weight-driven drum chronograph
Datecirca 1880
Inventory Number1989-4-0015
ClassificationChronograph
Subject
Maker
William Bond and Son
?
fl. 1793 - 1977
Cultural Region
Dimensions32.5 × 60.8 × 43 cm (12 13/16 × 23 15/16 × 16 15/16 in.)
Material
DescriptionCylindrical brass drum, connected to several brass gears, mounted on a cast iron, rectangular base. To the side of the drum is a brass box on brass legs, holding a long screw. The box is connected to a brass gear which links with the gears connected to the drum. On the other end of the gears is a brass box, with several brass posts on top. To the left of the box is an electromagnetic coil.
Signedunsigned
FunctionChronograph used to make precise time measurements, such as transits and other astronomical observations. A piece of paper specially cut is wrapped around the drum and secured with thumb screws. As the drum revolves slowly owing to the clock mechanism, a fountain pen is clamped against the paper to draw a fine line.
American
Date: mid 19th-early 20th Century
Accessories: A metal crank handle; a metal crank handle with a wooden knob
Object number: 1996-1-0332
International Instrument Company
Date: circa 1892
Accessories: duplicate of nameplate (1997-1-1847b); pulley
Object number: 1997-1-1847
International Instrument Company
Date: circa 1892
Object number: 1997-1-1847b
Watkins & Hill
Date: 1830-1850
Accessories: bracket legs (2 pair), removed in 1956 when conserved by staff of Hagley Museum, Wilmington, Delaware, ca. 1956
Object number: 5818
Alvan Clark and Sons
Date: 1910
Object number: 2003-1-0077b
Davis & Son
Date: 1843-1873
Accessories: small metal key
Object number: 1998-1-0606
