Abstract: Training equipment includes a hollow shaft having a sidewall defining an internal cavity and at least one polymer material filling at least a portion of the internal cavity. The polymer material may fill the entire internal cavity of the hollow shaft. The polymer material may be a visco-elastic polymer material or polyurethane. A spacer or a filler may fill at least a portion of the internal cavity. A method of making weighted training equipment with a hollow shaft having a sidewall defining an internal cavity may include injecting a curable composition into at least a portion of the internal cavity. The method may further include curing the curable composition into a polymer material.

Abstract: Training equipment includes a hollow shaft having a sidewall defining an internal cavity and at least one polymer material filling at least a portion of the internal cavity. The polymer material may fill the entire internal cavity of the hollow shaft. The polymer material may be a visco-elastic polymer material or polyurethane. A spacer or a filler may fill at least a portion of the internal cavity. A method of making weighted training equipment with a hollow shaft having a sidewall defining an internal cavity may include injecting a curable composition into at least a portion of the internal cavity. The method may further include curing the curable composition into a polymer material.

Abstract: Training equipment includes a hollow shaft having a sidewall defining an internal cavity and at least one polymer material filling at least a portion of the internal cavity. The polymer material may fill the entire internal cavity of the hollow shaft. The polymer material may be a visco-elastic polymer material or polyurethane. A spacer or a filler may fill at least a portion of the internal cavity. A method of making weighted training equipment with a hollow shaft having a sidewall defining an internal cavity may include injecting a curable composition into at least a portion of the internal cavity. The method may further include curing the curable composition into a polymer material.

Abstract: Methods and compositions are provided for preventing and treating neurological disorders, in particular Parkinson's disease.

Abstract: This invention relates to the field of chemical sensing and signal transduction using devices that are sensitive to single molecular species or closely related families of species. In one aspect, the present invention relates to systems that are designed to detect target molecules in the gas phase, as well as more condensed phases, in the presence of heterogeneous populations of molecular species.

Abstract: A retractable roller system has a main channel mounted on the floor of a vehicle into which cargo is to be loaded. A pneumatically actuated bladder is mounted along the bottom of the channel and a roller tray on which a plurality of roller members are rotatably supported is mounted in the channel above the bladder. Flange members extend inwardly from the side walls of the channel at different vertical levels. Flange members extend outwardly at different vertical levels from the opposing side walls of the roller tray. The rollers are raised to handle the loading of cargo by inflating the bladder and lowered to recess the rollers below the level of a cover plate to keep the cargo in a desired location. The cover plate utilizes a minimum number of screws in conjunction with a mating coupler plate and slots and for adjacent units which engage pins on the channel to provide secure retention of the plate yet facilitating ready removal when the roller tray needs to be removed for repair or replacement.

Abstract: A beam assembly is formed from a hollow beam member which has a pair of slidable channel units installed therein and extend from the opposite ends thereof. The ends of the channel units have guide shoes forming latching assemblies pivotally supported thereon, each guide shoe having a spring loaded lock key mounted pivotally mounted thereon. A pair of tracks are spaced from each other in opposing relationship by a distance equal to the longitudinal extent of the beam member. The tracks have a plurality of aligned apertures and C-shaped runners running along their longitudinal extent. The lock keys of the beam member each has a pair of fingers extending therefrom which fit into a pair of adjacent track apertures. The fingers may be locked in place in the opposing track apertures by the spring action of their associated springs and may be withdrawn from the apertures by way of a tab formed thereon.

Abstract: In accordance with illustrative embodiments of the present invention, a safety bypass switch for use with explosive well tools includes a hollow conductive body having a copper conductor rod extending axially therethrough, a spring-loaded contact element movable transversely in the body between a first position where a surface of the element engages the rod to provide a solid short between the rod and the body, and a second position where such surface is out of engagement with the rod, and a diaphragm or piston for operating the contact element in a manner such that a predetermined hydrostatic pressure in the well bore will shift the contact element to the second position. The springs which bias the element toward the first position are mounted internally and externally of the body. In another embodiment of the invention a manually operated grounding switch is used in combination with the hydrostatic pressure operated switch to provide redundant assurance against accidental firing.

Abstract: In accordance with illustrative embodiments of the present invention, a hydrostatic pressure-responsive safety sub that prevents firing of an explosive well tool until it has been lowered below a predetermined depth in a fluid-filled well bore includes a body having an upper chamber that houses a detonator and a lower chamber that houses a booster which is attached to a primercord. A passageway between these chambers normally is blocked by an inner portion of a spring-loaded, hydrostatic pressure-responsive piston which is shifted inward against the bias of a combination of springs. When the explosive tool has been lowered to a predetermined depth in the well, a bore in the piston becomes aligned with the passageway between the chambers so that explosive forces generated by explosion of the detonator can reach the booster.

Abstract: In accordance with illustrative embodiments of the present invention as disclosed herein, a safety switch for preventing accidental firing of an explosive well tool includes a tubular metal body connected between the cable head and the well tool, a conductor wire extending through such body for carrying current from the cable to the well tool, and a contact plug mounted in a slide opening in the body and arranged to be selectively advanced into shorting contact with the conductor wire.

Abstract: A multiplex optical sensing system comprises an optical fibre arranged to be subjected at the longest length to fibre deforming forces during operation of the system and means for producing a plurality of pulse trains of coherent light in which the frequency of frequencies of (F1+.DELTA.F1), (F2+.DELTA.F2), (F3+.DELTA.F3) of the pulses in respective pulse trains lie within a different frequency channel for transmission along said optical fibre.