Patent Model - Improvement in Paddle-Wheels
Maker and role
Addison Fletcher, Patentee
Production date
Dec 23 1873
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Object detail
Media/Materials
Brass, wood
Measurements
12 x 9 1/8 x 8" (30.5 x 23.2 x 20.3cm)
Description
Fletcher's patent identified the problem of what he was solving as: "With the buckets heretofore used, there is much loss of power, as also of propelling effect, the first owing to the angle at which they enter and emerge from the water, causing, respectively, a depression and lift of that element; and secondly, from the loss of hold upon the water when submerged, in a vertical position, by flow over the upper edge of the bucket." His objective remedies "at least in a great measure, these defects; and it consists in constructing the buckets so that their cross-sections shall correspond, or nearly so, with the outline of a parabola..." (Patent Number 145,857)
Collection
Object number
2015.14.1676a,b
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