EP 0133817 A2 19850306 - Membrane switches.
Title (en)
Membrane switches.
Title (de)
Membranschalter.
Title (fr)
Interrupteurs à membrane.
Publication
Application
Priority
GB 8321689 A 19830811
Abstract (en)
A membrane switch panel has a printed circuit base board (20) carrying bare copper electrical circuitry (26) and contacts (26 & 28). A flexible, non-elastomer, laminar membrane (22) overlays the board (20) and also carries a bare-copper contact (24). An electrically insulating spacer (3) is provided between the board (20) and the membrane, but it is provided with an opening to allow the contact (24) upon local depression of the membrane to bridge the contacts (26 & 28) in the base board (20). The membrane (22) is adhesively sealed to the base board (20) enclosing an atmosphere of limited tarnishing ability for the contacts (20, 26 & 28) to maintain a low contact resistance and allow non-precious metals to be used for contacts.
IPC 1-7
IPC 8 full level
H01H 13/702 (2006.01); H01H 13/785 (2006.01)
CPC (source: EP)
H01H 13/702 (2013.01); H01H 13/785 (2013.01); H01H 2201/026 (2013.01); H01H 2201/03 (2013.01); H01H 2207/02 (2013.01); H01H 2209/032 (2013.01); H01H 2209/076 (2013.01); H01H 2229/002 (2013.01); H01H 2229/008 (2013.01); H01H 2229/016 (2013.01); H01H 2229/028 (2013.01); H01H 2229/038 (2013.01); H01H 2239/008 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0133817 A2 19850306; EP 0133817 A3 19850410; GB 2144917 A 19850313; GB 8321689 D0 19830914; GB 8420140 D0 19840912; WO 8500923 A1 19850228
DOCDB simple family (application)
EP 84305404 A 19840808; GB 8321689 A 19830811; GB 8400274 W 19840808; GB 8420140 A 19840808