Abstract: An electric motor lubrication system and a method of making the same are disclosed. The motor is a unit bearing motor with an oil reservoir at the bottom of a vertically disposed shaft. The motor rotor has a shaft jounaled in a bearing post on the frame, and the lower end of the poast has two grooves to receive an oil-saturated wick. Each groove has a flat bottom which extens at at least a 5-degree angle relative to the shaft axis, and the intersection of the flat bottom with the shaft aperture forms a plow edge having a component of force directing oil toward the bearing upon shaft rotation. This readily supplies oil upwardly for a vertical shaft motor. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: An electric motor lubrication system and a method of making the same are disclosed. The motor is a unit bearing motor with an oil reservoir at the bottom of a vertically disposed shaft. The motor rotor has a shaft journaled in a bearing post on the frame, and the lower end of the post has two grooves to receive an oil-saturated wick. Each groove has a flat bottom which extends at at least a 5-degree angle relative to the shaft axis, and the intersection of the flat bottom with the shaft aperture forms a plow edge having a component of force directing oil toward the bearing upon shaft rotation. This readily supplies oil upwardly for a vertical shaft motor. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: A unit-bearing motor wherein a drawn steel cup-shaped frame has a base and a longitudinal axis, an elongated metallic post is shaped with an outer cylindrical mounting surface at a first end and disposed in a coaxial aperture in the frame base, an annular shoulder is formed on the metallic post adjacent the outer mounting area, and this shoulder abuts a mounting area surrounding the coaxial base aperture. A jig is used to locate the post coaxially in the cup-shaped frame, with the post first end in the base aperture and the shoulder abutting the mounting area, and then a brazing liquid, such as silver solder, is flowed into the space between the post and the base and allowed to harden to secure the post in the frame. The post has a journal bearing aperture to provide a unit bearing for a rotor cooperating with the stator carried in the frame.

Abstract: A three-phase motor has six salient teeth for a two-pole motor or twelve salient teeth for a four-pole motor. The motor stator has at least three main field windings on the salient teeth to form either two or four poles, with the teeth being equal in number to at least three times the number of the poles. Each main field winding includes on one tooth a first coil connected in series with the second coil on another tooth, so that at a given instant, pole faces of opposite polarity are established on these two teeth. The coils of the at least three main field windings are wound and connected so that each coil is a one-third pitch of three adjacent teeth, with pole faces of the same polarity at a given instant. The end result is that these three main field windings established a uniform rotating field to provide driving force to a rotor.

Abstract: A water-resistant fan motor has a water spray deflector which includes a closed central portion fan blade and a closed, convex, coaxial deflector between the fan blade and the motor housing. This convex deflector establishes a first small gap between the periphery of the rotatable convex deflector and a portion of the housing substantially at the outer diameter thereof. A second small gap between a portion of the rotor and a portion of the housing is unaligned with the first small gap and an enlarged cavity is in series between the first and second small gaps. This construction establishes a labyrinth for any water spray, and hence inhibits any water spray entering the interior of the motor housing. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications and is not to be construed as a limitation on the scope of the claimed subject matter.

Abstract: A three-phase motor is disclosed which has six salient teeth for a two-pole motor or twelve salient teeth for a four-pole motor. The motor stator has at least three main field windings on the salient teeth to form either two or four poles, with the teeth being equal in number to at least three times the number of the poles. Each main field winding includes on one tooth a first coil connected in series with the second coil on another tooth, so that at a given instant, pole faces of opposite polarity are established on these two teeth. The coils of the at least three main field windings are wound and connected so that each coil is a one-third pitch of three adjacent teeth, with pole faces of the same polarity at a given instant. The end result is that these three main field windings establish a uniform rotating field to provide driving force to a rotor.

Abstract: A method for making a unit-bearing motor wherein a drawn steel cup-shaped frame has a base and a longitudinal axis, an elongated metallic post is shaped with an outer cylindrical mounting surface at a first end and disposed in a coaxial aperture in the frame base, an annular shoulder is formed on the metallic post adjacent the outer mounting area, and this shoulder abuts a mounting area surrounding the coaxial base aperture. A jig is used to locate the post coaxially in the cup-shaped frame, with the post first end in the base aperture and the shoulder abutting the mounting area, and then a brazing liquid, such as silver solder, is flowed into the space between the post and the base and allowed to harden to secure the post in the frame. The post has a journal bearing aperture to provide a unit bearing for a rotor cooperating with the stator carried in the frame.

