Infrared key for controlling car alarm - comprises portable battery LED circuit producing precisely defined IR signal detected by fixed lock circuit
FR2498353A1
Electronic code switch for alarm system - has ten pushbuttons controlling combination of inputs to logic gate control
FR2489225A1
Motor vehicle antitheft device using audio feedback detection - uses electronic circuit having quartz crystal audio receiver and transmitter in loop closed by audio feedback, to detect entry to vehicle
FR2453048A1
Road vehicle speed regulation - has carburettor butterfly valve which is controlled by electromagnet and motor
FR2430603A1
Motorcycle fuel gauge involving a manometric chamber - with a fluorocarbon! rubber diaphragm to convert fuel line pressure to a mechanical gauge read-out
FR2411511A1
Constant frequency chopper for variable frequency AC generators - uses astable inverter multivibrator with npn transistor controlling output triac
US4048855A
Liquid level gauge particularly for motorcycle
FR2323150A1
Spark ignition engine angular speed instrument - has galvanometer connected by circuit to contact breaker of ignition system
