US3835362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defective battery condition/charging system warning device
Assignee: Safe Flight Instrument LLC
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Filing: 1973-08-09
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Granted: 1974-09-10
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Expires: 1993-08-09
Abstract
Abstract A device which warns when a nickel-cadmium storage battery is defective or when the system for charging the battery is operating improperly. The device senses charging current flow in a battery cable and generates a warning signal when a predetermined level of charging current is exceeded for a predetermined length of time.
Inventors
- 👤 L Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:02
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/36; G01R31/382; H; H02; H02J; H02J7/00; H02J7/02; H02J7/60; H02J7/62; H02J7/80; H02J7/90; H02J7/94; H02J7/953; G01R31/3644; G01R31/3646; Y; Y10; Y10S; Y10S320/00; Y10S320/13; Y10S320/18; Y10S320/19
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
464 words
A defective battery condition/charging system warning device for use in conjunction with a battery cable, said device comprising: A. current sensor means responsive to current flowing in the cable, B. polarity and current level detector means responsive to the output of said sensor means, said detector means i. differentiating between a battery charging mode of flow of current in the cable and a battery discharge mode of flow of current in the cable ii. when the current flow is in a discharge mode sensing the presence of a level of flow in excess of a predetermined discharge level, a) said predetermined discharge level being a level indicative of a significant discharge, iii. when the current flow is in a charging mode sensing the presence of a level of flow in excess of a first predetermined charging level, a. said first predetermined charging level being a maximum acceptable level for the battery after a first predetermined period of battery charging time initiating with the commencement of a charging mode of flow of current in the cable at at least said predetermined level following a significant discharge level of flow of current, and iv. when the current flow is in a charging mode after a second predetermined period of battery charging time which terminates after the first predetermined period of battery charging time sensing a level of flow in excess of a second Predetermined charging level, a. said second predetermined charging level being lower than said first predetermined charging level, b. the second predetermined period of battery charging time initiating with the commencement of a charging mode of current flow in the cable at at least said second predetermined charging level following a significant discharge level of flow of current, c. said second predetermined period of battery charging time being longer than said first predetermined period of battery charging time, d. said second predetermined level of charging current flow in the cable being a maximum acceptable level for the battery after said second predetermined period of battery charging time, C. first timing means for measuring said first predetermined period of battery charging time, i. said first timing means being disabled upon the detector means sensing a discharge mode of current flow in the cable at at least said first predetermined discharge level, D. second timing means for measuring said second predetermined period of battery charging time, i. said second timing means being disabled upon the detector means sensing a discharge mode of current flow in the cable at at least said second predetermined discharge level, and E. a warning signal energizeable when the detector means senses a charging flow of current in the cable at at least said first or said second predetermined charging levels at the expiration of either of said predetermined periods of time.
Claim 2
Dependent Claim
464 words
A defective battery condition/charging system warning device for use in conjunction with a battery cable, said device comprising: A. current sensor means responsive to current flowing in the cable, B. polarity and current level detector means responsive to the output of said sensor means, said detector means i. differentiating between a battery charging mode of flow of current in the cable and a battery discharge mode of flow of current in the cable ii. when the current flow is in a discharge mode sensing the presence of a level of flow in excess of a predetermined discharge level, a) said predetermined discharge level being a level indicative of a significant discharge, iii. when the current flow is in a charging mode sensing the presence of a level of flow in excess of a first predetermined charging level, a. said first predetermined charging level being a maximum acceptable level for the battery after a first predetermined period of battery charging time initiating with the commencement of a charging mode of flow of current in the cable at at least said predetermined level following a significant discharge level of flow of current, and iv. when the current flow is in a charging mode after a second predetermined period of battery charging time which terminates after the first predetermined period of battery charging time sensing a level of flow in excess of a second Predetermined charging level, a. said second predetermined charging level being lower than said first predetermined charging level, b. the second predetermined period of battery charging time initiating with the commencement of a charging mode of current flow in the cable at at least said second predetermined charging level following a significant discharge level of flow of current, c. said second predetermined period of battery charging time being longer than said first predetermined period of battery charging time, d. said second predetermined level of charging current flow in the cable being a maximum acceptable level for the battery after said second predetermined period of battery charging time, C. first timing means for measuring said first predetermined period of battery charging time, i. said first timing means being disabled upon the detector means sensing a discharge mode of current flow in the cable at at least said first predetermined discharge level, D. second timing means for measuring said second predetermined period of battery charging time, i. said second timing means being disabled upon the detector means sensing a discharge mode of current flow in the cable at at least said second predetermined discharge level, and E. a warning signal energizeable when the detector means senses a charging flow of current in the cable at at least said first or said second predetermined charging levels at the expiration of either of said predetermined periods of time.
