Impulsing roller

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Impulsing roller belonging to Shortt No 40 Master.

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ID:	ZBA1707.11
Type:	Impulsing roller
Display location:	Not on display
Creator:	Shortt
Date made:	Unknown
Credit:	National Maritime Museum, Greenwich, London
Measurements:	: 55 x 125 x 25 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)