Preh Elektrofeinmechanische Werke Jakob Preh Nachf Gmbh & Co.

Preh Gmbh

Preh-werke Gmbh Co. Kg

Pren Elektrofeinmecahnische Wereke Jakob Preh Nachf. Gmbh & Co.

Gerold Eckert

Karl-Heinz Bauer

Joachim Storath

Anton Ruettiger

Haiko Glienicke

Thomas Ofenhitzer

Oliver Zegula

Reinhold Wolf

Edgar Maisch

Klaus Mueller

Wolfgang Labude

Anton R Uttiger

Rudiger Maidhof

Thilo Kirchner

Martin Vorndran

A control element including at least four switches for electrical/electronic functions having a precise guidance for operation, where mount arms are disposed in a cross shape on their underside on a tip disposed in a housing, and on their top side in a spherical shell, and a pin is attached to the housing in each corner formed by the arms.

Control element for a motor vehicle

A control element for a motor vehicle is disclosed that includes at least one rotary actuator and one actuating element integrated in the rotary actuator, whereby the actuating element can be moved relative to the rotary actuator, and whereby a connecting member, which interacts with an optical system, is molded to the actuating element. A connecting member extends into the optical system such that the deflection of the actuating element can be evaluated as a signal by the optical system. The optical system includes at least one light-emitting and at least one light-absorbing light guide element, whereby one light guide element is arranged on one side of the connecting member and one light guide element is arranged outside the connecting member so that a deflection of the actuating element is analogous to the absorption of light.

Rotary actuator with light guides and photo-sensor

An operational control is provided for setting an actuating variable, more particularly a set point for a motor vehicle air conditioner, having a rotary knob, having at least two contact tracks and one elastic wiper contact element that is in contact by means of at least one wiper contact with a contact track, wherein the contact tracks are joined to the rotary knob so as to be nonrotatable with respect thereto and in that the wiper contact elements are provided with an additional elastic wiper contact facing the printed circuit board.

Operational control having a spring wiper contact

A method for manufacturing housing or control-components parts of metal including the steps of: manufacturing a housing or control-component part ( ) as a forged or cast blank ( ), stamping a recess ( ) in the blank for an indicator insert with a stamping die in a stamping device, thereby creating a protrusion ( ) on a back wall surface ( ) of the part in the stamping direction, constricting the recess ( ) with peeled protrusions of the peripheral walls ( ) defining the recess ( ), injecting a transparent plastic ( ) into the recess ( ) and, if applicable, into a mold connected with the recess ( ) for forming a collar ( ) on a front wall surface ( ) in the stamping direction, and ablating the back wall surface ( ) and the protrusion ( ) by a fixed thickness amount ( ), which results in exposure of the recess ( ) and of the transparent plastic ( ).

Method for manufacturing housing or control-component parts of metal

An operational control for use with a ventilation, heating, or air conditioning unit of a vehicle, that can be actuated by a turn knob comprises: a guide member for being attached to and manipulated by a turn knob, the guide member defining a guiding groove; an adjusting lever for actuating a Bowden cable to which the adjusting lever is linked, the adjusting lever being mounted adjacent the guide member to pivot; a guide pin attached to the adjusting lever for extending into the guiding groove for cooperating with the guiding groove to cause the adjusting lever to pivot when the guide member is manipulated. The adjusting lever is made of a material that can be welded to steel and the guide pin is a weld-on steel ball welded to the adjusting lever.

Operational control

A push button switch (3) encounters, during a stroke of a push rod (6) thereof, a pressure point (D), a switching (contact-making) movement, and a return tension. A one-piece spring element (16) is provided for achieving this with an uncomplicated structure, with a short stroke, and with a reliable contact once the pressure point has been overcome. The one-piece spring element has, between a contact arm (26) and a return arm (21), hairpin-shaped bent guide legs (17, 18). A sloping step (24) formed on at least one of the guide legs creates the pressure point.

Push switch

An air outlet device is to grant in its closing position a tight closing e from whistling noises. This is to be achieved by simple means and despite component tolerances. For this purpose longitudinal gaps formed between a closure flap and seat edges before the closing process narrow towards that end of the closure flap which is remote from the actuating part. During the closing movement the closure flap is distorted elastically so that the longitudinal gaps close at first in the sections remote from the actuating part.

Air outlet device

An air outlet device including an air outlet channel having an open front and being located near an actuating part is provided with a plug base for a lamp behind the actuating part in a light-transmitting acceptance chamber. The lamp is to be replaceable from the front side without having to remove the actuating part toward the front. For this purpose the acceptance chamber is provided with a passage opening to the air outlet channel. The plug base is combined with a guide bead which, in the operating position, extends through the passage opening into the air outlet channel and ends at the front edge thereof as a handle. The plug base can be pulled through the air outlet channel and the passage opening out of the acceptance chamber and then be reintroduced into the latter.

In an electric manual switching device, a printed circuit board is to be protected from environmental influences. For this purpose, a foil continuously extending over the printed circuit board is provided in the switch housing between switching contacts and pushbuttons. The foil can be a flat component or a part shaped like a bag.

Electric manual switching device having environmentally protected

An illumination device for a front panel with illuminated areas, the latter eing illuminated by an incandescent lamp sitting in a connection base located behind the front panel through at least one light guide. The connection base is placed behind the front panel so that the incandescent lamp points away from the cover member. The lamp extends behind the front panel to the light guides. To make the incandescent lamp easily replaceable without loss of light, a cover member is removably attached to the illumination device such that removal of the cover member permits ready access to the incandescent lamp/connection base.

Illumination device for a front panel

A key assembly for receiving units employed in communications engineering, articularly for television receivers, comprises a plurality of mutually releasable depressible keys adapted to switch on storable, selectively adjustable electrical values supplied by channel memories consisting of a plurality of voltage dividers for capacitance diode tuning, further comprising, in association with the respective depressible keys, a plurality of depressible and rotatable knobs adapted to be rotated by means of a tool, said knobs being concealed behind a cover member slidably guided in a recess, said knobs being adapted to provide channel tuning and, if required, selection of the desired frequency range, said frequency range being adjustable by rotating the respective depressible and rotatable knob into any of a plurality of detented angular positions with the knob being in a position differing from the tuning position of the knob, and comprising a switch which is adapted to be actuated by means of a push rod which is capable of being operated through the medium of said cover member. Said switch actuating push rod (19) in addition constitutes said tool permitting said depressible and rotatable knobs (5) to be rotated.

Key assembly

A key assembly for receivers for communication systems, especially radio television receivers, comprises a casing, keys adapted for mutual release by means of a spring-loaded locking plate for switching in storable, selectively adjustable electrical values of channel memories consisting of a plurality of voltage dividers for variable capacitance diode tuning, rotary and slidable press buttons associated with the respective keys for channel tuning and optionally for selecting a frequency range, which is adjustable in a preferably pressed position of the rotary press button being different from the tuning position by turning into various locking angular positions, as well as a channel and frequency range indicator scale. According to the invention said indicator scale simultaneously is the locking plate for the keys.

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Bad Neustadt, Germany

Gerold Eckert