GB852160A - Improvements in or relating to pressure sensing electric switches - Google Patents

Improvements in or relating to pressure sensing electric switches

Info

Publication number
GB852160A
GB852160A GB28634/56A GB2863456A GB852160A GB 852160 A GB852160 A GB 852160A GB 28634/56 A GB28634/56 A GB 28634/56A GB 2863456 A GB2863456 A GB 2863456A GB 852160 A GB852160 A GB 852160A
Authority
GB
United Kingdom
Prior art keywords
bellows
relating
pressure sensing
electric switches
sensing electric
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
GB28634/56A
Inventor
Harry Balshaw Caldwell
Nathaniel Borsack
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.)
Normalair Ltd
Original Assignee
Normalair 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 Normalair Ltd filed Critical Normalair Ltd
Publication of GB852160A publication Critical patent/GB852160A/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
    • H01H35/32—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)
  • Fluid-Damping Devices (AREA)

Abstract

852,160. Pneumatic actuation of switches. NORMALAIR Ltd. Aug. 20, 1957 [Sept. 19, 1956], No. 28634/56. Class 38 (5). Contacts 8, 9 are closed by bellows 2 upon a predetermined drop in external air pressure communicated to the chamber 15 via duct 17. Internal opposed abutments 18, 19 preload the bellows 2 such that movement only occurs near the predetermined operational pressure. The contact 8 is mounted on an arm 5 pivoted at 6 and carrying a balance weight 7 to counteract externally applied acceleration forces. Expansion of bellows 2 is limited by contact 8, 9 acting as stops.
GB28634/56A 1956-09-19 1956-09-19 Improvements in or relating to pressure sensing electric switches Expired GB852160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB342270X 1956-09-19

Publications (1)

Publication Number Publication Date
GB852160A true GB852160A (en) 1960-10-26

Family

ID=10362985

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28634/56A Expired GB852160A (en) 1956-09-19 1956-09-19 Improvements in or relating to pressure sensing electric switches

Country Status (3)

Country Link
CH (1) CH342270A (en)
FR (1) FR1182071A (en)
GB (1) GB852160A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9809313B2 (en) 2007-01-22 2017-11-07 Honeywell International Inc. Cabin altitude alerting systems and methods

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0940833B1 (en) * 1998-03-05 2002-07-03 Frédéric Piguet S.A. Calendar mechanism for watch movement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9809313B2 (en) 2007-01-22 2017-11-07 Honeywell International Inc. Cabin altitude alerting systems and methods

Also Published As

Publication number Publication date
CH342270A (en) 1959-11-15
FR1182071A (en) 1959-06-22

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