GB2248343B - Pressurisation protection system with keyboard - Google Patents

Pressurisation protection system with keyboard

Info

Publication number
GB2248343B
GB2248343B GB9120558A GB9120558A GB2248343B GB 2248343 B GB2248343 B GB 2248343B GB 9120558 A GB9120558 A GB 9120558A GB 9120558 A GB9120558 A GB 9120558A GB 2248343 B GB2248343 B GB 2248343B
Authority
GB
United Kingdom
Prior art keywords
pressurisation
keyboard
protection system
protection
pressurisation protection
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 - Fee Related
Application number
GB9120558A
Other versions
GB9120558D0 (en
GB2248343A (en
Inventor
Michael L Firth
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.)
Telektron Ltd
Original Assignee
Telektron 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 Telektron Ltd filed Critical Telektron Ltd
Publication of GB9120558D0 publication Critical patent/GB9120558D0/en
Publication of GB2248343A publication Critical patent/GB2248343A/en
Application granted granted Critical
Publication of GB2248343B publication Critical patent/GB2248343B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/01—Mounting on appliance
    • H01H2223/014—Mounting on appliance located in recess
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/044—Protecting cover
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2237/00—Mechanism between key and laykey
    • H01H2237/008—Plunger guided by flexible arms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
    • H01H9/042—Explosion-proof cases
GB9120558A 1990-09-28 1991-09-27 Pressurisation protection system with keyboard Expired - Fee Related GB2248343B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909021188A GB9021188D0 (en) 1990-09-28 1990-09-28 Membranes keyboard for pressurisation protection systems

Publications (3)

Publication Number Publication Date
GB9120558D0 GB9120558D0 (en) 1991-11-06
GB2248343A GB2248343A (en) 1992-04-01
GB2248343B true GB2248343B (en) 1994-04-27

Family

ID=10682940

Family Applications (2)

Application Number Title Priority Date Filing Date
GB909021188A Pending GB9021188D0 (en) 1990-09-28 1990-09-28 Membranes keyboard for pressurisation protection systems
GB9120558A Expired - Fee Related GB2248343B (en) 1990-09-28 1991-09-27 Pressurisation protection system with keyboard

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB909021188A Pending GB9021188D0 (en) 1990-09-28 1990-09-28 Membranes keyboard for pressurisation protection systems

Country Status (1)

Country Link
GB (2) GB9021188D0 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994018686A1 (en) * 1993-02-03 1994-08-18 A-Dec, Inc. Control panel with sealed switch keypad
IT235022Y1 (en) * 1994-05-20 2000-03-31 Zanussi Elettrodomestici REFRIGERATOR OR FREEZER WITH ANTI-COMBUSTION PANEL
DE102008018074A1 (en) * 2008-04-09 2009-10-15 Emerson Process Management Gmbh & Co. Ohg Explosion-proof control arrangement with an explosion-proof housing
US9307816B2 (en) * 2013-09-04 2016-04-12 Apple Inc. Accessory covers for mobile phones or other consumer electronic devices

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1274162A (en) * 1970-02-16 1972-05-17 Ibm An electrical keyboard
GB1527920A (en) * 1975-03-31 1978-10-11 Chomerics Inc Keyboard
GB2165696A (en) * 1984-10-11 1986-04-16 Immediate Business Systems Plc Keyboards
US4649246A (en) * 1983-02-01 1987-03-10 Hand Widmaier Fabrik Fur Apparate Der Fernmelde -Und Feinwerktechnik Keyboard for initiating switching operations or switching signals associated with respective symbols on the surfaces of the keys
GB2234115A (en) * 1989-05-23 1991-01-23 Moulinex Sa A switch keyboard for the control panel of an electrical appliance

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1274162A (en) * 1970-02-16 1972-05-17 Ibm An electrical keyboard
GB1527920A (en) * 1975-03-31 1978-10-11 Chomerics Inc Keyboard
US4649246A (en) * 1983-02-01 1987-03-10 Hand Widmaier Fabrik Fur Apparate Der Fernmelde -Und Feinwerktechnik Keyboard for initiating switching operations or switching signals associated with respective symbols on the surfaces of the keys
GB2165696A (en) * 1984-10-11 1986-04-16 Immediate Business Systems Plc Keyboards
GB2234115A (en) * 1989-05-23 1991-01-23 Moulinex Sa A switch keyboard for the control panel of an electrical appliance

Also Published As

Publication number Publication date
GB9120558D0 (en) 1991-11-06
GB2248343A (en) 1992-04-01
GB9021188D0 (en) 1990-11-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030927