Inverse timer with non-interacting potentiometer settings
US4199808A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1977 |
| Grant date | Apr 22, 1980 |
| Priority date | — |
| Expiry date | Dec 27, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06G7/66
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An inverse timer for a process line is disclosed in which the forward end of the material is detected at a known distance from an instrument which is to be activated. The inverse timer is initiated upon forward end detection, and in a small increment of time, .DELTA.T seconds later, the instrument is activated; .DELTA.T is equal to the time required for the material to move from the point of detection to the location of the instrument, i.e., the transport time minus the reaction time of the instrument. The inverse timer includes two potentiometers for independently adjusting the transport time and the reaction times. Since the velocity of the material may vary widely during production, the inverse timer enables rapid adjustments to be made to accommodate for these new conditions without the laborious empirical determination of optimum settings of interacting potentiometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.