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"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."
Napoleon Bonaparte ; When told of the Robert Fulton steamboat
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| Number | Title | Issue Date |
| 4345228 | Rotary actuator A rotary actuator for imparting a rotational force to a rotary valve member of a multi-way valve device has a cylindrical housing and an electric motor housed therein and being operative to produce a torque corresponding to the input current supplied to t... | 08/17/1982 |
| 4338013 | Electromagnetically driven shutter In the disclosed shutter, shutter blades are reciprocatable between exposure start positions and end positions. Reciprocative rotating electromagnetic drive sources with stators and rotors reciprocate the shutter blades. Magnetic members on the stator fac... | 07/06/1982 |
| 4329672 | Polarized electromagnetic drive for a limited operating range of a control element A polarized electromagnetic drive preferably for actuating a turning servo valve comprises an electromagnetic field iron core which has a central open area and a core receiving recess defined in said core on each side of the open recess with a coil therei... | 05/11/1982 |
| 4326138 | Hair cutting apparatus Hair cutting apparatus comprising a housing; an AC electromagnet fixed in the housing and defining a gap; at least one permanent magnet disposed for reciprocating motion in the gap; a mounting member pivotally mounting the at least one permanent magnet ab... | 04/20/1982 |
| 4303901 | Electromagnetic fuel control element An electromagnetic final control element is proposed which serves to generate a repeatable rotary motion throughout a limited rotary angle. The electromagnetic final control element includes electrical current supply conductors connected between a plug on... | 12/01/1981 |
| 4287457 | Electromagnetic rotating apparatus An oscillating motor capable of 180° displacement and return without return springs.... | 09/01/1981 |
| 4250416 | Moving-coil type motor A moving-coil type motor according to the present invention is composed of a hollow moving coil to which electrical energy is to be applied, a magnetic circuit member made of a material having high permeability which consists of an inner portion disposed ... | 02/10/1981 |
| 4227164 | Electromagnetic rotating apparatus This invention relates to a rotary solenoid or similar electromagnetic rotating apparatus that is capable of smoothly rotating through an angular range of approximately 180 degrees, in both directions, without employing a return spring or other like means... | 10/07/1980 |
| 4219825 | Electric actuating device A printing device for chronocomparators comprising a striker, an ironless cylindrical coil mounted for rotation in an air gap of a magnetic circuit and connected to the striker, the magnetic circuit being formed by a permanent magnet placed inside the coi... | 08/26/1980 |
| 4189699 | Limited-rotation motor with integral displacement transducer The armature of a limited-rotation motor which rotates about an axis relative to a stator is extended axially beyond the stator between arcuate, non-magnetic capacitor plates disposed in a cylindrical array coaxial with the rotation axis. The capacitor pl... | 02/19/1980 |
| 4187452 | Electromechanical torsional oscillator with resonant frequency and amplitude control A limited rotation electromechanical torsional oscillator for driving a mirror in an optical deflection system. A drive armature is mounted on a torsion bar at the opposite end from the torsion bar support. The ends of the armature lie in an air gap betwe... | 02/05/1980 |
| 4186332 | Limited rotation moving iron motor with novel velocity sensing and feedback A device for providing a voltage indicating the angular velocity of rotation of the armature in a limited rotation, polarized, moving iron galvanometer. The device includes a means for providing a first voltage dependent upon the angular velocity of the a... | 01/29/1980 |
| 4164722 | Electromagnetic actuator with torque-compensating poles An electromagnetic actuator has a stator and an armature both made of magnetically permeable material and each having a plurality of projecting poles spaced apart from each other. The armature poles and stator poles cooperate with each other so that each ... | 08/14/1979 |
| 4160177 | Vibratory electromagnetic motor A vibratory electromagnetic motor includes a stator unit, a first rotatable armature and a second rotatable armature. The armatures and the stator unit are arranged to reduce motor noise and vibrations when the armatures synchronously rotate in opposite d... | 07/03/1979 |
| 4145725 | Electromagnetic actuator An actuator comprising a transformer having a fixed primary winding on a magnetic core and a pivotally movable coil linked with the magnetic core and forming a secondary winding of the transformer. A permanent magnet generates a static magnetic field in w... | 03/20/1979 |
| 4135119 | Limited rotation motor A limited rotation motor has a stator and a rotor mounted for limited rotation relative to the stator. The stator is constructed to conduct bias flux through magnetic circuits that extend across air gaps between the stator and the rotor and a drive system... | 01/16/1979 |
| 4110879 | Method of making a limited-rotation motor with integral displacement transducer The armature of a limited-rotation motor which rotates about an axis relative to a stator is extended axially beyond the stator between arcuate, non-magnetic capacitor plates disposed in a cylindrical array coaxial with the rotation axis. The capacitor pl... | 09/05/1978 |
| 4090112 | Electrically damped oscillation motor An electrically damped oscillation motor having a stator component, a rotor component, a permanent magnet which provides a magnetic field across the annular gap transverse to the axis of rotation of the rotor and a drive winding for passing an electric cu... | 05/16/1978 |
| 4084502 | Electric acutating device An electric actuating device for producing limited angular displacements comprising an ironless cylindrical coil mounted for rotation in an air gap of a magnetic circuit, the magnetic circuit being formed by a permanent magnet placed inside the coil and a... | 04/18/1978 |
| 4084403 | Driving mechanism for a timepiece A driving mechanism including a stepping motor having a rotor which rotates through a certain angular interval each time the stepping motor is energized. A driving member having a plurality of radial slots is mounted for rotation about an axis and is rota... | 04/18/1978 |
| 4076998 | Oscillation motor A bearing free oscillation motor has a stator component that defines a cylindrical cavity and a rotor component with a cylindrical portion disposed within the cavity and spaced from the cavity wall by an annular gap of radial width in the range of one-fiv... | 02/28/1978 |
| 4059775 | Linear motor A linear motor having a permanent magnet armature whose interaction with the field provided internally by a closed flux path field core having a winding on one leg, provides the driving force.... | 11/22/1977 |
| 4032805 | Electrical pulse generator for remote reading meter Electrical pulse generator to operate a remote water meter indicator in which the pulse generator is driven by the drive of the meter to cause a magnetic circuit to be opened and closed in accordance with the rotation of the meter drive. The magnetic circ... | 06/28/1977 |
| 4020369 | Compact mechanically-powered electric generator for a camera or other apparatus An electrical component, such as a photoflash lamp that is associated with a photographic camera, is energized by an electric current produced by a compact mechanically-driven electric generator that is located within the camera and coupled to the shutter... | 04/26/1977 |
| 4001659 | Apparatus for spinning a microelectronic substrate In the manufacture of semiconductor components thin films of submicron thickness are in widespread use. To produce the submicron thick films free of entrapped pockets of air, a platform, to which a substrate surface is mounted, is initially caused to osci... | 01/04/1977 |
| 3999369 | Electromechanical watch movement A low-cost electromechanical watch movement comprises a step-by-step motor including a multipolar rotor mounted for rotation within an encased stator and carrying driving pallets operatively engaging with a time-display gear train. The stator and rotor ea... | 12/28/1976 |
| 3992688 | Rotary armature solenoid A rotary solenoid, particularly for use in electronic teleprinters and the like, especially for attachment perforators, etc., in which most of the metal components may be fabricated in the form of stamped sheet metal structures rather than turned or machi... | 11/16/1976 |
| 3970979 | Limited rotation motor with velocity sensing system Moving iron limited rotation motors, and recorders employing such motors, in which a velocity sensor structure is axially spaced from a drive structure that is shorter than another drive structure of the drive system. In the preferred embodiment shown, a ... | 07/20/1976 |
| 3964386 | Method and apparatus for removing surplus ink on printing cylinders A method and apparatus for removing surplus ink from the surface of rotogravure printing cylinders by providing a doctor blade apparatus having an edge adjacent to but spaced from the surface of a rotating printing cylinder. The printing cylinder carries ... | 06/22/1976 |
| 3958410 | Termination device from hairspring-hub to drive coil on two conductor hairspring The termination arrangement comprises a two conductor hairspring and/or hub arrangement in an electric watch for coupling drive pulses to a balance wheel drive coil. A metallic hairspring, which is fastened to the hub, has a conductor which is insulated f... | 05/25/1976 |
| 3959672 | Electric machines A variable reluctance electric motor comprises a stator including at least three pairs of pole pieces with windings surrounding at least one of the pole pieces of each pair, and a rotor structure. The rotor structure defines a pair of opposed pole pieces ... | 05/25/1976 |
| 3952217 | Drive for scanning mirror A drive system for causing a relatively massive scanning element, such as a mirror, to rotate back and forth about a scan axis, with minimum disturbance of the space vehicle which carries it, includes a counterbalance which oscillates about an axis parall... | 04/20/1976 |
| 3949250 | Rotary actuators A rotary actuator comprises a stator structure defining a magnetisable pole piece and an angularly movable rotor structure which defines a pole element. The pole piece and pole element form part of a magnetic circuit and a winding is provided about a port... | 04/06/1976 |
