GB1124492A - Improvements relating to electric timing circuits - Google Patents

Improvements relating to electric timing circuits

Info

Publication number
GB1124492A
GB1124492A GB17292/65A GB1729265A GB1124492A GB 1124492 A GB1124492 A GB 1124492A GB 17292/65 A GB17292/65 A GB 17292/65A GB 1729265 A GB1729265 A GB 1729265A GB 1124492 A GB1124492 A GB 1124492A
Authority
GB
United Kingdom
Prior art keywords
capacitor
miller
amplifier
output
charge
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
GB17292/65A
Inventor
Malcolm Legg
John Brian Patrickson
Leonhard Martin Wedepohl
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.)
A Reyrolle and Co Ltd
Original Assignee
A Reyrolle 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 A Reyrolle and Co Ltd filed Critical A Reyrolle and Co Ltd
Priority to GB17292/65A priority Critical patent/GB1124492A/en
Priority to US544583A priority patent/US3408539A/en
Priority to DK208766AA priority patent/DK116297B/en
Priority to DER43110A priority patent/DE1277915B/en
Priority to NL6605456A priority patent/NL6605456A/xx
Priority to CH585166A priority patent/CH480684A/en
Priority to BE679955D priority patent/BE679955A/xx
Priority to FR58711A priority patent/FR1477144A/en
Publication of GB1124492A publication Critical patent/GB1124492A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/13—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C23/00—Clocks with attached or built-in means operating any device at preselected times or after preselected time-intervals
    • G04C23/02—Constructional details
    • G04C23/12—Electric circuitry
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Relay Circuits (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Electronic Switches (AREA)

Abstract

1,124,492. Protective arrangements. A. REYROLLE & CO. Ltd. 22 April, 1966 [23 April, 1965], No. 17292/65. Heading H2K. [Also in Division H3] A time delayed switch for a protective system comprises a transistor-type Miller integrator timer in which the Miller capacitor is connected to a tapping point on the output resistor of the amplifier so that it is given a small charge at the commencement of the timing period. When a fault occurs a reed relay 10 makes a contact 11 so that a capacitor 60 coupled in Miller fashion between the output and input of an amplifier 50, 51, 52 commences to charge. Charging continues until the output from a potentiometer 64 is sufficient to change over the conducting conditions of a Schmitttype circuit 65-75 and so operate or release a tripping relay 75 depending upon whether it is connected by links 77 to the output of transistor 67 or 68. When the relay contact 11 is opened the capacitor discharges quickly through diodes 61, 62 and potentiometer 53, 63. In order to avoid timing uncertainties due to the difficulty of completely discharging the Miller capacitor 60, its upper terminal is connected to a tapping on the resistor load 54, 55 of the Miller amplifier so as rapidly to charge capacitor 60 to a small value prior to the main charging period. A time lag varying inversely with the input may be obtained by charging the capacitor from the protected supply. Alternatively (as in Fig. 2, not shown) a characteristic of the form IT = K, or 1<SP>2</SP>T = K or according to BSS142 may be obtained by feeding the input current (81) for the capacitor through a transformer to a shaping circuit (80). In addition, in Fig. 2, the. integrator amplifier uses complementary-type transistors (85, 88, 89) to reduce the threshold voltage and a complementary output switch is connected to the amplifier through a diode to operate the relay when the capacitor charge reaches a predetermined value.
GB17292/65A 1965-04-23 1965-04-23 Improvements relating to electric timing circuits Expired GB1124492A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB17292/65A GB1124492A (en) 1965-04-23 1965-04-23 Improvements relating to electric timing circuits
US544583A US3408539A (en) 1965-04-23 1966-04-22 Electric timing circuits
DK208766AA DK116297B (en) 1965-04-23 1966-04-22 Delay relay circuit.
DER43110A DE1277915B (en) 1965-04-23 1966-04-22 Time-delayed electronic relay
NL6605456A NL6605456A (en) 1965-04-23 1966-04-22
CH585166A CH480684A (en) 1965-04-23 1966-04-22 Relay timer electrical circuit
BE679955D BE679955A (en) 1965-04-23 1966-04-22
FR58711A FR1477144A (en) 1965-04-23 1966-04-22 Improvements to electrical timing circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17292/65A GB1124492A (en) 1965-04-23 1965-04-23 Improvements relating to electric timing circuits

