Abstract: A method is provided for assembling a device in a preselected assembly position onto a rotatable shaft of a prime mover with respect to an opening in an end plate of the prime mover through which the shaft extends so as to preclude contamination of a lubricant in a lubrication system of the prime mover communicated with the opening in the event the prime mover is operated in an environment in which a fluid imcompatible with the lubricant may be presented to at least one of the end plate and an exterior end section of the shaft extending beyond the opening.

Abstract: An explosion proof submersible gearmotor in which a gear reducer has a housing with a sealed chamber and input and output shafts with a gear train connecting the input and output shafts, and in which a sealed motor is mounted on the gear reducer housing and a wall of the gear reducer forms one end wall of the motor, the shaft of the motor being directly connected to the input shaft of the gear reducer. The chamber in the gear reducer contains a non-conducting lubricant, and a moisture-sensing probe extends in the lubricant in the chamber for sensing the presence of water and transmitting a signal in response thereto, indicating a failure in one or more seals of the gear reducer. The operation of the motor of the gear reducer is then either automatically or manually interrupted until the unit has been serviced and repaired.

Abstract: An explosion resistant motor has a metal casing with a cluster of electrical terminals extending from a wall thereof and sealed thereto. A section of metal pipe has one end welded to the casing wall and surrounds the terminal cluster. A metal clip mounts an inherent thermal overload device in the open end of the pipe. A positive temperature coefficient resistance starting relay in the pipe is coupled between one motor terminal and one overload terminal. Electrical leads are connected to another motor terminal and another overload terminal and extend out of the pipe through a conduit welded to the wall thereof. A pipe cap is threaded on the open end of the pipe to complete an explosion resistant enclosure for the overload and starting relay, and also to secure the overload in place.

Abstract: An explosion-proof canned electric motor for use at elevated temperatures wherein the upper portion of the motor housing contains the stator windings and the rotor and is connected with a terminal box by means of a tubular heat barrier. The terminal box is disposed at a level below the upper housing portion and has an annular venting orifice in the lowermost part thereof so that condensate which accumulates in the housing flows toward the orifice. Such condensate is absorbed by a cake of diatomaceous earth or another suitable porous desiccant which is placed into the path of condensate flow toward the orifice. The desiccant also removes moisture from air which flows into the terminal box, and the desiccant is relieved of accumulated moisture during starting of the motor when the air in the housing expands as a result of heating and flows through the pores of the desiccant on its way into the orifice.

Abstract: A fire safety transmission apparatus comprising an explosion-proof container, an adapter plate secured to the container, a cylindrical sleeve mounted to the adapter plate defining a central bore, allowing communication with the interior of the container. The sleeve bore is stepped, defining seats for a plurality of ball bearing races mounted therein. A rotatable stepped shaft having a diameter adapted to fit within the central bore rests on the ball bearing races. The shaft is connected to a motor mounted in the explosion-proof container with the spacing defined between the inner wall of the cylindrical sleeve and the outer surface of the freely rotating shaft being sized a predetermined tolerance for a predetermined length sufficient to prevent a flame from passing therethrough.

Abstract: An enclosure is disclosed for use with motors in an outdoor environment. The enclosure serves to prevent moisture and dirt from contacting the motor housing or fan, thereby to prevent condensation inside the motor housing. The enclosure comprises a cylindrical moisture shield disposed about the motor housing to which is attached a rain canopy at one end thereof. An appropriate spacing is provided between the rain canopy and the moisture shield to permit air to be drawn inside of the enclosure to permit air cooling of the motor during operation.

Abstract: An apparatus for converting the rotational speed of a shaft, particularly of the driving shaft of a log propeller shaft into a proportional impulse frequency is provided with a rotary permanent magnet, means to couple it with the shaft, and at least one magnetically actuated switch positioned within the effective range of the permanent magnet, these electrical elements being arranged in a liquidproof housing of an improved construction simultaneously contributing to an optimum space saving arrangement of all parts involved.

Abstract: A motor-compressor unit of the sealed type for refrigerating appliances, characterized by the combination of the following features:A. the motor which drives the compressor is a direct current electric motor of the commutator type;B. the chamber containing the motor is separated from the chamber containing the compressor by sealing means for realizing a seal tight with regard to the compressor lubrication oil and with regard to the carbon dust generated by the sliding of the brushes of the commutator,C. in the chamber containing the motor there are disposed, adjacent the commutator, absorption means for chemically absorbing the products originating from the decomposition of the refrigerating fluid caused by damage the compressor and the other components of the refrigerating appliance.

Abstract: A construction for an electric motor, which motor is adapted to be installed and operated in a generally vertical mode. The rotor shaft of the motor extends upward through the top wall (or cap) of the stator housing. With this vertical orientation, however, there exists the possibility of unwanted liquids flowing downward alongside the rotor shaft into the housing where they could cause damage to the motor windings, etc. To protect sensitive interior parts of the motor, an annular trough is interiorly provided for capturing such liquids as may enter the housing by flowing downward along the rotor shaft. A shield or skirt is sealingly attached to the rotor shaft within the housing at a position where the shield extends radially outward over the trough. Drainage passages connect the trough to the exterior of the housing, such that unwanted liquids will be initially captured and then drained from the housing before they can reach an interior location where they could cause damage.