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 108
s rotated by the torsion headj by means of the rubber covered nut k projecting through the glasstop of the wattmeter. The spring Si has its outer convolution securedto a lever which projects through the side of the case. By adjustingthis lever, correction to zero may be made. The staff g is of… … Fig. 88. Vertical Section of Roller-SmithPortable Torsion Wattmeter in manipulation is obviated. Vibrations of the movable element aredampened by the vane which is enclosed in the nearly air-tight box b.On the side opposite the dampening vane and just counter-balancing its weight is the needle h…
Electrical engineering
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