EP 0150600 A3 19850918 - MEMBRANE SWITCH ASSEMBLY
Title (en)
MEMBRANE SWITCH ASSEMBLY
Publication
Application
Priority
US 56427883 A 19831222
Abstract (en)
[origin: EP0150600A2] A membrane switch assembly (10) is comprised of spaced apart layers (12, 16) having corresponding patterns of conductive switch contacts (28, 28 min ) arranged in series thereon, the layers (12, 16) being separated by spacing means (20) having openings therein. The switch contacts (28, 28 min ) on each layer are spaced along a single conductive path (24, 24 min ) so that a regular unit value of impedance means exists between the switch contacts (28, 28 min ). When the electrical circuit is completed by closing a switch site, the resulting total impedance is essentially equal to the sum of the unit values of the impedance means along the circuit path formed by the closed switch.
IPC 1-7
IPC 8 full level
H01H 13/712 (2006.01); H01H 13/70 (2006.01); H01H 13/702 (2006.01)
CPC (source: EP)
H01H 13/702 (2013.01); H01H 2239/012 (2013.01); H01H 2239/02 (2013.01); H01H 2239/026 (2013.01)
Citation (search report)
- [Y] GB 2095036 A 19820922 - SHARP KK
- [A] US 3623080 A 19711123 - SCARBROUGH ALFRED D
- [Y] PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 138 (P-204)[1283], 16th June 1983; & JP-A-58 052 729 (EPUSON K.K.) 29-03-1983
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
EP 0150600 A2 19850807; EP 0150600 A3 19850918; JP S60148019 A 19850805
DOCDB simple family (application)
EP 84308746 A 19841214; JP 26166184 A 19841211