Apparatus for safety operating presses and the like
US4205567A · kind A · utility
5Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1978 |
| Grant date | Jun 3, 1980 |
| Priority date | — |
| Expiry date | Nov 27, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/091
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an apparatus for detecting mis-strippings in a press having a ram and upper and lower tools for punching workpieces. The apparatus comprises an electric circuit which is closed when the ram and the upper tool are in contact with each other. A relay is provided in the electric circuit and is actuated when the ram and the upper tool are brought out of contact with each other when the ram is returning from a bottom dead-center position to a top dead-center position. Also, a contact in the relay is connected with a main circuit for driving the press.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.