GB1397878A - Fluid pressure switch - Google Patents

Fluid pressure switch

Info

Publication number
GB1397878A
GB1397878A GB2258773A GB2258773A GB1397878A GB 1397878 A GB1397878 A GB 1397878A GB 2258773 A GB2258773 A GB 2258773A GB 2258773 A GB2258773 A GB 2258773A GB 1397878 A GB1397878 A GB 1397878A
Authority
GB
United Kingdom
Prior art keywords
contacts
sleeve
tips
cams
switch
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
GB2258773A
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.)
Leafield Engineering Ltd
Original Assignee
Leafield Engineering Ltd
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 Leafield Engineering Ltd filed Critical Leafield Engineering Ltd
Priority to GB2258773A priority Critical patent/GB1397878A/en
Publication of GB1397878A publication Critical patent/GB1397878A/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
    • 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
    • H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Push-Button Switches (AREA)

Abstract

1397878 Fluid actuation of switches; switch contacts LEAFIELDS ENG Ltd 11 May 1973 22587/73 Heading H1N A fluid pressure switch has contacts 22 urged towards movable contact carrier 24 which includes a conductive portion 25 which bridges contacts 22 when the switch is operated, opening of the switch being prevented by a projection 33 on carrier 24 engaging ends 28 of contacts 22. As shown, fluid pressure through connector 12 depresses bellows 14, 15 which depresses sleeve 24 (the undepressed position being shown in the top half of Fig. 1, the depressed position being shown in the bottom half of Fig. 1). Depression of sleeve 24 moves conductive portion 25 to bridge contact tips 28 of spring contacts 22. This is achieved by cams 33 on sleeve 24 forcing tips 28 away from sleeve 24 so that tips 28 ride over cams 33 till they pass their right-hand edges when they snap down on to portions 25 behind cams 33 to prevent return of sleeve 24 when the fluid pressure decreases. Tips 28 are locked against portions 25 by sleeve 24 being urged to the right by spring 27 so that cams 33 force tips 28 into sloping recesses 32 in fixed member 20 thus locking tips 28 against portions 25. There are two pairs of contacts 22, one shown in the top half of Fig. 2 and one, not shown, in the bottom half, each pair being bridged by a portion 25. To open the contacts, cover 11 must be removed and access gained to contacts 22 which are moved away from beneath cams 33 by a tool.
GB2258773A 1973-05-11 1973-05-11 Fluid pressure switch Expired GB1397878A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2258773A GB1397878A (en) 1973-05-11 1973-05-11 Fluid pressure switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2258773A GB1397878A (en) 1973-05-11 1973-05-11 Fluid pressure switch

Publications (1)

Publication Number Publication Date
GB1397878A true GB1397878A (en) 1975-06-18

Family

ID=10181852

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2258773A Expired GB1397878A (en) 1973-05-11 1973-05-11 Fluid pressure switch

Country Status (1)

Country Link
GB (1) GB1397878A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408842A2 (en) * 1989-07-18 1991-01-23 Leybold Aktiengesellschaft On-off switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408842A2 (en) * 1989-07-18 1991-01-23 Leybold Aktiengesellschaft On-off switch
EP0408842A3 (en) * 1989-07-18 1991-11-27 Leybold Aktiengesellschaft On-off switch

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Legal Events

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