Patent Model - Improvement in Electric Telegraphs
Maker and role
Robert Boyle, Patentee
Production date
Nov 02 1875
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Object detail
Media/Materials
Wood, brass, copper, steel
Measurements
4 1/8 x 8 5/8 x 6 5/16" (10.5 x 21.9 x 16cm)
Description
Boyle's invention "relates to that class of electric telegraphs in which induced currents are used in addition to battery-currents, and which are intended particularly for chemical writing." (Patent Number 169,513)
Collection
Object number
2015.14.2053a,b
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