Rotation speed measuring machine for flying globe
US5798833A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Jun 18, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/50
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A rotation speed measuring machine for a flying globe is formed of a light projecting device 10 projecting light on a measurement conducting area A which is a space including an expected flying route of a flying globe B after the globe has been hit at a hitting position, a light receiving device 20 which receives reflection light from the flying globe flying in the measurement conducting area A and which outputs a signal according to the fluctuation of the amount of reflected light, and a rotational speed detecting means 30 detecting the rotational speed of the flying globe B based on the output signal from the light receiving device 20 in order to measure the rotational speed of the flying globe B by putting a mark M having a light reflectance rate different from the reflectance rate of the surface texture on a part of the surface of the flying globe B and by detecting the amount of reflected light from the mark. The amount of spin of the flying globe B is measured at around the highest point of the flight locus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.