Abstract: An electrical motor has one or more capacitors inside the motor. Particularly, a half-pitch capacitor induction motor is shown, wherein the stator winding has a plurality of coils, one each on a tooth of the stator, and an auxiliary or capacitor winding includes a plurality of coils, one each on different ones of the teeth of the stator. The stator coils are spaced around the periphery of the stator such that spaces are provided between the coils, and one or more capacitors are provided in such spaces. These capacitors are mounted on an insulator board which provides physical mounting of the capacitors and also provides electrical connection to the capacitors to connect them all in parallel. The capacitors are then connected to the auxiliary winding. By this means, a small-sized motor without an elongated end bell permits mounting the capacitors inside the motor frame instead of outside in the usual cylindrical metal container.

Abstract: A unit bearing motor includes a frame member having opposite sides and a bearing post thereon, the bearing post having first and second opposite ends with first and second spaced bearing portions respectively extending axially inwardly from the ends. The bearing post has a first portion extending from one side of the frame member to the first end and a second portion extending from the other side of the frame member to the second end. The shaft of the machine is rotatably supported in the bearing portions and has a portion extending from the first end of the bearing post for supporting the rotor of the machine. A cup member is secured to the other side of the frame member and encloses the second portion of the bearing post to define a lubricant reservoir. The frame member has openings formed therethrough outwardly from the bearing post and communicating with the reservoir.

Abstract: A balanced, half-pitch capacitor induction motor having a stator core member with equally spaced teeth equal in number to twice the number of motor poles and with the inner ends of the teeth having equal angular extent, and a squirrel cage rotor member. The main field winding comprises serially connected coils equal in number to the number of motor poles respectively embracing alternate, consecutive ones of the teeth and being adapted to be connected across a single phase source of alternating current. An auxiliary field winding comprises serially connected coils embracing consecutive teeth intermediate the teeth having the main winding coils thereon, the auxiliary winding coils being serially connected with a phase-displacing capacitor across the serially connected main winding coils. The main and auxiliary windings have equal ampere turns and equal pitch thereby providing a balanced, half-pitch, two phase motor winding. The rotor member has its squirrel cage bars spiraled by one-tenth of a full turn, i.e.

Abstract: A fan blade is attached to the shaft of an induction motor by means of a spring clip seated in a groove in the shaft resiliently and frictionally clamping the fan blade against a flat surface of a member secured to the shaft, such as the rotor end ring, thereby providing a perpendicular relationship between the fan blade and shaft and, when the end ring is used, abstracting heat from the rotor.

Abstract: An electric motor having a rotor member and a stator member which define an air gap from about 0.001 inch to about 0.006 inch in width, the ratio of air gap width to rotor diameter being from about 0.0009 to about 0.005.

Abstract: A stator assembly for a two-pole, shaded pole motor which comprises a stator core member having four salient pole pieces each having a shank portion and a pole face portion. An opposite two of the poles have shading coils thereon, the other two poles being unshaded. A field coil is wound directly on the shank portion of each of the pole pieces, one pair of coils respectively on an adjacent two of the pole pieces being connected so that upon energization thereof, the two pole pieces are polarized in the same sense, the remaining pair of coils on the other two pole pieces being connected so that upon energization, the other two pole pieces are polarized in the opposite sense.

Abstract: A one-piece blank for a propeller fan having a plurality of substantially identical blade portions extending outwardly from a central hub portion, each of the blade portions having leading and trailing edges which are joined at outer leading and trailing corners to an outer peripheral edge. The leading and trailing edges of adjacent leg portions define a narrow radially extending slot and the leading edges are shorter than the trailing edges. Each peripheral edge has a trailing portion extending from the trailing corner which is generally arcuate and a leading portion smoothly joined to the trailing portion and extending to the leading corner which generally follows an involute curve.