Patents Represented by Attorney, Agent or Law Firm F. Brice Faller
-
Patent number: 4764832Abstract: Magnetic transducing head comprising a magnetic core having two core limbs (1, 3) formed from a ferrite, a non-magnetizable gap (11) extending between two core faces (1B, 3B) of the core limbs and an electric coil (7) passing through a winding aperture (5). A cladding consisting of a first layer (13) of an Ni-Fe-based alloy is provided on at least one of the core faces, and a second layer (15) of an Fe-Si-Al-based alloy which is provided on the first layer.Type: GrantFiled: May 21, 1987Date of Patent: August 16, 1988Assignee: U.S. Philips CorporationInventors: Ulrich E. Enz, Cornelis W. M. P. Sillen, Jacobus J. M. Ruigrok
-
Patent number: 4763035Abstract: A strip of electrically insulating foil (15) is subdivided into successive foil parts (23) separated by folding lines (21) and folded against each other along the folding lines. Each foil part has on one of its major surfaces a conductor track (25) which forms a curved meander-like line extending in a number of pole-forming curves (33) connected by connection members (31). The conductor tracks (25) on the foil parts (23) are connected together by connection tracks (27). The curves (33) cooperate with the connection tracks (27) and the connection members (31) to form coils arranged in a circle. The winding is particularly suitable as a stator winding for a flat direct current motor.Type: GrantFiled: November 10, 1987Date of Patent: August 9, 1988Assignee: U.S. Philips CorporationInventor: Leendert Zeeman
-
Patent number: 4760297Abstract: A small domestic appliance is driven by means of a single-phase synchronous motor (2) whose drive shaft (5) drives a load (9), the work function being independent of the direction of rotation of the motor and the operating noise and vibrations produced by the motor being dependent on the direction of rotation of the motor. In the transmisson system a unidirectional blocking device (41) forces the rotor to start in the optimum direction of rotation. In particular, the single-phase synchronous motor (2) including its transmission path to the load (9) is constructed that the optimum operating noise is obtained in that direction of rotation in which the torque exerted on the rotor (3) by the stator current becomes zero before the magnetic detent torque has become zero, when the stator coils (4d) are not energized. This has led to a stable rest position.Type: GrantFiled: March 31, 1987Date of Patent: July 26, 1988Assignee: U.S. Philips CorporationInventors: Hugo Schemmann, Peter E. Steiner
-
Patent number: 4757725Abstract: An apparatus for guiding the linear movement of one assembly relative to another assembly. One of the two assemblies has a pair of gear racks disposed parallel to the direction of movement. The other of the assemblies has at least two gear elements which mesh with the respective gear racks. The movement of the gear elements is synchronized in such a way that the gear elements each perform identical displacements along the associated gear rack. This prevents jamming of the assemblies during the linear movement. Several ways of synchronizing the gear elements are disclosed.Type: GrantFiled: July 11, 1986Date of Patent: July 19, 1988Assignee: U.S. Philips CorporationInventor: Michel P. Beugin
-
Patent number: 4758076Abstract: Optical axes of the day path and of the night path extend in a sagittal plane (5,9) of the carrying vehicle and the passage from the night path to the day path or conversely is effected by means for displacing a first reflector parallel to the plane in order that the input light beams are directed to the optical axis of the day path or of the night path. A second output reflector along the optical axis for the day path is simultaneously displaced from an active position, for viewing by day, to a concealed position, for viewing by night, when said first reflector is displaced to deflect said beams along said night path.Type: GrantFiled: February 18, 1986Date of Patent: July 19, 1988Assignee: U.S. Philips CorporationInventors: Fernand R. Loy, Jean-Luc Espie
-
Patent number: 4755709Abstract: An electric machine comprises a stator 7 and a rotor 17 mounted on a rotor shaft 15. In order to preclude axial vibrations of the rotor shaft the machine is provided with a first magnet 19a incorporated in a thrust block 19 and a second magnet 23 on the rotor shaft. The first and second magnetic means cooperate with each other to urge a bearing portion 15a of the rotor shaft against a bearing surface 19b of the thrust bearing with a predetermined pressure.Type: GrantFiled: July 11, 1986Date of Patent: July 5, 1988Assignee: U.S. Philips CorporationInventor: Machiel J. De Jager
-
Patent number: 4755982Abstract: A disc cassette includes a rotatable disc (1) contained in a disc-receiving space of an external enclosure (2), a front opening of the enclosure being closed by a closing member (7) which is latched in the enclosure by means of one or more resilient latching fingers (8) to retain the disc. The latching finger (8) pivots in a direction perpendicular to the plane of the disc (1) and cooperates with the side wall of a latching recess (12) formed in the inner side wall of the enclosure. A slot (15) formed in the main wall (3) of the enclosure (2) extends from the front opening of the enclosure into the latching recess but has a width which is smaller than the width at the latching recess and smaller than the width of the latching finger, and the end portion of the slot (15) which terminates in the front opening of the enclosure is covered by the portion (7A) of the closing member which projects from the enclosure.Type: GrantFiled: January 29, 1987Date of Patent: July 5, 1988Assignee: U.S. Philips CorporationInventor: Marcelles B. M. Douwes
