Patent US3838327A successfully refreshed from Google Patents.
US3838327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery powered equipment
Assignee: Yuasa Corp
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Filing: 1973-08-20
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Granted: 1974-09-24
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Expires: 1993-08-20
Abstract
Abstract Portable battery powered equipment capable of being charged from an automobile accessory terminal, such as a cigarette lighter jack, is provided with a main relay to open and close the selfcontained charging circuit which is designed to be switched ON at a preset voltage. A circuit includes a switching member and a resistor connected in series to one another and connected in parallel with the coil of a main relay. Variable resistors are connected in parallel with or disconnected with the resistor depending on the ON-OFF operation of the main relay. The charging operates such that an electric current flowing to the coil of the main relay is controlled to effect the OFF operation of the main relay when the battery cannot be substantially charged from an alternator or other external AC source.
Inventors
- 👤 S Uemichi
- 👤 K Miyauchi
- 👤 S Nakao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:42
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/14; H02J7/1423; H02J7/60; H02J7/663
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
251 words
Battery charging apparatus comprising: a main relay for actuating and de-actuating said apparatus at respective pre-set ON and OFF voltages of a charging source; said ON voltage is greater than said OFF voltage; a switching member for deactuating said main relay at said OFF voltage; a circuit for controlling said switching member and including a first resistor and a second resistor connected in parallel with or cut-off from said first resistor by the ON-OFF operation of said main relay for regulating said switching member to effect the OFF operation of said main relay, said switching member includes a transistor having a base connected to said first resistor, a collector connected to the coil of said main relay, said main relay includes ON and OFF contact members, and said second resistor is connected to said ON contact member, whereby said first resistor and said second resistor are connected in parallel when said main relay is ON and when said main relay is OFF said second resistor is disconnected; said transistor is biased so that the coil of said main relay is actuated at said set ON voltage and the coil of said main relay remains actuated with the voltage of said charging source less than said set ON voltage, and said transistor is shut off with the voltage of said charging source voltage at said OFF voltage by the current through said parallel resistors when said charging source has a voltage less than said set voltage, whereby said main relay is de-actuated.
Claim 2
Dependent Claim
251 words
Battery charging apparatus comprising: a main relay for actuating and de-actuating said apparatus at respective pre-set ON and OFF voltages of a charging source; said ON voltage is greater than said OFF voltage; a switching member for deactuating said main relay at said OFF voltage; a circuit for controlling said switching member and including a first resistor and a second resistor connected in parallel with or cut-off from said first resistor by the ON-OFF operation of said main relay for regulating said switching member to effect the OFF operation of said main relay, said switching member includes a transistor having a base connected to said first resistor, a collector connected to the coil of said main relay, said main relay includes ON and OFF contact members, and said second resistor is connected to said ON contact member, whereby said first resistor and said second resistor are connected in parallel when said main relay is ON and when said main relay is OFF said second resistor is disconnected; said transistor is biased so that the coil of said main relay is actuated at said set ON voltage and the coil of said main relay remains actuated with the voltage of said charging source less than said set ON voltage, and said transistor is shut off with the voltage of said charging source voltage at said OFF voltage by the current through said parallel resistors when said charging source has a voltage less than said set voltage, whereby said main relay is de-actuated.
Claim 3
Dependent Claim
257 words
Battery charging apparatus comprising: a main relay for actuating and de-actuating said apparatuS at respective pre-set ON and OFF voltages of a charging source; said ON voltage is greater than said OFF voltage; a switching member for de-actuating said main relay at said OFF voltage; a circuit for controlling said switching member and including a first resistor and a second resistor connected in parallel with or cut-off from said first resistor by the ON-OFF operation of said main relay for regulating said switching member to effect the OFF operation of said main relay, said switching member is an auxiliary relay having a contact member and coil, said coil is connected in series with said first resistor, said contact member is connected directly to the coil of said main relay; said main relay includes ON and OFF contact members, and said second resistor is connected to said OFF contact member, whereby said first resistor and said second resistor are connected in parallel when said main relay is OFF and when said main relay is ON said second resistor is disconnected; said auxiliary relay is ON when the voltage from the charging source reaches a set voltage proper for charging said auxiliary relay, said auxiliary relay switches said main relay ON when the voltage from charging source reaches a set voltage proper for charging said main relay, and said auxiliary relay is switched OFF by the current through said first resistor when the charging source has a voltage less than said set voltage, whereby said main relay is de-actuated.
Claim 4
Dependent Claim
257 words
Battery charging apparatus comprising: a main relay for actuating and de-actuating said apparatuS at respective pre-set ON and OFF voltages of a charging source; said ON voltage is greater than said OFF voltage; a switching member for de-actuating said main relay at said OFF voltage; a circuit for controlling said switching member and including a first resistor and a second resistor connected in parallel with or cut-off from said first resistor by the ON-OFF operation of said main relay for regulating said switching member to effect the OFF operation of said main relay, said switching member is an auxiliary relay having a contact member and coil, said coil is connected in series with said first resistor, said contact member is connected directly to the coil of said main relay; said main relay includes ON and OFF contact members, and said second resistor is connected to said OFF contact member, whereby said first resistor and said second resistor are connected in parallel when said main relay is OFF and when said main relay is ON said second resistor is disconnected; said auxiliary relay is ON when the voltage from the charging source reaches a set voltage proper for charging said auxiliary relay, said auxiliary relay switches said main relay ON when the voltage from charging source reaches a set voltage proper for charging said main relay, and said auxiliary relay is switched OFF by the current through said first resistor when the charging source has a voltage less than said set voltage, whereby said main relay is de-actuated.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |