Abstract: A trackball supporting device includes a plurality of trackball supports respectively installed in holes around a base to support a trackball on a trackball seat on the base, each trackball support including a front socket, a rolling ball revolvably retained in the respective front socket to support the trackball in the trackball seat, and a lubricating device to lubricate the respective rolling ball, each mounting hole having symmetrical hooks with raised portions clamped on the respective trackball support to hold it in position.

Abstract: A computer keyboard includes two symmetrical parts, each consisted of a bottom shell supported on a common base plate above a common bottom plate, and a top shell supported on the respective bottom shell, wherein the bottom shell has inverted T-rods made to slide in respective arched slots on the base plate, a locating block made to slide in a guide groove on the base plate; the base plate has a spring stop strip terminated to a projecting potion engaged into a serrated side wall of the locating block of the bottom shell; a lifting mechanism is connected between the top and bottom shells and controlled to turn the top shell on mounting lugs on the bottom shell permitting the top shell to be moved from a horizontal position to a sloping position or from the sloping position to the horizontal position.

Abstract: An encoder with a light emitted editing wheel comprises an editing wheel defines a wheel body and a hole in its middle portion. The editing wheel is made from transparent material, such glass, acrylic etc. The editing wheel is mounted on a shaft member and can be actuated to rotate thereon via suitable actuating means. A plurality of light focusing means being disposed along the circumference of the editing wheel. A light receiving means is provided radially on the wheel body. The light focusing means is interconnected with the light receiving means and capable of focusing a light source transmitted from the light receiving means into a plurality of light point. A light source is disposed at a perpendicular position above the editing wheel. The light source is capable of sending a light to the light receiving means of the editing wheel. And a sensor means is disposed adjacent to the light focusing means. A pair of light detecting means are provided at the sensor means thereon.

Abstract: Disclosed is a scan control system for controlling the scanning operation of a business card reader. The scan control system is consisted of a document sensor detector, a delay time circuit, a motor start drive, a motor drive counter, a start scan monitor, an error detector circuit, an end of scan circuit, an encoder control circuit and a divide frequency circuit, and connected to a computer for document filing, in particular business card filing.

Abstract: A computer keyboard includes two symmetrical parts, each consisted of a bottom shell supported on a common base plate above a common bottom plate, and a top shell supported on the respective bottom shell, wherein the bottom shell has inverted T-rods made to slide in respective arched slots on the base plate, a locating block made to slide in a guide groove on the base plate; the base plate has a spring stop strip terminated to a projecting potion engaged into a serrated side wall of the locating block of the bottom shell; a lifting mechanism is connected between the top and bottom shells and controlled to turn the top shell on mounting lugs on the bottom shell permitting the top shell to be moved from a horizontal position to a sloping position or from the sloping position to the horizontal position.

Abstract: Disclosed is a key switch formed by molding a silicone rubber key base to a rubber key body, wherein the rubber key body has a neck portion in the middle and a center recess on a bottom surface thereof for bonding the silicone rubber key base through a low-pressure, low-temperature molding process; the silicone rubber key base has a short plunger supported within a circular sloping wall portion at a higher elevation for touch control and quick return.

Abstract: A key switch includes a switching member supported on a resilient member and connected to a key cap and driven by it to slide in a locating member. The switching member has two opposite, curved side plates caused to slide in the locating member along two opposite sliding ways. The elastic member has a plurality of small raised portions supported on the PC board, a plurality of spaced ribs on the inner wall surface to reinforce the structure and the elastic resilient property thereof, and a plurality of notches between the raised portions for exhaust of air squeezed by the circular flange of said switching member.

Abstract: A scanner is disclosed having spring pressers pressed over the axles of a document guide roller assembly of a transmission mechanism thereof at two opposite ends in holding down the document guide roller assembly for delivering the document inserted therein for smooth scanning and preventing the document from being biased.

Abstract: A key switch includes a rectangular key cap having a unitary, hollow, rectangular plunger inserted into a rectangular hole on a key base and pressed to squeeze a rubber tone causing a conductor to electrically connect a contact on the printed circuit board of a keyboard, wherein the rectangular plunger has four circular rails on the four corners thereof along its length respectively inserted in four circular grooves on the rectangular guide slot of the key base for stable movement, and two smoothly curved, hooked spring plates releasably hooked with two opposite hooked portions on the key base for positioning.

Abstract: A notebook computer CMOS firmware processing method and the related hardware for saving power consumption by means of the application of the internal functions of CMOS and the processing of CMOS firmware permitting keyboard to enter idle mode or power down mode when CPU is temporarily stopped from execution, or to wake up when any key is pressed or any command is sent from the system to the keyboard.

Abstract: A color separation system is disclosed consisted of a mounting frame, a color filter assembly, and a step motor controlled to move the color filter assembly back and forth in a channel. The color filter assembly is consisted of a filter holder frame, a cover frame fastened to the filter holder frame through doweled joints, a series of color filter lenses retained in windows between the filter holder frame and the cover frame, a rack meshed with a gear on the output shaft of the step motor, and top and bottom projecting rods respectively inserted in top and bottom guide slots on the mounting frame.