Abstract: 1. A circuit for simulating the scrambling of an electromechanical rotor of the type wherein an input to an input contact on one side of the rotor appears on one of a plurality of output contacts on the other side of the rotor in accordance with the wiring among the contacts and with the position of the rotor, which comprises first and second pluralities of switching circuits, means connecting the two pluralities of switching circuits in a manner dictated by the wiring between the input and output contacts of the rotor being simulated, means for applying an input to the first plurality of switching circuits, means for energizing a predetermined switching circuit in each plurality of switching circuits, and means for withdrawing an output from one of the second plurality of switching circuits.

Abstract: 1. In a facsimile apparatus, means for producing a stepped signal, the amplitudes of the steps being substantially dependent upon the photographic density of the subject and the durations of the steps being predetermined, a combining circuit and means for introducing the stepped signal thereto, means for introducing a coding signal to said combining circuit including a series of contacts and means for applying electrical potentials thereto, means for making successive circuits between the several contacts and the combining circuit, the durations of maintenance of the successive circuits being equal to the durations of the steps of the first mentioned signal, and means for synchronizing the circuit making means with the first mentioned signal.

Abstract: 1.

Abstract: 2. In an apparatus of the nature described, the combination of means for storing a portion of an electrical signal, means for picking up elements of said portion, a plurality of switching means controlling the conduction of said elements each switching means having a conducting condition and a nonconducting condition, and means for controlling the conductivity of the switching means including a bank of groups of switch contacts each group comprising contacts as numerous as the switching means, and means for selectively closing by groups the contacts of said bank.