Abstract: A one-piece, truncated conical annulus or dust separator body is molded from a high impact polystyrene material in such manner that a narrow rib is formed on the inner conical surface of the body to extend continuously in a spiral path from the larger to the smaller end thereof. A flange on its larger end is used to support the body in a vacuum cleaner chamber above a dust collecting canister. Dust-laden air enters the upper end of the body tangentially and cyclonically so that dust particles are urged outwardly by centrifugal forces, and are fed by the spiral rib downwardly into the canister.

Abstract: The bar includes two, elongate, rigid members connected together at one end of the bar by a pin and slot connection, and at the opposite end of the bar by a pivotal link, which supports one member for pivotal and translational movement relative to the other member between a retracted position in which the members and link are inclined to each other, and an extended position in which the two members and link are disposed in overlapping, parallel relation. At opposite ends of the bar the two members have pointed ends which are advanced one relative to the other to become imbedded in the confronting surfaces of a pair of adjacent ceiling joists, when the link is swung in a direction to advance the one member relative to the other. A bolt which extends between the two members can be employed to draw the one member into its advanced position relative to the other.

Abstract: A shading band for use in creating a shading pole in a shaded pole motor has tapered edges along its length, instead of the square cross-sectional edges with 90.degree. inside angles of the prior art, in order to increase the thickness of epoxy deposited thereon which insulates the winding slot within which the shading band extends. The shading band may be formed with a cross-sectional shape of many different geometries, as long as its cross-sectional shape does not include inside angles less than 90.degree.. The edge height for each shading band should be controlled in order to maintain an effective angle of transition from the wire slot sidewall tot he shading band of greater than about 90.degree..

Abstract: Two thermal protectors or thermostatic sitches are mounted on the outside of the housing of a combination ventilator/lamp unit to sense any heat build-up in the housing during operation of its lamp. One switch is normally open and is connected between the lamp and the motor for the ventilator fan; and the other switch, which is normally closed, is connected in series with the fan motor and lamp. The normally open switch is set to close automatically when the temperature in the housing reaches a first value above room temperature, thereby to energize the fan motor to cool down the housing. If the normally open switch and/or the fan motor fails the normally closed switch is set to open at a temperature above that at which the normally open switch closes, and functions as a safety switch to disconnect both the fan motor and lamp from the power supply.

Abstract: A two-piece, foldable ironing board is pivotally mounted at one end thereof for folding movement into and out of a cabinet, which is disposed to be mounted in a rectangular recess in the wall of a kitchen, or the like. The board is formed in two, separate sections which are hingedly connected together by a pair of double-acting hinges, which permit the two sections of the board to be folded between an operative position in which they lie in a substantially common, horizontal plane, or an inoperative position in which one section is folded back over the other. One section of the board is mounted for rotational movement about the axis of a lazy susan-type support, which is carried on the outer end of an ironing board support plate.

Abstract: The housing has therein two wire inlet/outlet openings overlapped by opposite ends of a removable, generally L-shaped knockout cover, which has in one end an access opening registering with one inlet/outlet opening, and in its opposite end a knockout plug which covers the other inlet/outlet opening, but which can be removed if both inlet/outlet openings are to be used. A wiring chamber is formed in the housing in communication with the inlet/outlet openings by a removable right-angular cover element which cooperates with the housing walls to form a chamber which is triangular in cross section.

Abstract: The assembly includes a grille, a lamp housing (reflector) containing a lamp socket, and a lens. These parts are releasably attachable to each other by a pair of flexible tabs which project upwardly from the lens at opposite sides thereof, and by a pair of rigid tabs which project upwardly from opposite sides of an external flange which surrounds the lower end of the reflector. The lamp housing extends upwardly through a central opening in the grille, and the flange on its lower end engages the underside of an internal flange formed on the grille around its central opening. The rigid tabs on the lamp housing overlie the flange on the grille to secure the housing to the grille, and the flexible tabs on the lens extend through registering notches in the housing and grille flanges, and have hook-shaped upper ends which overlie the grille flange releasably to secure the lens beneath the reflector.

Abstract: A generally annular heat sink is adapted to be compressed and inserted within the cylindrical sleeve of a motor or the like, with the spring action of the heat sink being sufficient to hold it in place after it is released. Channels along the outer surface of the heat sink provide reservoirs for a potting compound to further fix the heat sink and improve the thermal conductivity between the heat sink and sleeve. A PC board is mounted to the heat sink only through the electrical leads of power transistors to provide a limited amount of flexure to accommodate insertion and removal of the heat sink. In a second embodiment, a generally rectangular heat sink is mounted in a conduit box by tabs which are deformed to fit within channels along opposite edges of the heat sink. An access hole in the side of the conduit box and aligned with the channel permits a pin to be inserted therethrough to push the tabs out of the channel and release the heat sink and PC board from the conduit box.

Abstract: A self-aligning bearing and end shield mount for an electric motor or the like. The bearing mount has a spacer with a hub through which the rotor shaft extends and fingers that seat within an annular locating groove of the rotor shaft for securing the spacer to the shaft. The spacer also has a thrust surface. A spring has a hub portion through which the rotor shaft extends and a ring surrounding the hub with resilient arms therebetween. The spring also has a bearing seat and a thrust plate seat. A self-aligning bearing is seated in a bearing socket in the end shield of the motor housing and in the bearing seat of the spring. A thrust plate is seated within the thrust plate seat of the spring with the thrust surface of the spacer running against a surface portion of the thrust plate.The oil cap mount inlcudes circumferentially spaced protrusions extending out of the surface of the end shield and formed integrally therewith to define an oil cap seat.

