US3746981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical fault monitoring with memory
Assignee: Collins Radio Co
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Filing: 1971-09-24
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Granted: 1973-07-17
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Expires: 1991-09-24
Abstract
Abstract Means for monitoring electronic equipment and detecting faults including memory means whereby transient or intermittent faults may be identified and corrected after an interval of time.
Inventors
- 👤 J Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:12
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0751; G06F11/0754
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
Means for monitoring voltages and detecting faults within electronic equipment comprising a plurality of fault sensors, means for connecting the inputs of said sensors to monitor points within said equipment, storage register means, means connecting the outputs of said sensors to the inputs of said register means, first gate means, means connecting the outputs of said register means to the inputs of said first gate means, second gate means, means connecting the output of said first gate means to a first input to said second gate means, reset means connected to a second input to said second gate means, and means connecting the output of said second gate means to a clock input to said register means whereby a monitored fault locks said register means and actuates an alarm.
Claim 2
Dependent Claim
129 words
Means for monitoring voltages and detecting faults within electronic equipment comprising a plurality of fault sensors, means for connecting the inputs of said sensors to monitor points within said equipment, storage register means, means connecting the outputs of said sensors to the inputs of said register means, first gate means, means connecting the outputs of said register means to the inputs of said first gate means, second gate means, means connecting the output of said first gate means to a first input to said second gate means, reset means connected to a second input to said second gate means, and means connecting the output of said second gate means to a clock input to said register means whereby a monitored fault locks said register means and actuates an alarm.
Claim 3
Dependent Claim
26 words
Monitor means as defined by claim 1 wherein said register means comprises a plurality of registers and said first gate means comprises a plurality of gates.
Claim 4
Dependent Claim
17 words
Monitor means as defined by claim 2 wherein said first and second gate means includes NAND gates.
Claim 5
Dependent Claim
56 words
Monitor means as defined by claim 1 wherein said fault sensors include at least one sensor comprising a voltage divider for connection between a reference voltage level and a monitored voltage, gate means, means connecting said voltage divider to the input to said gate means, and diode means connected between said input and a voltage level.
Claim 6
Dependent Claim
14 words
Monitor means as defined by claim 4 wherein said gate means is an inverter.
Claim 7
Dependent Claim
16 words
Monitor means as defined by claim 4 wherein said gate means is a Schmitt trigger circuit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |