Abstract: A bag-like container of flexible plastic material snugly confines the ischial padding and body of an emergency traction splint for an injured leg while allowing access to the traction-inducing components thereof. Additional biohazard shielding is afforded by an integral cover of flexible, impervious material sufficiently rigid to provide a protective enclosure for patient transport. The container and the cover as well as the attendant malleolar harness are disposable. A barrier against cross-contamination from biohazards present in human body fluids is provided.

Abstract: An apparatus for removing adhesive or other contaminants from a hand trowel. Two embodiments are disclosed, each including a body having a slot extending through at least a portion thereof, and through which the trowel blade is drawn for cleaning. A pair of opposing scraping blades is mounted to the body, on either side of an entry end of the slot. The blades are maintained in spaced relation, a distance approximating the thickness of the trowel blade. In one embodiment, the body includes, at one end, a handle for gripping. The underside of the body may also be attached to another blade, having a special scraping edge on its forward portion. In this configuration, the first embodiment performs yet another cleaning function, as a floor scraping tool. In the other embodiment, the body is structurally integrated with a reservoir, or trough, adapted for mounting over a portion of the lip of a bucket containing adhesive.

Abstract: In order to improve the trim of a power boat ready to accelerate toward "on plane" speed, a deflector plate is deployed by gravity from a substantially horizontal attitude toward a rearward-downward inclination, the deployed plate being located so that a predetermined portion only of the propeller backwash is intercepted. Latching mechanism locks the deflector plate at an optimum angle of deployment until the boat reaches a speed slightly in excess of "planing" speed at which juncture the deflector plate is unlocked by remote control, either automatically or manually. The device can be used either for outboard motor or stern drive propulsion units.

Abstract: An apparatus and method effecting a linear color transformation between foreground video and insert video, in a chroma key video image. A determination is made whether a particular pel, or pixel in the foreground video image is either a full foreground pel, a full blue screen pel, or a transition pel. Predetermined "look up" tables store color values in vectorscope domain which correspond to endpoint UV foreground and endpoint full background UV blue values, for each foreground to background transition pel. A key signal related to the percent distance of each such transition pel from these two endpoints in the UV plane is created. The composite output pel is formed from the current YUV transition pel value, by subtracting the selected full blue YUV from it, and adding insert video to it in proportion to the key signal.

Abstract: An apparatus and method for automatic and remote testing of check valves and backflow preventers. Pressure sensors have ports in communication with chambers upstream and downstream from a check valve to be tested. The sensors may be pressure transducers or pressure switches, of single stage, differential, or "dead band" design. Zero or substantially zero liquid flow through the check valve is confirmed either by an existing water flow meter or an auxiliary water flow switch. Upstream and downstream pressures are sampled, and the differential pressure therebetween is compared with predetermined standards and a pass/fail report is rendered. The report may be stored and communicated by hard wire or wireless means, to a remote facility where like information is received from a plurality of check valve sites. One of the three disclosed embodiments teaches an apparatus and method for testing a backflow preventer including a pressure relief valve operating on the reduced pressure principle.