GB771481A - Improvements in or relating to changeover circuit arrangements - Google Patents

Improvements in or relating to changeover circuit arrangements

Info

Publication number
GB771481A
GB771481A GB706454A GB706454A GB771481A GB 771481 A GB771481 A GB 771481A GB 706454 A GB706454 A GB 706454A GB 706454 A GB706454 A GB 706454A GB 771481 A GB771481 A GB 771481A
Authority
GB
United Kingdom
Prior art keywords
tube
strikes
lead
register
translator
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
GB706454A
Inventor
Ronald Threadgold
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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 Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB706454A priority Critical patent/GB771481A/en
Priority to DEA22218A priority patent/DE961101C/en
Publication of GB771481A publication Critical patent/GB771481A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/52—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of gas-filled tubes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K23/00—Pulse counters comprising counting chains; Frequency dividers comprising counting chains
    • H03K23/82—Pulse counters comprising counting chains; Frequency dividers comprising counting chains using gas-filled tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Electron Beam Exposure (AREA)

Abstract

771,481. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd. Feb. 4, 1955 [March 11, 1954], No. 7064/54. Addition to 765,928. Class 40 (4). [Also in Group XL (c)] In a modification of the two-position circuit device described in the parent Specification, a positive control potential from the cathode of a conducting tube VK3, Fig. 1, is applied to the cathode of VK1 and the trigger electrode of VK2. A negative test pulse on lead 10 strikes VK2 if the control potential is present and otherwise strikes VK1. When VK1 strikes the initial surge of current into condensers C3, C4 causes a negative pulse to be transmitted over lead 11. As in the Specification referred to, a number of two-position devices may be connected in a chain to form a hunting circuit associated with a translator. Each twoposition device corresponds to a register and tube VK3 strikes when the register needs the translator. When the translator is free a negative pulse is applied to lead 10. In the associated register is not marked, tube VK1 strikes and repeats the negative pulse over lead 11 to the incoming lead 10 of the next twoposition device. Condensers C1 and C3, C2 and C5 of one stage feed the tube VK1 of the preceding stage at the beginning of a pulse and render the tube self-extinguishing. If tube VK2 strikes, indicating that a marked register has been formed, a positive signal is transmitted over lead 12. In another modification, Fig. 2, the current surge in tube VK1 is limited by resistors R4, R5 and by a condenser C6 and a resistor R4 in the next stage.
GB706454A 1954-03-11 1954-03-11 Improvements in or relating to changeover circuit arrangements Expired GB771481A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB706454A GB771481A (en) 1954-03-11 1954-03-11 Improvements in or relating to changeover circuit arrangements
DEA22218A DE961101C (en) 1954-03-11 1955-03-08 Counter circuit arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB706454A GB771481A (en) 1954-03-11 1954-03-11 Improvements in or relating to changeover circuit arrangements

Publications (1)

Publication Number Publication Date
GB771481A true GB771481A (en) 1957-04-03

Family

ID=9825935

Family Applications (1)

Application Number Title Priority Date Filing Date
GB706454A Expired GB771481A (en) 1954-03-11 1954-03-11 Improvements in or relating to changeover circuit arrangements

Country Status (2)

Country Link
DE (1) DE961101C (en)
GB (1) GB771481A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB677872A (en) * 1950-11-02 1952-08-20 Standard Telephones Cables Ltd Improvements in or relating to gaseous discharge tube counting chains

Also Published As

Publication number Publication date
DE961101C (en) 1957-04-04

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