Some aspects
of precision time measurements, controlled by means of piezo-electric-vibrators,
as deployed in Germany, prior to 1950
This paper is
based on my contribution to a Colloquium on "Time Keeping" held at Imperial
College London, February 2000
Keywords:
The second is the unit of time
interval which is used in physics and which is the 86400th part of the everage
daily rotation of the earth .... ; From lapis electricus to pieze-electricity
... ; Ceylon magnet; Pierre and Jaques Curie published ... ; Cady applied for an
American Patent on 28 January 1920 ... ; Pierce ... ; Pierce-Miller oscillator
... ; Marrison .. Mason .. Hansell ... ; PTR .. ; Giebe and Scheibe .. ;
Luminous quartz (Leuchtquarz) ... ; Radio-Frequenz Leuchtquarze ... ; PTR Quartz-clock development ... ; Quarz-Uhr ... ; Scheibe and Adelsberger .. ; The first
statistical proof of the deviation of the daily earth rotation .. ; General
Radio quartz clock C-21-H; Lothar Rohde's quartz clock type CFQ ...; CFQ
technical description ... ; DIH Hamburg ... ; Early efforts on electronic BCD
counters, Rehbock (Roebuck) a very revolutionary radar-range-calibrator;
Turmalin piezo-electrical-vibrators Carl Zeiss Jena, Straubel and Gerber
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