US3810144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low voltage warning system
Assignee: Lee Raymond Organization Inc
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Filing: 1973-01-10
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Granted: 1974-05-07
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Expires: 1993-01-10
Abstract
Abstract A Zener diode is connected in series circuit arrangement with first resistor and a diode between the positive polarity terminal of a battery and a point at ground potential. A first transistor has an input connected to a common point in the connection between the first resistor and the diode. A second transistor has an input connected to the output of the first transistor. A signal lamp is connected to the outputs of the first and second transistors.
Inventors
- 👤 L Clouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:23
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16533; G01R19/16538; G01R19/16542
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
224 words
A low voltage warning system for indicating when the battery of a vehicle is below a desired magnitude, said battery having a negative polarity terminal connected to a point at ground potential and a positive polarity terminal, said low voltage warning system comprising a first resistor; a diode having an anode connected to the first resistor and a cathode; a Zener diode connected in series circuit arrangement with the first resistor and the diode between the positive polarity terminal of the battery and a point at ground potential, the Zener diode having an anode connected to a point at ground potential and a cathode connected to the cathode of the diode; a first transistor having an input connected to a common point in the connection between the first resistor and the diode and an output; a second transistor having an input connected to the output of the first transistor and an output; a signal lamp connected to the outputs of the first and second transistors; second, third, fourth and fifth resistors, the first transistor having a base electrode connected to the common point in the connection between the first resistor and the diode via the second resistor, an emitter electrode connected to the positive polarity terminal of the battery and a collector electrode connected to a point at ground potential via the third resistor.
Claim 2
Dependent Claim
224 words
A low voltage warning system for indicating when the battery of a vehicle is below a desired magnitude, said battery having a negative polarity terminal connected to a point at ground potential and a positive polarity terminal, said low voltage warning system comprising a first resistor; a diode having an anode connected to the first resistor and a cathode; a Zener diode connected in series circuit arrangement with the first resistor and the diode between the positive polarity terminal of the battery and a point at ground potential, the Zener diode having an anode connected to a point at ground potential and a cathode connected to the cathode of the diode; a first transistor having an input connected to a common point in the connection between the first resistor and the diode and an output; a second transistor having an input connected to the output of the first transistor and an output; a signal lamp connected to the outputs of the first and second transistors; second, third, fourth and fifth resistors, the first transistor having a base electrode connected to the common point in the connection between the first resistor and the diode via the second resistor, an emitter electrode connected to the positive polarity terminal of the battery and a collector electrode connected to a point at ground potential via the third resistor.
Claim 3
Dependent Claim
76 words
A low voltage warning system as claimed in claim 1, wherein the second transistor has a base electrode connected to the collector electrode of the first transistor via the fourth resistor, an emitter electrode connected to the positive polarity terminal of the battery and a collector electrode connected to an electrode of the lamp via the fifth resistor, the lamp having another electrode connected to the collector electrode of the first transistor via the third resistor.
References Cited (Backward Citations)
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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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |