Patent Model - Improvement in Repeaters for Duplex Telegraphs

Maker and role
Joseph Stearns (b.1831, d.1895), Patentee
Production date
Jan 14 1873
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Object detail

Wood, brass, steel, paper
9 1/2 x 11 3/4 x 2" (24.1 x 29.8 x 5.1cm)
Stearns's apparatus "is known as a repeater or translator; and my invention consists in an improved form, which repeats simultaneously to each station signals arriving from opposite stations on the same line-wire at the same time." Prior to this patent Stearns patented 78,547 and 78,548, "apparatus for telegraphing in opposite directions on the same line-wire at the same time... and in my present invention I make use of this apparatus, so connecting two of them together at one station that they form a repeater." (Patent Number 134,776)
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