
4 0 c m
21cm
actual image size: 13cm x 32cm
Description
Before quartz clocks, synchronome equipment provided accurate time within work places. 'Slave' clocks were advanced by electrical impulses fro a master like this. Made by the Synchronome Co Ltd, according to a patent granted to W H Shortt in 1915.
Image Details
Image Ref.
10438280
© Science Museum / Science & Society Picture Library