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| Number | Title | Issue Date |
| 5722154 | Method for setting skew angle A skew angle setting tool and method for assisting in orienting the skew pin of an apparatus having a mandrel for stacking rotor laminations for dynamoelectric machines is described. The skew pin is movable to have at least one predetermined angular orien... | 03/03/1998 |
| 5696430 | Circuit, motor, and method generating a signal representing back EMF in an energized motor winding A motor includes a stationary assembly and a rotatable assembly in magnetic coupling relation thereto. The stationary assembly includes a winding, the rotation of the rotatable assembly inducing a back EMF in the winding. A power supply for supplying a vo... | 12/09/1997 |
| 5684347 | Mounting clip for a motor protector A mounting clip for securing a motor protector to the stator of an electric motor is described. In one embodiment, the mounting clip includes a protector holding region formed by a base portion, a back portion, arm portions, and a retaining member. The pr... | 11/04/1997 |
| 5682826 | Systems and methods for controlling a draft inducer for a furnace Systems and methods for controlling a draft inducer for use with a furnace. The draft inducer includes a fan for inducing a draft in the furnace combustion chamber that causes a pressure drop across a heat exchanger assembly for moving exhaust combustion ... | 11/04/1997 |
| 5680021 | Systems and methods for controlling a draft inducer for a furnace Draft inducer systems and methods for use with a furnace. A motor drives a fan in response to a motor control signal for inducing a draft which is a function of motor speed and motor torque. A processor defines a speed/torque operating curve having a mini... | 10/21/1997 |
| 5677584 | Bearing assembly for dynamoelectric machines A bearing assembly including a bearing member with a passageway therethrough at least in part defining a cylindrical journaling surface having a central axis and a preselected axial length is described. A partial circumferential or spherical surface on at... | 10/14/1997 |
| 5676069 | Systems and methods for controlling a draft inducer for a furnace Systems and methods for controlling a draft inducer for use with a furnace. The draft inducer includes a motor for driving a fan for inducing a draft in the furnace that causes a pressure drop across the heat exchanger of the furnace. A memory stores info... | 10/14/1997 |
| 5675231 | Systems and methods for protecting a single phase motor from circulating currents A single phase motor system and method for preventing excessive circulating currents in the motor. The motor has a power supply link including power switches responsive to a motor control signal for connecting the motor winding to a power supply in altern... | 10/07/1997 |
| 5675228 | Methods and apparatus for controlling energization of a motor Methods and apparatus for controlling energization of an appliance motor are described. The apparatus, in one embodiment, may include a condition responsive switch secured within an appliance motor casing to control the energization of the appliance motor... | 10/07/1997 |
| 5668429 | Dynamoelectric machine and method for manufacturing same A dynamoelectric machine constructed for speed and accuracy of manufacturing has a stator core constructed of 90° symmetrical stator laminations and the windings have differing numbers of poles which overlap in slots of the stator core are wound of the c... | 09/16/1997 |
| 5657638 | Two speed control circuit for a refrigerator fan An apparatus for driving a fan as part of a refrigerator is disclosed. The refrigerator has a compartment, a compressor, an evaporator and a condenser. A temperature sensor is positioned in association with the compartment and outputs a sensed temperature... | 08/19/1997 |
| 5646491 | Electrical motor with a differential phase back EMF sensing circuit for sensing rotor position A motor having a differential phase back EMF sensing circuit for sensing rotor position includes a stationary assembly with at least three windings. The rotation of the rotor induces a back EMF in the windings. A control circuit energizes each of the wind... | 07/08/1997 |
| 5640064 | Dynamoelectric machine and method for manufacturing same A dynamoelectric machine constructed for speed and accuracy of manufacturing has a stator core constructed of 90° symmetrical stator laminations and the windings have differing numbers of poles which overlap in slots of the stator core are wound of the c... | 06/17/1997 |
| 5636432 | Tandem press system for manufacture of stator and rotor cores A tandem press system for the high speed manufacture of rotor cores and stator cores of electric motors. The tandem press system includes a rotor press and a stator press arranged in series for stamping out laminations from a web of stock material and pre... | 06/10/1997 |
| 5631509 | Motor having thermostatically controlled or limited space heater An apparatus adapted to be connected to a power source, the apparatus for driving a rotatable component. A motor has a stationary assembly and a rotatable assembly in magnetic coupling relation to the stationary assembly, the rotatable assembly in driving... | 05/20/1997 |
| 5630461 | Method for making stator frame for dynamoelectric machine A dynamoelectric machine having a stator housing or frame made by a lost foam process utilizing a unitary single-piece vaporizable pattern. The stator housing may be made from a molten metal such as cast iron or aluminum, and has an annular wall having in... | 05/20/1997 |
| 5619871 | Laundry machine A laundry machine having an electronically commutated motor which includes a plurality of salient pole pieces disposed on preselected pitch axes so as to extend generally outwardly from an outer circumferential surface of a yoke section, with base section... | 04/15/1997 |
| 5616995 | Systems and methods for controlling a draft inducer for a furnace Systems and methods for controlling a draft inducer for use with a furnace. The draft inducer includes a fan for moving combustion chamber gases for inducing a draft in the furnace combustion chamber that causes a pressure drop across a heat exchanger. Th... | 04/01/1997 |
| 5610456 | Permanent magnet direct current motor Disclosed is an improvement to the stability of D.C. motor brushes mounted in brush boxes with wings is improved by angling the wings toward the commutator such that the brush spring contacts the brush at one or more points intermediate the ends of the br... | 03/11/1997 |
| 5604654 | Permanent magnet direct current motor Disclosed is an improvement to the stability of D.C. motor brushes mounted in brush boxes with wings is improved by angling the wings toward the commutator such that the brush spring contacts the brush at one or more points intermediate the ends of the br... | 02/18/1997 |
| 5602957 | Permanent magnet direct current motor Disclosed is an improvement to the stability of D.C. motor brushes mounted in brush boxes with wings is improved by angling the wings toward the commutator such that the brush spring contacts the brush at one or more points intermediate the ends of the br... | 02/11/1997 |
| 5598072 | Regenerative braking circuit utilizing separately excited motor A separately excited DC motor system is arranged to provide operation in a smooth, continuous electrical retarding mode. A series contactor connects the motor armature to a DC power source and is controlled so as to immediately open upon sensing of a need... | 01/28/1997 |
| 5592059 | System and methods for driving a blower with a motor A system for driving a blower of a heating, ventilating, and/or air conditioning (HVAC) system. The blower discharges heated or cooled air to a space for conditioning the air in the space by changing its temperature. A motor drives the blower at a speed o... | 01/07/1997 |
| 5592058 | Control system and methods for a multiparameter electronically commutated motor A system which drives a component of a heating, ventilating, and/or air conditioning (HVAC) system in response to a system control signal such as a temperature signal provided by a thermostat. The system includes a motor having a stationary assembly and a... | 01/07/1997 |
| 5584119 | Apparatus for setting skew angle A skew angle setting tool and method for assisting in orienting the skew pin of an apparatus having a mandrel for stacking rotor laminations for dynamoelectric machines is described. The skew pin is movable to have at least one predetermined angular orien... | 12/17/1996 |
| 5585774 | Condition-responsive electric switch mechanism A condition-responsive electric switch mechanism having a snap-acting bistable spring switch element carrying a movable contact, and an actuator movable in response to a detected condition to operate the bistable spring switch element. The spring switch e... | 12/17/1996 |
| 5565760 | Electrical propulsion systems for a golf car A method and apparatus for preventing overspeed of an electrically powered golf car having a shunt wound direct current electric motor with an armature winding and a field winding serially connected to respective switching devices and to a source of on-bo... | 10/15/1996 |
| 5563463 | Permanent magnet rotor A permanent magnet rotor for an electronically commutated motor (ECM) has a core, a plurality of magnetizable elements spaced around the core, and a thin-walled retaining shell which has been stretched around the core and magnetizable elements to hold the... | 10/08/1996 |
| 5557182 | System and methods for controlling a draft inducer to provide a desired operating area A system and methods to provide a desired operating area for a motor driving a fan for inducing a draft in a vent of a heating, ventilating and air conditioning system. The motor includes a stationary assembly and a rotatable assembly. The stationary asse... | 09/17/1996 |
| 5524333 | Method of assembling a pressure responsive control device A pressure sensitive control device having a housing made up of a plurality of housing members, a diaphragm, a bistable snap-disc, a switch and an actuator. The snap-disc moves from one configuration to another upon application of pressure over a predeter... | 06/11/1996 |
| 5522125 | Method for making armatures for electrodynamic machines An operator sequentially inserts into an automated system for making armatures for electrodynamic machines loaded magazines containing a required number of hairpin conductors for an armature to be made, an armature core comprising a plurality of substanti... | 06/04/1996 |
| 5519273 | Fitting for coupling an electric motor and a motor lead protective conduit The present invention relates to an assembly for protecting motor leads extending between an electric motor shell and an external control unit or power source. The present invention in one form includes a fitting configured for insertion into a notch form... | 05/21/1996 |
| 5513058 | DC link circuit for an electronically commutated motor A protective DC link circuit connecting a motor to a power supply. The motor has a stationary assembly and a rotatable assembly in magnetic coupling relation thereto and includes windings adapted to be commutated in at least one preselected sequence. The ... | 04/30/1996 |
| 5506487 | Systems and methods for driving a compressor with a motor A system which drives a compressor of a refrigeration system. The system includes a motor having a stationary assembly and a rotatable assembly. The stationary assembly includes windings adapted to be energized in at least one preselected sequence. The ro... | 04/09/1996 |
| 5502609 | Electric circuitry for preventing contactor tip contamination in dry switching applications A contactor control system for a DC electric power system for reducing contactor tip contamination from dry-switching includes a first switch connected in circuit between a power source and a controller for enabling the controller upon closure of the firs... | 03/26/1996 |
| 5497039 | Vibration reduction system for an electric motor A structured product family of dynamoelectric machines for use in a plurality of applications has a frame with a closed end, and a set of permanent magnets is adhesively secured within the frame. An armature disposed in the frame for interaction with the ... | 03/05/1996 |
| 5491978 | Electronically commutated motor for driving a compressor A system which drives a compressor of a refrigeration system at one or more speeds. The system includes a motor having a stationary assembly and a rotatable assembly. The stationary assembly includes windings adapted to be commutated in at least one prese... | 02/20/1996 |
| 5492273 | Heating ventilating and/or air conditioning system having a variable speed indoor blower motor A system which drives an indoor blower of a heating, ventilating, and/or air conditioning (HVAC) system in response to a system control signal. The system control signal has a BLOWER DEMAND state and a BLOWER END DEMAND state. The system comprises a motor... | 02/20/1996 |
| 5484971 | Electrical contact having a precious metal extrusion extending from a contact surface An electrical contact comprises a body formed of a precious metal in which the precious metal defines a contact surface of the body. At least one projection of the precious metal is formed generally centrally of the contact surface so as to extend therebe... | 01/16/1996 |
| 5473229 | Interface between programmable electronically commutated motor and personal computer and method of operation A microcontroller with external memory interacts with a host computer or terminal via a fully isolated RS232 serial interface. An eight-bit D/A converter transforms signals generated digitally in the microcontroller. The low level analog signal at the D/A... | 12/05/1995 |
