US3911360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable time delay voltage dropout detector
Assignee: Individual
•
Filing: 1974-02-11
•
Granted: 1975-10-07
•
Expires: 1994-02-11
Abstract
Abstract A voltage monitoring system includes a comparator circuit having one input connected to a first reference voltage source and a second input connected through a timing circuit to the voltage to be monitored. An output of the comparator is connected to a set input of a flip-flop having its output connected to a light emitting diode indicator. A second comparator has one input connected to a second reference voltage source and a second input connected through a reset switch to the voltage being monitored. An output of the second comparator is connected to the reset of the flip-flop.
Inventors
- 👤 Gene A Kimzey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:57
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16533; G01R19/16538
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
199 words
A circuit for monitoring the voltage level of a voltage source, comprising: a. a first comparator circuit, b. a first voltage divider circuit connected between the voltage source and a first input of said first comparator circuit, c. circuit means forming a source of reference voltage for supplying a reference voltage to a second input of said first comparator circuit, d. an indicator connected to an output of said first comparator circuit, e. a time-delay circuit connected between said voltage divider circuit and the first input of said first comparator circuit, f. means for storing the output of said first comparator circuit and connected between said first comparator circuit and said indicator, said storing means including a flipflop circuit having a first input connected to the output of said first comparator circuit and an output connected to said indicator, g. a second comparator circuit, and h. a switch connected between the voltage source and a first input of said second comparator circuit, said circuit means being connected to a second input of said second comparator circuit for supplying the reference voltage thereto and an output of said second comparator circuit being connected to a second input of said flip-flop.
Claim 2
Dependent Claim
199 words
A circuit for monitoring the voltage level of a voltage source, comprising: a. a first comparator circuit, b. a first voltage divider circuit connected between the voltage source and a first input of said first comparator circuit, c. circuit means forming a source of reference voltage for supplying a reference voltage to a second input of said first comparator circuit, d. an indicator connected to an output of said first comparator circuit, e. a time-delay circuit connected between said voltage divider circuit and the first input of said first comparator circuit, f. means for storing the output of said first comparator circuit and connected between said first comparator circuit and said indicator, said storing means including a flipflop circuit having a first input connected to the output of said first comparator circuit and an output connected to said indicator, g. a second comparator circuit, and h. a switch connected between the voltage source and a first input of said second comparator circuit, said circuit means being connected to a second input of said second comparator circuit for supplying the reference voltage thereto and an output of said second comparator circuit being connected to a second input of said flip-flop.
Claim 3
Dependent Claim
83 words
A circuit as defined in claim 1, wherein said circuit means includes a second voltage divider circuit connected between the voltage source and ground potential, a first tap of said second voltage divider circuit being connected to the second input of said first comparator circuit, a second tap of said second voltage divider circuit being connected to the second input of said second comparator circuit, and a Zener diode connected between a third tap of said second voltage divider circuit and ground potential.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |