Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 226
60 wattsof energy is required. In general, such heaters should never be builtin but should be in plain sight. However, for many industrial pur-poses electric heaters are constructed as parts of tools or machinesand when well made and used with due care are not more hazardousthan other methods of… … Fig. 71. Effects of Careless Use of the Electric Iron sheets of tin or steel with an air space between them or by alternatelayers of sheet steel and asbestos with a similar air space. The electric flatiron is perhaps the cause of more trouble anddanger from fire than any other form of heater. The…
Electrical engineering
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