GB408624A - Improvements in or relating to electrical timing devices - Google Patents

Improvements in or relating to electrical timing devices

Info

Publication number
GB408624A
GB408624A GB2806632A GB2806632A GB408624A GB 408624 A GB408624 A GB 408624A GB 2806632 A GB2806632 A GB 2806632A GB 2806632 A GB2806632 A GB 2806632A GB 408624 A GB408624 A GB 408624A
Authority
GB
United Kingdom
Prior art keywords
relay
condenser
resistance
contacts
circuit
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
GB2806632A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2806632A priority Critical patent/GB408624A/en
Publication of GB408624A publication Critical patent/GB408624A/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
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/288—Modifications for introducing a time delay before switching in tube switches

Landscapes

  • Relay Circuits (AREA)

Abstract

408,624. Valve circuits. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, and ESPLEY, D. C., c/o General Electric Co., Wembley, Middlesex. Oct. 8, 1932, No. 28066. [Class 40 (v).] An electrical timing circuit for automatic traffic signals and the like is supplied with A.C. and comprises a thermionic triode, the anode circuit of which includes a relay A for effecting the desired control, and also a condenser C2 in one position of a relay D (not shown) which controls contacts d1, d2. With the relay D de-energized, the condenser C2 is charged from A.C. supply through the triode because contact d2 is closed and switch d1 connects the condenser C2 in the anode circuit of the valve. When the relay D is energized the condenser C2 is connected to the grid of the triode and contact d2 is opened. The charge on C2 leaks away over the resistance R2 and, after a predetermined time, the anode current rises sufficiently to operate the relay A which remains energized until the relay D is again operated. The device may be arranged to repeat the cycle indefinitely by controlling the contacts d1 from the relay A and contacts d2 from a relay in the circuit of the condenser C2. In a modification, the condenser C2 is connected in series with the resistance R2 across the resistance R1 and is paralleled by a resistance under the .control of a switch operated by the relay A. This arrangement functions continuously as an impulser, the impulses being supplied to external circuits by contacts on the relay A. A relay E (not shown) may be arranged to control a switch e1 in the circuit of the discharging resistance R2. Specification 402,750 is referred to.
GB2806632A 1932-10-08 1932-10-08 Improvements in or relating to electrical timing devices Expired GB408624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2806632A GB408624A (en) 1932-10-08 1932-10-08 Improvements in or relating to electrical timing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2806632A GB408624A (en) 1932-10-08 1932-10-08 Improvements in or relating to electrical timing devices

Publications (1)

Publication Number Publication Date
GB408624A true GB408624A (en) 1934-04-09

Family

ID=10269723

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2806632A Expired GB408624A (en) 1932-10-08 1932-10-08 Improvements in or relating to electrical timing devices

Country Status (1)

Country Link
GB (1) GB408624A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428581A (en) * 1942-07-18 1947-10-07 Automatic Elect Lab Apparatus for controlling the release of bombs from aircraft
US2483126A (en) * 1946-04-10 1949-09-27 Gen Electric Delay timer
US2551224A (en) * 1947-02-24 1951-05-01 Edi Holding Inc Cold cathode triode electronic timer
US2607907A (en) * 1950-07-03 1952-08-19 Marshall Curtis Electronic timing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428581A (en) * 1942-07-18 1947-10-07 Automatic Elect Lab Apparatus for controlling the release of bombs from aircraft
US2483126A (en) * 1946-04-10 1949-09-27 Gen Electric Delay timer
US2551224A (en) * 1947-02-24 1951-05-01 Edi Holding Inc Cold cathode triode electronic timer
US2607907A (en) * 1950-07-03 1952-08-19 Marshall Curtis Electronic timing device

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