Abstract: A tire inflation system and wheel speed sensor system having a hollow shaft rotatable with a drive mechanism. The shaft extends into the hollow end of an axle. A angular velocity system rotates with the shaft within the hollow end of the axle. A sensor, mounted within the axle, senses the rotation of the angular velocity system. The hollow shaft is a conduit for air from an air source to at least one tire.

Abstract: A single-point magnetic contact latch assembly for "parking" a read/write head of a memory storage device over a data-free landing zone during off-power conditions has one or more permanent magnets, a core having a curvilinear shape on one end and an annular flange formed on the opposing end, and a casing, having an open end and a partially closed end, covering the magnet(s). The core is disposed adjacent the magnet(s) and lies within the flux paths thereof. The casing covers the core and magnet(s) so that the curvilinear end of the core extends through the partially open end of the casing. The casing abuts an outer periphery surface of the flange with a press-fit so that the casing is outwardly radially deformed at the point of abutment securely anchoring the casing, and magnet(s) in position relative to the core.

Abstract: A single-point magnetic contact latch assembly for "parking" a read/write head of a memory storage device over a data-free landing zone during off-power conditions has one or more permanent magnets, a core having a curvilinear shape on one end and an annular flange formed on the opposing end, and a casing, having an open end and a partially closed end, covering the magnet(s). The core is disposed adjacent the magnet(s) and lies within the flux paths thereof. The casing covers the core and magnet(s) so that the curvilinear end of the core extends through the partially open end of the casing. The casing abuts an outer periphery surface of the flange with a press-fit so that the casing is outwardly radially deformed at the point of abutment securely anchoring the casing, and magnet(s) in position relative to the core.

Abstract: A single-point magnetic contact latch assembly for "parking" a read/write head of a memory storage device over a data-free landing zone during off-power conditions has one or more permanent magnets, a core having a curvilinear shape on one end and an annular flange formed on the opposing end, and a casing, having an open end and a partially closed end, covering the magnet(s). The core is disposed adjacent the magnet(s) and lies within the flux paths thereof. The casing covers the core and magnet(s) so that the curvilinear end of the core extends through the partially open end of the casing. The casing abuts an outer periphery surface of the flange with a press-fit so that the casing is outwardly radially deformed at the point of abutment securely anchoring the casing, and magnet(s) in position relative to the core.

Abstract: A magnet device having a predetermined field profile has an elongated permanent magnet, having a longitudinal axis and a peripheral surface, magnetized diametrically with the direction of magnetization extending transversely to the longitudinal axis and rotating about at least a portion of the length of the longitudinal axis of the magnet. The rate of rotation is selected to provide a predetermined magnetic field profile as presented to a Hall effect device positioned a fixed distance from the peripheral surface of the magnet when relative movement between the Hall effect device and the permanent magnet occurs. The magnet is formed of a composite material which includes a magnetically isotropic permanent magnet powder adhered together by an adhesive non-magnetic binder.

Abstract: A magnet roll for an electrophotographic device includes a magnet carrier assembly constituted by a plurality of identical cylindrical segments of injection molded plastic material. The segments are coaxially arranged and longitudinally aligned in an end-to-end relationahip on a spindlelike metal rod constituting the magnet roll axis of rotation. The segmented carrier assembly provides a plurality of longitudinally extending channels circumferentially spaced about the carrier assembly. The bottom of each channel has along its length a central groove that functions as a locator for an extruded, flexible magnet strip that mounts within the channel, each magnet strip having along the length of its underside a centered tongue that fits into the locator groove of its respective channel. Such a magnet roll provides for highly accurate positioning of the outer working surfaces of the magnet strips.

Abstract: Fluid flow indicator is provided in which a fluid pressure to position transducer moves a permanent magnet from a no-flow position to a flow position in response to fluid pressure. The change in the position in the permanent magnet changes the intensity and polarity of the magnetic field that the permanent magnet places upon a Hall effect semiconductor; so that a switching function results as a function of fluid pressure differential causing no-flow and flow conditions. The change in magnitude and polarity of the magnetic field between first and second distances from one surface of the permanent magnet is increased by providing an opening through the permanent magnet and by providing a magnetic device near the opposite surface of the magnet.

Abstract: A potentiometric linear position sensor including a housing (10) made of extruded aluminum which may be cut to preferred lengths (15). The sensor includes a Kapton film substrate (32) having first a uniform coating of resistive material (34) disposed thereon, and then distinct islands formed by laser sculpting. Conductive material (50, 53, 55, 56, 57, 58), screen printed upon the resistive material before or after the laser sculpting, is connected to terminals (62, 68, 70) for the respective electrical elements (48, 51, 55). The flexible Kapton film substrate (32) is inserted endwise into the housing (10) with the side edges of the substrate curled upwardly and captured within longitudinal housing slots (28, 29) disposed along opposite housing walls (14, 16).

