Firma Leopold Kostal

Lothar Worlitz

Eduard Bergmann

Volker Speidel

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.

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Altena, Germany

Lothar Worlitz