EP 0063686 B1 19840905 - SWITCHING CIRCUIT WITH A BLOCK OF KEYS
Title (en)
SWITCHING CIRCUIT WITH A BLOCK OF KEYS
Publication
Application
Priority
DE 3116941 A 19810429
Abstract (en)
[origin: US4484180A] The identification of the last-actuated of a plurality of parallel connected switches is provided by energizing a light source associated with the last-actuated switch and by providing a coded output signal which identifies the switch. The identification of a closed switch is accomplished through the use of logic circuitry which periodically imposes a potential difference across all of the switch associated light sources. The potential difference is sensed via the closed switch and functions as an initiation signal which causes generation of a coded output signal and maintains energization of the light source.
IPC 1-7
IPC 8 full level
G10H 1/18 (2006.01); G10H 1/22 (2006.01); G10H 1/32 (2006.01); H03K 17/00 (2006.01)
CPC (source: EP US)
G10H 1/182 (2013.01 - EP US); G10H 1/22 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
EP 0063686 A1 19821103; EP 0063686 B1 19840905; DE 3116941 A1 19821125; DE 3260644 D1 19841011; JP S57189195 A 19821120; US 4484180 A 19841120
DOCDB simple family (application)
EP 82101939 A 19820311; DE 3116941 A 19810429; DE 3260644 T 19820311; JP 7247982 A 19820428; US 37230982 A 19820427