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An image showing 'Record Shot - Do not reproduce.'

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Vacuum pump

The hand-pump used to evacuate the free pendulum chamber to Shortt No. 40.

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Object Details

ID:	ZBA1707.3
Type:	Vacuum pump
Display location:	Not on display
Creator:	Pulsometor Engineering Co Ltd
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London
Measurements:	: 500 x 355 x 280 mm
Parts:	Shortt master and slave clock system No 40 Pendulum (ZBA1707.1) Pendulum (ZBA1707.2) Vacuum pump (ZBA1707.3) Bell jar (ZBA1707.4) Bell jar securing ring (ZBA1707.5) Pendulum microscope and frame (ZBA1707.6) Leg for pendulum miscroscope (ZBA1707.7) Support frame for pendulum (ZBA1707.8) Pendulum scale (ZBA1707.9) Clock movement (ZBA1707.10) Impulsing roller (ZBA1707.11) Suspension spring (ZBA1707.13) Weights (ZBA1707.14) Screws (ZBA1707.15) Mounting bracket (ZBA1707.16) Mounting bracket (ZBA1707.17) Mounting bracket (ZBA1707.18) Pendulum tank (ZBA1707.20) Slave clock (ZBA1707.21) Master pendulum suspension (ZBA1707.22) Bolt from mounting bracket (ZBA1707.23) Mechanical part of the clock (ZBA1707.24)

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