Tempus by Bernie Mesa

Specifications

Download the TEMPUS Clock Booklet

Tempus technical functions

In a conventional clock, the oscillation period depends only on the hanging pendulum length, not its mass. In a rotary pendulum, the masses and their distance from the center determine the period. Once the period is defined, the gears’ sizes and rations can be calculated.

The TEMPUS pendulum weighs 5 pounds, its period is 4 seconds. A small electric pulse from a battery keeps the pendulum oscillation amplitude constant and therefore the timing constant. Every pendulum cycle advances the six petal Maltese cross through a ratchet wheel.

There are four gears between the pendulum and the clock dial, a worm and mating worm gear, an intermediate spur gear and the minute and gear. The hands are driven through a clutch to allow setting the time. Between the minute and hour hands is the standard 12 to 1 gear set. There are eight gears and five shafts in total. The shafts are mounted on miniature ball bearings for minimum friction.

Height in inches
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KODAK Digital Still Camera
KODAK Digital Still Camera

click above to watch

Here is a video showcasing the pendulum cycle advancing the Maltese cross through a ratchet wheel

View entire TEMPUS image and video gallery

Tempus by bernie mesa

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