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Naval Meteorology and Oceanography Command U.S. Naval Observatory
Wednesday November 22, 2017

Home About History Instrument Shop Telescopes

Construction of the USNO Time Ball
Instrument Shop 1999


Layout of the pole and ball hemisphere.

Fitting ball to pole.

Making top cap and pulley system.

Assembling ball to pole.

Fabricating ball inside support.

Temporary pole location.

Tie Siemers designing the winch.

Temporary installation.

Gary Wieder assembling ball halves.

John Pohlman, Gary Wieder mounting ball to pole.

First prototype of winch.

Dave Smith assembling ball.

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