GB1178910A - Fluid Detection Switch - Google Patents

Fluid Detection Switch

Info

Publication number
GB1178910A
GB1178910A GB44850/67A GB4485067A GB1178910A GB 1178910 A GB1178910 A GB 1178910A GB 44850/67 A GB44850/67 A GB 44850/67A GB 4485067 A GB4485067 A GB 4485067A GB 1178910 A GB1178910 A GB 1178910A
Authority
GB
United Kingdom
Prior art keywords
switch
wattage
coil
sheath
coil portion
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
GB44850/67A
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.)
CROWELL DESIGNS Inc
Original Assignee
CROWELL DESIGNS 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 CROWELL DESIGNS Inc filed Critical CROWELL DESIGNS Inc
Publication of GB1178910A publication Critical patent/GB1178910A/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
    • H01H35/18—Switches operated by change of liquid level or of liquid density, e.g. float switch
    • H01H35/183—Switches operated by change of liquid level or of liquid density, e.g. float switch making use of a thermal switch

Landscapes

  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

1,178,910. Thermal switches. CROWELL DESIGNS Inc. 3 Oct., 1967 [16 Feb., 1967], No. 44850/67. Heading H1N. [Also in Division G1] A temperature responsive switch 10, 11, Fig. 1, is encapsulated with an electric heater 23 whereby the switch is used to detect the level of a liquid due to the thermal element being cooled thereby. The bi-metal snap disc 14 carrying contact 11 is mounted in a terminal 15 encased in a metal sheath 19. The electric heating coil 23 surrounds the sheath 19 and comprises a tapped low-wattage coil portion in permanent circuit across the power supply and a high-wattage coil portion in circuit when the switch 10, 11 is closed. The high-wattage heater coil ensures that the temperature is raised rapidly when there is no liquid detected. The switch is sealed in a capsule 28 of glass or epoxy resin. In a particular application the switch controls a bilge pump in response to the water level.
GB44850/67A 1967-02-16 1967-10-03 Fluid Detection Switch Expired GB1178910A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61658667A 1967-02-16 1967-02-16

Publications (1)

Publication Number Publication Date
GB1178910A true GB1178910A (en) 1970-01-21

Family

ID=24470130

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44850/67A Expired GB1178910A (en) 1967-02-16 1967-10-03 Fluid Detection Switch

Country Status (3)

Country Link
US (1) US3474372A (en)
DE (1) DE1623957A1 (en)
GB (1) GB1178910A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443132A1 (en) * 1978-07-15 1980-06-27 Limitor Ag THERMOSTAT WITH BILAME

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3786463A (en) * 1972-03-20 1974-01-15 Gte Sylvania Inc Fluid level sensor
US3878538A (en) * 1974-04-03 1975-04-15 Gte Sylvania Inc Position sensor with thermal time delay
US3962665A (en) * 1975-02-13 1976-06-08 Ideal Corporation Thermally actuated liquid level sensor
US4086558A (en) * 1976-02-09 1978-04-25 Texas Instruments Incorporated Motor protector and system
IT1160415B (en) * 1977-12-28 1987-03-11 Inoue Japax Res COMMAND AND CONTROL SYSTEM FOR GAS BURNERS
US4224591A (en) * 1978-12-04 1980-09-23 Texas Instruments Incorporated Motor protector with metal housing and with preformed external heater thereon
US4334209A (en) * 1979-05-04 1982-06-08 Gte Products Corporation Glass enclosed three lead circuit breaker
US4486732A (en) * 1982-08-26 1984-12-04 Wells Robert M Ambient compensated motor protector
US4476452A (en) * 1982-09-27 1984-10-09 Texas Instruments Incorporated Motor protector
US4837655A (en) * 1983-07-18 1989-06-06 Gte Products Corporation Overtemperature protector for incandescent lamp
US5200872A (en) * 1989-12-08 1993-04-06 Texas Instruments Incorporated Internal protection circuit for electrically driven device
US5049849A (en) * 1990-08-30 1991-09-17 Texas Instruments Incorporated Circuit breaker
US5303461A (en) * 1993-01-27 1994-04-19 Sundstrand Corporation Thermal protection for electrical machines
US5729416A (en) * 1995-05-30 1998-03-17 General Electric Company Motor starter and protector module
IT1277949B1 (en) * 1995-12-18 1997-11-12 Texas Instr Control And Manufa THERMAL ACTUATOR WITH CONSTANT ACTUATION DELAY AS THE AMBIENT TEMPERATURE CHANGES
US6069551A (en) 1997-05-02 2000-05-30 Therm-O-Disc, Incorporated Thermal switch assembly
CA2233390A1 (en) 1997-05-02 1998-11-02 William F. Quinn Thermal switch assembly
US5844464A (en) * 1997-11-24 1998-12-01 Therm-O-Disc, Incorporated Thermal switch
US6018286A (en) * 1998-11-20 2000-01-25 Therm-O-Disc, Incorporated Thermal switch
US6239686B1 (en) 1999-08-06 2001-05-29 Therm-O-Disc, Incorporated Temperature responsive switch with shape memory actuator
US6342826B1 (en) 1999-08-11 2002-01-29 Therm-O-Disc, Incorporated Pressure and temperature responsive switch assembly
US7209337B2 (en) * 2005-04-19 2007-04-24 Remy International, Inc. Electrical thermal overstress protection device
US20060273876A1 (en) * 2005-06-02 2006-12-07 Pachla Timothy E Over-temperature protection devices, applications and circuits
US9831054B2 (en) * 2014-03-27 2017-11-28 Littelfuse, Inc. Insulated thermal cut-off device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248531A (en) * 1939-03-03 1941-07-08 Richard J Fitz Maurice Thermostat
US2354529A (en) * 1942-06-03 1944-07-25 Edison Inc Thomas A Control device
US2403803A (en) * 1944-09-21 1946-07-09 Gen Electric Electric blanket
US2463891A (en) * 1944-11-30 1949-03-08 Stewart Warner Corp Electric switch
NL291107A (en) * 1962-04-09 1900-01-01
US3335243A (en) * 1965-01-26 1967-08-08 Gen Motors Corp Bimetal indicator device with a heater energized under all operative conditions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2443132A1 (en) * 1978-07-15 1980-06-27 Limitor Ag THERMOSTAT WITH BILAME

Also Published As

Publication number Publication date
US3474372A (en) 1969-10-21
DE1623957A1 (en) 1971-07-22

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