61.—Wheel and axle comined with a screw.details

[Picture: 61.—Wheel and axle comined with a screw.]
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61.—Wheel and axle comined with a screw.

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Out of copyright (called public domain in the USA), hence royalty-free stock image for all purposes usage credit requested
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Notes:

A wheel and axle may be combined with a screw, as shewn in the contrivance of fig. 61. When the handle is turned, the screw-thread on its axle sends the cog-wheel forward one tooth for every revolution. Such a screw, which itself does not advance in a nute, but which merely rotates in ordinary bearings, is called an ‘endless’ screw. (pp. 139, 140)

Dimensions:

63 x 65mm (2.5 x 2.6 inches)

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61-Wheel-axle-and-screw-q75-482x500.jpg

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1600 dots per inch

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