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Recording Apparatus for Barometers

Jules Richard, of Paris, France, Assignor to Societe Richard Freres
U.S. Patent 334,613, dated January 19, 1886

The recording device with its cylindrical drum, recording pen and arm, and linkage, with zero adjust, and spring clamp to secure chart paper to the drum.

Richard's Barograph for sale

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Recording Apparatus for Barometers

Jules Richard, of Paris, France, Assignor to Societe Richard Freres U.S. Patent 334,613, dated January 19, 1886

Jules Richard, of Paris, France, Assignor to Societe Richard Freres
U.S. Patent 334,613, dated January 19, 1886