Flow line counter incorporating programmed reversal circuitry
US4081661A · kind A · utility
6Cited by
5References
6Claims
0Family size
Inventor
Key dates
| Filing date | Sep 13, 1976 |
| Grant date | Mar 28, 1978 |
| Priority date | — |
| Expiry date | Sep 13, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06M7/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
For counting objects moving along a line of flow in a forward or reverse direction, a system utilizes upstream and downstream sensors and a logic subsystem to provide pulse signals to a counter. The logic subsystem produces an upcount or downcount signal only after a sequence of system states is consecutively achieved. Before a count signal is produced an intervening state-confirming signal is required. When such confirming signal is followed by a count-producing signal the logic subsystem automatically resets to a reverse flow condition. Thus, neither vibrations nor reversal of object flow at any point will cause a false count.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.