Patent Model - Improvement in Self-Adjusting Telegraphic Relays
Maker and role
Lewis Reynolds, Patentee
Sep 29 1868
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Wood, copper. iron
3 1/2 x 6 x 3 1/2" (8.9 x 15.2 x 8.9cm)
Reynolds's patent improvements include the "double electro-magnet, or two electro-magnets, placed in a helix or helices, with their like poles near each other, and attachment to armature or armature-bar of common relay, so that their repulsion will counteract, or nearly counteract, the attraction of armature of common relay to its own magnet." (Patent Number 82,639)
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