Lot n° 467
Estimation :
150 - 200
EUR
Result without fees
Result
: 200EUR
HERARD, J.: Rotary wing machine with retractable... - Lot 467 - Oger - Blanchet
HERARD, J.: Rotary wing machine with retractable blades, built by Mr. Grosley in 1888.
Photograph mounted on cardboard with ink caption.
21 x 16 cm.
Herard tested in large size a wheel with constantly vertical frames, equipped with a series of Parisian blades opening during one part of the rotation and closing during the other, under the action of a cam.
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