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The International
Time Recording Company, makers of all types of timekeeping systems, was
made a division of the IBM corporation. Their traditional conservative
wood case styles gained the "Deco" fashion during the late 1920s
and well into the 40s.
The master
clock at the right and the example of the "Deco" slave dial
are internally the same electromechanical devices one would find in the
more conservative style cases.
The IBM clock
systems were widely used in factories and schools to assure that all departments
and classrooms were functioning on the same time schedule. The master
clock generates a brief electrical impulse once every minute. The impulse
is conveyed to classroom or office secondary "slave" dials over
building wiring. IBM patented a unique system that assured that every
secondary or slave clock was supervised electrically to assure synchronism
with the master clock. If, as the hour came to a close, any slave clock
was not exactly in step, it would be automatically brought into step with
the master by either omitting some impulses or adding extra advance impulses.
Competing
companies such as Standard Electric Time company and the Cincinnati Clock
Co. had similar automatic correction schemes.
IBM sold
the Time Equipmment Division to Simplex in 1958.
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Height:
14 inches
Width: 14 inches
Depth: 4 inches
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