Synchronome Master Clock Serial Numbers4/14/2023 A more conventional modern battery can, however, be substituted, as I suppose it is here, perhaps in the lower two door cabinet. ![]() The energy driving the clock was originally obtained firm placement of electrodes into the earth and later from a zinc carbon couple buried 3-4 ft deep and 1 ft apart in moist soil, which is said to provide a potential of approximately 1 volt at the clock terminals. This master clock has the unusual distinction of having been designed for use with an earth battery (as had the earlier clocks of Alexander Bain). Mahogany cased, earth battery master time clock, supported by battery power, unsigned, but made in the style of, and attributed to the Peter Bentley Engineering Company, Leicester England circa 1910-1920. I am a bit uncertain about the origins of this standing floor clock and electro-physics is a bit far from my specialty. Thank you for sending in this most interesting floor clock to for an appraisal.
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