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Rolling ball clock by E. Dent and Co

1920

Model by Dent showing the mechanism of stop watches

Model of mechanism for setting hands

Dent's patent liquid compass with air chamber around rim

1860-1870
Photograph (7"x9") of a barometric compensation for the new standard clock at the Royal Observatory, Greenwich, supplied and E. Dent & Co. Ltd., Strand, London, UNited Kingdom, 1876

Photograph of barometric compensation for new standard clock at the Royal Observatory

1876
Clock, recording clock (patent number 544119)

Recording clock

1901-2000
Model by Dent of lever escapement for use with lantern, 1850-1883

Model of a Lever Escapement , 1850-1883

1850-1883
Marine balance springs

Marine balance springs

1875-1925
Clock, recording clock (patent number 544119)

Recording clock

1901-2000
Copy of Gravesande's first heliostat

Copy of Gravesande's first heliostat

1878
Framed drawing (16½-inches x 2-foot 6-inches) of a compensation pendulum.

Frame drawing of compensation pendulum

1876
Model of chronometer escapement, for use with a projecting latern, made by Dent, 1950-1883. Represents the detent chronometer escapement, invented by Thomas Earnshaw 1777-1787. This escapement was typically used in marine chronometers.

Model representing Earnshaw's detent chronometer escapement, 1950-1883

1950-1883
Model by Dent of Graham's cylinder escapement for use with lantern, 1850-1883

Model of Graham's Cylinder Escapement, 1850-1883

1850-1883