Digital point level switch method and apparatus

Details Digital point level switch method and apparatus Digital point level switch method and apparatus

1977-08-04

1979-02-20

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Fluent material level signalling

G01F 2300

Patent

active

041409086

ABSTRACT:
In a switching circuit for controlling the level of material in a container, a first counter accumulates pulses generated at a rate inversely related to the level of the material up to a first predetermined total. A second counter accumulates clock pulses up to a second predetermined total representing a fixed counting interval. The counters are connected in a race circuit wherein the one to reach its predetermined total first resets both counters and controls the race circuitry. The first counter sets a control circuit to indicate a low level condition or to activate an alarm, and the second counter resets the control circuit to indicate a high level condition. After the control circuit has been set by the first counter, the race circuit is responsive to a third predetermined total of the first counter, less than the first predetermined total, representing, for example, a level to which a container is to be filled. The first and third predetermined totals provide a hysteresis effect to prevent the switching circuit from "hunting" around the level at which material is to be added or an alarm condition shown.

REFERENCES:
patent: 3818232 (1974-06-01), Kirkpatrick
patent: 4015128 (1977-03-01), Della Vedova

Affiliated with

Also associated with

Rating

Digital point level switch method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital point level switch method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital point level switch method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-259729