Patent Model - Improvement in Slate-Washers
Maker and role
Frederick Porter (b.1849), Patentee
Production date
Aug 15 1871
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Object detail
Media/Materials
Wood, sponge, iron
Measurements
7 1/2 x 6" (19.1 x 15.2cm)
Description
Porter's patent "has relation to an improved slate and black-board cleaner, which consists of a water-cup holding a sponge, and provided with a spring-valve arranged and operating in such a manner that the same sponge may be used as a washer or as a drier, as may be desired." (Patent Number 118,150)
Collection
Object number
2015.14.1343a,b
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