Abstract: A hand mounted keyboard, having a pair of opposed keypads for receiving the fingers of the mounting hand between, the opposed keypads operable by opposed movements of those fingers. The keyboard also has a thumb operated keypad mounted on the exterior of the keyboard. The characters and functions are grouped into generally task related modes or lanes. The lanes are divided into blocks, each block having two rows of data, each of the rows corresponding to one of the opposed keypads. The lanes are chosen by activating a first key with the thumb, and a second key with the finger. The thumb operated key is activated to chose a relationship for mapping between blocks of data in each lane and the finger operated keys. The mapping relationships assign characters and functions by row and column to opposed keypads and fingers respectively.

Abstract: A tool for aligning the strings of a racket, the tool having a base, a support bracket attached to the base for pivotally securing the racket to the base, a positioning pin for positioning the racket in a predetermined location on the base, and an array of spaced alignment pins projecting upward from the base for aligning the racket strings in predetermined positions.

Abstract: A holder for a compact digital disk. The holder includes a base having a hub on which a disk may be frictionally retained. It also includes a lid pivotally mounted on the base and having an extractor for disengaging the disk from the hub as the lid is moved from the closed to the open position. The extractor additionally functions as a latch to retain the lid in the closed position. Also, a deflector is positioned on top of the hub to retain the disk after it has been disengaged from the hub.

Abstract: A projector for creating a night-sky illusion on a planar surface such as a ceiling or a wall. The projector includes a base having two pairs of opposing walls and a shelf assembly adapted to be mounted in the base including a light bulb, a battery connected to the bulb, and a switch. It also includes a top adapted to be slidably mounted on the base and a transparency extending across an opening formed in the lid. The transparency is generally opaque, but includes a array of transparent dots fixed in predetermined positions. The disclosed method involves using the projector to produce an array of light spots resembling the night sky on a surface, applying luminescent paint to the spots and then exposing the painted spots to light energy, causing the paint to glow.

Abstract: A device for monitoring the physical characteristics of groundwater or other fluids. The sampling device includes a frame, a hanger for suspending the device from the wellhead, a service cable storage reel mounted for rotation on the frame, a handle for rotating the reel, a lock for preventing rotation of the reel with respect to the frame and a guide for directing the service cable from the reel into the wellhead. The device also may include a service cable which includes discharge hose and an electrical cable which are bonded together to function as a unitary cable and a cable block for sealing the lower end of the electrical cable to prevent the incursion of groundwater.

Abstract: A protective device for a padlock as typically used on the cargo doors of a trailer portion of a truck/trailer combination. Particularly, the device is intended to protect the lock from the environment and to provide a warning of unauthorized access. The preferred embodiment includes a base which is fastened to the door and surrounds the keeper of the lock assembly, a cover pivotally mounted to the base and enclosing the lock, a switch mounted to the cover for detecting displacement of the cover from its closed position and an audible alarm responsive to the switch for emitting a warning signal.

Abstract: A portable electrically powered toothbrush which includes a brush head having at least one tuft holding assembly mounted for rotation about its central axis. Pulsating direct current is supplied through control circuitry to a DC motor in the brush handles by a pair of rechargeable batteries also mounted in the handle. Power from the motor is transmitted through a reduction gear and belt drive assembly to the tuft holding assembly, resulting in a unidirectional intermittent rotation of the assembly about its axis and a simultaneous reciprocation of the assembly along that axis. Alternately, continuous power may be supplied to the motor, resulting in a unidirectional continuous rotation and reciprocation of the tuft holding assembly.

Abstract: A submersible sensor for use in monitoring the physical properties of well water or other fluids. The sensor includes a thin walled cylindrical body having a pair of opposing entrances, each of which has been machined to form a stepped counterbore. The sensor also includes a seal cone adapted to be inserted in either entrance and a seal disposed between the seal cone and the inner step of the counterbore.

Abstract: A clamp for sealing leaks occurring between a pipe and a pipe fitting. The clamp is usable with common tee, straight, reducer, and 90.degree. elbow fittings and with various combinations of simple adapters can be used with at least two standard sizes of any such fittings. Two of the disclosed embodiments are particularly useful with flanged gate valves.