-
Patent number: 4750826Abstract: Optical assembly comprising a holder (1) having an inner wall (9) on which a plurality of parallel ribs (11) are formed and an optical element (3) having an outer wall (7), a plurality of gaps (13) being formed between this outer wall and the ribs. The ribs are sufficiently narrow to present a substantially line-shaped contact area to the outer wall. The optical element is connected to the holder by means of an adhesive which is applied exclusively in said gaps.Type: GrantFiled: December 23, 1986Date of Patent: June 14, 1988Assignee: U.S. Philips CorporationInventor: Nicolaus Maan
-
Patent number: 4751592Abstract: A recording and/or reproducing apparatus (1) for a tape (12) in a cassette (2) includes a tape-guide device (24) for withdrawing the tape (12) from the cassette (2), wrapping the tape around a tape-guide drum (34) , and returning the tape into the cassette (2). The tape-guide device (24) includes a supporting ring (49) which is rotatable relative to the tape-guide drum (34), for carrying at least two tape guides (22,23), a first tape-guide (22) keeping the tape (12) wrapped around the tape-guide drum (34) and a second tape-guide (23) which in its operating position keeps the tape (12) away from the tape-guide drum (34).Type: GrantFiled: February 2, 1987Date of Patent: June 14, 1988Assignee: U.S. Philips CorporationInventors: Heinrich Hutter, Heinrich Maly
-
Patent number: 4750066Abstract: Magnetic head unit (1) in a plastic mounting (3) which encloses the magnetic head casing (30) behind the head face (4). The plastic mounting (3) has tape guide elements (7) which guide the magnetic tape moved along the head face (4) in the correct azimuth position. The connecting pins (26) projecting from the rear wall (25) of the head casing (30) are joined to a connecting plate (27), to which the connecting cables (32) are connected. A connecting bracket (28) serving for earthing is provided on the magnetic head casing (30) and is connected to the connecting plate (27) substantially parallel with the connecting pins (26) of the magnetic head casing (30).Type: GrantFiled: May 16, 1986Date of Patent: June 7, 1988Assignee: U.S. Philips CorporationInventor: Norbert Kunze
-
Patent number: 4749370Abstract: A cable clamp for an electrical connector in which first and second clamping walls are moved into overlapping relation to deform transversely and trap between them a portion of the cable to be terminated. Cam means urge overlapping portions of the walls together into gripping engagement with the trapped cable portion and cable gripping means insure that cable is only drawn from one direction during clamping to avoid straining the termination.Type: GrantFiled: September 2, 1982Date of Patent: June 7, 1988Assignee: AMP IncorporatedInventors: Jessie L. Moser, Richard L. Hughes
-
Patent number: 4745505Abstract: The magnetic head according to the invention has a magnetic core (1, 2) with pole tips (3, 4) which limit a gap (5) which is filled with a synthetic resin chosen from the group comprising epoxy resins, acrylic ester resins and polyester resins as a non-magnetizable material which adheres the pole tips to each other. The gap has a length of at most 0.5 .mu.m. A modifier may be used at the interfaces between the synthetic resin and the pole tips (3, 4) to further increase the tensile strength. The magnetic head is manufactured by applying to a moulding (1) of magnetizable material a solution of synthetic resin, by rotating the moulding about an axis at right angles to the coated surface and by placing a second moulding of magnetizable material (2) against it and curing the synthetic resin under pressure at an elevated temperature.Type: GrantFiled: June 28, 1984Date of Patent: May 17, 1988Assignee: U.S. Philips CorporationInventors: Winfried L. Peeters, Johannes J. Ponjee
-
Patent number: 4745363Abstract: A non-oriented direct coupled sensor for gear teeth or similarly shaped discontinuities of a ferrous magnetic or magnetic target uses a single magnet and a direct coupled Hall cell integrated circuit to detect the presence or absence of gear teeth. The sensor incorporates techniques for flux steering and flux reversals independent of the orientation of the sensor to the target to overcome the operate or release point of a Hall switch, latch or other device. The use of spaced apart, offset flux concentrators provides a sensitive device with favorable tolerances in temperature and air gap.Type: GrantFiled: November 25, 1986Date of Patent: May 17, 1988Assignee: North American Philips CorporationInventors: Ronald E. Carr, Matthew L. Schneider, Paul E. Payne
-
