Leeds & Northrup apparatus at the Louisiana Purchase Exposition 1904 (1904)
Leeds and Northrup Company · Leeds and Northrup Company · leaf 30
depressed, thegalvanometer is short circuited, and its oscillations are quickly dampedout by the currents induced in its coil. The back end of the spring isheld in a slot in a rubber block, and this is held in a slot milled in thebase. By this construction the perfect matching of the contacts is… … 5110. Double Contact Key $10 5° Tt will be noted that the same method for holding the springs is used THE LEEDS & XORTHKLl COMPANY in the design of this key as in the short circuiting key. the method beingextended to the base and three blocks.
Electricity · Electrical Equipment · Electric Circuits · Electronics
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