Experimental micrometer using Ayrton-Perry magnifying spring to read to 1/20

Made:: earliest 1909

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Experimental micrometer using Ayrton-Perry magnifying spring to
Science Museum Group
© The Board of Trustees of the Science Museum

Experimental micrometer using Ayrton-Perry magnifying spring to read to 1/20,000 of an inch; patented in1909.

Details

Category:: Industrial Metrology

Object Number:: 1909-81

Measurements:: 15 x 22 x 22 cm

type:: micrometer

credit:: Ayrton, A.

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