. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. Armature control spring Figure Moving-iron transducer with reasonable linearity Another configuration of this type of transducer is used in the moving-coil meter (Figure ). This is capable of only a very small mechanical output, and in its usual form has a very low resonant frequency. An ordinary moving-coil meter has however been adapted as an electrically controlled torsion balance; other similar applications when a small force only is required may suggest themselves. Pen. A/
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. Armature control spring Figure Moving-iron transducer with reasonable linearity Another configuration of this type of transducer is used in the moving-coil meter (Figure ). This is capable of only a very small mechanical output, and in its usual form has a very low resonant frequency. An ordinary moving-coil meter has however been adapted as an electrically controlled torsion balance; other similar applications when a small force only is required may suggest themselves. Pen. A/ r 9 y//A ^ 7\ V///////////////A Coupling spring Coil control spring .Moving coil. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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