Finishing processes: automatic control’. Photo (17) from a series illustrating the making of a window. From page 19 of catalogue. The caption says ‘Automatic control. The contactor and relay panel which automatically controls the movement of the product through the department by operating the hoists and the pusher gear at a definite time interval set on the master clock’. The caption for all the four finishing photos says ‘Finishing processes. The protective finish applied to steel windows has always been of the greatest importance. A great deal of research has been undertaken within the metal window industry on this subject, and since the war, the industry as a whole has adopted the practice of zinc-coating metal windows by optional methods of spraying, sherardizing, cold galvanizing, and hot galvanising. We have adopted the method of hot-dip galvanizing, and have installed plants for this purpose at most of our factories. Here we show a few views of the plant recently installed at Braintree, which we believe is the first fully automatic window galvanizing plant in the world.’ See link for notes on the catalogue.

Ref	M1950
Publisher	Crittall Manufacturing Company Ltd.
Date taken	1951-1953
Source	Crittall Windows catalogue no.163, 1953. Published by Crittall Manufacturing Company Ltd., Braintree. Large book. Copy lent by John Thurgood of Terling. There is another copy at Braintree museum.