Abstract: A contaminant-resistant motor may include an endbell with hermetic sealing of control components within a control module cavity in the endbell. The endbell configuration includes a front wall that isolates the control module cavity from contaminant-prone area of the motor assembly. The stator leads may be sealed within the lead passages using glass or other seals to further isolate the stator leads and control module cavity against ingress of contaminating liquids from the motor interior. The endbell configuration permits larger bearing elements to be used. A method of assembly of the motor may involve first fixture to align the stator, housing and REB to ensure concentric alignment of the stator to housing and the REB to the housing and a second fixture to isolate front and rear bearing bores and the stator inner diameter from encapsulation material and permit the stator to be molded to the housing.

Abstract: An infinitely variable multi-directional linear motion solenoid actuator (10) for use on printed circuit boards (12). The solenoid actuator includes wire coils (14) wound onto a bobbin (16) and a moveable magnetic armature (18) passing through a central bore (20) of the body. The armature is responsive to current passing through the coils to produce infinitely variable and reversible motion. Support posts (22) passing through the bobbin are used for electrical connection between the coils and the circuit board, as well as for mounting the actuator to the circuit board. The support posts may have solder heads on one end for surface mounting to the board, and may have plain heads on an opposed end for alternative through-hole mounting. A vacuum pick area (56) may be formed on one or both sides of the bobbin body to facilitate automated handling of the actuator.

Abstract: An electric braking or clutching device includes a housing; an armature having an axis and disposed at the housing, the armature and the housing defining a radial air gap therebetween; and a coil configured to generate, when energized, a magnetic field at the housing and armature, a flux path of the field extending from the coil into the housing, from the housing into the armature, from the armature into the housing, and from the housing back to the coil, with the direction of the flux path from the armature into the housing being substantially radial in orientation.

Abstract: A permanent magnet activated wrap spring clutch (10). A coil spring (32) surrounds an input hub (14) and an output hub (22) and is selectively engaged to wrap down upon the hubs for the transmittal of torque. In an unpowered, engaged condition of the clutch, a permanent magnet (40) attracts a control collar (38) attached to the spring into frictional engagement with a rotating input element (20). Rotation of the control collar causes the spring to wrap down from its somewhat oversized diameter at rest to grip the hubs. In a powered, disengaged condition of the clutch, an energized coil (44) causes the magnetic field of the permanent magnet to move away from the control collar, thereby removing the frictional engagement and allowing the spring to unwrap. The clutch provides torque transmittal without electrical power and ensures complete disengagement regardless of a low momentum or high drag on the output.

Abstract: An electric braking or clutching device includes a housing; an armature having an axis and disposed at the housing, the armature and the housing defining a radial air gap therebetween; and a coil configured to generate, when energized, a magnetic field at the housing and armature, a flux path of the field extending from the coil into the armature, from the armature into the housing, and from the housing back to the coil, with the direction of the flux path from the armature into the housing being substantially radial in orientation.

Abstract: A surface mountable electronic device comprising a body incorporating an electronic device and having a substantially planar mounting surface and another surface extending from the mounting surface, at least one electrical lead extending from the device, and a terminal of conductive material having a first portion fixedly received in the body and extending through the other surface, a second portion extending from the first portion and electrically connected to the lead and a third portion extending along the mounting surface for providing electrical connection to a circuit. A recess preferably is provided in the other surface of the body for receiving the first portion of the terminal.

Abstract: A brushless resolver comprising a housing, a rotor rotatably mounted in the housing, a rotary transformer comprising a primary winding carried by the housing and secondary winding on the rotor and operatively associated with the primary winding, a resolver comprising a stator winding carried by the housing and a rotor winding on the rotor and operatively associated with the stator winding, characterized by an electromagnetic flux absorber in the housing between the rotary transformer and the resolver for absorbing leakage electromagnetic flux from the rotary transformer so as to reduce any deviation between the indicated electrical position of the rotor and the actual mechanical position of the rotor during each revolution of the rotor. The flux absorber comprises a copper ring between the rotary transformer primary winding and the resolver stator winding so that the leakage flux creates eddy currents in the ring thereby absorbing or reducing the leakage flux.

Abstract: A heat exchanger comprising a precooler and reheater core adjacent a chiller core, first heat transfer passages extending through both cores through which incoming air passes in a first direction, second heat transfer passages extending through the chiller core through which coolant passes in heat exchange relationship with incoming air and perpendicular to the first direction, and third heat transfer passages extending through the precooler and reheater core through which cooled air from the chiller core passes in heat exchange relationship with the incoming air and perpendicular to the first direction. A manifold contiguous with both cores conducts chilled air from the chiller core to the third set of heat transfer passages.Incoming air is chilled in the chiller core and thereafter exchanges heat with the incoming air in the precooler and reheater core to precool the incoming air to form water droplets and to raise the temperature of the chilled air to a usable temperature.

Abstract: A surface mountable electronic device comprising a body incorporating an electronic device and having a substantially planar mounting surface and another surface extending from the mounting surface, at least one electrical lead extending from the device, and a terminal of conductive material having a first portion fixedly received in the body and extending through the other surface, a second portion extending from the first portion and electrically connected to the lead and a third portion extending along the mounting surface for providing electrical connection to a circuit. A recess preferably is provided in the other surface of the body for receiving the first portion of the terminal.

Abstract: A heat exchanger comprising a precooler and reheater core adjacent a chiller core, first heat transfer passages extending through both cores through which incoming air passes in a first direction, second heat transfer passages extending through the chiller core through which coolant passes in heat exchange relationship with incoming air and perpendicular to the first direction, and third heat transfer passages extending through the precooler and reheater core through which cooled air from the chiller core passes in heat exchange relationship with the incoming air and perpendicular to the first direction. A conduit conducts chilled air from the chiller core to the third set of heat transfer passages.Incoming air is chilled in the chiller core and thereafter exchanges heat with the incoming air in the precooler and reheater core to precool the incoming air to form water droplets and to raise the temperature of the chilled air to a usable temperature.

Abstract: A brushless d.c. motor comprising a housing, an annular stator coil structure with the housing, a rotor concentric with the stator and comprising a body having an output shaft portion extending from one end thereof toward the forward end of the housing for connection to a mechanical load for driving the same and a permanent magnet arrangement on the periphery of the rotor body operatively associated with the stator coil structure, a first bearing near the forward end of the housing for rotatably supporting the shaft portion of the rotor and wherein there is provided a second bearing axially inwardly of the rear end of the rotor for rotatably supporting that end of the rotor and a circuit board located between the rear end of the rotor and the rear end of the housing. By virtue of the location of the second bearing a rigid and vibration free structure is provided for operation of the motor at high speed.

Abstract: A surface mountable electronic device and method of making same wherein a discrete electronic device is encapsulated in a body of electrical insulating material having opposite ends and a mounting surface extending between the ends, and an electrode is provided on each end. Each electrode includes a portion on the end of the body in electrical contact with the corresponding lead of the discrete electronic device and a contact portion extending along the mounting surface for making electrical connection to a circuit portion defined on a surface to which the device is mountable. The discrete electronic device is manufactured, prior to encapsulation, by known techniques. Preferably the body is a rectangular solid with each of the four sides having electrode contact portions thereon to serve as one of four possible mounting surfaces each with substantial mechanical stability.

Abstract: A method of making a surface mountable electronic device comprising the steps of providing a discrete electronic device comprising a body and a pair of spaced apart leads each of substantially circular cross-section and extending axially outwardly from the body in generally opposite directions, shaping each of the leads to provide a plate-like section in each of the leads at a location axially outwardly from the body, encapsulating the device body in electrical insulating material in a manner shaping the material to provide a body having first and second spaced apart ends and a mounting surface extending between the ends, the plate-like sections of the leads extending from the ends, and shaping each of the plate-like sections of the leads to have a contact portion extending along the mounting surface for making electrical connection to a circuit having a portion defined on a surface to which the device is mountable.

Abstract: A surface mountable electronic device and method of making same wherein a discrete electronic device is encapsulated in a body of electrical insulating material having opposite ends and mounting surface extending between the ends, and an electrode is provided on each end. Each electrode includes a portion on the end of the body in electrical contact with the corresponding lead of the discrete electronic device and a contact portion extending along the mounting surface for making electrical connection to a circuit portion defined on a surface to which the device is mountable. The discrete electronic device is manufactured, prior to encapsulation, by known techniques. Preferably the body is a rectangular solid with each of the four sides having electrode contact portions thereon to serve as one of four possible mounting surfaces each with substantial mechanical stability.

