Abstract: Inorganic crystals having one or more species of dopant ions which are photo-reactive are used as visible and or infrared light optical limiters to protect against laser radiation exposure while permitting passage of the visible and or infrared light spectrum at least until exposed to high energy laser radiation. The dopant ions are selected from ions of transition metals. The exposure of these ions within the transparent crystalline matrix either photo-ionize or are elevated to an excited state and thereby absorb or otherwise attenuate the passage of the laser beam radiation sufficiently to protect human eyes or photo-sensitive equipment. The crystals may be fabricated into such items as lenses for use in eyeglasses or on shields of flight helmets to protect the eyes of aircraft pilots.

Abstract: A horizontal support member in the form of rod, pipe or tube is disposed transverse to and displaced from a rigid or utility pole proximate a messenger cable supporting a cable. The support member is supported on and a part of a projecting arm extending outwardly from a bracket attached to the utility pole. The support member is further provided with flanges on the ends thereof to prevent hooks on the end of a lineman's ladder from slipping off the ends of the support member. The support member is long enough not only to provide engagement for both hooks of the lineman's ladder but also could be extended so that the ladder hooks cannot slide off the support member as long as the hooks of the lineman's ladder are astraddle the projecting arm. The projecting arm is of sufficient length to position the top of the ladder below the front face of an electrical equipment cabinet which may be hung on and bolted to a pole bracket.

Abstract: A bowstring release with a fixed jaw and a single movable jaw is controlled by a trigger mechanism to provide enhanced accuracy. The bowstring release mechanism is adapted to rotate about its longitudinal axis to readily align the jaws with a bowstring, and the bowstring release is further attached to a wrist strap by means of a ring or attachment plate having two relatively straight sides engaged by leather tabs on the wrist strap. The straight sides and the leather tabs control and define the location of the ring thereby removing positional variances of the point of force transmission between the wrist strap and the bowstring release device and eliminate at least some variations which will affect consistent bowstring draw and release. The use of both a single fixed jaw and a movable jaw improves the accuracy and the smoothness with which the bowstring is released by stabilizing the bowstring during the initial portions of its flight after release.

Abstract: A low friction load/unload device for retracting a slider from or restoring a slider to the disk of a DASD (Disk Access Storage Device), having a ball bearing mounted on the load beam to engage an inclined surface with minimum frictional forces is disclosed. Whenever the inclined surface is part of a ring which rotates with the disk, the use of the ball bearing contact is highly advantageous since it substantially reduces and may eliminate those friction or stiction forces between the load/unload device and the ring member which would inhibit disk start up and disk rotation. The incorporation of the ball bearing into a tang for engagement with the inclined surface of the ring or ramp substantially reduces forces resisting operational forces generated both by the actuator motor and disk drive motor, thereby allowing smaller motor structures to be incorporated into reduced-size DASD units.