Method and apparatus for monitoring an electrically actuated tool
US3962694A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1975 |
| Grant date | Jun 8, 1976 |
| Priority date | — |
| Expiry date | Mar 6, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H11/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for monitoring an electrically actuated tool. The current flowing in the tool circuit is sampled and converted to an analog voltage signal that is proportional to the maximum stress level output of the tool. This converted signal may be displayed and recorded as desired. The converted analog voltage signal is compared with signals representing the current flow that will produce the highest and lowest acceptable stress levels delivered by the tool and a logic control signal is produced if the analog voltage signal is outside the acceptable range. The logic control signal is used to prevent recycling of the tool so that subsequent tool operation is not possible until corrective procedures are instituted. Further, the logic control signal may be used to activate audio and visual indicators. Moreover, the logic control signal can be used to introduce a load into the total circuit to modify the current delivered to the tool and therefore change its output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.