The most important clock in America : the David Rittenhouse astronomical musical clock at Drexel University / Ronald R. Hoppes.

Includes bibliographical references and index.

The dial -- The left hand side of dial -- The sun -- moon dial -- Repeat and strike selector -- Moon elliptic orbit and node indicator -- Right hand side of dial -- Equation-of-time indicator -- Manual tune play -- Tune play interval selector -- Tune repeat selector -- Tune indicator -- The top of the dial -- The orrery -- The center of the dial -- Date aperture -- The moon dial -- The calendar dial -- The gear trains -- Time train gearing -- Music train gearing -- Strike train gearing -- Hammer strikes per 12 hours -- Gearing on the front of movement -- Movement front plate gearing -- The dial gear trains -- The calendar hand -- Analysis of the gear train -- Equation-of-time indicator -- The analysis -- The mechanism -- The strike operation -- The manual repeat and warning phase -- Counting the strikes -- Controlling the bell hammers -- The music train -- The trip sequence -- Tune change gearing -- Music drum adjustments -- Setting the dial indications -- Preparation -- The calendar hand -- The equation-of-time dial -- The orrery planets -- The sun-moon dial -- The moon ecliptic node indicator dial -- The lunar dial -- Restarting the clock.

31560000044491 14447

Second enhanced edition, now includes a Rittenhouse biograhy, of the description of the clock including gearcounts, movement photographs etc taken during the 2004/2005 conservation