GB1531265A - Method of fluid-pressure control - Google Patents

Method of fluid-pressure control

Info

Publication number
GB1531265A
GB1531265A GB45894/75A GB4589475A GB1531265A GB 1531265 A GB1531265 A GB 1531265A GB 45894/75 A GB45894/75 A GB 45894/75A GB 4589475 A GB4589475 A GB 4589475A GB 1531265 A GB1531265 A GB 1531265A
Authority
GB
United Kingdom
Prior art keywords
pressure
switch
boiler
leak
bellows
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
GB45894/75A
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.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Publication of GB1531265A publication Critical patent/GB1531265A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B5/00—Transducers converting variations of physical quantities, e.g. expressed by variations in positions of members, into fluid-pressure variations or vice versa; Varying fluid pressure as a function of variations of a plurality of fluid pressures or variations of other quantities

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

1531265 Pressure sensors DANFOSS AS 5 Nov 1975 [6 Nov 1974] 45894/75 Heading G1L A fluid-pressure control device which operates a micro-switch 18 when the pressure in boiler 2 falls sufficiently, includes a sealed chamber defined by two hollow resilient members 11, 19 the effective area D 1 of the member 11 being greater than that D 2 of the chamber, the pressure in the chamber being below ambient whereby a leak in either member also causes the device to operate the micro-switch. When either the boiler pressure falls or a leak occurs the force on the spring 16 decreases and the arm 15 is pushed down to turn the switch 18 off. However, if a leak occurs when the boiler pressure is too high, the spring will not be able to move the arm against the pressure. In this case a second device 4 is used to open a second switch 38 when excess pressure occurs. This device also includes a protective bellows 31 outside bellows 27. A leak in either bellows also causes the switch 38 to be opened unless boiler pressure is too low; however this is detected by the first device.
GB45894/75A 1974-11-06 1975-11-05 Method of fluid-pressure control Expired GB1531265A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742452562 DE2452562B2 (en) 1974-11-06 1974-11-06 PRESSURE MONITORING DEVICE

Publications (1)

Publication Number Publication Date
GB1531265A true GB1531265A (en) 1978-11-08

Family

ID=5930124

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45894/75A Expired GB1531265A (en) 1974-11-06 1975-11-05 Method of fluid-pressure control

Country Status (6)

Country Link
JP (1) JPS5759611B2 (en)
DE (1) DE2452562B2 (en)
DK (1) DK500275A (en)
FR (1) FR2290592A1 (en)
GB (1) GB1531265A (en)
SE (1) SE418776B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024729A2 (en) * 1979-08-31 1981-03-11 Siemens Aktiengesellschaft Device for securing to a base plate pneumatic construction parts exposable to pressure
CN106783381A (en) * 2016-12-27 2017-05-31 中山市博安泰电器科技有限公司 A kind of pressure switch of high voltage protective

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4273150A (en) * 1979-11-26 1981-06-16 United Technologies Corporation Leverless pressure transducer
DE8707812U1 (en) * 1987-06-02 1987-08-27 Alexander Wiegand Gmbh U. Co Armaturen- U. Manometerfabrik, 8763 Klingenberg Pressure switch
IT1220752B (en) * 1988-05-16 1990-06-21 Zanussi A Spa Industrie SAFETY DEVICE FOR THERMOSTAT, APPLICABLE IN PARTICULAR IN WASHING MACHINES, DISHWASHER OR SIMILAR MACHINES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024729A2 (en) * 1979-08-31 1981-03-11 Siemens Aktiengesellschaft Device for securing to a base plate pneumatic construction parts exposable to pressure
EP0024729A3 (en) * 1979-08-31 1981-12-30 Siemens Aktiengesellschaft Device for securing to a base plate pneumatic construction parts exposable to pressure
CN106783381A (en) * 2016-12-27 2017-05-31 中山市博安泰电器科技有限公司 A kind of pressure switch of high voltage protective

Also Published As

Publication number Publication date
DK500275A (en) 1976-05-07
JPS5169177A (en) 1976-06-15
DE2452562B2 (en) 1978-01-26
FR2290592A1 (en) 1976-06-04
SE7512394L (en) 1976-05-07
SE418776B (en) 1981-06-22
FR2290592B1 (en) 1981-04-30
JPS5759611B2 (en) 1982-12-15
DE2452562A1 (en) 1976-05-20

Similar Documents

Publication Publication Date Title
GB1531265A (en) Method of fluid-pressure control
ES8107412A1 (en) Vacuum switch
GB928422A (en) High precision pressure standard
GB1077825A (en) Fluid pressure-responsive devices
GB1228400A (en)
GB1390173A (en) Pressure switch
GB965119A (en) Pressure responsive devices
GB1014760A (en) pneumatic-pressure-responsive electric switch
GB1265693A (en)
GB1335255A (en) Fluid pressure responsive device
ES353853A1 (en) Differential pressure sensitive switch
GB889761A (en) Improvements in snap action device
GB1498828A (en) Electrical switch devices
GB647445A (en) Improvements in fluid pressure operated electric switches
GB1479825A (en) Fail-safe thermostat
GB1422645A (en) Thermal switch
GB1506681A (en) Fluid-pressure responsive switch
GB1481293A (en) Rotary piston compressor
GB1448556A (en) Differential pressure responsive device
GB1439969A (en) High-low pressure responsive pilot valve structure
GB1421745A (en) Pressure control vavles
GB1008218A (en) Quick release coupling or connector
GB2001201A (en) A pressure-responsive control device
GB859636A (en) Improvements in or relating to fluid-pressure-operated instruments
GB1077466A (en) Pressure-responsive devices and methods of making the same

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee