Abstract: A method of defining a new pinion for use with a given face gear set. Tooth geometry of the new pinion is generated by a plane taking the given face gear set as reference and maintaining true conjugate actions among the original pinion, the face gear, the new pinion and the generating plane. This method makes it possible to eliminate adapter gears for applications requiring different shaft settings and/or ratios than those of the given gear set.

Abstract: A multidirectional switch (1) comprises an insulative housing (2), a first fixed contact (31) and a third fixed contact (33), a first moveable contact (41) and a second moveable (42) contact disposed above the first fixed contact (31) and the third fixed contact (33), an operation member (5) mounted on the first moveable contact (41) and defining a second pressing portion (53). The second pressing portion (53) presses the second moveable contact (42) in order to make the second moveable contact (42) contact with or separate from the third fixed contact (33). The first moveable contact (41) always contacts with the first fixed contact (31). The second moveable contact (42) is integrated with the first moveable contact (41) and distributed around the first moveable contact (41).

Abstract: An electrical switch includes an insulative housing (10), a set of fixed contacts fastened in the housing, a movable contacts (30) received in the housing, a load plate (40) mounted above the movable contact, a spring (50) mounted in the load plate, a driver (60) defined on the load plate, a shell (70) surrounding the housing, a knob (80) assembled with the load plate, and a push button (90) assembled on the load plate. While rotating the knob, the load plate is accordingly rotated, and the movable contacts are driven to contact with some of the fixed contacts, which enables rotary operation. While pressing the push button, the driver is pressed to move downwardly to press the movable contacts for contacting with the fixed contacts, which enables pushing operation.

Abstract: An electrical switch includes an insulative housing (10), a set of fixed contacts fastened in the housing, a movable contacts (30) received in the housing, a load plate (40) mounted above the movable contact, a spring (50) mounted in the load plate, a driver (60) defined on the load plate, a shell (70) surrounding the housing, a knob (80) assembled with the load plate, and a push button (90) assembled on the load plate. While rotating the knob, the load plate is accordingly rotated, and the movable contacts are driven to contact with some of the fixed contacts, which enables rotary operation. While pressing the push button, the driver is pressed to move downwardly to press the movable contacts for contacting with the fixed contacts, which enables pushing operation.

Abstract: A method for dressing a grinding worm that is to be used in forming a conical face gear that meshingly engages a conical involute pinion. The method employs true conjugate action between a theoretical conical involute pinion and a conical face gear to accurately position a dressing tool relative to a grinding worm.

Abstract: An electrical connector (1) for electrically connecting a central processing unit (CPU) with a printed circuit board (PCB) (5) includes an insulative base (2), a cover (3), and a cam actuator (4) for actuating the cover to slide along the base. The base includes a thick first portion (21), and a thin second portion (22) defining a plurality of receiving holes (223) receiving corresponding electrical terminals (224) therein. Each terminal has a solder ball (222) fused on one end thereof. The first portion has a mounting surface (212), and defines a recess (211) at a middle of the mounting surface to provide an additional path for heating airflow to reach the solder balls when the connector is soldered to the PCB. This helps ensure that every solder ball is adequately and uniformly heated, so that all the solder balls are accurately fused with the PCB at one time.

Abstract: A method for dressing a grinding worm that is to be used in forming a conical face gear that meshingly engages a conical involute pinion. The method employs true conjugate action between a theoretical conical involute pinion and a conical face gear to accurately position a dressing tool relative to a grinding worm.

Abstract: A tool and method for dressing a grinding worm that is to be used in forming a conical face gear that meshingly engages a conical involute pinion. The method employs a theoretical conical involute pinion as a reference to orient a dressing tool relative to the grinding worm at an initial position. A plurality of straight generators that define a reference tooth on the theoretical conical involute pinion and the concept of true conjugate action between the theoretical conical involute pinion, the grinding worm and the dressing tool are employed to define a plurality of dressing tool paths which are employed to position and move the dressing tool to form the teeth in the grinding worm. A method for grinding a conical face gear and a tool for dressing a grinding worm and forming a conical face gear are also provided.

Abstract: A tool and method for dressing a grinding worm that is to be used in forming a conical face gear that meshingly engages a conical involute pinion. The method employs a theoretical conical involute pinion as a reference to orient a dressing tool relative to the grinding worm at an initial position. A plurality of straight generators that define a reference tooth on the theoretical conical involute pinion and the concept of true conjugate action between the theoretical conical involute pinion, the grinding worm and the dressing tool are employed to define a plurality of dressing tool paths which are employed to position and move the dressing tool to form the teeth in the grinding worm. A method for grinding a conical face gear and a tool for dressing a grinding worm and forming a conical face gear are also provided.

Abstract: A face-gear forging die which can be used to near-net forge face gears is disclosed. The face-gear forging die is constructed from a blank, and is cut to specification using a wire electrical discharge machining (EDM) process. The wire electrical discharge machining process is computer controlled, according to pre-specified instructions. Accordingly, a variety of different-shaped face-gear forging die may be constructed by merely changing the specification's input to the wire Electric Discharge Machining apparatus. The wire Electric Discharge Machining process can also be used to cut the face gear tooth directly, to thereby circumvent the forging procedure. The complex, curved surfaces of the face gear teeth are mathematically approximated with a ruled surface, and the mathematical approximation is input to the wire Electric Discharge Machining apparatus for subsequent execution and forming of the die.

Abstract: The present invention is directed to a unique gear set including a conical involute pinion and a mating face gear. The mating face gear has an axis whose location and orientation is usually configured, as intersecting with or slightly offset from the pinion axis. The pinion teeth are formed as involute helicoids generated from a base cylinder. The mating face gear teeth are defined by the shape of the mating conical pinion teeth surface at that time when the two mating gears are specifically positioned so as to perform synchronous rotations about their respective axes of rotation. This arrangement allows the gears to mesh and transmit high torque at high speeds through an angle as required in helicopter transmissions and the like.

Abstract: A precision grinding apparatus includes a grinding worm for precision grinding a case-hardened face gear. A shaper is first placed into contact with a face gear, to thereby shape a surface of the face gear into a plurality of face gear teeth. The shaper is then removed, and the face gear is case hardened. The grinding worm is disposed in a normal orientation to the case-hardened face gear and includes a spiral tooth extending along a perimeter of the grinding worm. The spiral tooth of the grinding worm is adapted to contact and precision grind the case-hardened gear. A dressing tool includes a protrusion for contacting the spiral tooth of the grinding worm, as the spiral tooth contacts and precision grinds the case-hardened face gear. The dressing tool thus maintains the shape of the grinding worm to within a desired tolerance range.