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| Number | Title | Issue Date |
| 4346318 | Linear motion devices Apparatus for producing linear motion comprising a coil defining an electromagnetic field across a gap; and a permanent magnet disposed within the magnetic field in the gap and arranged to be driven in motion by the magnetic field, the permanent magnet be... | 08/24/1982 |
| 4291248 | Electric motor An electric motor having exceedingly high efficiencies includes three induction coils equally disposed about a circular path, a toroidally-shaped armature is disposed within the induction coils. The armature has a non-magnetic segment placed therein, ther... | 09/22/1981 |
| 4272226 | Fluid pump and method for operating same The fluid pump comprises at least one pumping cylinder having a pumping piston mounted therein for reciprocating movement and including an inlet valve and an outlet valve for permitting the entry and exit, respectively, of fluid into the cylinder in respo... | 06/09/1981 |
| 4243899 | Linear motor with ring magnet and non-magnetizable end caps A linear motor is provided with a coil, a plunger selectively positionable thereby, a permanent magnet concentric with the coil and plunger having oppositely polarized magnetic poles on outer and inner surfaces creating a magnetic circuit extending throug... | 01/06/1981 |
| 4242591 | Orbitally rotating piston engine The engine comprises a generally toroidal cylinder containing a piston having optional permanent magnets or electromagnets disposed thereon. The piston rotates through the cylinder due to a force exerted on it by expanding vapor. A shutter valve extends a... | 12/30/1980 |
| 4242606 | Magnetic final control element for a regulator apparatus A preferred form of embodiment of the final control element comprises a direct-current electromagnet, with whose armature the regulator rod is connected; an inductive displacement transducer generating an electric output signal proportional to the stroke ... | 12/30/1980 |
| 4240728 | Photographic camera shutter electromagnetic system for controlling photographic light admitted to camera Photographic camera shutter apparatus having at least one drivable control part arranged for reciprocation for controlling the photographic light admitted to the camera, e.g. a diaphragm aperture ring or a shutter blade ring, and an electromagnetic drivin... | 12/23/1980 |
| 4235153 | Linear motion, electromagnetic force motor An electromagnetic motor is provided with a samarium cobalt permanent magnet comprising a plurality of radially abutting segments. A combination of linear and non-linear springs with a force gradient larger than the magnetic force gradient facilitate moto... | 11/25/1980 |
| 4234831 | Compound rotary and/or linear motor A compound rotary and/or linear motor comprises two interposed magnet systems of which at least one is variable by an electronic control system to generate rotary and/or linear motion of the other. One of the two magnet systems consists of axially consecu... | 11/18/1980 |
| 4220899 | Polyphase linear motor The linear motor comprises a stator and an armature mounted for travel along the length of the stator. The stator includes an elongated inner flux-carrying structure extending in the direction of armature travel. A plurality of stationary coils are provid... | 09/02/1980 |
| 4217507 | Linear motor A linear motor construction in which a plurality of parallelpiped shaped permanent magnets are retained within an easily molded spool having an axial bore formed through the axis thereof. A coil which may be electrically excited is wound about the spool a... | 08/12/1980 |
| 4215283 | Linear stepping motor A linear stepping motor comprising a stator having a central passageway extending therethrough and a secondary in the form of an elongated cylindrical member disposed within the passageway. The stator is formed of a plurality of coil groups, each group in... | 07/29/1980 |
| 4214178 | Rotating electromagnetic solenoid motor A motor comprising a plurality of electromagnetic solenoids forming a core passageway for an armature consisting of alternatingly magnetizable and non-magnetic elements. Only one magnetizable element is in an energized solenoid at any given time, thus pro... | 07/22/1980 |
| 4210831 | Involute lamination armature for a linear reciprocating motor A generally cylindrical armature for a linear motor includes an outer diameter region of involute laminate construction. Restricting the laminate assembly to an outer diameter region of the armature, which region constitutes a high magnetic flux density r... | 07/01/1980 |
| 4197488 | Electrical machine An electrical machine having an armature capable of both rotational movement and translational movement and which can be driven by alternating current or by stepwise control pulses. The coil of the machine is divided into two half-coils which are electric... | 04/08/1980 |
| 4113142 | Device for contactless separation of individual ferromagnetic components from a flow of components A device for contactless separation of individual ferromagnetic components from a flow of components, comprising a magnet and guards arranged between pole pieces. The guards are made from a non-magnetic material and confine a channel through which compone... | 09/12/1978 |
| 4104548 | Electric motor for general purposes (II) Underlying the present invention is the recognition that a conventional electric motor, which has its rotor move only in passing relation to the stator magnetic field-producing coils, is the significant source of inefficiency delaying the development of a... | 08/01/1978 |
| 4062421 | Bicycle drive system A power drive system to augment pedalling of a bicycle including a reversible magnetically balanced electromagnetic field positioned in proximity to one wheel of the bicycle, at least one permanent magnet mounted on the wheel to pass through the electroma... | 12/13/1977 |
| 4044881 | Serial printer with linear motor drive A serial line printer uses a linear stepper motor of the variable reluctance type in which the toothed stator bar acts as a guide and support for the print mechanism carrier. Sensor elements movable with the carrier sense the presence of the teeth of the ... | 08/30/1977 |
| 4037122 | Linear actuator A linear actuator comprises a toothed magnetic motor bar and a motor element having a pair of E-cores on opposite sides of the motor bar. Rollers attached directly to the E-cores ride on the motor bar to maintain a fixed air gap between the motor bar and ... | 07/19/1977 |
| 3992255 | Control rod drive mechanism for a nuclear reactor A drive mechanism for a control rod of a nuclear reactor adapted for rapid refueling is disclosed which electromechanically grips and moves a control rod in a step-by-step manner. Locking apparatus is included with the drive mechanism which locks the cont... | 11/16/1976 |
| 3984706 | Electromagnetic actuator for voice coil An electromagnetic actuator for linear driving of movable heads of a magnetic disc unit in an information processing system. A plurality of slits or plates are provided with a magnetic pole inscribed directly on the internal surface of a permanent magnet,... | 10/05/1976 |
| 3965377 | Linear force generator A valve pin is positioned to open and close a bleed port from the suction side of a carburetor to the exterior of the carburetor in response to variations in electrical control current. Control current is alternatively derived from sensing sources respons... | 06/22/1976 |
| 3959071 | Method and apparatus for a nuclear reactor for increasing reliability to scram control elements A method and apparatus for increasing the reliability of linear drive devices of a nuclear reactor to scram the control elements held in a raised position thereby. Each of the plurality of linear drive devices includes a first type of holding means associ... | 05/25/1976 |
| 3946258 | Gripper type linear motion device A linear motion device of the type having a plurality of gripper assemblies for engaging projections on a linearly movable element to effect stepwise movement thereof. Each of the gripper assemblies is movable into and out of engageable relationship with ... | 03/23/1976 |
