Patent GB-1911-20866
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- From the abstract on google: "20,866. Forrest, G. M. Sept. 21. Aerial machines without aerostats; planes, arrangement of; propelling.-In a monoplane having tandem planes A secured to the upper part of the machine, two large screw propellers C are arranged between the planes and a vertical keel plane D connects the planes. The motor is arranged in the car B to give a low centre of gravity. When the motor stops, the screw propellers are prevented from rotating and serve, along with the keel plane and the low centre of gravity, to cause the machine to descend as a parachute."
- Inference: the invention's safety feature is that the airplane is intended to glide well if its engine stops; though we see the word parachute in the patent text, I think it's not in any sense an invention related to parachutes, so I don't classify it that way; it's a safety invention using glider designs, not a glider or parachute invention
- Tech class: CPC B64C39/08: Aircraft not otherwise provided for having multiple wings
- Inventor occupation and location: Photographer; of Danacre Road, Brechin
- Confusingly, the "completed" spec is signed on April 28, but the patent office records the completed specification as having been filed on March 20th. The inventor got an exception, or made a mistake, or something. It's not substantively important but may illuminate the process. example
Sources
- Original patent document and bibliography entry on espacenet
- on google patents
| Year filed | 1911 |
|---|---|
| Year granted | 1911 |
| Office | GB |
| Patent number | 20866 |
| Inventors | George Morris Forrest |
| Inventor country | GB |
| Applicant person | George Morris Forrest |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | 1 |
| Original title | An Improved Aerial Machine |
| English title | An Improved Aerial Machine |
| Tech fields | tandem, safety |
| Filing date | 1911-09-21 |
| Full specification filed date | 1912-03-20 |
| Application number | 191120866D |
| Grant date | 1912-06-06 |
| Granted? | 1 |
| Publication date | |
| Supplementary to patent | |
| Related to aircraft? | 1 |
| Serial number | |
| Patent agent | |
| Assigned to | |
| National tech categories | |
| IPCs | IPC B64C39/00 |
| CPCs | CPC B64C39/08, CPC B64C2700/6295 |
| Family year | 1911 |
| First filing? | 1 |
| Cites these patents | |
| Citations from after 1930 | 0 |
| Application ID | 23622031 |
| INPADOC family ID | 11111917 |
| Number of text pages | 2 |
| Number of diagram pages | 2 |
| Number of figures | 4 |
| Number of claims | 2 |
