Beschreibung:

An important William IV astronomical skeleton timepiece with mean and sidereal time James Gorham, London. Circa 1835 THE MOVEMENT Lightly stoned plates comprising two separate assemblies; the rear assembly containing the barrels and chain fusees with maintaining power, the forward assembly taking power from the fusee forward to the minute wheel, both trains with four delicate wheels with six crossings meshing with an intermediate wheel in the centre, the detached escapement with co-axial deadbeat 'scape wheels with steel pallets pivoting on a radially pierced brass platform mounted beneath the movement and regulated by an elaborate mercury-filled glass tube balance having a steel cross-bar with threaded brass timing weights, blued steel balance spring, ingenious spring detent stop/start system for the balance wheel, with two six inch globes, the terrestrial globe signed CARY'S NEW SIX INCH TERRESTRIAL GLOBE DRAWN from the latest AUTHORITIES, LONDON, published by G. & J. Cary January 1. 1835 , the celestial globe signed NEW CELESTIAL GLOBE pubd. by G. & J. Cary Jany. 1st. 1822 , both globes driven indirectly by large six-spoked wheels at the back of the movement, the terrestrial globe drive arbor fixed with a worm wheel engaging a large year calendar silvered ring rotating above the movement plates, the two globes flanking a long steel bar magnetic compass read from a silvered and calibrated North and South sector, between the globes a hair spring thermometer with silvered dial calibrated 0-150 FREEZING/TEMPERATE/SUMMER HEAT/BLOOD HEAT/FEVER HEAT THE DIALS The mean time dials indicated on the left side with large silvered hour ring having six crossings, Roman chapters and blued steel arrow hand, the minutes indicated to the lower left and seconds to the right with delicate blued steel hand and centred by a silvered plaque engraved Mean Solar TIME ; the sidereal dials with large silvered hour ring engraved with Roman chapters I to XXIV, minute ring on the lower right side and seconds on the left, the silvered oval plaque between engraved Sidereal TIME + 0.157 daily. , the central signature plaque engraved James Gorham WATCH AND CLOCK MAKER to the QUEEN. KENSINGTON THE CASE The lacquered brass movement frame secured at the angles by four columns with ball finials and resting on a brass platform set with a large mirror within a chamfered border, the ebonised rectangular moulded base with elaborate foliate scrolling bronze patinated feet, an ingenious winding system at the rear underside of the base comprising cantilevered brass levers with vertical steel arbors terminating with bevelled gears engaging the fusees, the entire movement enclosed by a brass-framed glazed canopy with baluster handles 22 in. (56 cm.) high, 22 in. (56 cm.) wide, 12¼ in. (31 cm.) deep