Abstract: A vortex-shedding mass flowmeter which includes a shedding body mounted in a pipe containing a flowing fluid, a first detecting element that responds to the vortices generated when the fluid flows past a surface of the shedding body for producing a velocity signal proportional to the flow rate of the fluid, a second detecting element for sensing in a measuring plane that includes the surface of the shedding body where vortices are generated a moving fluid characteristic dependent on the product of fluid density and the square of the fluid flow rate, and electronic circuitry coupled to the outputs of the first and second detecting elements for producing therefrom a mass flow rate signal. In one preferred embodiment, the second detecting element is a pitot-type head device which senses a pressure differential between static and dynamic pressures existing at two locations on the measuring plane.

Abstract: A non-dripping sweat band that encircles the users head between the hairline and eyebrows with loose ends secured by quick release fasteners behind the user's head. The ban has a tube-like body formed by a porous cloth cover (e.g., cotton) which is bias cut to form panels on each side of a lengthwise fold. A strip of porous, thick batting material (e.g., Dacron polyester pad) is sewn lengthwise to the cloth cover and also to the edges of the panels. The assembly is turned inside out whereby the cloth cover is exterior of the tubular batting material which extends between the temples. Velcro strips can be attached to the loose ends of the body. The band is pulled into a flat belt-like band across the user's brow so as to wick sweat sideways away from the eyes and towards the sideburns where excess perspiration can be released. The band resumes a tubular configuration upon relaxation of the tensioning forces to promote quick drying after washing.

Abstract: A target flowmeter includes a target body with an aperture through its impact surface, to equalize the forces generated on the target under both laminar and turbulent fluid flow conditions, as well as in the transition region therebetween. In a particular embodiment, the target body has an annular shape and is centered about the pipe center line, the size of the aperture being such that the target is acted upon by only those portions of the laminar and turbulent flow profiles having substantially similar shapes. Since the annular body is unaffected by the high velocity peak of the parabolic laminar profile, the force versus velocity relationship in the laminar flow range is approximately the same as in the turbulent flow range. This results in a more consistently accurate flow velocity measurement across the two flow regimes. Specific dimensional relationships between the size of the aperture and that of the pipe serve to optimize these results.

Abstract: A system, for supplying electrical power from a source to a load, of the type employing phase controlled rectifiers for controlling the power from a polyphase source to the load includes circuitry to detect the existence of a rectifier which is conducting at an improper time and to provide appropriate corrective action to terminate such improper conduction.

Abstract: Certain arylterpenoid compounds having excellent potential as insect control agents. The compounds are highly active as eclosion inhibiting agents against four species of flies and three species of mosquito.

Abstract: A vortex-shedding flow-sensing instrument comprising a flat-faced vortex-generating plate integral with a downstream sensor-bar having flat sides set back laterally with respect to the rows of vortices shed from the edges of the vortex-generating plate. The side surfaces of the plate are tapered inwardly at a moderate angle, and extend down a short distance to rear surfaces at right angles with respect to the direction of fluid flow. The downstream end of the sensor bar comprises a tail piece the side surfaces of which are tapered inwardly at a moderate angle, and extend downstream a short distance to a rear surface perpendicular to the direction of fluid flow.The sensor bar carries on oil-filled capsule having as side walls a pair of flexible diaphragms effectively in the plane of the sensor-bar side surfaces. These diaphragms transmit alternating vortex pressure pulses interiorly of the capsule to a sensing element in the form of a ceramic disc having piezo-electric properties.