Clockdrive



 
 
The clock for the telescope, less the hanging weights.  This would be mounted in the telescope pier, inverted from its position in the picture.
The clock mechanism itself is a straightforward collection of gears.  
The drum on which the cable is wound that supports the hanging weights.
The beveled gear accepts the shaft in the last picture on this page.
The aluminum vanes on the governor extend farther out as the rotation speed increases, thus slowing the rotation down slightly, resulting in a regulation of the clock speed.
The weight hanger to the left measures 6" x 4" x 8" and weighs 50 lbs. The smaller weight measures 2" x 4" x 8" and weighs 16 lbs. There are a total of 4 of these weights that can be added to the hanger.
The rod and beveled gear referred to above. The other end of the rod connects to the steel shaft on the gear assembly next to it. The worm gear then drives the large gear on the polar axis of the telsecope.

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