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Light and Heavy Vehicle Technology
book

Light and Heavy Vehicle Technology

by M.J. Nunney
March 2016
Intermediate to advanced content levelIntermediate to advanced
514 pages
33h 25m
English
Newnes
Content preview from Light and Heavy Vehicle Technology
ELECTRICAL SYSTEM 491
contact-breaker points automatically become separated
to interrupt the current flow, which momentarily de-
energizes the system and releases the armature, thereby
allowing the points to close again. This cycle of events
is continuously repeated at a frequency determined by
the characteristics of the flexing diaphragm.
Merely allowing the diaphragm to vibrate in the
manner of a simple buzzer would not, in
itself,
produce
the desired sound from the horn. In practice, a more
effective sound is obtained first by letting the armature
strike the pole piece of the electromagnet, which sets
up a relatively low frequency of vibratio ...
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Publisher Resources

ISBN: 9781483105062