Weights

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          Brass tower clock-Saff (11a).jpg (348795 bytes) This shot shows the initial mockup of the weights made out of paper tubes. Additionally, most of the rest of the parts that Buchanan would eventually make are shown in wooden mockups.
Brass tower clock-Saff (31a).jpg (649180 bytes) Here the mockups are are replaced by the fabricated parts, before final finishing.
Brass tower clock-Saff (81).jpg (613268 bytes) The weights as shown are about 3" longer than the final version. It was found that after the clock movement's completion the trains could run on about 15% less weight than originally thought. The shell is filled with a number of lead disks. The movement runs satisfactorily with two disks removed and the weight barrels were trimmed by the width of one disk, allowing room for the insertion of one disk should the need arise.
Brass tower clock-Saff (58).jpg (763155 bytes) The weight needed for the strike trains comes in at around 70 lbs. each (the going train about 40 lbs.) This mass is too great to create a single sealed unit that would have to be moved around in one piece. This especially considering the highly polished weight shells. The bottom of the shell is a thick brass disk that has steel rod attached. The lead disks are loaded up on this rod. The shell is threaded to accept both bottom and top covers and the line attachments are then screwed to the top of the threaded rod. In this way the weight can be disassembled for transport and makes setup much safer.
Brass tower clock-Saff (16).jpg (589947 bytes) The next two shots show some of the fabrication steps.
Brass tower clock-Saff (82).jpg (680843 bytes)  
             Brass tower clock-Saff (69a).JPG (904725 bytes) This last photo is to show the weights with the shells removed just to the right and above the pendulum bob. Note that even the lead weights which will never bee seen are carefully machined to close tolerances.

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