Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 35
INS ELECTRICITY The term damping effect means the offering of a retarding forceto control swinging vibrations, such as the movements of a galvanometerneedle, and to bring them quickly to rest. If a momentary current be passed through a balHstic galva-nometer, the impulse given to the needle does… … Pig. 526.—Queen dead beat and ballistic reflecting galvanometer. As illustrated, the coils areeasily removable and enclose a heavy block of copper fixed in a central fork. In a cylin-drical hole bored in this block hangs the bell magnet which n-ith its mirror is suspendedby a long cocoon fibre, and…
Electrical engineering
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