Preh Elektrofeinmechanische Werke Jakob Preh Nachf Gmbh & Co.

Precision Motors Deutsche Minebea Gmbh

Minebea Company, Limited

Preh-werke Gmbh Co. Kg

Precision Motors Deirtsche Minebea Gmbh

Jurgen Oelsch

Gerhard Hochgesang

Bertold Sturmer

Oswald Kuwert

Harald Rapp

Rudolf Limpert

Dieter Weber

Richard Volk

Karl-Heinz Claassen

Nicola Digiovinazzo

A rotor assembly for an electric motor having a rotor shaft and at least one permanent magnet arranged on the rotor shaft. The rotor shaft with the permanent magnet is accommodated in a sleeve the rotor shaft being freely rotatable within the sleeve. The sleeve is closed off by a flange at a first end face. An inner-rotor electric motor having a stator and a rotor assembly of the type described above, with the stator being inserted over the sleeve of the rotor assembly.

Rotor unit for an electromotor and an internal rotor electromotor

The present invention relates to a spindle motor with a magnetic seal. A method and an apparatus are described for sealing spindle motors, preferably those used for disk storage units.

Spindle motor with magnetic seal

The present invention concerns a sealing contacting system for the stator windings of spindle motors, which are provided for installation in the base plate of hard disk drives. The present invention has a peripheral, self-contained sealing surface free from interruptions, which avoids jumps or unevenness in the peripheral sealing region, eliminating previously unavoidable radial capillary gaps, so that hermetic sealing is produced between the region of the hard disks formed from clean space and the external ambient region.

Spindle motor for driving hard disk drives with sealing contacting system for the stator winding terminal

A data input device for an electronic data processing device such as a personal computer includes an input keyboard, which has a key field, a casing and a plug-in receptacle for a keyboard plug on a circuit connector; and a connector, such as a junction cable, which has a keyboard plug which fits into the receptacle on the keyboard, a circuit connector which is a connection wire, a plug at the end of the connection wire connecting with the electronic data processing device, and programmable encoder electronics for encoding unique signals corresponding to each key in the key field on the keyboard. A portion of the encoder electronics, in which the program relating the keyboard to the electronic data processing device is encoded, is located within the keyboard plug and not within the keyboard itself.

Programmable plug and cable for computer keyboards

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.

Keyboard switch device for facilitating removal and replacement of push

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.

Touch contact switch with arched switching film

A pushbutton switch device has a flat carrier having first and second swi contacts and a switch button arrangement for actuation of the first and second switch contacts. In order that the first and second switch contacts are switched in succession, the switch contacts to be actuated by a switch knob of the switch button arrangement are placed next to one another on the flat carrier. An insert having first and second switching surface parts corresponding to the first and second switch contacts respectively, is placed between the switch knob and the first and second switch contact. Upon initial actuation of the switch knob, the insert closes the first switch contact. Upon continued actuation of the switch knob, the insert will close the second switch contact.

Pushbutton switch device

A plurality of switching points are connected in groups to respective teral contact points via conductor strips on a keyboard printer circuit film. In order to achieve suppression of the coupling capacitances with simple means, decoupling resistor strips are printed between adjacent pairs of the conductor strips and are connected with the said conductor strips. The decoupling resistor strips consist of the same carbon resistor layer material as the terminal contact points.

Keyboard printed circuit film and method of fabrication

A flexible carrier film with a printed circuit thereon is provided in comation with a terminal device which provides a plurality of terminal connection pins. A first part of the printed circuit contains a plurality of conductors, and a second part contains a plurality of resistor strips for supplying voltage levels to each conductor. In order to connect the first and second parts without crossings, a grid of connection strips is provided between the conductor strips and resistor strips and connected thereto. The film is bent along a score line extending through the grid and at a right angle thereto, with the conductor strips and resistor strips located on the outside of the folded film. The film is then clamped to the terminal device at the score line so that each connection strip is clamped on both sides of the score line.

Device and method for connecting a printed circuit film

An improved key for typing keyboards or other terminal keyboards, which is ubstantially larger than the other keys and large compared with the contact to be actuated. In order to avoid tilting during out-of-center pressing, two shears are provided as a guiding means between the mobile and the immobile key parts. The shears are comprised of two frame parts pivoted about axes which are held aligned flush with each other. The shear arms provide four support points at their top free ends which enclose a rectangular surface which is practically congruent with the touch surface.

Keyboard key with means for supporting large key surface

A keyboard comprising a flexible-foil printed circuit in which an insulat foil or sheet substrate is provided with printed conductors and contact surfaces, in which the insulating foil sheet is provided with holes, and which includes a plurality of press buttons or keys associated with the contact surfaces, each key comprising an elastically deformable snap-action element which is adapted to be deformed upon actuation by means of an actuating button in order to bring the contact element into contact with the contact surface. The flexible-foil printed circuit comprises an insulating foil substrate having a thickness not exceeding 0.6 mm which is provided on both sides with printed conductors and on one side with electrical contact surfaces and/or contact elements. The conductors may be formed in separate printing steps for each side of the foil or sheet. Contacts extending through the holes in the substrate may be produced by means of the printing step itself during the printing of the conductors.

Keyboard

A process for the manufacture of a contact mat suitable for a keyboard or ypad is described. This contact mat is produced by the injection-moulding process and consists of a sheet-like composite body made of an electrically non-conductive two-component silicone rubber, and at least one carrier part, which is elastically deformable when pressure is applied to a key and is moulded out in the shape of a calotte. On the inside of the carrier part and in the pole region, there is a contact component which is made of an electrically highly conductive material. When the carrier part is depressed, an electrical connection is made via the contact component between the contact surfaces of a printed circuit located below the contact mat. In order to be able to manufacture the contact component in a simple manner and without waste, the contact component is made in an injection mould, wherein the entire lower mould part is at a temperature above the vulcanization temperature of the contact component. The upper cavity plate of the corresponding upper mould part consists of two halves of which one half is at a temperature below the vulcanization temperature. The contact component is produced by means of this half. Subsequently, a lower cavity plate of the lower mould part is rotated from this first into a second position, and the composite body and the carrier body are then moulded. This half of the upper cavity plate is at a temperature above the vulcanization temperature. Accordingly, all the curable components are vulcanized separately, even though they are moulded in the same mould.

Process for the manufacture of a contact mat

A keyboard comprises a base plate having conductor paths and contact areas rovided thereon, a plurality of keys associated with said contact areas, said keys consisting each of an elastically deformable snap member, the contact element thereof being adapted to be brought into contact with said contact areas by deformation upon actuation of an actuating button and being positioned above said contact areas in spaced relationship thereto. A metal frame is provided as mounting support for the snap members, said metal frame having a number, which corresponds to the number of snap members, of protrusions protruding therefrom in a direction toward the actuating buttons. Each protrusion has an opening therein, in which the snap member is held.

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Hohenroth, Germany

Jurgen Oelsch