Preh-werke Gmbh Co. Kg

Gottfried Berthold

Hans-Michael Schmitt

Anton Ruettiger

Peter Ambros

Juergen Bach

Rudolf Limpert

Friedhard Fehr

Walter Muller

A capacitive sensor for detecting surface condensation which includes a carrier ( ), a metal layer ( ) applied to the carrier ( ) to form an interdigital structure, a passivation layer ( ) formed over the metal layer ( ), and a hydrophilic layer ( ) applied over the passivation layer ( ), where the hydrophilic layer ( ) increases a surface tension of the passivation layer ( ).

Capacitive sensor for detecting surface condensation

A diode mount for an LED (2) with a plug connector (3) and compensating resistor (4) is manufactured by injection molding a one piece housing and mounting an LED and plug connector therein. An electrical connection between the LED and the plug connector, as well as a mechanical fixing, is accomplished by an electrically-conductive paste (5). At the same time, the electrically-conductive paste forms the compensating resistor.

Diode mount for an led with a plug connector and compensating resistor,

A rotary potentiometer having a cylindrical or partially cylindrical resistance track and at least one electrode pair arranged at the resistance track's edges which are parallel to the cylinder axis. A tap is fixed to an adjusting component which is rotatable around and movable along the cylinder axis. The axial breadth of the resistance track correspondsd substantially to the stroke of the adjusting component along the cylinder axis. At the circumferential edges of the resistance track, at least one second electrode pair is arranged.

Rotary potentiometer

A data input board for the electrical detection of the coordinates of a writing tip includes a rigid plate and an elastic plate with electrically conductive surfaces facing each other at a small distance which contact point by point under the effect of a writing tip. The elastic plate is formed as a stretched, coated sieve tissue in order to avoid the requirement of spacers within the input surface.

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Reutlingen, Germany

Gottfried Berthold