long-case clock;
thirty-hour clock;
weight-driven clock
- Museum number
- 2010,8029.91
- Description
-
Movement and Dial of a Thirty-Hour Longcase Clock.
Case: missing.
Dial: Square, white-painted solid iron dial plate. The chapters 1-12 are painted inside a circle calibrated 1-60 for minutes and marked with black stars at five-minute intervals and numbered 15, 30, 45 and 60 at the quarters. Painted floral spandrels of pink and white flowers over an ochre background, with a green undulated border and black wheat-ear decoration over a blue ground in the area around the chapter ring. The area inside the chapter ring is plain white with the maker’s name and place painted in black in the upper half. In the lower half is a semi-circular aperture, with the edge painted in gold, revealing a white painted iron wheel calibrated 1-31 for the date and marked 3, 6, 9, 12, 15, 18, 21, 24, 27 and 31. Blued-steel hour hand and steel minute hand, the latter broken at the root and missing. The hands are retained by a screw in the end of the canon pinion pipe.
Movement: Weight-driven, thirty-hour movement with two brass plates and four brass pillars. Brass sprockets and shrouds for Huygens endless-rope maintaining power. Two-wheel going train, the brass wheels with four crossings. Anchor escapement, the brass escape wheel with four crossings. Pendulum control, the pendulum with plain steel rod and brass-fronted lead bob. Striking train with three wheels, each with four crossings, and a fly pinion with brass vanes. Striking is controlled by rack-and-snail mechanism. The hours are struck on a bell mounted on a standard screwed to the back plate. A later lever has been added to provide an hour-repeat function.
Motion work: The extended great-wheel arbor carries a wheel which drives a canon pinion mounted on a stud pivoted to the front plate which carries the minute hand. Mounted on the great-wheel arbor is a brass pinion of report which drives an hour wheel which drives the hour hand. The striking is released by a pin rivetted to the back of the canon pinion. A flag fixed to hour wheel pipe indexed the date wheel. The drive rope passes around a solid brass pulley and though a lead ‘doughnut’ counter-weight. Cylindrical lead driving weight.
- Production date
- 1805-1813
- Dimensions
-
Height: 30.50 centimetres (dial)
-
Width: 30.50 centimetres (dial)
-
Depth: 12.50 centimetres (overall)
- $Inscriptions
-
- Location
- Not on display
- Acquisition date
- 2010
- Department
- Britain, Europe and Prehistory
- Registration number
- 2010,8029.91