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Lot description
A PREVIOUSLY UNRECORDED EARLY 19TH CENTURY REGULATOR BY LOUIS-ANTOINE JAROSSAY. A RARE HIGH-QUALITY FRENCH WALL MOUNTED REGULATOR WITH LONG DURATION the elegant mahogany case with shaped pediment, long glazed door with massive double lock and polished black marble backboard containing a profusion of fossils. The 6" white enamel dial with gilt bezel having a large centre seconds and subsidiary dial for hours and minutes fronting a long duration spring-driven highly individual movement with worm gearing, rear-mounted escape wheel and Graham deadbeat escapement with jewelled pallets, below the dial is the ingenious large pully with twin going barrels geared to drive around a fixed pinion that provides power via an endless rope. The regulator also has a rare form of temperature compensation which consists of an additional matched steel pendulum rod fixed in parallel to the working pendulum, with temperature changes this rod acts in opposition via a rocking linkage to lengthen or shorten the point of suspension of the working pendulum, 150cm high - This regulator is one of his earliest versions, later examples used pinwheel escapements, this clock is a superb and rare example of Jarossay's inventive mind.