Abstract: Surface mount networks and methods of making. One form of a network is a single in-line network. According to one method all components are mounted within a bar stock of generally rectangular cross section, the components have end caps disposed over a cylindrical body portion, which body portion is received within grooves on the bar stock material, and the end caps extending to the sides of the bar stock. A portion each of the end caps lies in a plane to one side of the bar stock so that the network can be mounted on the conductive traces of a printed circuit board. The single in-line network may also be molded to its final configuration. In another form two in-line networks are provided with a bus between adjacent end caps, a portion of the cylindrical wall surface of the end caps lying in a common plane on the periphery of the network and being adapted to be surface mounted onto the conductive traces of a printed circuit board.

Abstract: A heat exchanger having a cylindrical shell divided into upper and lower chambers. A tube bundle may be disposed within the lower chamber, the tube bundle having spaced apart inlet and outlet sides which can be disposed either to one side or the other thereby permitting greater placement of the inlet and outlet ports on the shell. To this end the structure which divides the shell into upper and lower chambers includes a generally horizontal longitudinally extending plate assembly provided with openings to either side of a vertically extending barrier wall used for controlling the flow of air. Longitudinally extending guide bars are secured to the lower surface of the horizontal plate. The tube bundle includes upper and lower longitudinally extending shrouds, each of which is provided with a mounting bracket which extends away from the shroud along a longitudinally extending vertical plane which bisects the center of gravity of the tube bundle.

Abstract: A heat exchanger having an outer shell with an elongated, semi-circular fluid duct plate mounted in the shell. A tube bundle slidable between the duct plate and the shell is fixed at one end relative to the shell. The fluid inlet and outlet configuration, and transverse fluid flow pattern, are typical of those described in U.S. Pat. No. 3,532,160. The exterior of the tube bundle is partially covered with a shrouding to contain the fluid flow within the tube bundle by allowing the fluid to exit only through the outlet side. Sealing mechanisms running longitudinally between the shrouding and the upper duct plate, and between the shrouding and the shell, provide a seal which restricts the fluid flow to a transverse flow through the tube bundle. A seal between the supported end of the tube bundle and the shrouding confines the fluid flow in the bundle and allows for relative expansion of the shrouding and the bundle.

Abstract: A method and apparatus for separating particulate matter from a gas stream wherein dirty gas is moved first through a corona discharge zone, such as that provided by a plurality of rod-like electrodes each having a sharp-edged corona producing ribbon-like formation extending axially therealong, and then is moved through a plurality of mechanical filters of the cartridge type, each comprising a perforated, cylindrical, metal outer shell and an inner filter medium of foraminous dielectric material such as pleated paper. Each cartridge is closed at one end and open at the other from which cleaned gas flows out axially. The electrodes are located circumferentially of the filters with the filter and electrode longitudinal axes being substantially parallel.

Abstract: The invention relates to a method of fastening electrical wire leads to each end of a ferromagnetic sleeve or core form in a manner whereby significantly greater bonding strength is provided between the leads and the core as compared to prior art methods. The core and wire leads are placed in a molding cavity into which molding material is injected so as to affirmatively fill the clearance between the lead ends and the core thereby resulting in a highly effective cementing of one to the other. The core body is hollow so that the molding material passes through each end to completely fill the central portion of the core. In this manner the central bore through the core body provides effective gating to the injected molding material. The ferromagnetic coil article so formed includes a molded flange on each of its ends which extend radially outward from the outer surface of the core body associated therewith.

Abstract: The invention relates to a method of fastening electrical wire leads to each end of a ferromagnetic sleeve or core form in a manner whereby significantly greater bonding strength is provided between the leads and the core as compared to prior art methods. The core and wire leads are placed in a molding cavity into which molding material is injected so as to affirmatively fill the clearance between the lead ends and the core thereby resulting in a highly effective cementing of one to the other. The core body is hollow so that the molding material passes through each end to completely fill the central portion of the core. In this manner the central bore through the core body provides effective gating to the injected molding material. The ferromagnetic coil article so formed includes a molded flange on each of its ends which extend radially outward from the outer surface of the core body associated therewith.