US Patent: 427,022
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| Electrical Measuring Instrument
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Patentee:
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| Edward Weston (exact or similar names) - Newark, Essex County, NJ |
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Patent Dates:
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| Applied: |
Jan. 18, 1890 |
| Granted: |
Apr. 29, 1890 |
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Patent Pictures:
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Joel Havens
OWWM Forum images of a Weston Direct-Reading Voltmeter
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Description: |
| Abstract:
My invention relates to an electrical measuring-instrument of the same general type as that described and claimed in Letters Patent No. 392,387, granted to me on the Gth dlay of November,l18SS; and it. consists more partictn- laly in certain improvements in the construction of the instrument whereby the same is rendered more efficient in operation, its manufacture simplified, and cost reduced.
(3) The principal novel features embodied in my present invention are the use of opposite- ly-acting springs in combination with the rotating coil, the construction of said springs of non-inductive or non-magnetic material, the devices for tightening or loosening said springs, the guard to prevent catching of the inner turns of said springs over the outer abutments, the arrangement of the scale-plate and its support on the pole-pieces instead of on the magnet, the construction of said plate and combination therewith of the mirror, the uniting together of the pole-pieces, coil, and scale-plate, so that these parts may be separated as a unit From the magnet, the construction and arrangement of the concentric resistance-coils, the novel form of circuit-closer, and the disposition of the circuit-connections, together with other combinations and instrumentalities, all as hereinafter more particularly set forth.
Claim:
A means of producing a field of force, a body movable in said field under the influence of an electric current, andl a body of non-inductive resilient material also in said field and interposed between said movable body' and an abutment. |
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