ES436405A1 - Fail-safe control - Google Patents

Fail-safe control

Info

Publication number
ES436405A1
ES436405A1 ES436405A ES436405A ES436405A1 ES 436405 A1 ES436405 A1 ES 436405A1 ES 436405 A ES436405 A ES 436405A ES 436405 A ES436405 A ES 436405A ES 436405 A1 ES436405 A1 ES 436405A1
Authority
ES
Spain
Prior art keywords
control
fail
snap
safe control
condition responsive
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
ES436405A
Other languages
Spanish (es)
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of ES436405A1 publication Critical patent/ES436405A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2671—Means to detect leaks in the pressure sensitive element
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/275—Control of temperature characterised by the use of electric means with sensing element expanding, contracting, or fusing in response to changes of temperature
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0019—Circuit arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Resistance Heating (AREA)
  • Safety Devices In Control Systems (AREA)
  • Thermally Actuated Switches (AREA)
  • Control Of Temperature (AREA)

Abstract

A control of the type having a bistable mechanism operable in accordance with condition responsive means to affect opening and closing of snap-acting switch means series connected to directly control an electrical operation including means for providing fail-safe operation of the control which assure that the snap-acting switch means is in an open or non-energizing position upon failure of the condition responsive means.
ES436405A 1974-04-11 1975-04-08 Fail-safe control Expired ES436405A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46025374 US3924142A (en) 1974-04-11 1974-04-11 Fail-safe control

Publications (1)

Publication Number Publication Date
ES436405A1 true ES436405A1 (en) 1977-04-01

Family

ID=23827956

Family Applications (1)

Application Number Title Priority Date Filing Date
ES436405A Expired ES436405A1 (en) 1974-04-11 1975-04-08 Fail-safe control

Country Status (8)

Country Link
US (1) US3924142A (en)
JP (1) JPS50140667A (en)
CA (1) CA1031399A (en)
ES (1) ES436405A1 (en)
GB (1) GB1479825A (en)
IT (1) IT1029063B (en)
PH (1) PH11016A (en)
ZA (1) ZA751492B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815987C2 (en) * 1978-04-13 1986-02-06 E.G.O. Elektro-Geräte AG, Zug Temperature controller
US4825047A (en) * 1987-05-07 1989-04-25 Thermafoil Products Inc. Temperature-responsive controller for waterbed mattress heaters
US6525298B1 (en) * 2001-10-01 2003-02-25 Barney D. Hunts Towel warmer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686250A (en) * 1951-11-02 1954-08-10 Gen Electric Electric heating apparatus

Also Published As

Publication number Publication date
ZA751492B (en) 1976-02-25
PH11016A (en) 1977-10-25
JPS50140667A (en) 1975-11-11
CA1031399A (en) 1978-05-16
AU7983975A (en) 1976-10-07
GB1479825A (en) 1977-07-13
IT1029063B (en) 1979-03-10
US3924142A (en) 1975-12-02

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