Patent GB-1910-23759
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"Bell-shaped" propellers:
The propulsive effect of the bells is due to the fact that while moving, mouth forwards, in the direction opposed to the direction of travel (horizontal or vertical) the bells compress a considerable body of air, which exerts a motive thrust, whereas when moving in the opposite direction the compression of air is slight, and does not neutralize the thrust previously imparted.
- Inventor location: Hauptstrasse 31, Holzweissig, near Bitterfeld, Germany
- Inventor occupation: "no occupation"
Sources
| Year filed | |
|---|---|
| Year granted | 1910 |
| Office | GB |
| Patent number | 23759 |
| Inventors | Reinhold Bullmann |
| Inventor country | DE |
| Applicant person | |
| Applicant firm | |
| Applicant type | INDIV |
| Applicant is inventor? | Yes |
| Original title | An Improved Navigable Balloon |
| English title | Navigable Balloon |
| Tech fields | LTA, navigation, stability, frame, rudder, car, landing, springs, propeller, propulsion, photography, communications, military, brake, passenger, ballonet |
| Filing date | October 13, 1910 |
| Full specification filed date | |
| Application number | 191023759D |
| Grant date | |
| Granted? | Yes |
| Publication date | May 4, 1911 |
| Supplementary to patent | |
| Related to aircraft? | Yes |
| Serial number | |
| Patent agent | Herbert Haddan & Co. |
| Assigned to | |
| National tech categories | |
| IPCs | IPC B64B1/58 |
| CPCs | CPC B64B1/58 |
| Family year | 1910 |
| First filing? | Yes |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | 23606306 |
| INPADOC family ID | 11098259 |
| Number of text pages | 4 |
| Number of diagram pages | 1 |
| Number of figures | 8 |
| Number of claims | 14 |
