Firma Leopold Kostal

Other

Volker Speidel

Eduard Bergmann

Werner-Ernst Berginski

Lothar Worlitz

Klaus Kassner

Circuit arrangement for monitoring an electricity-consuming load fed with direct current one terminal of which is grounded, particularly for monitoring an incandescent of an automotive vehicle, and the circuit arrangement being installable without interfering with the existing network of lines or cutting conductors. Between the switch of the load and the current-consuming device a measurement coil is arranged parallel to a conductor within the magnetic field produced by the flow of electricity through the conductor, the input of the coil being connected to a voltage supply source and its output being connected in a Schmitt trigger circuit with the non-inverting input of a differential amplifier constituted as operational amplifier and the output of the amplifier being fed back via a resistor to the non-inverting input and being connected to a fault indicator.

Circuit arrangement for monitoring a current-consuming load

An electrical circuit providing a light passing signal function obtained by means of a single push switch independently of whether the low beam switch is open or closed. An electronic system controlled by the push switch and the low beam switch is provided for controlling the high beam contact of the relay and when the low beam is disconnected the electronic system closes the relay contact as a function of the length of time of the closure of the push switch and when the low beam is connected the relay contact is also closed as a function of the length of time of the closure of the push switch.

Automotive vehicle switching electric circuit

An electric circuit arrangement to replace the combined pushing and locking electric switch of the type used in DC fed automobile blinker systems, characterized by a signal detection unit controlled by a push switch and comprising a timer member, an integrating member and a bi-stable storage member whose output controls a blinker relay or subsequent electric component. Actuation of the push switch generates a pulse which directly controls a flip-flop and a timer member as a function of the length of time of actuation of the push switch, the length of such time in relation to the setting of the timer acting to set or re-set the flip-flop. Two push switches are provided which control the timer and two bi-stable flip-flops whose outputs are cross-coupled.

Electric circuit arrangement for replacement of an electric switch, with

Device for resetting a direction-of-travel indicator for automobiles after completing a curve providing in association with the turnable steering-column/steering-wheel unit and in fixed position thereto switch elements, particularly opto-electrical transmitters and receivers coverable by a mask turnable with the steering-column/steering-wheel unit which when the steering wheel is turned back after going around a curve disconnects the directional indicator which has been actuated by a push switch and a scanning of the direction of rotation takes place. The device is characterized by a digital evaluation electronic system which satisfies a series of sequential conditions.

Device for resetting a direction-of-travel indicator in automobiles

An opto-electronical switching device provided with an operating push-button key, particularly for motor vehicles, comprises a housing, containing a photodiode and a phototransistor, a rectangular push-button key, guided in the housing, with aperture plate and with an after-connected interrogating circuit, responding to the switching condition of the phototransistor. A rectangular leaf spring, curved transversely to the longitudinal direction, supported with its corners upon ribs of the push-button key inner surface and curved away from the push-button key inner surface, and the counter-support of the leaf spring is formed by a pin in the geometrical mid-point.

Growing community of inventors

Schalksmuhle, Germany

Volker Speidel