SE309686B - - Google Patents

Info

Publication number
SE309686B
SE309686B SE8624/66A SE862466A SE309686B SE 309686 B SE309686 B SE 309686B SE 8624/66 A SE8624/66 A SE 8624/66A SE 862466 A SE862466 A SE 862466A SE 309686 B SE309686 B SE 309686B
Authority
SE
Sweden
Prior art keywords
liquid
mercury
contacts
switch
heater
Prior art date
Application number
SE8624/66A
Inventor
P Novas
R Ernst
Original Assignee
Vapor 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 Vapor Corp filed Critical Vapor Corp
Publication of SE309686B publication Critical patent/SE309686B/xx

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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
    • G01F23/246—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices
    • G01F23/247—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid thermal devices for discrete levels
    • G01F23/248—Constructional details; Mounting of probes

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Thermally Actuated Switches (AREA)
  • Emergency Alarm Devices (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Level Indicators Using A Float (AREA)

Abstract

1,076,268. Mercury switches. VAPOR CORPORATION. March 24, 1966 [Aug. 2, 1965], No. 13025/66. Heading H2B. Excessive temperature, at low level, of a liquid is sensed by a mercury contact thermometer 20 having contacts 28, 30 which are connected when the mercury expands. A heater coil 42 normally maintains a certain temperature at which the contacts are open, but the absence of liquid around the switch causes the switch to close because the heater cannot then dissipate some of its output into the liquid.
SE8624/66A 1965-08-02 1966-06-23 SE309686B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US476341A US3329787A (en) 1965-08-02 1965-08-02 Temperature and level sensor with heater and heat transfer means

Publications (1)

Publication Number Publication Date
SE309686B true SE309686B (en) 1969-03-31

Family

ID=23891457

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8624/66A SE309686B (en) 1965-08-02 1966-06-23

Country Status (4)

Country Link
US (1) US3329787A (en)
DE (1) DE1523425A1 (en)
GB (1) GB1076268A (en)
SE (1) SE309686B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3859645A (en) * 1973-06-04 1975-01-07 Gte Sylvania Inc Temperature compensated fluid level sensor
EP0474905A1 (en) * 1990-09-13 1992-03-18 VDO Adolf Schindling AG Level switch

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1560119A (en) * 1921-09-12 1925-11-03 Cutler Hammer Mfg Co Thermally-operated circuit controller
US2158146A (en) * 1937-09-20 1939-05-16 Vapor Car Heating Co Inc Thermostat
US2619566A (en) * 1949-08-25 1952-11-25 Charles F Mahoney Actuating apparatus responsive to change in liquid level
NL230347A (en) * 1957-08-09

Also Published As

Publication number Publication date
US3329787A (en) 1967-07-04
DE1523425A1 (en) 1969-02-20
GB1076268A (en) 1967-07-19

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