Device for controlling the load of a lifting appliance
US4054055A · kind A · utility
4Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1976 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Aug 6, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/0071
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides a device for indicating the maximum permissible loads of a lifting appliance wherein a series of potentiometers are adjusted according to the variation of one parameter and control another potentiometer which is adjusted according to a second parameter, and means for assigning reference voltages to the series of potentiometers which means comprise, for each tapping, a series of polarisation circuits in parallel, each circuit providing a regulated voltage and controlled by a switch defining the instantaneous position of operation and simultaneously controlling all the polarisation circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.