Claim 3
Dependent Claim
18 words
A device as set forth in claim 1 wherein the detector means is physically free of the cable.
Claim 4
Dependent Claim
21 words
A device as set forth in claim 1 wherein the detector means is responsive to the electromagnetic field of the cable.
Claim 5
Dependent Claim
30 words
A device as set forth in claim 3 wherein the detector means includes a magnetic body in said electromagnetic field and means responsive to the flux density in said body.
Claim 6
Dependent Claim
16 words
A device as set forth in claim 4 wherein the body is made of soft iron.
Claim 7
Dependent Claim
14 words
A device as set forth in claim 5 wherein the body encircles the cable.
Claim 8
Dependent Claim
73 words
A device as set forth in claim 6 wherein the body has a gap, wherein a Hall crystal is disposed in the gap with two of its faces substantially parallel to the sides of the gap, wherein means is provided to supply potential to two other faces of the Hall crystal and wherein an output signal is provided across two further faces of the Hall crystal, said output signal controlling said warning signal.
Claim 9
Dependent Claim
20 words
A device as set forth in claim 1 wherein the both timing means includes logic for energizing the warning signal.
Claim 10
Dependent Claim
33 words
A device as set forth in claim 1 furhter including a power source and wherein means is provided to ready the device for operation upon connection of the power source to the device.
Claim 11
Dependent Claim
44 words
A device as set forth in claim 1 wherein means is included to energize the warning signal when the detector means senses a charging flow of current in the cable at a low predetermined charging level after the both timing means have timed out.
Claim 12
Dependent Claim
44 words
A device as set forth in claim 1 which further includes time delay means for inhibiting the initiation for a preselected time of the commencement of timing for a charging mode of flow of current following a brief discharge mode of flow of current.
Claim 13
Dependent Claim
24 words
A device as set forth in claim 1 which further includes time delay means to disconnect the battery following energization of the warning signal.
Claim 14
Dependent Claim
290 words
A defective battery condition/charging system warning device for use in conjunction with a battery cable, said device comprising: A. current sensor means responsive to current flowing in the cable, B. polarity and current level detector means responsive to the output of said sensor means, said detector means i. differentiating between a battery charging mode of flow of current in the cable and a battery discharge mode of flow of current in the cable ii. when the current flow is in a discharge mode sensing the presence of a leVel of flow in excess of a predetermined discharge level and iii. when the current flow is in a charging mode sensing the presence of a level of flow in excess of a predetermined charging level, a. said predetermined discharge level being a level indicative of a significant discharge, b. said predetermined charging level being a maximum acceptable level for the battery after a predetermined period of battery charging time initiating with the commencement of a charging mode of flow of current in the cable at at least said predetermined level following a significant discharge level of flow of current, C. timing means for measuring said predetermined period of battery charging time, i. said timing means being disabled upon the detector means sensing a discharge mode of current flow in the cable at at least said predetermined discharge level, D. a warning signal energizeable when the detector means senses a charging flow of current in the cable at at least said predetermined charging level at the expiration of said predetermined period of time, and E. time delay means to inhibit energization of the warning signal for a preselected period of time after the expiration of the predetermined period of battery charging time.
Claim 15
Dependent Claim
290 words
A defective battery condition/charging system warning device for use in conjunction with a battery cable, said device comprising: A. current sensor means responsive to current flowing in the cable, B. polarity and current level detector means responsive to the output of said sensor means, said detector means i. differentiating between a battery charging mode of flow of current in the cable and a battery discharge mode of flow of current in the cable ii. when the current flow is in a discharge mode sensing the presence of a leVel of flow in excess of a predetermined discharge level and iii. when the current flow is in a charging mode sensing the presence of a level of flow in excess of a predetermined charging level, a. said predetermined discharge level being a level indicative of a significant discharge, b. said predetermined charging level being a maximum acceptable level for the battery after a predetermined period of battery charging time initiating with the commencement of a charging mode of flow of current in the cable at at least said predetermined level following a significant discharge level of flow of current, C. timing means for measuring said predetermined period of battery charging time, i. said timing means being disabled upon the detector means sensing a discharge mode of current flow in the cable at at least said predetermined discharge level, D. a warning signal energizeable when the detector means senses a charging flow of current in the cable at at least said predetermined charging level at the expiration of said predetermined period of time, and E. time delay means to inhibit energization of the warning signal for a preselected period of time after the expiration of the predetermined period of battery charging time.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |