Method and apparatus for coordinating the speeds of motions
US4308489A · kind A · utility
25Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Jan 30, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P5/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for maintaining predetermined speed ratios between at least two motions are described. The speeds of the motive power sources for the motions are controlled by signals having values proportional to the ratio of those speeds, and in the alternative, if lower in value, reference signal which may be generated by an operator. The invention is described in connection with its application in a power shovel where it controls the ratio of crowd speed to hoist speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.