Leeds & Northrup apparatus at the Louisiana Purchase Exposition 1904 (1904)
Leeds and Northrup Company · Leeds and Northrup Company · leaf 37
, according as the current has decreased or increased. The contact1* is immediately moved in the same direction, until the spot of light isbrought back to zero, when the circuit is again closed, a point is printed,the spot of light again goes off the zero, and so on. Twenty poinlminute can be… … The contact maker shown in Fig. 6 is directly connected to the gen-erator or may be driven by a synchronous motor. In the latter case thecurves would not be quite accurate if any departure from strict synchro-nism occurred. A disc of hard rubber mounted on the shaft revolvthe same angular speed as…
Electricity · Electrical Equipment · Electric Circuits · Electronics
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