Patent Model - Improvement in Air-Registers

Maker and role
Henry Hayden, Patentee
Production date
Dec 19 1871
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Object detail

Wood, brass
4 x 9 x 9" (10.2 x 22.9 x 22.9cm)
Hayden's patent "relates to registers for regulating the passage of air, either hot or cold, to or from a room for the purpose of heating and ventilating; and consists of a flat ring with a downwardly-projecting flange and with two or more radial arms united into a central hub or boss through which is a screw-threaded hole..." (Patent Number 121,942)
Object number
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