Machine controller having optical elements within annular openings
US5451770A · kind A · utility
4Cited by
15References
9Claims
0Family size
Inventor
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16P3/20
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A solid state machine controller for actuating a machine. The machine controller requires near simultaneous interruption of two photo-optic beams by fingers from both operator hands to actuate the machine. The beams are part of switches located at opposite ends of a tubular enclosure. The photo-optic beams are located in annular openings surrounded by embossed rings to prevent beam generator and receiver soiling as well as accidental machine actuation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.