Abstract: Magnetic switch apparatus which includes a casing having a magnetically sensitive component securely positioned therein in a predetermined location. The component may be in the form of either a conventional reed switch or Hall effect sensor and is provided with electrical terminal leads extending therefrom. The casing includes means for locating and securing the leads against movement upon application of a tensile force thereto, such means being in the form of suitable embossments in the casing about which the leads are partially wrapped. The casing further is provided with means for mounting the same on a supporting member, such as a circuit board, in a predetermined position such that the magnetic component will also be correspondingly positioned relative to the supporting member.

Abstract: A rotational speed sensor (10) comprising a shaft (54) having a reluctor (50) mounted thereon and coacting with a complementary shaped stator (18). The reluctor (50) and stator (18) have coacting regularly spaced projections (20, 58) which are magnetizable so that as the reluctor (50) rotates with the shaft (54), there is developed a cumulative voltage output which in turn enables utilization of much greater air gaps between the respective projections (20, 58). Because of the greater latitude in the air gaps, it is possible to construct a variable reluctance speed sensor (10) much more economically and with less emphasis on cumulative manufacturing tolerances. This greater flexibility of manufacturing with higher manufacturing tolerances contributes materially to the attainment of an economical and reliable speed sensor.

Abstract: A leak tight position sensor or transducer (10) comprising a housing (12) having a cavity (32) with an opening (14) in one side and an aperture (16, 26) in each end of the housing (12). Located within the cavity (32) is a drive block (34) having bushing (36) with a threaded aperture (37) receiving the threaded end (42) of a shaft (40) made of a permanent magnet material. The threaded end (42) of the magnetic shaft (40) has a flat (44) and the other end (46) of the shaft is journalled in an aperture (16) of the housing (12). A metallic contactor (38) attached to the drive block (34) wipably engages an electrical circuit (54) printed on the interior surface (52) of a ceramic substrate (50) proportioned to seal the housing opening (14). Electrical wires (60) inserted through openings (58) in the substrate (50) are soldered to the circuit (54) and not only complete electrical connection and securement of the wires (60) to the circuit (54), but seal the openings (58) in the ceramic substrate (50).

Abstract: A potentiometric linear position sensor including a housing (10) made of extruded aluminum which may be cut to preferred lengths (15). The sensor includes a Kapton film substrate (32) having first a uniform coating of resistive material (34) disposed thereon, and then distinct islands formed by laser sculpting. Conductive material (50, 53, 55, 56, 57, 58), screen printed upon the resistive material before or after the laser sculpting, is connected to terminal means (62, 68, 70) for the respective electrical elements (48, 51, 55). The flexible Kapton film substrate (32) is inserted endwise into the housing (10) with the side edges of the substrate curled upwardly and captured within longitudinal housing slots (28, 29) disposed along opposite housing walls (14, 16).

Abstract: An electrodynamic acoustic transducer (54) having two voice coils (50, 52), the coils being addressed by amplified digital signals. The system (12, 60, 54) utilizes a preamplified analog input signal (10) which is supplied to a bifurcated network, one such signal being processed by an inverter (18). The analog signals (42, 44) are compared with triangular waves (38, 40) to effect switched signals (46, 48) that are pulse width modulated signals. The signals (46, 48) are then amplified through impedances (76, 78) and high speed, high current semiconductor switch means (80, 82) so that the amplified digital signals serve as driver means communicated to the separately addressable coilds (50, 52). There is a dynamic balance achieved by separate energization of the coils (50, 52) whereby the diaphragm (97) is positively located in both axial driving directions and is disposed in equilibrium positions by the energization and balancing of the respective coils (50, 52).

Abstract: A multi-stage latching device for a carburetor which controls the idle speed by defining various throttle plate positions according to deceleration sensor switch, air conditioning switch and ignition switch states. The mechanism which moves the throttle plate consists of a primary force coil which energizes an armature against spring return and the position of the armature coupled through a shaft establishes the idle speed. The throttle position is determined by any one of three adjustably disposed latch coils which when energized, magnetically couple to a casing to define a stop. A circuit control associated with each latch deenergizes the primary force coil while maintaining the magnetic coupling of the stop. With primary force off, the return spring forces the armature back against the energized stop and hence establishes the throttle position and idle speed.