Patent Model - Improved Magnetic Steam-Gage

Maker and role
Joshua Lowe (b.1811, d.Post 1868), Patentee
Joshua Lowe (b.1811, d.Post 1868), Assignee
Daniel Barnum, Assignee
Production date
Jul 06 1858
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Object detail

Brass, iron, glass
7 x 9 1/2 x 1 3/4" (17.8 x 24.1 x 4.4cm)
Lowe's patent is "a new and useful improvement in the tight-chambered compressed-air and mercury pressure gage, as well as in the mercury vacuum-gage, by combining therewith a self-adjusting or floating magnet, a magnetic needle, and a dial or index plate, thus producing magnetic pressure and vacuum gages which mark the amount of pressure or of vacuum by the seen indications of a magnetic needle..." (Patent Number 20,851)
Object number
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