Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,703 pages of information and 247,104 images on early companies, their products and the people who designed and built them.
Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.
1859 Patent Improved Compensator and Releasing Railway Signal was exhibited in model form (described in The Engineer in September 1858); in this the variations in the length of the signalling wires induced by the alternate expansion and contraction due to changes of atmospheric temperature, are compensated by means of a weight, which is self-acting, in place of the usual adjusting screws.
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