Mantel and Table Clocks

Rolling ball table clock

    Rolling ball table clock

    Great Britain, London

    circa 1820

    Santiago James Moore French (master), William Congreve (inventor, patent author)

    Brass, wood, shellac, velvet, glass; silvering, gilding, engraving

    "Rolling ball" clock, in a purpose-made glazed case, invented and patented by Sir William Congreve in 1808. Clock on inclined plane of the type invented by William Congreve; ball rolling down zigzag grooves in the open frame with columns at the sides; surmounted by three silvered-metal rings indicating seconds, minutes and hours; original Sheraton satinwood case with stepped base and columns surmounted by domed glass hood.