Abstract: Mono-, bis- and tris-indolyl-substituted furanones useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared respectively by: the interaction of an indole with mucochloric acid; the interaction of an indole with a 4-mono(indolyl)-substituted 4-oxo-2-butenoic acid; and by the interaction of an indole with a 2,4-bis(indolyl)-substituted 4-oxobutanoic acid or with a 3,5-bis(indolyl)-substituted furanone.

Abstract: A drogue parachute deployment system for an ejection seat comprises a dro parachute mounted in a bag on the seat, a rocket motor, and a tow line attached between the parachute and the rocket motor. Upon firing of the rocket motor, the bag is caused to rip and the parachute is deployed.

Abstract: Fluorans useful as color precursors, particularly in the art of carbonless duplicating are normally colorless and are represented by the structural formula ##STR1## wherein R represents non-tertiary alkyl of one to four carbon atoms; R.sup.1 and R.sup.2 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R.sup.3 and R.sup.4 represent chlorine, or one of the groups --NR.sup.5 -(lower-alkylene)-N(R.sup.6)(R.sup.7) or --NR.sup.5 -(lower-alkylene-N.sup.+ (R.sup.8)(R.sup.9)(R.sup.10) An.sup.- , in which R.sup.5, R.sup.6 and R.sup.7 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R.sup.8 and R.sup.9 represent non-tertiary alkyl of one to four carbon atoms, R.sup.10 represents non-tertiary alkyl of one to four carbon atoms, benzyl or benzyl substituted in the benzene ring by one or two of halo or alkyl of one to three carbon atoms; and An represents an anion.

Abstract: Fluorans useful as color precursors, particularly in the art of carbonless duplicating are normally colorless and are represented by the structural formula ##STR1## wherein R represents non-tertiary alkyl of one to four carbon atoms; R.sup.1 represents hydrogen or non-tertiary alkyl of one to four carbon atoms; R.sup.2 and R.sup.3 represent chlorine or one of the groups--NR.sup.4 --(lower-alkylene)--N(R.sup.5)(R.sup.6) or--NR.sup.4 --(lower-alkylene)--N.sup.+(R.sup.7)(R.sup.8)(R.sup.9)An.sup.-In which R.sup.4, R.sup.5 and R.sup.6 represent hydrogen or non-tertiary alkyl of one to four carbon atoms; R.sup.7 and R.sup.8 represent non-tertiary alkyl of one to four carbon atoms; R.sup.9 represents non-tertiary alkyl of one to four carbon atoms, benzyl or benzyl substituted in the benzene ring by one or two of halo or alkyl of one to three carbon atoms; and An represents an anion.

Abstract: A rocket motor assembly for a rocket motor utilized for towing a load or racting an aircrew member from an aircraft. The rocket motor is formed in two separate sections, a casing portion and a unitary nozzle igniter housing portion. The nozzle and igniter housing portion has a circumferential portion that mates with the internal surface wall of the casing portion. A seal and fastener holds the housing in place whenever the rocket motor is assembled. A shackle secured to the igniter mechanism is fastened to a tow line extending to a load to be towed.

Abstract: An igniter mechanism for a rocket motor utilized for towing a load or extting an air crew member from a disabled aircraft. The mechanism operates whenever a sufficient force is exerted on the tow line to shear a pin allowing closure of the switch. Electrical energy coupled to the switch is conducted to a squib which ignites a charge to cause ignition of the rocket motor propellant. The electrical switch mechanism can only be actuated by a predetermined pulling force on the tow line thereby causing the electrical contacts to be brought positively together.