GB1320358A - Relay control system - Google Patents

Relay control system

Info

Publication number
GB1320358A
GB1320358A GB5206770A GB5206770A GB1320358A GB 1320358 A GB1320358 A GB 1320358A GB 5206770 A GB5206770 A GB 5206770A GB 5206770 A GB5206770 A GB 5206770A GB 1320358 A GB1320358 A GB 1320358A
Authority
GB
United Kingdom
Prior art keywords
contacts
relay
voltage
contact
coil
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
GB5206770A
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.)
Honeywell Inc
Original Assignee
Honeywell 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 Honeywell Inc filed Critical Honeywell Inc
Publication of GB1320358A publication Critical patent/GB1320358A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • 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
    • H03K3/35—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region
    • H03K3/351—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region the devices being unijunction transistors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Relay Circuits (AREA)

Abstract

1320358 Arc rupturing in switches HONEYWELL Inc 2 Nov 1970 [11 Dec 1969] 52067/70 Heading H1N [Also in Division H3] To prevent erosion of the contacts of a relay having its contacts 42, 43 in an A.C. circuit and its coil 41 energized by a solid state circuit connected by a rectifier to the A.C. source 10, means, e.g. a resistor 26, are provided in the rectifier 22...25 to unbalance the ripple voltage to cause the solid-state circuit to energize the relay to close its contacts at a particular point in the A.C. cycle, so that should contact bounce occur, the arc drawn has the appropriate polarity to avoid transfer of contact material from one contact to the other, the contacts being of dissimilar materials. In the arrangement shown, a capacitor 38 is charged until its voltage exceeds the voltage across the relay coil 41 and interbase resistance of a unijunction transistor 33, the latter voltage being that of an instantaneous low peak voltage as determined by the unbalance of the ripple. As a result, the capacitor can only discharge through the transistor 33 at a point on a given half cycle of the A.C. supply to energize the relay coil so that, for example, if the relay contacts are of tungsten and silver cadmium oxide, the tungsten contact is always the anode when arcing occurs due to contact bounce. The relay may have holding contacts 48, 49.
GB5206770A 1969-12-11 1970-11-02 Relay control system Expired GB1320358A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US88421169A 1969-12-11 1969-12-11

Publications (1)

Publication Number Publication Date
GB1320358A true GB1320358A (en) 1973-06-13

Family

ID=25384186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5206770A Expired GB1320358A (en) 1969-12-11 1970-11-02 Relay control system

Country Status (5)

Country Link
US (1) US3560796A (en)
JP (1) JPS5132343B1 (en)
DE (1) DE2060511A1 (en)
GB (1) GB1320358A (en)
NL (1) NL7018131A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2281644A1 (en) * 1974-08-07 1976-03-05 Fligue Wladimir VOLTMETRIC ASSEMBLY WITH ELECTROMAGNETIC RELAY
DE2643940C3 (en) * 1975-10-02 1979-10-04 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka (Japan) Output regulator for a microwave oven
US4153922A (en) * 1976-12-03 1979-05-08 Hitachi, Ltd. Relay control circuit
US5218509A (en) * 1986-05-30 1993-06-08 Robertshaw Controls Company Electrically operated control device and system for an appliance and method of operating the same
CA1303719C (en) * 1986-12-26 1992-06-16 Hisung Kwon Power source switching circuit
US4939776A (en) * 1988-09-20 1990-07-03 Siemens Transmission Systems, Inc. Logic signal circuit for a releasing relay
US9093885B2 (en) * 2011-11-14 2015-07-28 Regal Beloit America, Inc. Methods and systems for cleaning relay contacts

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1072267A (en) * 1965-09-28 1967-06-14 Devetta Electronics Ltd F Improvements in or relating to the prevention or reduction of arcing at a.c. switch contacts
US3430063A (en) * 1966-09-30 1969-02-25 Nasa Solid state switch

Also Published As

Publication number Publication date
NL7018131A (en) 1971-06-15
DE2060511A1 (en) 1971-07-08
JPS5132343B1 (en) 1976-09-11
US3560796A (en) 1971-02-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees