Barnsdale, London. No. 2680.
A superbly engineered Gentlemens 19th century mahogany longcase regulator with round silvered dial signed Barnsdale, London, 18 Brunswick Place, No. 2680. The dial has a subsidiary seconds dial with Observatory markings, twice twelve subsidiary hour dial for am and pm, blued steel hands.
The massive movement has five huge double screwed pillars, very fine wheelwork with six crossings and high count twelve leaf pinions, jewelled pivot holes to the pallet arbor and escape wheel. Harrison’s maintaining power, deadbeat escapement with jewelled pallets. Beat setting adjustment to the crutch, the backboard suspended pendulum with roller suspension, massive lead bob and compensation arrangement comprising concentric tubes of zinc and steel to the design of Thomas Buckney. Brass case off set weight and crossed out pulley wheel.
The flame figured mahogany case of lovely colour and patina with canted corners to the break arch hood and trunk, glazed trunk door, flame veneered backboard and figured base with a single plinth. The solid mahogany backboard is incredible at one and a quarter inches thick. Everything about this clock is of the highest woekmanship.
William Barnsdale is recorded as working at 18 Brunswick Place, he was Master of the Clockmakers Company in 1906. His son William James Barnsdale was apprenticed to him on the 7th January 1878 for seven years and freed on the 6th April 1885. He became Master of the Clockmakers Company in 1919 and again in 1930.
Thomas Buckney's pendulum has a rod composed of tubes of steel and zinc with a central steel rod. The cylindrical lead bob has a calibrated rating nut to the underside. Thomas Buckney Junior (1838-1900) read a paper On the Superiority of Zinc and Steel Pendulums to the Royal Astronomical Society in 1886. He quoted various experiments where a zinc and steel pendulum proved more efficient in responding to temperature changes than mercurial counterparts. Thomas Buckney worked for the famous clockmakers Dent, when Elizabeth Dent died in 1865 Thomas Buckney and Amelia Gardner took control of the company.
- Height. 6 ft (184 cm)
- Date circa 1870