Patents Assigned to Preh, Elektrofeinmechanische Werke, Jakob Preh Nachf GmbH & Co.
  • Patent number: 4997998
    Abstract: A key cap of a keyboard is guided at a frame 2, covers a switching element and a luminous element 5 and is provided with an operation section for the switching element 4 and with a transparent symbol zone 18 before the luminous element 5. The key cap consists of a flexible, transparent flat foil 8 fixed with a marginal section 9 at a frame 2. As operation section a body 15 is injection-moulded to the foil 8 at a distance from the marginal section 9. The foil 8 forms a joint section 21 between the marginal section 9 and the body 15, the printed symbol zone 18 being provided for between the body 15 and the joint section 21.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: March 5, 1991
    Assignee: Preh, Elektrofeinmechanische Werke Jakob Preh, Nachf. GmbH & Co.
    Inventor: Karl-Heinz Bauer
  • Patent number: 4985002
    Abstract: To simplify the assembly of a shielded circular plug connector (3), it is oposed to provide the shield sleeve (10) of the plug connector (3) with radially raised embossings (12) and the support part containing the pin-type or socket-type plug contacts (2) with spring elements. When joined together, these two parts interlock automatically.
    Type: Grant
    Filed: October 25, 1988
    Date of Patent: January 15, 1991
    Assignee: Preh, Elektrofeinmechanische Werke Jakob Preh, Nachf, GmbH & Co.
    Inventors: Gunter Maisch, Alfons Haag, Ken Wood
  • Patent number: 4902862
    Abstract: Push button device having a parallel guide member between a button head and guide. A catch device holds the parallel guide member in a lock-in position so that the button head supporting the parallel guide member can be fitted easily to the guide. In the lock-in position, stop members of the parallel guide member are located in front of engraving slots. By pressing the button head, the parallel guide member is moved from the log-in position into the operating position. The stop members move into the engaging slots.
    Type: Grant
    Filed: May 12, 1988
    Date of Patent: February 20, 1990
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf GmbH & Co.
    Inventors: Jurgen Oelsch, Bertold Sturmer, Nicola Digiovinazzo, Gerhard Hochgesang
  • Patent number: 4903002
    Abstract: In the case of a displacement or position transducer, it is provided that a onductor foil (5) is arranged over the resistor track (4), held at a distance from it and able to be pressed with flexible resilience against the resistor track, and that the slide (8) is displaceably arranged above the conductor foil (5), pressing the latter against the resistor track (4), the conductor foil preferably being electrically connected to a conductor track (2) running parallel to the resistor track (4), at a distance from it and electrically separated from it.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: February 20, 1990
    Assignee: Preh, Elektrofeinmechanische Werke, Jakob Preh. Nachf. GmbH & Co.
    Inventor: Lothar Sachsse
  • Patent number: 4840114
    Abstract: 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.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: June 20, 1989
    Assignee: Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. GmbH & Co.
    Inventors: Karl-Heinz Bauer, Gerold Eckert
  • Patent number: 4823238
    Abstract: 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.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: April 18, 1989
    Assignee: Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. GmbH & Co.
    Inventors: Karl-Heinz Bauer, Gerold Eckert
  • Patent number: 4821413
    Abstract: In an electric component a plastic sheath encloses conductive connections d leaves their terminal ends exposed. In order to keep the conductive connections at specific distances to the plastic sheath and to guarantee that the conductive connections are not exposed at the plastic sheath in intermediate areas, the conductive connections are secured together in spaced relation by a plastic carrier surrounding the conductive connections at spaced regions along their length. The plastic carrier has pins projecting therefrom which have end surfaces which serve to space the conductive connections a true distance from the surface of a mould in which a plastic sheath is moulded around the conductive connections and the plastic carrier. The plastic carrier and the conductive connections are encapsulated with the plastic sheath with the pins properly positioning the conductive carriers within the plastic sheath without forming any undesired openings in the plastic sheath.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: April 18, 1989
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
    Inventors: Herbert Schmitt, Dietrich Krause, Helmut Winkler
  • Patent number: 4816801
    Abstract: It should be possible to adjust without difficulty the moment of friction curring during rotation on a variable resistor. A bolt (11) is provided for this purpose for holding a rotating part (13) axially in position with a base component (2). A tap (24) is brought into contact with a resistance track (5) rotating in the base component (2) in a radial direction to the axis of rotation (14). The bolt (11) can at the same time be used for securing the variable resistor (1) and as the electrical connection for the tap (24).
