EP 0109159 A1 19840523 - Pressure sensitive switchmats.
Title (en)
Pressure sensitive switchmats.
Title (de)
Druckbeeinflusste Kontaktmatte.
Title (fr)
Tapis contacteur sensible à la pression.
Publication
Application
Priority
GB 8228024 A 19820930
Abstract (en)
An electrical switchmat having a normally open switch which is closed under a predetermined minimum load, the switchmat comprising a first metal sheet 3 separated from a load-bearing sheet 2 having an electrically conductive surface by resiliently compressible, non-conductive materials 5 and 7, and a plurality of bridging elements 6 positioned between the sheets such that when at least said predetermined minimum load is applied to the loadbearing sheet 2, the non-conductive material 5 and 7 compresses and one or more of the bridging elements establishes a conductive path between the sheets, the load-bearing sheet 2 being substantially rigid under the intended operating load of the switchmat and the bridging elements 6 being constructed and arranged such that when the load-bearing sheet is subjected to substantial overload, it is supported by the bridging elements 6 thereby preventing damage to the non-conductive materials 5 and 7.
IPC 1-7
IPC 8 full level
H01H 3/14 (2006.01)
CPC (source: EP)
H01H 3/141 (2013.01)
Citation (search report)
- [Y] DE 2148760 A1 19730405 - SIEMENS AG
- [Y] US 2951921 A 19600906 - WIKKERINK LANCE A
- [A] GB 392936 A 19330525 - JOSEPH PEARSON, et al
- [A] US 3812313 A 19740521 - WOLF W, et al
- [A] FR 2431178 A1 19800208 - SEGALL JACQUES [FR]
- [A] FR 1416570 A 19651105
- [AD] US 3825277 A 19740723 - STEINBACK C
- [A] US 1775755 A 19300916 - FORMAN PARIS R
Designated contracting state (EPC)
DE FR IT NL
DOCDB simple family (publication)
EP 0109159 A1 19840523; EP 0109159 B1 19860820; DE 3365466 D1 19860925; GB 2128031 A 19840418; GB 2128031 B 19860625; GB 8326135 D0 19831102
DOCDB simple family (application)
EP 83305906 A 19830929; DE 3365466 T 19830929; GB 8326135 A 19830929