US Patent: 186,718
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| Improvement in steam-whistle
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Patentee:
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| John Einig (exact or similar names) - Jacksonville, FL |
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Patent Dates:
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| Applied: |
Nov. 25, 1876 |
| Granted: |
Jan. 30, 1877 |
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Jeff Joslin
Vintage Machinery entry for Crosby Steam Gage & Valve Co.
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Description: |
| This whistle produces three simultaneous tones via three mouths and three resonator compartments but contained within the volume and form factor of a regular single-tone whistle. |
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