1386 THE COLLIERY GUARDIAN. June 19, 1914. a number of mines in railway trucks, and conveyed direct to the blast furnaces by means of a wire ropeway. The track passes through two angle stations, another ropeway branching off from the first angle station to a coke storage ground about 1| miles away. Coke which is not required for the blast furnaces is tipped auto- matically during the trip, either on the storage ground, or transferred to railway trucks by means of chutes, as illustrated in fig. 1. The track ascends from the second angle station to the level of the charging platform with a gradient of about 10 per cent., the last section being clearly reproduced in fig. 2. The angle station will be distinctly seen in the background to the right. Tower columns are erected in front of each of the three blast WORKS CONTROL LTD. This firm show a number of appliances for the control of operations in industrial plants, their scope extending over boiler plants, gas works, coke ovens, blast furnaces and mines ventilators. The “ Factum ” differential draught gauge is based on the principle that the loss of pressure between the point where the air is admitted, and the exit of the air is directly proportional to the quantity of air. The gauge measures and indicates the difference in pres- sure, thus enabling the stoker to operate his boilers to the best advantage, when once the best differential draught has been ascertained. The instruments may instrument as well as the instrument itself are always kept cold, as they are filled with condensed water. In coke oven plants the great importance of the closest record and control of the exact amount of gas produced and used is more and more recognised every day. The “ Factum ” gas meter not only continuously measures the amount of gas, but also—and this is still more important—gives the volume during any unit of time and records this on a 24 hours’ or seven days’ chart. It may also be used at blast furnace plants to measure and record uncleaned hot or wet blast furnace gas. The instrument will not only record the quanti- ties of produced or used gas, but will also give a com- plete record of time and duration of each discharge of Bleichert pi ?A’^ £ Y'-- .'a-mWV iiiij tSi A . -,A< . ‘Lit'-; •■■■■ • . S k A AA AA; A??'<■ ’ll Fig. 2. (Bleichert’s Aerial Transporters Ltd.) Bleichert ■ ■ ■ A - - '■AAA ■. • . V A.AAA ApA A ^A-.,;,A Fig. 1. (Bleichert’s Aerial Transporters Ltd.) furnaces as support for the carrying rope and serve, at the same time, to carry the hoppers. The first tower, which will be observed in the illustration, is intended for a blast furnace, which will be installed at a later date. A protection net is stretched along the whole track over the iron works as a safeguard against material falling from cars which may have been overloaded. The coke is tipped during the trip into the intermediate bunkers, and the material is then drawn off into special charging cars as required. The ore and flux are brought up to the platform by vertical elevators. A four-wheel carriage exhibited in the foreground of the stand in natural size is for the purpose of increasing the hourly capacity of wire ropeways. If there happen to be practical reasons against increasing the number of cars running in the hour, the necessity of handling heavier loads has led to the adoption of this special Bleichert construction. Though the carrying ropes are saved as much as possible, the 4-wheel carriages are still able to carry loads of 3 tons and above. Alongside the 4-wheel carriage a standard telpher car is exhibited. With the employment of the patent block system an unlimited number of such cars can run automatically in the interior of works, so that excedingly high capacities can be reached. Another interesting exhibit is the plaster model of a wire ropeway installed in East Africa for the transport of cedar wood. The fall of this line amounts to about 4,700 ft. and, with a gradient of 86 per cent., it is the steepest wire ropeway for goods traffic in the world. The longest span crosses the valley Ngoha, and has a length of about 3,000 ft. KENNICOTT WATER SOFTENER CO. The Kennicott type “K ” water softening plant is shown, fitted with patent revolving sludge gear. also be used for checking the efficiency of mechanical stokers, and since they may be placed out of reach of the fireman, they can be made to supply a graphic record of the latter’s capacity. The “ Factum ” recording steam meter, which is shown herewith consists of a throttling disc inserted into the main and the recording instrument. The throttling Fig. 1.—Recording “ Factum ” Air Meter. (Works Control Limited.) disc creates a slight decrease in pressure, which is of no consequence to the working of the plant. The pressures in front and behind throttling disc are measured, and the difference in pressure, which is proportional to the quantity of steam, is the theoretical basis of the steam meter. The connections between the main and the the furnaces. Where gas for either heating or power purposes is distributed over various departments, the meter gives account of all such deliveries, checks the consumption of the boilers and gas engines, and pre- vents waste. The instrument has also an important application at collieries to control the ventilation, as it gives a continuous record of the actual volume of air Fig. 2.—“Factum” System de Bruyn Recording Steam Meter. ■'.S'. a-.w ' M K Q P. G. Cc H. B- Hill A = Cylindrical body. B — Filling tube. C = Plus tube. D - Minus tube. E = Double cock. F = Float. Gr, Grl = Float guides. H = Lifting eyes for float. I = Writing pen gear. K = ( ’lock support. L = Clock. M = W inding lever for clock. N = Chart drum. O = Metal hood. P = Rubber disc. Q = Fly nuts. Fig. 3.—“Factum” Gas and Air Meter (Volume Recorder). (Works Control Limited.) in any of the shafts. It may also be employed in asso- ciation with air compressors to measure the exact quan- tity of air on the suction side of turbo-compressors giving a detailed record on the chart. The recorder is based on the hydrostatic principle,