Patent US-1914-1274622
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Aerial speedometer (measuring horizontal velocity) using a telescope to sight a particular point on the ground. The speed required to keep the object in sight, combined with a knowledge of altitude from barometer, can be used to calculate the velocity. This method is functionally the same as that disclosed in Patent US-1913-1123253, albeit with a different and perhaps more sophisticated apparatus.
Sources
- Patent 1274622 document and bibliographic info on espacenet
- Patent 1274622 at google patents
- Inventor location: Brooklyn, New York City
| Year filed | 1914 |
|---|---|
| Year granted | 1918 |
| Office | US |
| Patent number | 1274622 |
| Inventors | Elmer A. Sperry |
| Inventor country | US |
| Applicant person | |
| Applicant firm | Sperry Gyroscope Company |
| Applicant type | COMPANY+INDIV |
| Applicant is inventor? | No |
| Original title | Speed and Direction Indicator for Aircraft |
| English title | Speed and Direction Indicator for Aircraft |
| Tech fields | speedometer, instrument, subsystem, method, navigation |
| Filing date | 1914/05/12 |
| Full specification filed date | |
| Application number | |
| Grant date | 1918/08/06 |
| Granted? | Yes |
| Publication date | |
| Supplementary to patent | |
| Related to aircraft? | Yes |
| Serial number | 828060 |
| Patent agent | Herbert H. Thompson |
| Assigned to | Sperry Gyroscope Company |
| National tech categories | UPSC 33/232 |
| IPCs | IPC G01P3/36 |
| CPCs | CPC G01P3/36 |
| Family year | 1914 |
| First filing? | No |
| Cites these patents | |
| Citations from after 1930 | |
| Application ID | |
| INPADOC family ID | |
| Number of text pages | 6 |
| Number of diagram pages | 2 |
| Number of figures | 8 |
| Number of claims | 30 |
