GB1175568A - Water Deficiency Safety Device - Google Patents

Water Deficiency Safety Device

Info

Publication number
GB1175568A
GB1175568A GB4185367A GB4185367A GB1175568A GB 1175568 A GB1175568 A GB 1175568A GB 4185367 A GB4185367 A GB 4185367A GB 4185367 A GB4185367 A GB 4185367A GB 1175568 A GB1175568 A GB 1175568A
Authority
GB
United Kingdom
Prior art keywords
tube
rod
switch
coil
energized
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
GB4185367A
Inventor
Hans Lechner
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.)
SAUTER AG
Original Assignee
SAUTER AG
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 SAUTER AG filed Critical SAUTER AG
Publication of GB1175568A publication Critical patent/GB1175568A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0216—Switches actuated by the expansion of a solid element, e.g. wire or rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/42—Applications, arrangements, or dispositions of alarm or automatic safety devices
    • F22B37/44—Applications, arrangements, or dispositions of alarm or automatic safety devices of safety valves
    • F22B37/443—Safety devices extinguishing the fire
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/32—Thermally-sensitive members
    • H01H37/46—Thermally-sensitive members actuated due to expansion or contraction of a solid
    • H01H37/48—Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes

Landscapes

  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermally Actuated Switches (AREA)
  • Resistance Heating (AREA)

Abstract

1,175,568. Thermal switches. FR. SAUTER A.G. 13 Sept., 1967 [13 Sept., 1966], No. 41853/67. Heading H1N. [Also in Division F4] A boiler water deficiency expansion type safety device comprises an inner rod 1 arranged to operate a switch 6 and an outer tube 2, tube 2 having the higher coefficient of expansion and the rod 1 and tube 2 being heated by a coil 8 in insulation 9. Tube 2 is fixed at one end 3 to the switch case 5, and its other closed end is connected to rod 1. Under normal conditions, i.e. when tube 2 is immersed in the boiler water, and coil 8 is energized, rod 1 expands by a greater amount 10 since tube 2 is cooled by the boiler water, and the switch 6 is unoperated, as shown. When coil 8 is energized and there is a water deficiency, the temperatures of rod 1 and tube 2 rise since tube 2 is no longer immersed. Tube 2 expands by a greater amount, which cancels the amount 10, and an adjustable screw 11 thereby operates switch 6 to turn off the firing system and give an alarm. To check under normal conditions, coil 8 is de-energized and the temperatures of rod 1 and tube 2 fall. Rod 1 contracts more and amount 10 is cancelled and the switch 6 is operated.
GB4185367A 1966-09-13 1967-09-13 Water Deficiency Safety Device Expired GB1175568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1330266A CH437357A (en) 1966-09-13 1966-09-13 Low water alarm

Publications (1)

Publication Number Publication Date
GB1175568A true GB1175568A (en) 1969-12-23

Family

ID=4391221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4185367A Expired GB1175568A (en) 1966-09-13 1967-09-13 Water Deficiency Safety Device

Country Status (3)

Country Link
CH (1) CH437357A (en)
DE (1) DE1576832B2 (en)
GB (1) GB1175568A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611868A1 (en) * 1987-02-24 1988-09-09 Cotherm Sa DEVICE FOR HEATING AND CONTROLLING A SPEAKER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2611868A1 (en) * 1987-02-24 1988-09-09 Cotherm Sa DEVICE FOR HEATING AND CONTROLLING A SPEAKER

Also Published As

Publication number Publication date
DE1576832B2 (en) 1970-11-26
DE1576832A1 (en) 1970-06-11
CH437357A (en) 1967-06-15

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees