Speaking time keeper

摘要

An apparatus for the listening to words representative of measurements of physical quantities according to which the measurements of said quantities are listened at time intervals controlled by a timer adjustable to operate at chosen time intervals, by means of at least one reading head reading recordings of said measurements, each obtained on the side surface of a revolving record cylinder along a circumferential track, said tracks being spaced away from each other at predetermined equal distances, the reading heads being associated with reproduction circuits.