Patent number: 4741095Abstract: A method of manufacturing magnetic head cores is provided in which a plurality of separate magnetic head cores is cut from a one-piece ferrite core block. A winding aperture is provided in each magnetic head core. A fracture in the cross-section of the material of the head core is generated by the winding aperture and the future tape contact face during or after the winding aperture is provided. A non-magnetic material in a liquid form is provided between the fracture faces and is converted to the solid form.Type: GrantFiled: April 23, 1986Date of Patent: May 3, 1988Assignee: U.S. Philips CorporationInventor: Johannes P. M. Verbunt
-
Patent number: 4739548Abstract: A plurality of magnetic head cores is cut from a preprocessed ferrite core block having a gap formed by means of a fracture method. To this end the core block is notched on a line along which the gap is to be formed. subsequently the core block is subjected to a load (tensile stress) until it breaks on the line. A non-magnetic material in a liquid form is provided between the fracture faces which are kept at a desired distance from each other until the material has cured. In a preferred method the core block consists of a first sub-block having a series of yokes and a second sub-block bonded thereto to define the winding apertures. This permits use of a high grade ferrite only at the gap, and further permits winding the limbs of the yoke prior to bonding.Type: GrantFiled: April 23, 1986Date of Patent: April 26, 1988Assignee: U.S. Philips CorporationInventors: Budiman Sastra, Jan H. J. Mengelers
-
Patent number: 4740081Abstract: An optical sensor (1) is connected to an electro-optical transducer unit (35) and a measuring circuit (36) via an optical delay line (14) and an optical path (15). Error-free measurement values which are independent of the attenuation characteristics of the optical delay line (14) are obtained if the optical sensor (1) comprises a polarization splitter (3) which receives light pulses from the optical path (15) and from the optical delay line (14) and which is followed by a sensor body (2) which is traversed by the light pulses. A mirror (4) arranged on the side of the sensor body (2) on which the light is not incident reflects the light pulses back into the polarization splitter (3), which couples the light pulses back into the optical path (15) and the optical delay line (14).Type: GrantFiled: March 18, 1986Date of Patent: April 26, 1988Assignee: U.S. Philips CorporationInventors: Gerhard Martens, Thomas Helzel
-
Patent number: 4738637Abstract: Shroud assembly for mounting to a panel opening includes a ground plane spring manufactured in continuous strip form. Individual spring strips are severed from the continuous strip and sandwiched between sidewalls of the shroud and a rim member. First spring fingers extend into the cavity which receives the connector and second spring fingers extend through apertures in the rim member to bear against the panel. Pegs on the sidewalls cooperate with holes in the strips and the rim member.Type: GrantFiled: October 11, 1985Date of Patent: April 19, 1988Assignee: AMP IncorporatedInventors: John C. Asick, John M. Landis, Clair W. Snyder, Jr., Leon T. Ritchie
-
Patent number: 4737215Abstract: A predetermined number of optical fibre parts (27) is provided on a rectangular frame (1), the fibre parts extending parallel to each other along a straight line between two opposite first sides (3) of the frame. These first sides (3) comprise comb-shaped fibre guides (5) with teeth (13), between which the fibre parts (27) are guided so that the fibre guides determine a first relative distance between the fibre parts. The first sides (3) are pivotably connected to the two second sides (7) of the frame (1), which is then deformed to a parallelogram until the portions of the fibre parts (27) located inside the frame have a predetermined second relative distance. A permanent connection between the fibre parts (27) is established so that a ribbon of fibre parts is obtained. A number of such ribbons can be stacked with the interposition of strip-shaped spacers (29) to form a bundle.Type: GrantFiled: April 3, 1986Date of Patent: April 12, 1988Assignee: U.S. Philips CorporationInventors: Jacobus Stoffels, Adrianus P. Severijns
-
Patent number: 4734811Abstract: Magnetic transducing head, comprising a core of magnetizable material having two slightly spaced limbs defining a transducing gap between them, a bundle of insulated wires of electrically conducting material running parallel to the transducing gap being bonded both to the inside and to the outside of at least one core limb, the ends of the wires of different bundles located on the same side of the core limb being connected together by means of connection wires in such a manner that a plurality of electrical turns is formed.Type: GrantFiled: April 7, 1986Date of Patent: March 29, 1988Assignee: U.S. Philips Corp.Inventors: Jakob G. Siekman, Johann R. P. N. Cruts
-
Patent number: 4734613Abstract: An efficiently cooled display tube is obtained by pumping a low viscosity liquid having a high heat capacity through a cooling space less than 1 mm. thick on the outside of the display window. A chamber is smoothly connected to the inlet aperture of the cooling space to assure a laminar flow, eliminating swirls which could give rise to refractive patterns in the display picture.Type: GrantFiled: January 9, 1984Date of Patent: March 29, 1988Assignee: U.S. Philips CorporationInventors: Gerritt B. Gerritsen, Willem M. Van Alphen