ABSTRACT
Most workshops are equipped with long lines of overhead shafting from which the machines below are driven by belts and pulleys. Anyone who has been through an engineering workshop will realise that the machines it contains can be classified in groups according as the tool or the work moves. Perhaps no change is greater in workshops than the wide application of grinding. The extent to which electric welding is employed would hardly be credited by those outside the workshops in which a wide variety of metal work processes is carried on. The cumbrous method of altering the speed of a machine by a belt and stepped or cone pulleys is then unnecessary, the mere adjustment of a lever being sufficient to alter the speed. Perhaps no part of modern works or factory equipment is more remarkable than that which transports the material from one place to another.