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: March 28, 1989
    Assignee: Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. GmbH & Co.
    Inventor: Gerhard Spiller
  • Patent number: 4803323
    Abstract: 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.
    Type: Grant
    Filed: January 30, 1987
    Date of Patent: February 7, 1989
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
    Inventors: Karl-Heinz Bauer, Gerold Eckert
  • Patent number: 4800466
    Abstract: 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.
    Type: Grant
    Filed: May 3, 1988
    Date of Patent: January 24, 1989
    Assignee: Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. GmbH & Co.
    Inventors: Karl-Heinz Bauer, Gerold Eckert, Rudiger Maidhof
  • Patent number: 4790199
    Abstract: In a control device, especially for heating and ventilation systems in mo vehicles, comprising a rotatable control knob and a linearly movable setting member, a lever is provided for coupling the knob and member and converting rotational motion of the knob into linear movement of the setting member. To achieve this, the control knob 2 is provided with a guide slope extending at an acute angle to the axis of rotation. A shorter arm portion of the lever is controlled by the guide slope. A longer arm portion of the lever is actuated by movement of the shorter arm portion against the guide slope and acts upon a coupled setting member in a linear manner.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: December 13, 1988
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
    Inventors: Karl-Heinz Bauer, Viktor Geiss
  • Patent number: 4773780
    Abstract: A keyboard with a metal carrier plate and a guide frame for keys to be athed thereto. The guide frame has a base part which is provided with legs. The legs of the guide frame are inserted into openings in the carrier plate. To secure the guide frame to the carrier plate, each opening has a recess starting at the lower edge of the carrier plate and which terminates at a bracket which is formed as part of the carrier plate. The legs are provided with foot parts which slide into the recess located beneath the respective bracket, causing a peg to snap into another opening in the carrier plate. In such a manner, the guide frame is secured to the carrier plate.
    Type: Grant
    Filed: October 24, 1986
    Date of Patent: September 27, 1988
    Assignee: Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. GmbH & Co.
    Inventor: Gerhard Hochgesang
  • Patent number: 4771262
    Abstract: A drive means of a rotary potentiometer is arranged to work trouble-free in the case of misalignment between the rotary axis of the rotating body and the rotary axis of the driving member. Teeth are arranged in the rotating, or rotary body, the crests of which teeth are directed to the rotary axis. The driving member is adjacent to the one flank of the one tooth and the one flank of the other tooth. The flanks of the teeth are involutely rounded off, so that the applied torque remains substantially constant in event of any misalignment of the driving member axis with respect to the body axis.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: September 13, 1988
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
    Inventor: Oswald Reuss
  • Patent number: 4763101
    Abstract: A locking slide switch is adapted to set a resistor depending on the length f travel. A key body has a row of teeth with which a pinion meshes. A locking push-button is provided on the shaft of the pinion. In order to make locking from both sides possible, a second pinion or an elongated pinion is guided in the row of teeth. On this pinion is provided a second push-button, which can also be blocked. An on-off switch is additionally provided.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: August 9, 1988
    Assignee: Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. GmbH & Co.
    Inventors: Karl-Heinz Bauer, Gerhard Spiller
  • Patent number: 4758185
    Abstract: A multipoint connector provides a contact support element for holding cont blades staggeredly arranged in two rows of chambers. To simplify the structure of the multipoint connector, the contact support element comprises a first and a second support element being integrally formed with respective housing half-shells which are pivotally connected so that they can be opened, or closed upon each other. The separating surface between the two support elements is arranged such that all chambers are located in the first support element. The contact blades may be inserted into the chambers from the separating surface when the support elements are open. The second support element closes the chambers when it is closed upon the first support element.
