Patent Model - Improvement in Safety-Valves
Maker and role
Thomas Shaw (b.1838, d.1901), Patentee
Production date
Jul 24 1877
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Object detail
Media/Materials
Wood
Measurements
3 x 4" (7.6 x 10.2cm)
1 1/8 x 3" (2.9 x 7.6cm)
1 1/8 x 3" (2.9 x 7.6cm)
Description
Shaw's invention "consists in the application of slight frictional resistance to the valve... The object of the invention is to prevent that disagreeable hammering sound that frequently occurs in the class of safety-valves known as 'pop-valves.'" (Patent Number 193,558)
Collection
Object number
2015.14.2425a-c
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