GB1156899A - Computer Systems - Google Patents

Computer Systems

Info

Publication number
GB1156899A
GB1156899A GB1225768A GB1225768A GB1156899A GB 1156899 A GB1156899 A GB 1156899A GB 1225768 A GB1225768 A GB 1225768A GB 1225768 A GB1225768 A GB 1225768A GB 1156899 A GB1156899 A GB 1156899A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
computer
signals
pressed
actuated
produces
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
GB1225768A
Inventor
Peter James
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.)
PHOTO MAGNETIC SYSTEMS Inc
Original Assignee
PHOTO MAGNETIC SYSTEMS Inc
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/26Devices for signalling identity of wanted subscriber
    • H04M1/30Devices which can set up and transmit only one digit at a time
    • H04M1/50Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H04M1/505Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies signals generated in digital form
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/02Constructional features of telephone sets
    • H04M1/21Combinations with auxiliary equipment, e.g. with clock, with memoranda pads
    • H04M1/215Combinations with auxiliary equipment, e.g. with clock, with memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems adapted for combination with other electrical systems
    • H04M11/06Simultaneous speech and telegraphic or other data transmission over the same conductors

Abstract

1,156,899. Electric digital calculators. PHOTO MAGNETIC SYSTEMS Inc. 13 March, 1968, No. 12257/68. Heading G4A. [Also in Division H4] A computer system includes a frequency response computer and a tone generating telephone set connected to the computer, the set having a plurality of keys operative when actuated individually to produce first signals having different frequency characteristics corresponding to the key actuated and operative when actuated in groups to produce second signals having still different frequency characteristics corresponding to the group of keys actuated, the computer being responsive to the signals to receive data and be commanded in accordance with the signals. A push-button telephone set having buttons as shown in Fig. 3 has different frequencies associated with each row and column, i.e. #1-#7 as shown in Fig. 3. Each button pressed singly produces two frequencies corresponding to its row and column placement. For instance 1 produces f1 and f5, 8 produces f3, f6 &c. However if two buttons are pressed simultaneously only one frequency, the common frequency, is produced, e.g. if 2 and 3 are pressed f1 is produced, if 4 and 7 are pressed f5 is produced. These signals can be distinguished by the computer so that the former are recognized as digits and the latter as instructions, the frequencies being translated to digital pulses at the computer.
GB1225768A 1968-03-13 1968-03-13 Computer Systems Expired GB1156899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1225768A GB1156899A (en) 1968-03-13 1968-03-13 Computer Systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1225768A GB1156899A (en) 1968-03-13 1968-03-13 Computer Systems

Publications (1)

Publication Number Publication Date
GB1156899A true true GB1156899A (en) 1969-07-02

Family

ID=10001244

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1225768A Expired GB1156899A (en) 1968-03-13 1968-03-13 Computer Systems

Country Status (1)

Country Link
GB (1) GB1156899A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218904A2 (en) * 1985-10-15 1987-04-22 International Business Machines Corporation Process for modifying operation of application program

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0218904A2 (en) * 1985-10-15 1987-04-22 International Business Machines Corporation Process for modifying operation of application program
EP0218904A3 (en) * 1985-10-15 1988-11-17 International Business Machines Corporation Process for modifying operation of application program

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees