Patent GB-1890-12361
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Design for bent or tilted propeller.
According to the Smithsonian catalog entry cited below, MacHaffie was a British citizen living in Schenectady, New York; he also patented this invention, which he called the "citropeller", in the US. It was also envisioned for use by watercraft.
Sources
- Abridgment of patent specifications, Class 4, 1889–92, p. 10
- Screw Propellor, Patent Model, National Museum of American History, Smithsonian
| Year filed | 1890 |
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| Year granted | |
| Office | GB |
| Patent number | 12361 |
| Inventors | John MacHaffie |
| Inventor country | GB, US |
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| Applicant is inventor? | 1 |
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| Tech fields | propeller, marine, subsystem |
| Filing date | 1890-08-07 |
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| Granted? | 1 |
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| Related to aircraft? | Yes |
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| National tech categories | GB 4 propel & steer |
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| Family year | 1890 |
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