Abstract: A multi-piece rotor for a dynamoelectric machine includes a core which is bore mounted to a shaft, and one or more annular sleeves which are slip fit and glued onto the shaft, the annular sleeves being characterized by a plurality of longitudinally extending ridges formed along the inner surface thereof, with one or more grooves cut in the inner surface between adjacent ridges such that as the sleeve is assembled to the core, the ridges contact the core and, if tightly fit to the core, the grooves provide adequate space for the insertion of adhesive.

Abstract: An electrical junction box for supporting a hanging load includes a base plate and a sidewall extending from it. The base plate has a pair of square bolts holes at opposite positions next to the sidewall. The sidewall has a pair of tabs bent inward, each tab having a bolt hole aligned with one of the square bolt holes. A square necked carriage bolt extends through each square bolt hole and its aligned tab bolt hole, with a lock nut on each of the bolts for supporting the hanging load. A spacer sleeve surrounds each of the bolts, between the base plate and the tabs, forming a rigid structure when the nuts are tightened. The sidewall further includes mounting holes for side mounting of the junction box for a supporting structure, permitting flush mounting of the box relative to a ceiling.

Abstract: A self-aligning bearing and end shield mount for an electric motor or the like. The bearing mount has a spacer with a hub through which the rotor shaft extends and fingers that seat within an annular locating groove of the rotor shaft for securing the spacer to the shaft. The spacer also has a thrust surface. A spring has a hub portion through which the rotor shaft extends and a ring surrounding the hub with resilient arms therebetween. The spring also has a bearing seat and a thrust plate seat. A self-aligning bearing is seated in a bearing socket in the end shield of the motor housing and in the bearing seat of the spring. A thrust plate is seated within the thrust plate seat of the spring with the thrust surface of the spacer running against a surface portion of the thrust plate.

Abstract: A combination heater-light-ventilator unit for mounting in a ceiling, is disclosed. A cylindrical housing supports the unit and an annular grille on its bottom includes an arcuate heat discharge outlet around part of its circumference and an arcuate air intake through the remainder, with a light diffuser supported in the center. The heat discharge outlet is configured to direct heat flow relatively straight down from the unit to minimize its recirculation through the arcuate air intake.

Abstract: An inlet wall mounted valve device for a central vacuum system is disclosed as having back and front plates arranged on either side of a wall to which the valve device is to be mounted. The back plate, composed of flexible metallic material, is adapted to be compressed and pushed through an opening in the wall having a smaller dimension than the width of the back plate so that the back plate will assume its normal relaxed condition behind the wall and extend beyond side edges of the opening. Fastening devices, such as screws, connecting the front plate to the back plate serve to draw each plate toward the other and thereby attach the valve device to the wall.

Abstract: An end shield for an electric motor or the like includes a generally disk shaped planar portion having a cylindrical bearing socket therein for mounting a cylindrical bearing. The socket has a cylindrical side wall and an end wall, and is formed from ears and tabs from the material of the disk such that the ears are bent out of the plane of the disk to extend at right angles to the planar portion. The ears define the cylindrical side wall of the socket. The tabs extend generally radially inwardly and define the end wall of the socket. A cylindrical bearing within the socket is retained radially and in axial alignment by the cylindrical side wall of the socket, and is restrained in an axial direction by the end wall of the socket. A spring may be mounted within the socket to resiliently preload the bearings of the motor in the axial direction.

Abstract: A housing for an electric motor includes a cylindrical sleeve and an end shield in the form of a circular disk that fits within the sleeve. The sleeve has tabs that extend inwardly and define stops to locate the end shield in one axial direction and position it perpendicular to the longitudinal axis of the sleeve. The end shield has circumferentially spaced recesses at the outer edge and in the outer surface thereof. The sleeve has protrusions that extend into the end shield recesses with the end shield positioned against the stops. The protrusions and recesses cooperate to locate the end shield in the other axial direction and secure it against rotational movement relative to the sleeve, whereby the end shield is firmly secured perpendicular to the longitudinal axis of the sleeve against both axial and rotational movement.

Abstract: This two-piece fuse comprises a generally rectangular plastic, dielectric housing, and a one-piece wire conductor. The conductor is folded into generally W-shaped configuration, and its inverted, V-shaped center section is inserted into a central recess in the bottom of the housing in such manner that its two, spaced, V-shaped legs are bent around the grooved, rounded ends of a pair of rigid web sections which project from the underside of the housing. Opposite ends of the folded wire are secured in a pair of spaced openings in the housing so that the two V-shaped legs of the wire are supported in a common plane by two web sections of the housing. The diameter of the wire is greater than the depth of the groove in each web section so that portions of the wire legs project out of the grooves for engagement with contacts when the leg sections of the wire are inserted into a cooperating female receptacle.

Abstract: A one-piece wire lead has intermediate its ends a thin, flattened section which is seated against a recessed die surface that is formed on one end wall of a hermetically sealed chamber in a preferably transparent, paraboloidally-shaped plastic housing. The two cylindrical leg sections of the lead project out of the opposite end of the chamber for connection in series with a conductor in a circuit that is to be protected. A plastic, electrically non-conductive, spring-loaded sabot is mounted to reciprocate in the chamber between a retracted position in which a sharp cutting edge on the forward end thereof faces one side of the flattened section of the lead, and an advanced position in which the sabot cutting edge has cut through the flattened lead section, and has extended into a recess in the die surface. Normally a compacted, granular thermal plug is cast or molded around either the sharp cutting edge of the sabot, or its operating spring, thereby normally to retain the sabot in its retracted position.