Quartz conversion 1

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Brought in recently, a large (12in glass) school or factory slave electric clock. These clocks work on pulses sent every minute or half minute from a master clock. This one is French, with the maker’s name, Brillie, painted on the dial.

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The mechanism as fitted cannot be directly converted to battery or mains operation, and although there are add-on units which retain the pulse mechanism it is easier to install a quartz movement. I used a UTS high torque movement to cope with the large hands which the client wanted to retain. The hour hand was broached out to be a nice push fit on the Euroshaft spindle, but the minute hand needed a hand collet soldered to the underside.

The mounting of the glass in the bezel also needed attention as the original plaster sealing had dried to a powder – transparent silicone did the job. The dial and mechanism is retained by screws in a substantial spun aluminium case, and the final task was to cut a round access hole in the rear so that hands can be adjusted and batteries replaced without dismantling the clock.

 

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