This week our cover shows a powerful electric lifting magnet at work in a scrap yard, moving empty shell cases. The lifting magnet is attached to a 5-tons overhead travelling crane. The magnet is circular, a type suitable for lifting such loads as pig iron, solid ingots and scrap metal.
POWERFUL ELECTRIC LIFTING MAGNET at work in a scrap yard, moving empty shells and other pieces of scrap metal. The magnet, which is of the circular type, is attached to a 5-tons overhead travelling crane. Lifting magnets of circular shape are most suitable for such loads as pig iron, solid ingots and scrap metal of varying sizes. Direct, or continuous current is used for electric lifting magnets, and they are generally built for a 110-volts or 200-volts supply.
One of the most spectacular applications of the principle of electro-magnetism is the use for industrial purposes of giant electric magnets capable of lifting loads of up to 25 tons in weight.
At a height of 11,340 feet above sea level, in a chamber blasted from the rock of the Jungfrau, one of the highest mountains in the Bernese Oberland, engineers have built a telephone exchange.
Machines of many types and advanced design are now being used by large garages to test the performance and braking power of cars, and to maintain cars in the best possible running order.
The large quantities of grain from the prairies of Canada, or other wheat-growing districts, to the flour mills of Great Britain can be handled rapidly in bulk only by special machinery of remarkable design. The flow chart in this chapter shows how grain is handled from the moment the grain ship draws alongside the quay until the grain is delivered into the huge storage bins which are known as silos. This is the ninth article in the series on the Romance of Industry.
Problems of making suitable foundations in waterlogged ground, of strengthening faulty foundations and of treating of leaky tunnel linings have all been solved by various ingenious processes.
One of the latest devices for minimizing rolling has been fitted to the Isle of Sark, a cross-Channel steamer of the Southern Railway Company plying between Southampton and the Channel Islands. It is known as the Denny-Brown Ship Stabilizer, and this device is fully described in this chapter. This is the seventeenth article in the series on Modern Engineering Practice.
The engineer is continually battling against the titanic might of the Mississippi River. The problem has proved too formidable for local effort, and its solution is reorganization under national control. This chapter is concluded in part 28.