    Type: Grant
    Filed: December 11, 1985
    Date of Patent: July 19, 1988
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
    Inventor: Oswald Reuss
  • Patent number: 4757164
    Abstract: A pushbutton switch comprising a housing within which a pushbutton can move ith respect to a housing socket is described. Within the housing is placed a switch plunger which moves longitudinally and can also pivot through a small angle. A contact bridge, which can be pivoted in an oversprung fashion between two fixed contacts, is disposed in the housing. The placement of the contact bridge is governed by a switch rocker, which is arranged in a hinged fashion in the housing. This allows the switch plunger and switch rocker to engage. The counterbearing for the contact bridge consists of a knife-edge bearing in the switch rocker. Between the switch plunger and the switch rocker is a return spring, arranged so that in the rest position of the pushbutton, the switch plunger occupies a pivoted position remote from the middle position. The cross motion of the switch plunger is halted, depending on the direction of motion of the pushbutton, by a constraining guide on each side.
    Type: Grant
    Filed: April 24, 1987
    Date of Patent: July 12, 1988
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
    Inventors: Karl-Heinz Bauer, Edgar Maisch
  • Patent number: 4743722
    Abstract: A switch designed to be activated by touch contact has a switching chamber ith contact surfaces on opposite sides thereof. A flexible switching film carries one of the contact surfaces and is arched over one side of the chamber. In order to prevent an increase in length of the switching film due to climatic effects from leading to incorrect switching, the switching film has at least one punctiform or linear deformation placed so as to cause the film to arch away from the opposite side of the chamber.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: May 10, 1988
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
    Inventor: Jurgen Oelsch
  • Patent number: 4734918
    Abstract: A luminous band display device is shown for the thermometer scale-like diay of the position of a control, e.g., of a turning knob or slide, having a series of luminous segments arranged in a circular or straight pattern. The luminous segments are formed by the ends of light guides which are led out from a generally cylindrical luminous center in a star-shaped or similar pattern. The luminous center consists of a cylindrical socket receiving a light source, and a cover which carries at least one color band and which can be rotated relative to the socket by means of the control is located between the light source and the beginning of the light guide. The light guides are arranged over approximately three fourths of the circumference of the luminous center. In order for all luminous segments of the entire display scale to light in only one color even in the stop positions of the control, an outlet opening and a guide for the color bands projecting from the socket are provided.
    Type: Grant
    Filed: May 17, 1984
    Date of Patent: March 29, 1988
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
    Inventors: Karl-Heinz Bauer, Reinhold Wolf
  • Patent number: 4722765
    Abstract: The present invention describes an improved reverse lamination process for reparing printed circuits with resistors, conductor strips and/or contacts integrated in the circuit. A separating layer is applied on a metallic intermediate carrier. The intermediate carrier thus coated is then printed with a conductive paste in a desired. mirror-inverted layout to provide the resistors, conductor strips and/or contacts. This is followed by the lamination which is carried out under temperature effect and under pressure, the thus laminated package comprising the intermediate carrier, an intermediate layer and the final substrate. The intermediate carrier is subsequently removed, and the separating layer is etched off. The separating layer acts as a parting agent to permit easy mechanical separation and reuse of the metallic intermediate carrier.
    Type: Grant
    Filed: December 23, 1986
    Date of Patent: February 2, 1988
    Assignee: Preh Elektrofeinmechanische Werke Jakob Preh Nachf. GMBH & Co.
    Inventors: Peter Ambros, Walter Budig, Gisela Westermeir
  • Patent number: 4702708
    Abstract: The invention pertains to a plastic plug-type connector module which carr a printed circuit board made of ceramic. A plurality of plug members each have a rear projecting end soldered to a contact member made from a spring material, and have another portion embedded by injection molding in an insulating carrier body. The contact members in turn make contact with edge contact surfaces of the printed circuit board. In order to simplify the manufacture and to achieve soldering guaranteeing reliable contact, part of a perforated band from which the contact member is cut off is left in place. This part is also used to solder the contact member to the plug member. In order to align the surface of the printed circuit board as exactly as possible parallel to a first, flat surface of the module, there are provided molded locally limited elevations with different heights on a second flat surface which carries the printed circuit board.
    Type: Grant
    Filed: July 18, 1985
    Date of Patent: October 27, 1987
    Assignee: Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf, GmbH & Co.
    Inventors: Oswald Reuss, Karl L. Otto