Abstract: A sighting device is mountable to the side plate of a gun. The sighting device includes a light source (preferably a laser), a power source connectable to the light source. The sighting device is mounted to a gun, usually by being mounted to a side plate, which is then mounted to a gun. In one embodiment, the sighting device is mounted to the side plate by being screwed or bolted to it. In another embodiment, the sighting device includes a recess or channel that receives a rail, such as a dove-tail projection (or protrusion), formed on the side or vice versa. A side plate to which the sighting device can be attached and a gun including the sighting device are also disclosed.

Abstract: A sighting device is mountable to a gun. The device includes a light source (preferably a laser), a power source connectable to the light source and a mount attachable to the gun so that the laser is juxtaposed either the top surface of the gun or a side surface of the gun. In one embodiment, the sighting device includes a bottom rail mountable in a slot on the gun, wherein the slot is preferably positioned on the top surface of the gun. The sighting device may also include a mechanical sight that functions as the rear mechanical sight on the gun and/or a secondary light source.

Abstract: A cover for an optical instrument or device includes a preferably flexible hood for partially covering and alternately uncovering the optical instrument and a connector attached to the hood for securing the hood to the optical instrument while the instrument or device is uncovered.

Abstract: A firearm having a laser beam capacity for aiding in sighting positioned within the firearm for adjustment therein and having an on-off switch operated by the firearm operator's trigger finger of the trigger finger hand is in position on the firearm grip. The switch can be assembled for operation by finger pressure from a selected side of the firearm.

Abstract: A method for modifiying a liquid assay reagent to provide prolonged homogeneity thereof, particularly where the liquid assay reagent comprises microparticles for performing a heterogeneous immunoassay, is provided wherein the addition of an inert material to a liquid assay reagent achieves neutral density to thereby prolong the homogeneity thereof for extended periods of time. A method for the automated agitation of assay reagents to maintain the homogeneity thereof with an automated, continuous and random access analytical instrument is also provided. The automated mixing is accomplished by a back and forth motion of a carousel onto which assay reagent containers or packs are mounted with asymmetric pauses which can be completed within a short period of time. The carousel acceleration, velocity, distance moved, and pause-asymmetry are optimized to provide rapid assay reagent resuspension without foaming or bubble formation.

Abstract: A firearm having a laser beam capacity for aiding in sighting positioned within the firearm for adjustment therein and having an on-off switch operated by the firearm operator's trigger finger of the trigger finger hand is in position on the firearm grip. The switch can be assembled for operation by finger pressure from a selected side of the firearm.

Abstract: A plastic assay cuvette having the desired optical properties for the analysis of a test sample or reaction mixture thereof, and a method for making such plastic assay cuvette, are described. The optical properties of the plastic assay cuvette are substantially the same as the optical properties of glass wherein low birefringence throughout the optical read region thereof is provided. When used for the analysis of a test sample or reaction mixture thereof, such as in fluorescence polarization assays and absorbance assays, the plastic assay cuvette provides accurate and reproducible results while, at the same time, provides a low-cost disposable assay cuvette which can be used in place of conventional glass assay cuvettes.

Abstract: A device for back washing and the like including a guide assembly with a front panel having a zigzag slot therethrough comprising a plurality of interconnected, alternating, sloped runs. A traveler assembly is mounted on the guide assembly and is movable along the runs. The traveler assembly includes a mounting block with a guide pin extending therefrom and having a retainer attached thereto for retaining the guide pin slidably positioned within the slot. A pad or brush is detachably mounted on the mounting block for engagement by a person simultaneously with the traveler assembly moving on the guide assembly.