PH11016A - A fail safe control - Google Patents

A fail safe control

Info

Publication number: PH11016A
Authority: PH; Philippines
Prior art keywords: fail safe; safe control; control; fail; safe
Prior art date: 1973-04-08

Application number

PH17037A

Inventor

C Holtkamp

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.)

1974-04-11

Filing date

1973-04-08

Publication date

1977-10-25

1973-04-08 Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp

1977-10-25 Publication of PH11016A publication Critical patent/PH11016A/en

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)
Thermally Actuated Switches (AREA)
Safety Devices In Control Systems (AREA)
Control Of Temperature (AREA)

PH17037A 1974-04-11 1973-04-08 A fail safe control PH11016A (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
PH11016A true PH11016A (en)	1977-10-25

Family

ID=23827956

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
PH17037A PH11016A (en)	1974-04-11	1973-04-08	A 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

1973
- 1973-04-08 PH PH17037A patent/PH11016A/en unknown
1974
- 1974-04-11 US US46025374 patent/US3924142A/en not_active Expired - Lifetime
1975
- 1975-03-11 ZA ZA00751492A patent/ZA751492B/en unknown
- 1975-03-17 CA CA222,250A patent/CA1031399A/en not_active Expired
- 1975-04-04 GB GB1388375A patent/GB1479825A/en not_active Expired
- 1975-04-08 ES ES436405A patent/ES436405A1/en not_active Expired
- 1975-04-09 IT IT4158175A patent/IT1029063B/en active
- 1975-04-11 JP JP4348875A patent/JPS50140667A/ja active Pending

Also Published As

Publication number	Publication date
AU7983975A (en)	1976-10-07
GB1479825A (en)	1977-07-13
ES436405A1 (en)	1977-04-01
US3924142A (en)	1975-12-02
IT1029063B (en)	1979-03-10
JPS50140667A (en)	1975-11-11
CA1031399A (en)	1978-05-16
ZA751492B (en)	1976-02-25

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