Describes various ways of making a normally closed switch.
Magnetic reed switch sensor.
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Magnetic sensors and reed switches.
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The contacts are usually normally open closing when a magnetic field is present or they may be.
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Wilkis october 17 1967.
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Quite a neat summary of how reed switches are used in.
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Normally closed reed switch by anthony j.
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Introduction to reed switches magnets and magnetic fields by stephen day.
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The reed switch is an electrical switch operated by an applied magnetic field it was invented at bell telephone laboratories in 1936 by walter b.
Reed switches are available in bare glass or overmolded packages with a variety of mechanical electrical and magnetic characteristics.
In its simplest and most common form it consists of a pair of ferromagnetic flexible metal contacts in a hermetically sealed glass envelope.
