GB2272573B - Improvements in or relating to keypad assemblies - Google Patents

Improvements in or relating to keypad assemblies

Info

Publication number
GB2272573B
GB2272573B GB9221733A GB9221733A GB2272573B GB 2272573 B GB2272573 B GB 2272573B GB 9221733 A GB9221733 A GB 9221733A GB 9221733 A GB9221733 A GB 9221733A GB 2272573 B GB2272573 B GB 2272573B
Authority
GB
United Kingdom
Prior art keywords
relating
keypad assemblies
keypad
assemblies
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
GB9221733A
Other versions
GB2272573A (en
GB9221733D0 (en
Inventor
Alan Dewhurst
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.)
DEWHURST PLC
Original Assignee
DEWHURST PLC
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 DEWHURST PLC filed Critical DEWHURST PLC
Priority to GB9221733A priority Critical patent/GB2272573B/en
Publication of GB9221733D0 publication Critical patent/GB9221733D0/en
Publication of GB2272573A publication Critical patent/GB2272573A/en
Application granted granted Critical
Publication of GB2272573B publication Critical patent/GB2272573B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/32—Belleville-type springs
    • 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
    • H01H13/705—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 characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2215/00—Tactile feedback
    • H01H2215/034—Separate snap action
    • H01H2215/036—Metallic disc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2217/00—Facilitation of operation; Human engineering
    • H01H2217/016—Pressure reduction membrane; Spreader layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/002—Casings sealed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2223/00—Casings
    • H01H2223/01—Mounting on appliance
    • H01H2223/024—Screw
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2229/00—Manufacturing
    • H01H2229/02—Laser
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2231/00—Applications
    • H01H2231/006—Bank automat; Cash register; Vending machine
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/038—Anti-vandalism

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Push-Button Switches (AREA)
GB9221733A 1992-10-16 1992-10-16 Improvements in or relating to keypad assemblies Expired - Fee Related GB2272573B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9221733A GB2272573B (en) 1992-10-16 1992-10-16 Improvements in or relating to keypad assemblies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9221733A GB2272573B (en) 1992-10-16 1992-10-16 Improvements in or relating to keypad assemblies

Publications (3)

Publication Number Publication Date
GB9221733D0 GB9221733D0 (en) 1992-12-02
GB2272573A GB2272573A (en) 1994-05-18
GB2272573B true GB2272573B (en) 1996-11-13

Family

ID=10723544

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9221733A Expired - Fee Related GB2272573B (en) 1992-10-16 1992-10-16 Improvements in or relating to keypad assemblies

Country Status (1)

Country Link
GB (1) GB2272573B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2047491B1 (en) * 2006-07-19 2013-07-17 Eoz Operation key for a keyboard for the human-machine interface

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077498A (en) * 1980-02-13 1981-12-16 Plessey Co Ltd Push button key modules
GB2143375A (en) * 1983-06-15 1985-02-06 Nitsuko Ltd Key switch devices with key guide means
US4849852A (en) * 1988-09-30 1989-07-18 Alps Electric (U.S.A.), Inc. Variable capacitance push-button switch
GB2213644A (en) * 1987-12-11 1989-08-16 Diehl Gmbh & Co A keyboard for electrical appliances
GB2239352A (en) * 1989-12-22 1991-06-26 Starpoint Electrics Ltd Push button switch mounting
US5120923A (en) * 1989-10-06 1992-06-09 Takafumi Kato Push button switch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077498A (en) * 1980-02-13 1981-12-16 Plessey Co Ltd Push button key modules
GB2143375A (en) * 1983-06-15 1985-02-06 Nitsuko Ltd Key switch devices with key guide means
GB2213644A (en) * 1987-12-11 1989-08-16 Diehl Gmbh & Co A keyboard for electrical appliances
US4849852A (en) * 1988-09-30 1989-07-18 Alps Electric (U.S.A.), Inc. Variable capacitance push-button switch
US5120923A (en) * 1989-10-06 1992-06-09 Takafumi Kato Push button switch
GB2239352A (en) * 1989-12-22 1991-06-26 Starpoint Electrics Ltd Push button switch mounting

Also Published As

Publication number Publication date
GB2272573A (en) 1994-05-18
GB9221733D0 (en) 1992-12-02

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Legal Events

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

Effective date: 20081016