Abstract: A disposable cover is provided for a stethoscope head, the stethoscope stem and the tubing immediately adjacent to the stem to help provide a barrier to prevent the transmission of harmful organisms or matter from the stethoscope head to a patient, or to the medical practioner, or to the general public and vice versa. The cover has an opening which is stretched to receive the stethoscope head and a loose casing capable of enveloping the stethoscope head. The loose casing does not need to stretch during insertion or while enveloping the stethoscope head. The loose casing allows the stethoscope head to simply drop down into the cover to the closed end.

Abstract: An improved billowing rotary kite is provided. The rotary kite includes a hollow, collapsible wind receiving surface. An air inlet end of the wind receiving surface is retained open by a collapsible and adjustable frame affixed to the surface on a leading edge of the inlet end. Air flow through the kite is controlled by a flexible trailing edge at an air outlet end of the surface. The flexible trailing edge comprises a plurality of longitudinal vanes that extend about the air outlet end of the surface. The fully collapsible surface, and collapsible and adjustable frame, provide a rotary kite that is fully collapsible for packaging or stowage purposes. The depth of the frame is adjustable for obtaining the highest possible rotative flight characteristics and rotative diving capabilities of the kite. In flight, air currents pass through the air inlet end of the kite, through the surface along a longitudinal axis thereof, and out the outlet end.

Abstract: A vaneless rotary kite suitable for rotation in a direction perpendicular to the wind flow is provided with a symmetrical wind receiving surface supported by a frame and open at the ends thereof permitting the passage of air currents therethrough with a flexible baffle at the air outlet to control air flow and with at least two air vents to facilitate rotation. This vaneless rotary kite can be maneuvered during rotative flight.

Abstract: A rotary kite suitable for rotation in a direction perpendicular to the wind flow is provided with a symmetrical wind receiving surface supported by a frame and open at the ends thereof permitting the passage of air currents therethrough with at least two air vents and at least two internal vanes to cause rotation.