GB1429258A - Off-delay timing apparatus - Google Patents

Off-delay timing apparatus

Info

Publication number
GB1429258A
GB1429258A GB4737973A GB4737973A GB1429258A GB 1429258 A GB1429258 A GB 1429258A GB 4737973 A GB4737973 A GB 4737973A GB 4737973 A GB4737973 A GB 4737973A GB 1429258 A GB1429258 A GB 1429258A
Authority
GB
United Kingdom
Prior art keywords
switch
relay
load
oct
semi
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
GB4737973A
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.)
Cutler Hammer Europe Ltd
Cutler Hammer Inc
Original Assignee
Cutler Hammer Europe Ltd
Cutler Hammer 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
Application filed by Cutler Hammer Europe Ltd, Cutler Hammer Inc filed Critical Cutler Hammer Europe Ltd
Publication of GB1429258A publication Critical patent/GB1429258A/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
    • H03K17/292—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
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch

Landscapes

  • Electronic Switches (AREA)

Abstract

1429258 Semi-conductor switching circuits; CUTLER-HAMMER EUROPA Ltd 10 Oct 1973 [10 Oct 1972] 47379/73 Heading H3T [Also in Division H2] Semi-conductor switches Q1, Q2, Q3 continue to supply current to a load 10 after opening of the switch S for a time determined by a capacitor C3. When switch S is closed, Q5 and Q6 charge C3 to a voltage determined by Q7 and R14, R15. This holds off Q8 so that Q9, Q10 can energize a relay winding CR1 whose contact CR2 turns on the triac Q1 and the Darlington pair Q2, Q3. The load 10 now receives A.C. from L1 via D1 and D2, or else D.C. from L1 (if it is a D.C. source) via D1, the impedance of D1 being much lower than the Q2, Q3 path. When switch S is opened, Q6, Q7 go off and C3 discharges through R12 and P at a rate determined by P. After a time, Q8 conducts turning off Q9, Q10 and de-energizing the relay CR. Thus Q1, Q2, Q3, which carried the load current direct from the supply terminal L1 after opening of S, eventually turn off. While the relay is energized an L.E.D. is illuminated; while the timing operation is in progress it flashes on and off due to relaxation oscillation of a PUT Q11 with C5, the latter having been shorted out previously by Q12. Transient suppression components include a voltage sensitive register ZNR1, capacitors C1, C4 and resistor R4.
GB4737973A 1972-10-10 1973-10-10 Off-delay timing apparatus Expired GB1429258A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29842972A 1972-10-10 1972-10-10

Publications (1)

Publication Number Publication Date
GB1429258A true GB1429258A (en) 1976-03-24

Family

ID=23150479

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4737973A Expired GB1429258A (en) 1972-10-10 1973-10-10 Off-delay timing apparatus

Country Status (3)

Country Link
US (1) US3784881A (en)
CA (1) CA986180A (en)
GB (1) GB1429258A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227618A (en) * 1989-01-31 1990-08-01 Tech Developments Limited A timer unit for a solenoid valve

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4037148A (en) * 1975-08-15 1977-07-19 General Electric Company Ballast control device
US4097791A (en) * 1975-12-01 1978-06-27 Towmotor Corporation Delayed turn-on and turn-off control circuit
FR2521771A1 (en) * 1982-02-12 1983-08-19 Telemecanique Electrique CONTROL CONTACT POWER SUPPLY CIRCUIT AND ITS APPLICATION TO CONTROL RELAY REST TIMING
IT1217736B (en) * 1988-05-26 1990-03-30 Sgs Thomson Microeletronics Sp SELF-POWERED DELAYED ELECTRONIC SHUTDOWN CIRCUIT WITH VERY LOW VOLTAGE CONTROL
AU5382494A (en) * 1994-01-18 1995-08-03 Premlex Pty. Ltd. A switching circuit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334243A (en) * 1964-04-30 1967-08-01 Gen Electric Semiconductor timing networks
US3401312A (en) * 1965-06-29 1968-09-10 Square D Co Solid state time delay after deenergization function circuit
US3512048A (en) * 1967-03-03 1970-05-12 Gen Time Corp Electronic timer circuit
US3530311A (en) * 1967-03-03 1970-09-22 Gen Time Corp Voltage control means for solid state ac relay electronic timer
US3457433A (en) * 1967-03-24 1969-07-22 Westinghouse Electric Corp Off-delay apparatus
US3597662A (en) * 1968-05-28 1971-08-03 Westinghouse Electric Corp Off delay solid-state time delay apparatus
US3555367A (en) * 1968-06-07 1971-01-12 Westinghouse Electric Corp Off delay timer and internally generated auxiliary direct current voltage source for a controlled rectifier alternating current switch for use therein
US3575639A (en) * 1969-04-21 1971-04-20 Texas Instruments Inc Time delay circuit adapted for use in a power control system
US3641397A (en) * 1970-04-08 1972-02-08 Cutler Hammer Inc Off-delay solid-state timer systems
US3644793A (en) * 1970-05-01 1972-02-22 Cutler Hammer Inc Timed "on" cycle electronic timing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227618A (en) * 1989-01-31 1990-08-01 Tech Developments Limited A timer unit for a solenoid valve

Also Published As

Publication number Publication date
CA986180A (en) 1976-03-23
US3784881A (en) 1974-01-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee