Abstract: A voice coil actuator includes a magnetic flux conductive material core, a magnet and an electrical current conductive coil. The core has a first surface and a continuous channel disposed in the first surface. The channel has a pair of opposing walls. The magnet is disposed in intimate contact with a first one of the walls and spaced from a second one of the walls so that a gap remains between the magnet and the second one of the walls. The magnet has a first face of a first magnetic polarity facing the first one of the walls and a second face of a second, opposite magnetic polarity facing the gap. The magnet is further spaced from a bottom of the channel so that magnetic flux is substantially normal from the second face across the gap to the second one of the walls.

Abstract: An improved electromagnetic actuator includes a first assembly, a second assembly disposed for relative movement with respect to the first assembly and at least a first flexure interconnecting the first assembly and the second assembly. The first assembly includes a core having a first magnetic pole of a first polarity in a second magnetic pole of a second polarity. The second assembly includes an electrical current conductive coil having a first coil portion and a second coil portion. The first magnetic pole is in a facing relationship to the first coil portion and the second magnetic pole is in a facing relationship to the second coil portion. The first coil portion and the second coil portion are arranged so that an electrical current in the coil develops additive flux current cross products at each of the first coil portion and the second coil portion. One of the first assembly and the second assembly includes a magnetic flux return path between the first coil portion and the second coil portion.

Abstract: An active and passive loudspeaker voice coil excursion and amplitude gain control device is disclosed. The excursion and amplitude gain control device is utilized in connection with a voice coil actuator having a case, a coil and a coil carrier having an extreme downward position contacting the case. The excursion and amplitude gain control device includes a restraining member mounted to the coil carrier, wherein the restraining member is positioned on the carrier such that during downward movement of the coil carrier, the restraining member contacts the case before the coil carrier reaches the extreme downward position. A proximity sensor is mounted to the coil carrier, wherein the proximity sensor produces a proximity signal varying proportional to the distance of the sensor from the extreme downward position.

Abstract: A compressor is disclosed having an electromagnetic actuator for driving the piston in the compression cylinder. The actuator includes an electromagnetic element having a core and a coil. The core has an electromagnet surface and a channel extending through the core. The coil is disposed in the channel. An axially reciprocating armature element is interconnected with the piston. The armature element defines an axial stroke having a stroke midpoint and a stroke peak. The armature element also has an armature surface dimensioned to align with and correspond to the electromagnet surface at the stroke peak. The actuator also includes a primary spring disposed on one end of the armature element for biasing the armature from movement in an axial direction. A secondary spring is disposed on the opposing end of the armature element and biases the armature from movement in an opposite axial direction. The armature is biased by the springs to resonate at a pre-determined frequency.

Abstract: A compressor having an electromagnetically actuated valve is disclosed. The movement of the compressor's piston is controlled by an electromagnetically actuated valve. The valve includes an electromagnetic element having a core and a coil, and an armature. The core has a surface and an opening at the surface extending through the core. The surface also includes a continuous channel extending around the opening. The channel has a top portion of frustroconical cross-section and a bottom portion. The coil is disposed in the bottom portion. The armature element has a raised portion dimensioned to be received within the top portion of the channel. The valve shaft is disposed within the opening of the electromagnetic element and is connected to the armature. The compressor piston is connected to one end of the shaft. A support spring is disposed within the opening of the electromagnetic element, and extends from the retaining bar to the upper surface of the cylinder.

Abstract: A compressor having an electromagnetically actuated valve is disclosed. The movement of the compressor's piston is controlled by an electromagnetically actuated valve. The valve includes an electromagnetic element having a core and a coil, and an armature. The core has a surface and an opening at the surface extending through the core. The surface also includes a continuous channel extending around the opening. The channel has a top portion of frustroconical cross-section and a bottom portion. The coil is disposed in the bottom portion. The armature element has a raised portion dimensioned to be received within the top portion of the channel. The valve shaft is disposed within the opening of the electromagnetic element and is connected to the armature. The compressor piston is connected to one end of the shaft. A support spring is disposed within the opening of the electromagnetic element, and extends from the retaining bar to the upper surface of the cylinder.

Abstract: An improved electromagnetically actuated valve is disclosed. The improved valve design includes a layer of structurally stable, non-magnetic material, preferably Kapton or Chrome, disposed intermediate the core element and the electromagnetic element of the valve, and a core element and electromagnetic element fabricated from a high electrical resistive iron material. The layer of non-magnetic structurally stable material and high resistance core element serve to eliminate the hysteresis effect in the magnetic force of the valve. The core element may also include radially extending or axially extending perforations through the core element. The axial and radial perforations serve to reduce the weight of the core design and the axial perforations serve to reduce the effect of the air spring created in the gap as the core element approaches the electromagnetic element during operation of the valve.

Abstract: An electromagnetic actuator includes a magnetic flux conductive material housing, an electrical current conductive coil, a magnetic flux conductive material stationary core portion, a slideable core portion, and a pair of radially polarized magnetic flux developing elements. The coil is disposed in the housing coextensively adjacent to the housing's interior wall. The core is disposed within the housing and the coil and includes both the magnetic flux conductive stationary core portion and the slideable core portion. The slideable core portion is slideably received on the stationary core portion, and the magnetic flux developing elements are carried on the exterior wall of the slideable core portion in a facing relationship with the coil.

Abstract: The magnetic material disclosed in a preferred embodiment of the invention contains the following relative proportion of components, at. %:______________________________________ at least one of the rare earth elements selected 12.0-17.0; from the group consisting of Neodymium and Praseodymium at least one of the rare earth elements selected 0.1-5.0 from the group consisting of Dysprosium and Terbium at least one of the elements selected from the 0.5-4.0; group consisting of Aluminum, Niobium, and Chrome at least one of the elements selected from the group 0.1-1.5; consisting of Titanium, Hafnium, Zirconium, Vanadium and Titanium Cobalt 2.0-6.0 Boron 6.5-8.5 Uranium 0.05-1.

Abstract: A linear electromagnetic actuator has it core mounted to a can body forming apparatus and its coil attached to re-draw sleeve of such apparatus. The actuator provides for the axial movement of the re-draw sleeve between its fully retracted position and its fully extended position. The re-draw sleeve and the coil are coaxially mounted to each other so that the force exerted on the re-draw sleeve is also coaxial. Once the re-draw sleeve is in its fully extended position, an electromagnet is turned on so that the re-draw sleeve exerts the requisite force on the can material preform. The electromagnet is mounted coaxially about the re-draw sleeve and exerts its force on a magnetic material ring mounted to the re-draw sleeve to hold the re-draw sleeve against the can material preform.

Abstract: A voice coil actuator includes a magnetic flux conductive material core, a magnet and an electrical current conductive coil. The core has a first surface and a continuous channel disposed in said first surface. The channel has a pair of opposing walls. The magnet is disposed in intimate contact with a first one of said walls and spaced from a second one of said walls so that a gap remains between the magnet and the second one of the walls. The magnet has a first face of a first magnetic polarity facing the first one of the walls and a second face of a second, opposite magnetic polarity facing the gap. The magnet is further spaced from a bottom of the channel so that magnetic flux is substantially normal from the second face across said gap to the second one of the walls.

Abstract: An electromagnetic actuator is disclosed having a case fabricated of a ferromagnetic material and defining a central axis, a core disposed coaxial with the central axis, and being in slideable engagement within the case. The core includes a first end portion, a second end portion, and a central portion. The actuator further includes magnetic flux developing element mounted coaxial with the central axis and a first and a second electrical current conductor coil. The first coil is mounted in a facing relationship with the first end portion of the core and the second coil is mounted in a facing relationship with the second end portion of the core. The coils are fabricated from a ferromagnetic material and are coaxial with the central axis. The coils have a cross-sectional length in a direction perpendicular to the central axis and a width of insulating space between the turns of the coil in a direction parallel to the central axis.

Abstract: A linear electromagnetic actuator has its core mounted to a can body forming apparatus and its coil attached to re-draw sleeve of such apparatus. The actuator provides for the axial movement of the re-draw sleeve between its fully retracted position and its fully extended position. The re-draw sleeve and the coil are coaxially mounted to each other so that the force exerted on the re-draw sleeve is also coaxial. Once the re-draw sleeve is in its fully extended position, an electromagnet is turned on so that the re-draw sleeve exerts the requisite force on the can material preform. The electromagnet is mounted coaxially about the re-draw sleeve and exerts its force on a magnetic material ring mounted to the re-draw sleeve to hold the re-draw sleeve against the can material preform.

Abstract: An optical table active leveling and vibration cancellation system is disclosed. The system includes an optical table with three active isolation devices connected to the optical table, and one sole pneumatic device, such that the table is supported on all four corners. Each of the isolation devices includes a pneumatic suspension device and an electromagnetic suspension device. The pneumatic suspension device includes a pressurized load chamber, a gimballed piston received in the pressurized load chamber and coupled to the walls of the pressurized load chamber by a thin walled diaphragm, and a support rod extending from the optical table to the floor level. The electromagnetic bearing suspension device includes a magnetic bearing rotor having two planar surfaces and a peripheral surface, and two magnetic bearing stators, the stators each defining a central aperture and each stator being in a spaced apart relationship from each of the rotor planar surfaces. The rotor is secured to the support rod.

Abstract: A video image of the article to be produced is displayed on a computer. A first geometric shape is developed to enclose fully the video image of the article. The first geometric shape provides a video image of a workpiece of machinable stock and the approximate unscaled dimensions of the workpiece. A selection is made from a library of known machine tool tables to select the exact type of machine tool table to be used to produce the article. The video image of the table is positioned visually underneath each of the video image of the article and first geometric shape. The video representation of the machine tool table includes a frame of reference origin which corresponds to the actual machine tool table zero reference.

Abstract: An apparatus to modulate the intensity of a pixel displayed on a screen focused optical energy from a broadband source onto a reflective first face of a planar member. The first face is disposed in said first propagation path at a selected angle thereto to direct optical energy along a second propagation path. A planar mirror is disposed in the second propagation path. The plane of the mirror is actuatable to orientate the mirror within a range of angles to said second propagation path between a first angle limit and a second angle limit. A second focusing lens disposed in the second propagation path to focus optical energy reflected from the first face onto the mirror.

Abstract: Optical energy from a broadband source is focused on an aperture in an opaque member. The energy exiting the aperture is received off axis by a parabolic mirror which collimates the energy. The collimated energy is reflected from each planar mirror of an actuated mirror array. The reflected energy from the mirror array is re-reflected to the aperture by the parabolic mirror. The orientation of each planar mirror determines the flux which passes through the aperture or is reflected by a reflective face of the opaque member. The energy reflected from this face which is derived from each mirror corresponds to the flux intensity for a corresponding pixel. This energy may then be focused on a screen to display the scene.