model of a chronometer escapement
Datecirca 1820
Inventory Number5900
ClassificationEscapement Model
Subject
Manufacturer
Parkinson & Frodsham
1801 - 1947
Maker
William Parkinson
fl. 1802 - 1842
Maker
William J. Frodsham
1778 - 1850
Cultural Region
Place of Origin
Dimensions34.5 x 45.4 x 32.3 cm (13 9/16 x 17 7/8 x 12 11/16 in.)
Material
DescriptionSupported by four brass legs, a plateau in brass accomodates the escapement mechanism used for the demonstration. Two steel pillars support the big brass circle and watch spring that activates, via a vertical rod, the escapement mechanism. Under the plateau, a key is used to wind up the mechanism that drives the toothed wheel on the plateau. The spring mechanism does not activate the clock (or toothed wheel here), it only regulates its movement.
In Collection(s)
Signedon the main plate: Parkinson & Frodsham / Change Alley London
Inscribedon key: E G
FunctionDemonstration model to teach how a chronometer escapement work.
William Mason Stiles (I)
Date: 1839-1850
Object number: 1994-1-0012
Pulsometer Engineering Company, Ltd.
Date: 1901-1920
Object number: 1996-1-0235
William Bond and Son
Date: circa 1860
Accessories: carrying case
Object number: 2005-1-0015a
Reynolds Metal Company
Date: circa 1944
Accessories: see Description for itemized list
Object number: 1997-1-0796a
Reynolds Metal Company
Date: circa 1944
Accessories: see Description for itemized list
Object number: 1997-1-0796b