Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7276822 | Power engine A power engine includes magnetic piston, electromagnetic winding, crankshaft, flywheel and voltage divider; the magnetic piston being adapted to a holder; a magnet being fixed to the piston; the winding being fixed to the holder; positive and negative currents being... | 10/02/2007 |
| 7225965 | Multiple probe power systems and methods for ultrasonic welding An ultrasonic welding probe power supply for powering more than one ultrasonic welding probe with power is provided. The power supply is adapted to provide power only to one welding probe at a time. A ringdown period is monitored between termination of provision of ... | 06/05/2007 |
| 7180254 | Method and apparatus for controlling an oscillating electric motor of a small electric appliance A method of controlling an oscillating electric motor of a small electric appliance, the method including supplying an electric current to a coil to produce a magnetic field emanating from a first motor component and setting a second motor component in an oscillator... | 02/20/2007 |
| 7157815 | Brushless electric motor A solenoid-based propulsion system and methodology comprised of at least one multiple wire coil set solenoid that reversibly receives at least a portion of a magnetic object, wherein the wire coil sets of the solenoid are connected to the energizing control system t... | 01/02/2007 |
| 7145300 | Multi-axis AC servo control system and method A multiple axis servo control implements a multi-tasking PWM control unit to provide PWM signals for multiple axes in a single unit. A time slice mechanism provides axis selection signals based on a system clock signal to permit control parameters of the selected ax... | 12/05/2006 |
| 7129610 | Commutator for an electric motor A commutator includes a support ring and a plurality of conducting segments arranged over a circumference of the support ring. Some of the conducting segments have an electrically insulating portion. The commutator is employed with a device that measures rotation of... | 10/31/2006 |
| 7105958 | Electro-magnetic engine An electro-magnetic engine in which the motive force is electro-magnetism. The electro-magnetic engine comprises a housing structure, cylinder assembly, crankcase assembly, crankshaft assembly, electro-magnetism system and an electrical system. The electro-magnetism... | 09/12/2006 |
| 6906441 | Spherical motor using oscillatory magnetic fields A spherical motor (10) that includes an outer field sphere (12) and an inner armature sphere (14) rotatable therein. Field magnetic elements (26) are disposed on the field sphere (12) and sensor/actuator magnetic elements (42 | 06/14/2005 |
| 6841953 | Control for two or more dc motors, in particular actuators for adjustment of furniture A control for DC motors, in particular actuators driven by a DC motor for adjustment of furniture, such as tables, beds, chairs, etc. includes a pseudomotor which is capable of supplying a voltage that corresponds to the motor speed on the basis of the current and v... | 01/11/2005 |
| 6768281 | Verification of operational capability of a tape drive Verification system logic operates PWM motor drivers for DC motors of a tape drive, and verifies the on time duty cycle period and offset of the PWM motor drivers; verifies DAC current reference and amplifier sense signals against thresholds; and verifies Hall senso... | 07/27/2004 |
| 6731092 | Apparatus and method for initializing stepper motor A stepper motor is initialized so that the exciting signal is applied to coils with the step shifted by half of one electric cycle from the rebounding step being synchronized with the timing when the stopper piece is brought into contact with a fixed stopper. The re... | 05/04/2004 |
| 6680591 | Apparatus for phase angle monitoring of a plurality of vibrating machines A phase angle monitoring apparatus for phase monitoring a vibratory system includes a controller that produces a phase angle control signal representative of the lead or lag between the vibratory movement of two vibrating masses. The phase angle control s... | 01/20/2004 |
| 6342767 | Mobile type X-ray apparatus In a mobile type X-ray apparatus, an input shaft of a cyclo-decelerator is connected to one end of a rotational shaft of a motor, and the other end of the rotational shaft is connected to an encoder and an electromagnetic brake. The cyclo-decelerator is a... | 01/29/2002 |
| 6107770 | Control system for counter-oscillating masses A control system stabilizes the flexible body bending modes of a space, airborne, or ground-based system, while providing angular position control of an oscillating mass connected to a counter-oscillating counterbalance. The actuating mechanism uses two d... | 08/22/2000 |
| 5804933 | Method for operating an adjusting apparatus and means for adjusting a positional device A method and apparatus for operating a positioning device for an adjustable device. The positioning device is mechanically actuated by a bearing connected to a pivotable armature that interacts magnetically with an electromagnet. The electromagnet is ener... | 09/08/1998 |
| 4829217 | Device for controlling movement of a rotating element A safety device for use in a recording apparatus controls the on/off operation and prevents the malfunction of motors for driving a gear flange to rotate a light sensitive drum and for driving an actuating gear and other driving members in accordance with... | 05/09/1989 |
| 4707642 | Actuating device An actuating device comprises a three-dimensionally movable member, a support member for supporting the movable member and an induction unit for imparting an induction force to at least one of the movable member and the support member to three-dimensional... | 11/17/1987 |
| 4706007 | Surface pulse motor A surface pulse motor having a stator and a mover is provided such that the stator is made of a magnetic material of a planar configuration with a number of projections formed on a surface thereof at positions corresponding to the intersecting points of a... | 11/10/1987 |
| 4633148 | Linear drive motor multiple carrier control system Disclosed is a multiple carrier transportation system. The system employs a plurality of linear induction motors positioned along a track. A plurality of carrier units are used for moving work pieces along the track. Each carrier is mounted with a reactio... | 12/30/1986 |
| 4631455 | Method and apparatus for converting a conventional internal combustion engine into a high speed electric motor and generator An electric starter motor and generator is integrated into the structure of an internal combustion engine by making the ferromagnetic pistons of the engine the relatively moving elements in the starter and generator. A coil is solenoidally wound around ea... | 12/23/1986 |
| 4585977 | Electronic motor An electronic motor includes a shaft mounted for rotation about a rotational axis. A plurality of radial lever arms are mounted with respect to the shaft. Each lever arm has an inner end connected to the shaft by a one-way clutch. The clutches allow the s... | 04/29/1986 |
| 4510420 | Servo rotary motor A modified form of apparatus is disclosed, and the preferred and illustrated embodiment thereof utilizes a pulse width modulator circuit to control the duty cycle pulses applied to coils for rotating an engine. The pulse width modulator (PWM) cooperates w... | 04/09/1985 |
| 4498032 | High torque digital stepping motor and control Three radially extending push rods (26, 28, 30) make contact with an undulating cam surface on the periphery of a cam (10). The push rods (26, 28, 30) are driven inwardly by electrical solenoids (94, 96, 98) or fluid motors (106, 108, 110). At the end of ... | 02/05/1985 |
| 4441060 | Vibratory conveyor control arrangement A control arrangement for vibratory conveyors, including bowl and linear types, in which the vibration frequency is set by the behavior of the conveyor and not by an applied frequency. A sensor, SC, senses the behavior of the conveyor and a frequency, of ... | 04/03/1984 |
| 4092568 | Interpolating stepping motor system A driven load is advanced to a selected position by the rotor of a large angle step motor, the housing of which is driven by a small angle step motor having a stationary housing. Driving pulses are fed to the plural phase windings associated with the larg... | 05/30/1978 |
| 4056760 | Method of driving a two coordinate oscillator and circuit arrangement therefor A method and a circuit arrangement for driving a two co-ordinate mechanical oscillator with the aid of a deformed rotating field of forces defined by a plurality of exciting and pick-up components. The power dissipation of the employed circuits is kept at... | 11/01/1977 |
| 4019103 | Electromagnetic motor and generator An electromagnetic motor and generator is disclosed having a pair of solenoids wound on a cylinder, each of said solenoids comprising three separate but connected windings. A magnetizable piston is positioned for reciprocation in the cylinder and is conne... | 04/19/1977 |
| 4012675 | Switching system for solenoid reciprocator A switching system for a solenoid reciprocator motor of a type which has a piston arranged to reciprocate into and out of a solenoid. The switch is an SCR rectifier and the trigger lead to close the switch is pulsed by a commutator operating in unison wit... | 03/15/1977 |
| 4001658 | Oscillator for non-sinusoidal movements An oscillator for generating non-sinusoidal, preferably triangular movements from a harmonic synthesis of individual sine oscillations. The oscillator comprises a plurality of mechanically intercalated resilient oscillator systems which each comprise an e... | 01/04/1977 |
