US Patent: 228,763
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| Dynamo-Electrical Machine
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Patentee:
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| Nathaniel S. Keith (exact or similar names) - New York, NY |
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Patent Dates:
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| Applied: |
Apr. 23, 1879 |
| Granted: |
Jun. 15, 1880 |
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Joel Havens
"Vintage Machinery" entry for Electrical Engineering Co.
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Description: |
| Abstract:
My improvements relate, primarily, to the forms and arrangements of parts of machines used for generating currents of electricity which embody field-of-force electro-magnets, between the poles of which are rotated cores of iron surrounded by coils of wire, which cores and coils associated are called armatures in which armature-coils and in the coils of the field-of-force electromagnets currents of electricity are generated by mutual induction.
They are also applicable, in part, to machines using permanent magnets for the field-of-force. More specifically, my improvements are First, improved form of the pole-faces of the field-of-force magnets of dynamo-electric and of magneto-electric machines, and consequent change in the shape and dimensions of the spaces, called by some the fields-of-force, in which the armatures are rotated.
Claim:
In magneto-electric machines and dynamo-electric machines, magnet pole-faces which are arcs of circles greater than the circles described by rotating their armature as, and whose radii spring from centers removed from the centers of the axes of the armatures |
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