Abstract: A syntactic analyzer recognizes a series of spoken words as one of a set of predetermined sequences of prescribed words defined by a state sequence array of state transition signals representing state linked prescribed words. Each sequence corresponds to a selected plurality of linked state transition signals ending in a final state. For each word position of the series, a set of signals representative of the acoustic correspondence between the position word and the array prescribed words is generated. A cumulative correspondence signal is produced from the array state transition signals and the correspondence signals. Upon termination of the last word position, the sequence having the closest cumulative correspondence to the spoken word series is identified.

Abstract: A privacy communication arrangement temporally rearranges an intelligence signal to produce an uncorrelated scrambled signal. The intelligence signal is sampled at a predetermined rate and the samples are divided into groups of N successive samples. Each N successive sample group is uniformly permuted by transposing the i.sup.th sample (i = 1, 2, . . . , N) to the K.sub.1 i.sup.th (modulo N) sample position, where K.sub.1 is an integer prime with respect to N. The uniformly permuted group is transformed into the N successive sample group by transposing the j.sup.th sample of the permuted group to the K.sub.2 j.sup.th (modulo N) sample position.

Abstract: A tool adapted to simultaneously heat a plurality of spaced electrical elements for soldering includes an elongated heat generating member connected between spaced, parallel, relatively massive and high conductivity rectangular cross section bars. An arcuate lower portion of the heat generating member disposed between the bars is adapted to contact the surface to be soldered. Electrical current applied to one end of one bar and to the opposite end of the other bar is directed uniformly through the heat generating member transverse to the elongated dimension thereof to provide a uniform temperature to all the spaced elements. Upon discontinuation of the electrical current the relatively massive bars are operative to rapidly remove heat from the heat generating member.