Antique Antide Janvier Clock

Price Type: auction
Sold Date: 11/11/2001
Pre-Sale Estimate: (subscribers only)
Sold For: (subscribers only)

Catalog Description:

Unique and spectacular astronomical, 3 week-going, double overhanging pendulum, "resonance" mantle regulator;Antide Janvier, c. 1810 Precision Timekeeper with 3 Complications; Antide Janvier, "pour son Ami Gorcy, compos oe Paris, termin en 1810".Unique and spectacular, astronomical, 3 week-going, double overhanging pendulum, "resonance" mantle regulator with two independent trains, each with one-second remontoir and Berthoud type detent escapement. C. Rectangular mahogany base with rounded front corners, applied ormolu decoration in the front depicting two fish spouting water, supporting a protective glass dome. D. White enamel, Roman numerals, outer minute ring, three hands: fleur de lis for the hours and blued steel index for the minutes driven by train No. 1 (left) and "poker" minute hand driven by train No. 2, winding apertures at 4 and 8 o'clock. The dial is flanked by two silvered humpback panels with seconds chapters at the top, theleft one driven by train No. 1 and the right one, running counterclockwise, by train No.2. M. Rectangular, 19,5 cm wide, 12,8 cm high, brass, mounted to heavy brass frame, two trains, each one with its own ingeniously simple constant force Berthoud detent escapement, two brass-steel gridiron compensating pendulums beating half seconds, knife-edge suspensions. Each escapement consist of pivoted rocking frame holding wheel, say, "A" and pivoted in such a way that it meshes with the pinion "B" (10eaves) of the fifth train wheel "C" (10 teeth) resembling an escape wheel. The rocking bar by the force of gravity falls down on the side where the wheel "A" is pivoted. The other side of the wheel meshes with 10-tooth escape wheel so, when the escape wheel is locked, the force of mainspring transmitted by the pinion "B" lifts the wheel A and consequently raises the bar, furnishing constant energy to the escapement. The end of the rocking bar is terminated with a detent that locks the wheel "C"ust after the lifting. The pendulum unlocks the escape wheel which is driven by the falling action of the rocking bar and so delivers an impulse to the pendulum with constant momentum. The pendulum is terminated by a platform holding the impulse pallet and unlocking spring, both with regulating screws. Two spring-loaded steel brackets securing pendulums for transport, four leveling knobs at each corner of the base, with a level at the back of the base, two length-adjustment knobs at the top of te frame. Signed on the movement, the dial, and both pendulums, the subsidiary seconds dials signed "A" and "J". Dim. Height 63 cm, base width 35 mm.

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