US3732467A - Relay release delay circuit - Google Patents

Relay release delay circuit Download PDF

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Publication number
US3732467A
US3732467A US00139336A US3732467DA US3732467A US 3732467 A US3732467 A US 3732467A US 00139336 A US00139336 A US 00139336A US 3732467D A US3732467D A US 3732467DA US 3732467 A US3732467 A US 3732467A
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US
United States
Prior art keywords
relay
terminal
transistor
capacitor
voltage divider
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 - Lifetime
Application number
US00139336A
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English (en)
Inventor
J Mills
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.)
AG Communication Systems Corp
Original Assignee
GTE Automatic Electric Laboratories 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 GTE Automatic Electric Laboratories Inc filed Critical GTE Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of US3732467A publication Critical patent/US3732467A/en
Assigned to AG COMMUNICATION SYSTEMS CORPORATION, 2500 W. UTOPIA RD., PHOENIX, AZ 85027, A DE CORP. reassignment AG COMMUNICATION SYSTEMS CORPORATION, 2500 W. UTOPIA RD., PHOENIX, AZ 85027, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GTE COMMUNICATION SYSTEMS CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • ABSTRACT I A circuit is disclosed that is connected to the driving conductor of a relay to increase the relays release 1 Claim, 1 Drawing Figure Clku- PATENTED HAY 81973 NKU INVENTOR JEFFREY P. MILLS BY h 5.7% ATTORNEY BACKGROUND OF THE INVENTION 1.
  • This invention pertains to circuits for maintaining a relay in the operated state for a fixed period of time after the operating drive is removed and more particularly to decrease the potential variations of this delay period.
  • FIGURE is a schematic diagram of a circuit embodying the principles of this invention.
  • the relay RLY is that whose release time is to be delayed. It is shown as having one terminal of its winding connected to a source of negative potential 1 l and the other terminal of its winding connected via a diode CR2 to one terminal of a switch SW. The other terminal of the switch is connected to a source of positive potential 10. Operation of the switch to its closed position completes the operate circuit for the relay causing it to operate.
  • the switch SW is merely symbolic, it may be a switch as shown, but more likely it would be a semiconductor switch when used in an electronic switching system. Without the remainder of the circuit, operation of the switch to its open circuit state would cause the relay to fall back or release almost instantaneously.
  • the circuit shown connected between the switch terminal and the relay terminal, in its normal state with the switch unoperated has the transistors Q1 and Q2 cut off. Grounding the input from the switch causes a current to flow from grounded terminal 10 through switch SW diode CR1 and resistor R10 to discharge capacitor C1. The shifting of this voltage level at the ungrounded plate of capacitor C1 turns on transistor Q1 via its connection through resistor R8 to the base of Q1. Current now flows from ground potential through resistors R2 and R3, the collector to emitter path of transistor Q1 through the emitter to collector path of transistor Q3 and resistor R5 to negative battery. Transistor Q2 is turned on by the collector current of transistor Q1 through resistor R3, one terminal of which is connected to the base of transistor Q2.
  • the current flow is from ground potential through diode CR3, the emitter to collector path of transistor Q2, through the coil of relay RLY to negative battery at terminal 11.
  • Resistor R1 serves to draw a current through diode CR3 to maintain the emitter of Q2 at a constant bias voltage level above ground potential.
  • Diode CR4 is for the purpose of shunting the current induced by the collapsing field of the relay.
  • the operation would be such as to provide a release delay for the relay RLY, but it would be dependent upon the source voltage level.
  • the charge path for capacitor C1 is from the negative potential source through resistor R9 and also through resistor R8 and transistor Q1. With a higher source voltage, the capacitor C1 would charge up faster thus decreasing the delay interval. While with a lower source voltage the rate of charge would be slower and the overall interval would be increased.
  • a reference voltage that varies proportionally with the source is provided for the capacitor C1 via diode CR5.
  • This reference voltage is derived by the voltage divider consisting of resistors R6 and R7.
  • Transistor Q3 with its base connected to this voltage divider and its emitter connected to ground via resistor R4, is an emitter follower which amplifies the current output of the voltage divider and provides a low impedance source of the reference voltage.
  • the rate of charge of capacitor C1 is necessarily proportional to the source voltage. Since the reference voltage is also proportional to the source voltage, these two factors will nullify each other when the delay time is computed. Therefore, the delay time is completely independent of the source voltage. The actual delay time is only dependent on the values chosen for resistors R8 and R9 and capacitor C1, their respective tolerances, and the junction parameters of transistor Q1.
  • a source of energizing potential having a first polarity terminal and a second polarity terminal, said source being subject to voltage variations; a terminal of said relay operate winding connected to said first polarity terminal, operating means for operating said relay and connect means joining said operating means to another terminal of said relay, said operating means effective upon operation to apply a potential of said second polarity terminal to operate said relay, a relay release delay means having an input connected to said operating means and an output connected to said other terminal of said relay and comprising a first voltage divider, a first amplifier normally in a non-conductive state, said amplifier including first and second transistors each having a plurality of electrodes including an emitter, a collector and a base electrode, means for providing operating potentials to said electrodes for maintaining them in a normally non-conductive state, means for connecting said first transistor base to said operating means via said first voltage divider, said first and second transistors placed in a conductive state upon operation of said operate means, means connecting said second transistor base to said first transistor collector and

