International Library of Technology · Scranton, International Textbook Co. · leaf 707
onnection to the spring contact d, which is insulated fromthe frame and all other wires. The bell circuit is closed firstthrough a-b by means of the push button; the armature e is at once attracted, there-by releasing the rod piece^,which falls by gravity andmakes contact with thespring d,… … circuit obtained, on pressing the push button />, is from thepositive pole of the battery B through the push to theterminal a of the drop, through the magnet coils to d, andthen through the bell to the negative pole of the battery.As soon as d falls, the magnet coils are cut out, the…
Electrical engineering
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