320
MODERN GASWORKS PRACTICE
house stokers without delaying them in their work. The design was carried out by Mr. Jolm West, and consisted (Fig. 233) of a cast-iron trough 24 in. wide by 9 in. deep, in which an endless chain travelled on a central rail. The chain was composed of cast-steel links bolted together, and to each alternate pair of which were cast blades which conformed to the shape of the trough, but did not béar upon the sides or base of it. From such original and comparatively crude designs, ho wovor, effective appliances have now been evolved, and it is interesting to compare the present-day West model (Fig. 235) with its forerunner.
The De Brouwer Hot-Coke Conveyor
This type of hot-coke conveyor (illustrated in Fig. 234) has probably been adopted more extensively than any other system, both in this country and on thfr Contment. The conveyor consists of a trough of varying width and depth, to suit the .quantity of coke to be dealt with, in which. the chain slides. This trough usually
Fig. 234.— The De Brouwee Hot-Coke Conveyor.
consists of a {-inch or f-inch steel bottom plate with steel channels or angles riveted along each side, the joints being made so as to form a watertight pan in which are placed cast-iron renewable bottom plates. These bottom plates are about f inch. thick in the middle with. raised patlis f inch. deep on each side for the cliains to slide