Patent Model - Improvement in Electric Annunciators

Maker and role
Albert Storer, Patentee
John Lennox, Patentee
Production date
Sep 08 1874
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Object detail

Walnut (visual), sheet iron, cast iron, brass, paint
5 7/8 x 4 1/4 x 5" (14.9 x 10.8 x 12.7cm)
Storer and Lennox's invention "relates to an improved electro-magnet annunciator; and the object thereof is to make use of the residual or permanent magnetism imparted to hard iron by a current of electricity passing through a helix, and thus do away with springs, drops, and adjustments of all kinds; and our invention consists in the combination, in an electric annunciator, of a name or number plate and an electro-magnet and armature, said armature or the core of the magnet being made of hardened iron, to hold the name or number plate in view by the force of residual magnetism." (Patent Number 154,928)
Object number
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