Patent US3643479A successfully refreshed from Google Patents.
US3643479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic hood and trunk-locking device
Assignee: Individual
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Filing: 1970-05-22
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Granted: 1972-02-22
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Expires: 1990-05-22
Abstract
Abstract A locking device for an enclosure such as a hood or trunk of an automobile includes a casing having a slidable bolt actuated by a first solenoid and held by a lever in extended position. A second solenoid retracts the lever to permit retraction of the bolt by a spring. A switch in the casing is disposed for operation by the bolt when the bolt is retracted. The first and second solenoids are operable in response to actuation of a key controlled switch and associated electronic circuitry which includes two opposing transistors. The first solenoid is actuated by discharges of a capacitor through one of the transistors when the other transistor is rendered nonconductive.
Inventors
- 👤 Joseph Solow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:12
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/01; B60R25/04; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1014; Y10T292/1021; Y10T70/00; Y10T70/50; Y10T70/5889; Y10T70/5903; Y10T70/5907; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/7119
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
A locking device for an enclosure in a vehicle or the like comprising a casing, a bolt axially slidable in said casing, a first solenoid in said casing, a first lever operatively connected to the solenoid and arranged to extend the bolt from the casing into a locked position thereof when the solenoid is energized, a second solenoid in the casing, a second lever in the casing arranged to engage the bolt and to hold it extended in the locked position, means operatively connecting the second lever and second solenoid to release the bolt for retraction to open position when the second solenoid is energized, a key controlled switch, and electronic circuitry interconnecting said switch and first solenoid for energizing the same to extend the bolt when said switch is opened.
Claim 2
Dependent Claim
131 words
A locking device for an enclosure in a vehicle or the like comprising a casing, a bolt axially slidable in said casing, a first solenoid in said casing, a first lever operatively connected to the solenoid and arranged to extend the bolt from the casing into a locked position thereof when the solenoid is energized, a second solenoid in the casing, a second lever in the casing arranged to engage the bolt and to hold it extended in the locked position, means operatively connecting the second lever and second solenoid to release the bolt for retraction to open position when the second solenoid is energized, a key controlled switch, and electronic circuitry interconnecting said switch and first solenoid for energizing the same to extend the bolt when said switch is opened.
Claim 3
Dependent Claim
31 words
A locking device as defined in claim 1, further comprising a first spring connected between said casing and said first lever for retracting the bolt when the first solenoid is deenergized.
Claim 4
Dependent Claim
33 words
A locking device as defined in claim 2, further comprising a second spring connected between said casing and said second lever and tending to urge the second lever into engagement with said bolt.
Claim 5
Dependent Claim
42 words
A locking device as defined in claim 1, further comprising normally open switch means, said switch means being disposed in said casing adjacent to said bolt and arranged to be closed by the bolt when the bolt is in retracted, open position.
Claim 6
Dependent Claim
147 words
A locking device as defined in claim 1, said electronic circuitry comprising a power supply, a first transistor connected in circuit with said switch and power supply and maintained in a conductive condition when the switch is closed, a second transistor connected in circuit with the first transistor and maintained in nonconductive condition when the first transistor is conducting, a capacitor connected in circuit with the first and second transistors and maintained in a charged condition while the first transistor is conducting, means connecting said first solenoid in circuit with the second transistor and capacitor and maintaining the first solenoid in deenergized condition when the second transistor is nonconducting, whereby the charged capacitor discharges through said second transistor and said first solenoid when the first transistor is cut off by opening of said switch, so that the bolt is extended froM the casing into said locked position.
Claim 7
Dependent Claim
39 words
A locking device as defined in claim 5, wherein the second solenoid is connected in circuit with said switch and power supply to be energized thereby for releasing said bolt to retract the same when the switch is closed.
Claim 8
Dependent Claim
38 words
A locking device as defined in claim 6, further comprising normally open switch means disposed in said casing adjacent to said bolt and arranged to be closed by the bolt when the bolt is in retracted, open position.
Claim 9
Dependent Claim
48 words
A locking device as defined in claim 7, further comprising electrical circuit means connected in circuit with said key-controlled switch and said normally open switch, so that said electrical circuit means is closed only when the key-controlled switch is closed and said bolt is in retracted, open position.
Claim 10
Dependent Claim
80 words
A locking device as defined in claim 7, further comprising a first spring connected between said casing and said first lever for retracting the bolt to open position when the first solenoid is deenergized; and a second spring connected between said casing and said second lever and tending to urge the second lever into engagement with said bolt, said bolt having a lateral slot disposed for engagement by said second lever when the bolt is in said closed, extended position.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |