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 |
| 7898140 | Brushless slip ring for a wind turbine and method of assembly A brushless slip ring has a first conductive rotating member, and a second conductive non-rotating member that is positioned a predetermined distance away from the first conductive rotating member. A conductive semi-solid material electrically couples the first cond... | 03/01/2011 |
| 7363399 | Method, apparatus and computer program product providing storage network dynamic tuning of I/O flow with Queue Depth In accordance with a computer program product, apparatus and a method there is provided a redundant network wherein a host computer operates with a plurality of storage devices by monitoring conditions of the multipath storage network and controlling a storage multi... | 04/22/2008 |
| 7352092 | Integrated motor and controller assemblies for horizontal axis washing machines A horizontal axis washing machine includes an integrated motor and controller assembly. The controller is mounted to the electric motor with the controller positioned under a tub of the washing machine. The tub provides drip protection for the controller during oper... | 04/01/2008 |
| 7345396 | Metallic laminations for magnetic circuits Metallic laminations for magnetic circuits. Some of the illustrative embodiments may be a magnetic circuit comprising a low reluctance magnetic flux path comprising a plurality of stacked metallic laminations (each lamination having an edge), and an air gap in opera... | 03/18/2008 |
| 7307368 | DC motor A direct current motor including a rotor having a rotation shaft and rotor coils, a stator configured to apply a magnetic field to the rotor via magnetic poles of the stator opposing magnetic poles of the rotor, an electrical parts mounting base board fixed on the r... | 12/11/2007 |
| 7274125 | Current collector ring for a generator having balance resistors An electrical generator having a stator assembly and a rotor assembly is provided. The rotor assembly has a rotor member, a first collector ring, and first and second rotor coils. The first collector ring is disposed proximate an exterior surface of the rotor member... | 09/25/2007 |
| 7259494 | Vehicular alternator with a pair of dissimiliar metal alloy collector rings A vehicular alternator includes a rotor, a stator and a brush device. The rotor includes a rotor coil wound around pole cores and a pair of collector rings electrically connected with the rotor coil. The stator is disposed around an outer periphery of the rotor acro... | 08/21/2007 |
| 6987344 | High power rotary transformer with bus duct assembly A rotary transformer has a bus duct assembly that extends through the hollow shaft of a rotary transformer from collector or slip rings positioned above a drive motor for the rotary transformer to end windings of the rotor positioned most remote from the drive motor... | 01/17/2006 |
| 6894419 | Current passing circuit board for rotary electric machine inserted in molded resin One current passing circuit board is constituted by one metal plate in which a continuous current passing pattern that is to be separated in a plurality of current passing patterns is formed, and molded resin in which the metal plate is inserted. The current passing... | 05/17/2005 |
| 6856062 | Homopolar machine with shaft axial thrust compensation for reduced thrust bearing wear and noise A homopolar machine produces an axial counter force on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counter force is produced through magnetic interaction between the shaft and the... | 02/15/2005 |
| 6753634 | Bus duct assembly for high-power rotary current transformer system A rotary transformer system (20) comprises a rotatable shaft (28) having at least one and preferably plural electrically conductive slip rings (27) mounted thereon. The slip rings (27) of the phase planes are electrically connected to the... | 06/22/2004 |
| 6664679 | Dynamoelectric machine including insulator and associated methods A dynamoelectric machine 20 includes a rotor assembly 24 and a main lead insulating assembly 26. The rotor assembly 24 includes a shaft 28 having a main lead receiving recess 32 in its outer surface, a rotor 30 mounted to the shaft 28, and a stator 22 sur... | 12/16/2003 |
| 6652360 | Method and apparatus for creating a groove in a collector ring of an electrical device A method and apparatus for creating a groove in the surface of a collector ring for use in an electrical device. The method and apparatus can be used to create a new groove in the surface of a collector ring having none, or can be used to enhance or re-fo... | 11/25/2003 |
| 6628033 | Reduction of induced magnetic forces on current collectors in homopolar machines having high magnetic fields A homopolar machine produces an axial counterforce on the rotating shaft to compensate for the load on the shaft's thrust bearing to reduce wear and noise and prolong bearing life. The counterforce is produced through magnetic interaction between the shaf... | 09/30/2003 |
| 6489701 | Superconducting rotating machines A superconducting rotating machine has a relatively compact construction while still providing a relatively high output power, thus the superconducting rotating machine has an increased power density characteristic. The superconducting rotating machine in... | 12/03/2002 |
| 6489702 | Alternator An alternator adapted for use with a motor vehicle includes rotor assembly and a stator assembly, which may be like the rotor and state assemblies of brush-type alternators, and also a contact assembly that includes two relatively low-friction, electrical... | 12/03/2002 |
| 6472791 | Envelope for slip-ring contacting members in high-power rotary current collector system An electrical current collector system (20) comprises a rotatable shaft (28) having at least one and preferably plural electrically conductive slip rings (27) mounted thereon. For each phase, a slip ring is paired with a fixed conducting ring assembly (44... | 10/29/2002 |
| 6218761 | Armature with plane commutator for an electric motor The armature (26) has metal segments (42) separated from each other by grooves (46) distributed around its circumference on a front side thereof. Commutator covers (48) are placed on the segments (42) and soldered with the segments (42) in order to form t... | 04/17/2001 |
| 6114792 | Commutator motor with a magnetic field deflecting moving charge carriers in the commutator brush In order to reduce the wear on the brushes (6) and thus extend the operating lives of the brushes and of the commutator motor, brush sparking on the trailing edges (6.2) of the brushes (6) is reduced a commutation magnetic field (M), produced for example ... | 09/05/2000 |
| 6075305 | Dynamo-electric machine A dynamo-electric machine satisfies an expression Req ࣙ(.rho.0 .multidot.(r1*͌)/(S/3))*(2.5) where .rho.0 (Ω.multidot.m) is the resistivity of armature coil, S (m2) is the cross-sectional area of the conductor portion... | 06/13/2000 |
| 5962946 | Method of making a flat commutator A flat commutator for an electric motor of a vehicle fuel pump. The commutator, is made with a one-piece carbon ring having a flat outer face, a one-piece conductor ring underlying the outer face of and embedded in the carbon ring, and a housing of a plas... | 10/05/1999 |
| 5949174 | Commutator for two speed electric motor and motor incorporating same A commutator is disclosed which is adapted to be mounted on a rotor shaft of an electric motor for cooperation with electrical contacts of the motor, the commutator being capable of accommodating two speeds of the motor. The commutator includes a support ... | 09/07/1999 |
| 5907208 | Rotor for an electric motor A rotor for an electric motor, including a shaft (1), a lamination parcel (2) and a current distribution element (3), which are mounted on the shaft (1) coaxially therewith and for joint rotation therewith, and insulating sleeve members (4,5) coaxially mo... | 05/25/1999 |
| 5789842 | Alternator rings and cylindrical commutators made of a sintered copper-graphite composite material The invention relates to a rotating element of an electrical machine, rotating electrical contact parts and electrical machines containing these devices.... | 08/04/1998 |
| 5679996 | Assembled commutator An assembled commutator has a segment support portion and a housing portion. The housing portion has housing members formed with axially extending "T"-shaped recesses and transversely extending slots for receiving armature leads. Insulation displacing ter... | 10/21/1997 |
| 5600418 | Donor rolls with exterior commutation A donor roll for transporting marking particles to an electrostatic latent image recorded on a surface is provided. The donor roll is adaptable for use with a power source to assist in transporting the marking particles. The donor roll includes a rotatabl... | 02/04/1997 |
| 5589917 | Donor rolls with magnetically coupled (Transformer) commutation A donor roll for transporting marking particles to an electrostatic latent image recorded on a surface is provided. The donor roll includes a rotatably mounted body and an electrode member mounted on the body. The donor roll further includes a magneticall... | 12/31/1996 |
| 5402022 | Electromagnetic rotary actuator A rotary actuator (1) with magnetically acting restoring element (18), particularly for controlling a throttle cross-section, is intended to be simplified in its structure and the torque variation of the restoring element (18) is to be improved. For this ... | 03/28/1995 |
| 5280225 | Method and apparatus for multi-axis rotational motion An apparatus for multi-axis rotational motion includes a spherical structure (102) and a housing (104), the housing (104) at least partially enclosing the spherical structure (102) and movably coupled thereto. Magnetically compliant poles (106, 107, 108, ... | 01/18/1994 |
| 5113107 | Rotary actuator Disclosed is a rotary actuator having a rotor and a stator which rotatably supports the rotor. The stator includes a coil bobbin, a stator coil, a pair of tapered poles and a yoke. The coil bobbin is formed from a non-magnetic material into a cylindrical ... | 05/12/1992 |
| 4594539 | Light valve A light valve has a pair of rotating vanes for controlling the cross section of a light beam passing between the vanes. The vanes rotate on corresponding shafts, each controlled by its own integral motor. Separate feedback control systems produce electric... | 06/10/1986 |
| 4422918 | Current-conducting assembly for a traveling wire-electrode A current-conductor assembly for conducting a machining current to a wire electrode in a wire-cutting electroerosion machine comprises a pair of coplanar wheels rotatable about their respective shafts and having their respective peripheries for receiving ... | 12/27/1983 |
| 4208601 | Distributor for electric D.C. machine The present invention relates to a distributor for an electric D.C. machine comprising a commutator associated with two elastically deformable conductor rings, each forming a wing placed above the commutator on the path of at least one roller carried by a... | 06/17/1980 |
| 4142119 | Rotary electric device An electric motor having a low speed shaft that rotates at a speed much slower than the speed of a high speed shaft comprises a stator having a cylindrical bore with a longitudinal axis and a rotor that carries the low speed shaft and rotates in the bore ... | 02/27/1979 |
| 4117363 | DC motor Disclosed is a DC motor comprising a rotor consisting of a rotary shaft, a disk carried by the rotary shaft coaxially thereof and a plurality of prefabricated coils mounted on the disk and equiangularly spaced apart from each other; brushes attached on th... | 09/26/1978 |
| 4098546 | Electrical conductor assembly A full rotational freedom, substantially zero friction electrical conductor assembly for conducting electrical currents between relatively rotatable members of sensitive instruments such as gyroscopic devices and the like is disclosed. Each electrical tra... | 07/04/1978 |
| 3962593 | Electromagnetic motor An electromagnetic impulse motor having a stator and a rotor arranged for rotation relative to the stator. Permanent magnets are mounted on either the rotor or stator, while electromagnets are mounted on the other of the rotor and stator in order to coope... | 06/08/1976 |
