Part of a compression pump use

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Part of a compression pump used by James Joule, c.1860. The purpose of this pump was to overcome' the abrasion which takes place when metal rubs against metal, without an 'intermediate lubricator', by eliminating the usual packing and increasing the depth of the piston.

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Scientific Instruments & Research
Object Number:
compression pump
Gift of University of Manchester Institute of Science & Technology

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