Regulator Clock with Gravity Escapement

Made:
1845-1855
maker:
J M Bloxam

Regulator clock with gravity escapement, by J. M. Bloxam, 1845-1855

Regulator clock with gravity escapement. In a gravity escapement the wheel train does not act directly on the pendulum, but is arranged to lift gravity arms which, when falling, give impulses to the pendulum. Such impulses are constant and independent of any variations which may occur in the power transmitted by the wheel train. The gravity escapement shown was invented by J. M. Bloxam about 1850, and was the immediate forerunner of Grimthorpe's gravity escapement as employed in 'Big Ben'. There are two gravity arms which are separately pivoted on the same axis, and the escape wheel consists of an inner wheel or pinion of nine teeth for lifting the arms and an outer wheel of nine teeth for locking the arms. The arms also carry projections which engage with the pendulum. A compensation pendulum consisting of a steel rod with a cast iron jar containing mercury is employed.

Details

Category:
Time Measurement
Object Number:
1879-32/1/1
Materials:
brass (copper, zinc alloy), cast iron, glass, mercury, steel (metal), wood (unidentified)
Measurements:
overall (inc. wooden case): 1840 mm x 389 mm x 280 mm,
type:
regulator clock
credit:
Mr. R. N. Bloxam and Miss D. K. Bloxam

Cite this page

Rights

We encourage the use and reuse of our collection data.


Data in the title, made, maker and details fields are released under Creative Commons Zero


Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence

Using our data

Download

Download catalogue entry as json

Download manifest IIIF

Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.