Abstract: An explosion suppression system wherein a photodetector (10), a capacitor circuit (12) and a detonator (14) provide an initiation signal to a dispersion tube (18). The dispersion tube includes a casing (20) having orifices (26), an inner tube (28) where the explosion suppressant is stored, and a propellant cord (34) that is located between the storage casing and the inner tube. In response to the initiation signal, the explosion suppressant is expelled from the orifices (26) and through nozzles (27) to form a controlled spray pattern to quench initial flame in a fuel tank before there is time for a damaging pressure rise.

Abstract: An explosion suppression system wherein a photodetector (10), a capacitor circuit (12) and a detonator (14) provide an initiation signal to a dispersion tube (18). The dispersion tube includes a casing (20) having orifices (26), an inner tube (28) where the explosion suppressant is stored, and a propellant cord (34) that is located between the storage casing and the inner tube. In response to the initiation signal, the explosion suppressant is expelled from the orifices (26) and through nozzles (27) to form a controlled spray pattern to quench initial flame in a fuel tank before there is time for a damaging pressure rise.

Abstract: A dental flossing tool that includes two sticks. A supply of floss stored in a hollow handle on one of the sticks is fed to a place of use between the sticks by the use of two spools, one each rotatably mounted on each stick. One spool withdraws fresh floss from the storage handle and the other collects and stores the used floss. The collecting spool has a cutter mounted thereon and has notches for aligning the floss with the cutter. The sticks have slits for entering the floss into openings that support the floss for use in a person's mouth, and the floss is stored on the tool with substantially no twist in the filaments of the floss strand and is withdrawn in a manner to avoid applying a twist. Portions of the tool may have a distinctive color for identification purposes and also for making the aforesaid notches clearly visible. The hollow handle not being used to store the floss may have a colored card therein to provide an alternative method of identifying one person's tool from that of another.

Abstract: A dental flossing tool comprising two tool members. One member supports a strand of floss between two closely spaced portions and the other member has a laterally projecting wire with a hook shape at the free end thereof. The wire is insertable between two teeth of a person and hooks the strand floss between the tips of the other member so that the floss can be pulled between the teeth by withdrawal of the wire from between the teeth. Upon such withdrawal, the two members can then be manipulated for flossing the two teeth. The invention has particular application for flossing the supporting teeth of a permanent bridge.

Abstract: Refueling equipment for aircraft fuel tanks of the type which are pressurized during flight of the aircraft by an airborne source of inert gas such as nitrogen to maintain the ullage gases noncombustible characterized in that the fuel during the course of its flow through said refueling equipment is deoxygenated before it reaches the aircraft fuel tank with the oxygen liberated from the fuel being discharged from the refueling equipment.

Abstract: This invention relates to an apparatus for transferring a cryogenic fluid from one dewar to another and is characterized in that it provides a means for equalizing the temperatures in the liquid and vapor spaces of the supply dewar whereby the pressure in the dewar may be utilized for accurate control, either manual or automatic, of the amount of heat that must be added to the cryogenic liquid supplied to the receiving dewar for obtaining the desired receiving dewar pressure with minimum addition of heat to the supply dewar and no loss of cryogenic fluid through overboard vents during the transferring process. The apparatus has particular application as a ground servicing unit for filling liquid nitrogen dewars in aircraft.