Abstract: A magnetic influence minesweeping system and a method are disclosed wherein hree large area air core solenoid coils are arranged with their planes in mutually orthogonal relation. A battery power supply and alternating current pulse generator are utilized to successively energize each coil and generate three magnetic fields having mutually perpendicular principal axes.

Abstract: An electroacoustical transducer is disclosed as incorporating a metallic sing having an aperture located in the wall thereof. A plurality of shutters are rotatably mounted on said housing for effectively and timely opening and closing predetermined portions of said aperture. A plastic support member is disposed within said housing, and a slot is located therein in alignment with said aperture. A wooden frame is disposed in said slot in such manner as to effect a semi-resilient lining therefor, and an electroacoustical energy converter element is disposed within said frame lining. A shutter actuator, either programmed or manually operated, is connected to said plurality of shutters for respectively moving them in such manner as to effect predetermined openings and closings of the aforesaid aperture.

Abstract: A cable traction sheave is described comprising a metal sheave body fixed a rotatable hydraulic motor housing and having a novel cable groove liner. The liner is formed of a solid elastomeric and has a band of pressure release material that permits deformation of the liner so as to increase lateral pressure on the cable to preserve the round shape thereof and increase gripping of the cable by the liner. An alternative embodiment comprises spring elements embedded in an elastomeric liner and configured to cause the liner to grip the cable in response to cable pressure.

Abstract: A system for timely holding and releasing an object to be deployed in a petermined environmental medium is disclosed as incorporating a platform, a rotatable drum, and supports for said rotatable drum effectively mounted on said platform. A curved arm is attached to said drum at one extremity thereof, and a latch mechanism is releasably connected to the other extremity thereof. A rope extends around said curved arm, from which the object to be deployed is suspended within a shute, barrel, or slide, the latter of which may or may not be a part of the aforesaid platform.

Abstract: A preparation and a method are described for emergency, interim treatment extensive burn injuries, e.g., flash burns, to external portions of a person. A solution of the polymer poly-.epsilon.-caprolactone is a volatile solvent, such as acetone or tetrahydrofuran, is applied to the burn area by spraying or swabbing, so that upon evaporation of the solvent a film of the polymer is left to serve as a barrier to insensible water loss.