Publications (1)

Publication Number Publication Date
GB1124492A true GB1124492A (en) 1968-08-21

Family

ID=10092637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17292/65A Expired GB1124492A (en) 1965-04-23 1965-04-23 Improvements relating to electric timing circuits

Country Status (8)

Country Link
US (1) US3408539A (en)
BE (1) BE679955A (en)
CH (1) CH480684A (en)
DE (1) DE1277915B (en)
DK (1) DK116297B (en)
FR (1) FR1477144A (en)
GB (1) GB1124492A (en)
NL (1) NL6605456A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271895A (en) * 1992-10-23 1994-04-27 Smiths Industries Plc Relay operating system.

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526812A (en) * 1967-04-06 1970-09-01 Gen Electric Power supply for circuit breaker tripping
US3466506A (en) * 1967-05-03 1969-09-09 Gen Time Corp Pulse generator for periodically energizing a timer solenoid
US3534222A (en) * 1968-11-04 1970-10-13 Collins Radio Co Electronic timer circuit for delayed application of discharge potential
US3711761A (en) * 1970-08-13 1973-01-16 Westinghouse Electric Corp Off delay timer and internally generated auxiliary direct current voltage source for a controlled rectifier alternating current switch for use therein
DE2257373B1 (en) * 1972-11-23 1973-10-11 Sds-Elektro Gmbh, 8024 Deisenhofen Circuit arrangement for delaying the pick-up of a relay
FR2219554B1 (en) * 1973-02-28 1978-03-03 Electricite De France
JPS50145840A (en) * 1974-05-11 1975-11-22
JPS54100248A (en) * 1978-01-25 1979-08-07 Sony Corp Timer circuit
DE3232240A1 (en) * 1982-08-30 1984-03-01 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR CONNECTING A MODEM TO A TELEPHONE LINE

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942123A (en) * 1956-01-31 1960-06-21 Westinghouse Electric Corp Time delay control device
DE1057173B (en) * 1956-03-27 1959-05-14 Westinghouse Electric Corp Self-locking transistor circuit
DE1045456B (en) * 1957-02-01 1958-12-04 Siemens Ag Time switch to generate a voltage jump that follows a switching process after a defined period of time
US3127542A (en) * 1959-06-08 1964-03-31 Mc Graw Edison Co Automatic reclosing breaker system including a repeating circuit interrupter and sectionalizer switches
DE1152145B (en) * 1961-01-04 1963-08-01 Elektro App Werke Berlin Trept Delay circuit, especially for relay circuits
US3262017A (en) * 1962-11-01 1966-07-19 Allis Chalmers Mfg Co Static overcurrent tripping device
US3346797A (en) * 1963-01-21 1967-10-10 Allis Chalmers Mfg Co Static relay control circuit
DE1185224B (en) * 1963-10-10 1965-01-14 Telefunken Patent Electronic delay circuit
US3317791A (en) * 1965-02-26 1967-05-02 Westinghouse Electric Corp Circuit-controlling systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271895A (en) * 1992-10-23 1994-04-27 Smiths Industries Plc Relay operating system.

Also Published As

Publication number Publication date
DE1277915B (en) 1968-09-19
FR1477144A (en) 1967-04-14
CH585166A4 (en) 1969-07-15
NL6605456A (en) 1966-10-24
BE679955A (en) 1966-10-03
US3408539A (en) 1968-10-29
DK116297B (en) 1969-12-29
CH480684A (en) 1969-12-15

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