Abstract: A deicing fluid recovery system for aircraft deicing apparatus includes a storage tank from which a deicing fluid/water deicing mixture is pumped through a line heater to a deicing fluid distribution and collection zone for application to the wings and fuselage of aircraft. Expended deicing fluid is collected in a drainage system incorporated into a concrete or asphalt pad and directed to a sump. Upon accumulation of a sufficient quantity, the diluted used deicing fluid is pumped to a sludge tank. Solids and free water are separated by settling and filtration processes in the sludge tank. The filtered deicing fluid mixture is heated through sequential heat exchangers and directed to a regenerator. The deicing fluid mixture is leaned by a dehydration process in the regenerator in which the mixture is heated and compressed air is injected to exhaust water from a stripping column. The lean deicing fluid flows over an overflow weir into an accumulator.

Abstract: A discharge lamp operating circuit is connected to a source of alternating current (AC) voltage, and has a discharge lamp and a semi-resonant circuit connected to the source of alternating current voltage and in series with the lamp. A starting circuit for initiating operation of said discharge lamp is also connected in the circuit. The lamp switching maintains the series semi-resonant circuit in oscillation and the series semi-resonant circuit maintains the lamp in operation after operation has been initiated by the starting circuit. Highly efficient energy transfer between inductive and capacitive components of the system result in low loss and high power factor.

Abstract: A face mask safety shield structure having a shield support formed of a fire-retardant material with an adjustable head band for adjusting the structure to fit various sizes of user heads. A visor is attached to opposite sides of the shield and enables a user to raise the visor from a frontal horizontal position with respect to the shield support. The structure has a full length lens assembly of a length to fully cover the user's eyes and face and is removably secured to the visor to extend vertically downward from the visor when the visor is in the horizontal position to cover a user's eyes and face. The assembly has a tinted section positioned above a clear section with the tinted section formed to have a length less than the length of the clear section for shielding the eyes of the user. With the visor in the frontal horizontal position the user may look through both the clear and tinted sections and move the visor upward in an arc to swing the lens assembly away from the user's eyes and face.

Abstract: A pneumatic tire having a casing which defines in part an internal annular inflation chamber is provided with a small amount of low density, discrete, cellular, resilient, polymeric fibers within the inflation chamber to provide a reduction in the rate of inflation loss from the chamber upon puncture. Each fiber has many closed cells filled with gas and the polymer portion of each fiber is substantially all present as thin, filmy cellular walls. The fibers may be of varying length and may be added to the inflation chamber before or after tire is mounted on its rim.