GB913757A - Semi-conductor time delay units - Google Patents

Semi-conductor time delay units

Info

Publication number
GB913757A
GB913757A GB2813160A GB2813160A GB913757A GB 913757 A GB913757 A GB 913757A GB 2813160 A GB2813160 A GB 2813160A GB 2813160 A GB2813160 A GB 2813160A GB 913757 A GB913757 A GB 913757A
Authority
GB
United Kingdom
Prior art keywords
capacitor
transistor
uni
load
current
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
GB2813160A
Inventor
Gordon Brooks
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.)
Lucas Support Services Ltd
Original Assignee
Rotax 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 Rotax Ltd filed Critical Rotax Ltd
Priority to GB2813160A priority Critical patent/GB913757A/en
Publication of GB913757A publication Critical patent/GB913757A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/18—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
    • 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
    • H03K17/292—Modifications for introducing a time delay before switching in thyristor, unijunction transistor or programmable unijunction transistor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/313—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of semiconductor devices with two electrodes, one or two potential barriers, and exhibiting a negative resistance characteristic

Landscapes

  • Dc-Dc Converters (AREA)

Abstract

913,757. Semi-conductor delay circuits. ROTAX Ltd. July 10, 1961 [Aug. 15, 1960], No. 28131/60. Class 40 (6). A time-delay circuit comprises a controlled rectifier controlling the current to a load, a four-layer diode or uni-junction transistor controlling the current to the controlled rectifier, and a capacitor controlling the current .to the diode. In a first embodiment, Fig. 1, a capacitor 4 and a resistor 3 are connected in series across D.C. supply terminals 1, 2 with their junction connected to the emitter of a uni-junction transistor 5. One of the bases of the transistor is connected to the trigger electrode of a controlled rectifier 8, the anode cathode path of which is connected across the supply terminals in series with a coil 9 of a relay which may control a contact between the supply and a load. Alternatively, the capacitor 4 and primary base may be connected to the terminal 2 through the relay coil, or the relay may be omitted and the load connected directly in place of coil 9. On switching on capacitor 4 charges until transistor 5 conducts to trigger rectifier 8. In a second embodiment, Fig. 2, the uni-junction transistor is replaced by a four-layer diode 10.
GB2813160A 1960-08-15 1960-08-15 Semi-conductor time delay units Expired GB913757A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2813160A GB913757A (en) 1960-08-15 1960-08-15 Semi-conductor time delay units

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2813160A GB913757A (en) 1960-08-15 1960-08-15 Semi-conductor time delay units

Publications (1)

Publication Number Publication Date
GB913757A true GB913757A (en) 1962-12-28

Family

ID=10270749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2813160A Expired GB913757A (en) 1960-08-15 1960-08-15 Semi-conductor time delay units

Country Status (1)

Country Link
GB (1) GB913757A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3427562A (en) * 1966-10-26 1969-02-11 Allegheny Ludlum Steel Voltage controlled variable frequency relaxation oscillator
US3503062A (en) * 1965-11-12 1970-03-24 Bendix Corp Direct current power supply voltage level indicator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3503062A (en) * 1965-11-12 1970-03-24 Bendix Corp Direct current power supply voltage level indicator
US3427562A (en) * 1966-10-26 1969-02-11 Allegheny Ludlum Steel Voltage controlled variable frequency relaxation oscillator

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