Abstract: An improved rotor position sensing system for detecting the angular position of the rotor of a rotating machine with respect the stator of the machine that includes a shutter that is affixed to the rotor, a sensor board holder that is positioned within the stator such that it has known orientation with respect to the stator, and a sensor board including rotor position sensors that is positioned within the sensor board holder such that it has a known orientation with respect to the holder.

Abstract: A dynamoelectric machine of the present invention includes a stator, a rotor journaled with respect to the stator, and a rotor shaft having a longitudinal axis extending axially from said rotor. An auxiliary winding and a starting switch operable to de-energize said auxiliary winding upon the motor obtaining a predetermined speed is provided. A centrifugal actuator is mounted on the rotor shaft to actuate the starter switch to de-energize the starter windings when the rotor obtains a predetermined speed. The rotor shaft has a single wide groove formed thereon and the actuator has a sleeve which is journaled on the rotor shaft. The sleeve has an inwardly directed projection sized and shaped to fit in the shaft groove. The sleeve projection and shaft groove interact such that the actuator sleeve cannot be moved relative to the shaft and the switch without a great deal of force.

Abstract: A counterweighted rotor for use in a compressor assembly, the counterweighted rotor including a core assembly, an end ring defining a first end of the rotor, an end ring defining a second end of the rotor, each end ring having a plurality of coining lugs integrally cast thereto, the coining lugs sized for securing weights to the rotor, a plurality of counterweights for balancing the rotor, each of the counterweights including a body formed from powdered metal, the body having an aperture on its radial edge for engaging a coining lug, and a lip integrally formed on the counterweight porprotioned for contour fitting with the inside diameter of the rotor end ring. A method of forming counterbalanced rotor employs forming weights from powdered metal, the counterweights attaching to the rotor by coining over a coining lug of the rotor end ring through an aperature in the counterweight body.

Abstract: A test weight for use with a counterbalanced motor for a compressor assembly, for example, including a body having an opening formed in it and sized to engage the outer diameter of an external eccentrically positioned ball bearing of the counterbalanced motor. A plurality of cantilevered spring fingers are integrally formed with the body along the opening in the test weight for spring gripping the external ball bearing. A plurality of centering pads formed on the fingers hold the center of mass of the test weight close to the center of mass of the ball bearing. In the preferred embodiment, stop tabs project from the centering pads to provide a positive stop upon contact with the outer race of the ball bearing. A method of testing a motor employs the test weight which is attached to the ball bearing to reproduce the application load requirements for the motor, and permits testing of the motor independently of the application.

Abstract: A dynamoelectric machine in the form of an electric motor which can be easily converted between normal motor operation and remote actuation through a simple conversion device. The conversion device includes a remotely located on/off actuator for operating a switch attached to the motor. The switch is mounted to the motor through a simple bracket arrangement, and jumper wires are used to permit the switch element is be interposed in the electrical circuit of the motor without special tools by regular field personnel.

Abstract: A dynamoelectric machine or electric motor construction is disclosed in which the motor has a cylindrical shell having a stator core press-fitted therein and positioned axially with respect to the shell at a predetermined position. The stator core has a central bore which rotatably receives a rotor assembly, the latter having a rotor shaft extending outwardly from each end thereof. An end shield is press-fitted into each end of the cylindrical shell to a predetermined axial position thereby to support bearings journaling the rotor shaft, with the rotor shaft extending axially outwardly through one of the end shields for connection to its application. This one end shield has a seal which is maintained in perpendicular relation to the rotor shaft and which slidingly seals the interior of the motor relative to the end shield and to the rotary application and rotor shaft.