until the first store is read out, the second key's 5-bit signal then passing from the encoder to the first store and the electromagnet being de-energized to release the key.
GB25871/65A 1965-06-18 1965-06-18 Code generating keyboards Expired GB1060878A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB25871/65A GB1060878A (en) 1965-06-18 1965-06-18 Code generating keyboards
US550859A US3454717A (en) 1965-06-18 1966-05-17 Code generating keyboard apparatus
DE19661524107 DE1524107A1 (en) 1965-06-18 1966-06-18 Key-operated input device with keypad lock for serial transmission of binary coded information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25871/65A GB1060878A (en) 1965-06-18 1965-06-18 Code generating keyboards

Publications (1)

Publication Number Publication Date
GB1060878A true GB1060878A (en) 1967-03-08

Family

ID=10234734

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25871/65A Expired GB1060878A (en) 1965-06-18 1965-06-18 Code generating keyboards

Country Status (3)

Country Link
US (1) US3454717A (en)
DE (1) DE1524107A1 (en)
GB (1) GB1060878A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3683110A (en) * 1968-04-29 1972-08-08 Vogue Instr Corp Encoding device
US3568183A (en) * 1968-07-09 1971-03-02 Gen Electric Keyboard synchronized toned generator
US3675240A (en) * 1969-12-23 1972-07-04 Bell Telephone Labor Inc Keyboard encoding arrangement
US3675239A (en) * 1970-09-14 1972-07-04 Ncr Co Unlimited roll keyboard circuit
US3662382A (en) * 1970-11-09 1972-05-09 Camera And Instr Corp Keyboard controlled electrical code-signal generator system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2255030A (en) * 1939-10-05 1941-09-02 Ibm Keyboard locking device
US2623118A (en) * 1948-10-08 1952-12-23 Creed & Co Ltd Keyboard controlled telegraph apparatus
US2869703A (en) * 1953-06-08 1959-01-20 Grundig Max Type key blocking mechanism
US2858888A (en) * 1956-01-26 1958-11-04 Ibm Relay storage and readout device
US3308918A (en) * 1965-09-20 1967-03-14 Ibm Pseudo-interlock employing strobe signal with selected keys

Also Published As

Publication number Publication date
DE1524107A1 (en) 1970-01-29
US3454717A (en) 1969-07-08

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