Game method and apparatus for sensing the position of an object with respect to its receptacle
US4102532A · kind A · utility
6Cited by
14References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1976 |
| Grant date | Jul 25, 1978 |
| Priority date | — |
| Expiry date | Nov 4, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41G3/2627
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An electrical circuit for sensing the position of an object with respect to its receptacle. Within the receptacle is mounted a light emitting diode (LED) that generates coded pulses of light. The pulses are sensed by a photodetector mounted on the object. The circuit further includes a clock, gates and a D-flip-flop that together determine whether the photodetector is sensing the coded pulses from the light emitting diode. The light emitting diode and the photodetector are positioned such that the photodetector only senses the coded pulses when the object is located within the receptacle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.