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  • Relay Circuits (AREA)
  • Control Of Amplification And Gain Control (AREA)
US00139336A 1971-05-03 1971-05-03 Relay release delay circuit Expired - Lifetime US3732467A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13933671A 1971-05-03 1971-05-03

Publications (1)

Publication Number Publication Date
US3732467A true US3732467A (en) 1973-05-08

Family

ID=22486148

Family Applications (1)

Application Number Title Priority Date Filing Date
US00139336A Expired - Lifetime US3732467A (en) 1971-05-03 1971-05-03 Relay release delay circuit

Country Status (5)

Country Link
US (1) US3732467A (fr)
BE (1) BE782929A (fr)
CA (1) CA934049A (fr)
GB (1) GB1386011A (fr)
IT (1) IT953744B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809927A (en) * 1971-03-31 1974-05-07 Tokai Rika Co Ltd Delay timing circuit
US4107553A (en) * 1977-04-25 1978-08-15 General Electric Company Timer control circuit
US4267467A (en) * 1978-01-25 1981-05-12 Sony Corporation Timer circuit
US4546266A (en) * 1983-07-28 1985-10-08 Zenick Walter N Magnetically actuated interlock
RU2156198C2 (ru) * 1998-09-07 2000-09-20 Государственный проектно-изыскательский институт "ГИПРОТРАНССИГНАЛСВЯЗЬ" Устройство для замедления на отпускание якоря электромагнитного исполнительного реле
RU2844818C1 (ru) * 2024-09-23 2025-08-07 Общество с ограниченной ответственностью "ВНИИР-Промэлектро" Электромагнитное реле с нормированными параметрами

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958017A (en) * 1958-10-22 1960-10-25 Collins Radio Co Fast attack slow release relay circuit
US3069552A (en) * 1961-03-07 1962-12-18 Electronics Corp America Timing circuit
US3165648A (en) * 1961-07-25 1965-01-12 Fords Ltd Timing circuits providing constant time delay independent of voltage supply variation
US3246209A (en) * 1961-07-06 1966-04-12 Tempco Instr Inc Control apparatus
US3287608A (en) * 1963-06-03 1966-11-22 Westinghouse Air Brake Co Time delay control circuit
US3334243A (en) * 1964-04-30 1967-08-01 Gen Electric Semiconductor timing networks
US3376429A (en) * 1965-06-04 1968-04-02 Wagner Electric Corp Time delay circuit
US3382417A (en) * 1965-07-30 1968-05-07 Bourns Inc Time delay relay device
US3401312A (en) * 1965-06-29 1968-09-10 Square D Co Solid state time delay after deenergization function circuit
US3573564A (en) * 1967-05-23 1971-04-06 Siemens Ag Relay time control circuit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2958017A (en) * 1958-10-22 1960-10-25 Collins Radio Co Fast attack slow release relay circuit
US3069552A (en) * 1961-03-07 1962-12-18 Electronics Corp America Timing circuit
US3246209A (en) * 1961-07-06 1966-04-12 Tempco Instr Inc Control apparatus
US3165648A (en) * 1961-07-25 1965-01-12 Fords Ltd Timing circuits providing constant time delay independent of voltage supply variation
US3287608A (en) * 1963-06-03 1966-11-22 Westinghouse Air Brake Co Time delay control circuit
US3334243A (en) * 1964-04-30 1967-08-01 Gen Electric Semiconductor timing networks
US3376429A (en) * 1965-06-04 1968-04-02 Wagner Electric Corp Time delay circuit
US3401312A (en) * 1965-06-29 1968-09-10 Square D Co Solid state time delay after deenergization function circuit
US3382417A (en) * 1965-07-30 1968-05-07 Bourns Inc Time delay relay device
US3573564A (en) * 1967-05-23 1971-04-06 Siemens Ag Relay time control circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809927A (en) * 1971-03-31 1974-05-07 Tokai Rika Co Ltd Delay timing circuit
US4107553A (en) * 1977-04-25 1978-08-15 General Electric Company Timer control circuit
US4267467A (en) * 1978-01-25 1981-05-12 Sony Corporation Timer circuit
US4546266A (en) * 1983-07-28 1985-10-08 Zenick Walter N Magnetically actuated interlock
RU2156198C2 (ru) * 1998-09-07 2000-09-20 Государственный проектно-изыскательский институт "ГИПРОТРАНССИГНАЛСВЯЗЬ" Устройство для замедления на отпускание якоря электромагнитного исполнительного реле
RU2844818C1 (ru) * 2024-09-23 2025-08-07 Общество с ограниченной ответственностью "ВНИИР-Промэлектро" Электромагнитное реле с нормированными параметрами

Also Published As

Publication number Publication date
IT953744B (it) 1973-08-10
BE782929A (fr) 1972-11-03
GB1386011A (en) 1975-03-05
CA934049A (en) 1973-09-18

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AG COMMUNICATION SYSTEMS CORPORATION, 2500 W. UTOP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GTE COMMUNICATION SYSTEMS CORPORATION;REEL/FRAME:005060/0501

Effective date: 19881228