Photoelectric switch having pulse driver circuitry
US5026978A · kind A · utility
14Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1990 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Jan 22, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/78
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A light projecting circuit of a photoelectric switch includes a light projecting element (2), a driver circuit (1, 3) for driving the light projecting element by use of pulses, and a change-over switch (4) for increasing or for decreasing an amount of light emitted from the light projecting element. With this provision, in an operation to adjust optical axes, the change-over switch can be used to increase the amount of the emitted light. Consequently, the position of the projected light beam can be easily confirmed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.