Compressed air . BY TESTS OF AIR resnlts of three-weeks test upon ei/ht machines, using tlie nietliod shown in the diasrnm above. motor has well earned an important placein modern industry, and is likely to ex-tend its usefulness, it cannot of coursebe claimed that the field of power-drivenportable tools will be held exclusively tioned, they will hold their own for longto come over electric and other rivals. Portable Elcct-ic Motor.—In the pastthe electric motor has been handicapped in its introduction as a portable tool be- :OMPRESSED AIR. 4007 cause of its great weight and compar
Compressed air . BY TESTS OF AIR resnlts of three-weeks test upon ei/ht machines, using tlie nietliod shown in the diasrnm above. motor has well earned an important placein modern industry, and is likely to ex-tend its usefulness, it cannot of coursebe claimed that the field of power-drivenportable tools will be held exclusively tioned, they will hold their own for longto come over electric and other rivals. Portable Elcct-ic Motor.—In the pastthe electric motor has been handicapped in its introduction as a portable tool be- :OMPRESSED AIR. 4007 cause of its great weight and compara-tively high first cost, proportionate tohorse-power developed. For this reasonthe air motor has held a virtual monop-oly of this class of work, even in this Age of Electricity. Owii\g to great weight is possible by the use of alumi-num in armature and field coils. The illustrations show one type ofportable electric motor, attached to aplaner, grinding links which are giventhe proper motion by a jig on the bed. A FORMERLY UXDE?IR.\ELE TOE OF i Y .\IR TOOLS.
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License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectcompres, bookyear1896
