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Construction of the USNO Time Ball |
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Layout of the pole and ball hemisphere. |
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Fitting ball to pole. |
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Making top cap and pulley system. |
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Assembling ball to pole. |
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Fabricating ball inside support. |
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Temporary pole location. |
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Tie Siemers designing the winch. |
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Temporary installation. |
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Gary Wieder assembling ball halves. |
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John Pohlman, Gary Wieder mounting ball to pole. |
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First prototype of winch. |
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Dave Smith assembling ball. |
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