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2. Shortt–Synchronome clock - Wikipedia

   en.wikipedia.org/wiki/Shortt–Synchronome_clock

   On the left is the primary pendulum in its vacuum tank. The Shortt–Synchronome free pendulum clock is a complex precision electromechanical pendulum clock invented in 1921 by British railway engineer William Hamilton Shortt in collaboration with horologist Frank Hope-Jones, [1] and manufactured by the Synchronome Company, Ltd., of London. [2]

3. Atmos clock - Wikipedia

   en.wikipedia.org/wiki/Atmos_clock

   Older Atmos clock. The first clock powered by changes in atmospheric pressure and temperature was invented by Cornelis Drebbel in the early 17th century. Drebbel built as many as 18 of these, the two most notable being for King James VI & I of Britain, and Rudolf II of Bohemia. The King James clock was known as the Eltham Perpetuum, and was ...

4. William Hamilton Shortt - Wikipedia

   en.wikipedia.org/wiki/William_Hamilton_Shortt

   William Hamilton Shortt (1881–1971) was a railway engineer and noted horologist, responsible for the design of the Shortt-Synchronome free pendulum clock, a widely used time standard, employed internationally in observatories in the period between the two World Wars.

5. List of temperature sensors - Wikipedia

   en.wikipedia.org/wiki/List_of_temperature_sensors

   The integrated circuit sensor may come in a variety of interfaces — analogue or digital; for digital, these could be Serial Peripheral Interface, SMBus/I 2 C or 1-Wire.. In OpenBSD, many of the I 2 C temperature sensors from the below list have been supported and are accessible through the generalised hardware sensors framework [3] since OpenBSD 3.9 (2006), [4] [5]: §6.1 which has also ...

6. David Robertson (engineer) - Wikipedia

   en.wikipedia.org/wiki/David_Robertson_(engineer)

   This allows the period of the pendulum to be adjusted by changing the torque, under the control of a system that compares the pendulum phase to a time standard (originally a daily pulse sent out over the telegraph network at 10.00 GMT). Behind the pendulum and near its top is a standard aneroid barometer, and below that a mercury thermometer.

7. Electric clock - Wikipedia

   en.wikipedia.org/wiki/Electric_clock

   Zamboni's clock had a vertical needle supported by a pivot and was so energy efficient that it could operate on one battery for over 50 years. In 1840, Alexander Bain, a Scottish clock and instrument maker was the first to invent and patent a clock powered by electric current. His original electric clock patent is dated October 10, 1840.