Abstract: A device and method for securing objects of almost any sizes and shapes to a wall is disclosed. A hanger comprising a length of cord suitable for the size of object to be hung, a hook shaped block with screw mounting holes, a thru hole, perpendicular and slightly below to the mounting holes for passing the length of cord, and a slot parallel to the thru hole . The thru hole and the slot should be of the same size, slightly larger than diameter of the cord. The block is mounted to a wall by screws or other means such as double sided tape, rail mount system, peg board hook etc. The cord of suitable length for the object is inserted into the thru hole and knotted on both end. With one of the knot resting against one side of the device, the rest of the cord is then looped on the object to be hung and then inserted into the slot, letting the other knot resting against the other side of the device.

Abstract: Box shaped device for joining cylindrical rods and flat panels having multiple orthogonal holes on three axis allows quick joint of two or more rods or panels or combination thereof in two or three axis. The holes are threaded to allow screws to lock the rods or panels in position. The rods being slightly smaller than the size of the holes, can be inserted thru the holes and locked at any position, allowing flexibility to construct any frame structure of any size, and do not require rods or panels with specially shaped attachment points. Special purpose blocks can be made with holes at different angles or special shapes for mounting panels etc.

Abstract: A device and method for attenuating a low-level light source over a very wide dynamic range is disclosed. The device comprises a light source, a plurality of fiber optic means, a plurality of opaque tubes, and a specifically designed block with a light tight chamber and a plurality of output apertures connected to the chamber through drilled tunnels. The fiber optic means are inserted into the tunnels connecting the light tight chamber and the output apertures, so the end of the fiber optic means are visible through the output apertures, while the long part of the fiber optic means are exposed to the light source in the chamber. The opaque tubes are inserted over the fiber optic means to control the amount of light allowed to hit the fiber optic means. The amount of light collected by the fiber optic means can be adjusted by moving the opaque tube sleeve so as to cover part of the fiber optic means.

Abstract: A device and method for the detection of light emitted by chemically reactive substances is disclosed. The device comprises a plurality of wells for holding chemically reactive substances, a detector for detecting light emitted by the chemically reactive substances held in each well, and a moving component for moving the detector sequentially to each respective one of a series of detection positions, proximate to each well, so as to enable the detector to detect the light emitted by the chemically reactive substance in each well. The detector employed in the present invention comprises a photomultiplier tube and, in accordance with the invention, a processor is employed to control the gain of the photomultiplier tube.