Patent US3901057A successfully refreshed from Google Patents.
US3901057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Padlock
Assignee: Individual
•
Filing: 1974-05-01
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Granted: 1975-08-26
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Expires: 1994-05-01
Abstract
Abstract An electromagnetic padlock including a detent normally holding a padlock shackle in a locking position, a solenoid connected to said detent for disengaging the detent from the shackle when the solenoid is energized, and an energizing unit having a plug which may be detachably connected to a jack, carried by the padlock case, and which is electrically connected to the solenoid, for energizing the solenoid when an electric current is supplied thereto from a current source to which the energizing unit is connected. The solenoid is capable of being energized for disengaging the detent only when a voltage of a particular value is supplied thereto. The energizing unit includes a transformer for changing the voltage received from the current source to a voltage corresponding to that required to energize the solenoid.
Inventors
- 👤 Sr Clifford L Coley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:22
CPC Classifications
E; E05; E05B; E05B47/00; E05B67/00; Y; Y10; Y10S; Y10S70/00; Y10S70/46; Y10T; Y10T70/00; Y10T70/40; Y10T70/413; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/7124
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A lock including a part movable between a locked an an unlocked position, a detent engaging and normally retaining said part in a locked position, a solenoid connected to said detent for moving the detent out of engagement with said part when the solenoid is energized, said solenoid being capable of being energized only by a voltage of a particular value, an electrical conductor connecting said solenoid to an electric current source, means interposed in said conductor for changing the voltage of the current to the particular voltage capable of energizing the solenoid, said conductor having connector means at each end constituting parts of an unlocking device which is normally detached from the lock, and said lock having means electrically connected to the solenoid to receive one of said connector means, said other connector means being adapted to be removably connected to the current source.
Claim 2
Dependent Claim
145 words
A lock including a part movable between a locked an an unlocked position, a detent engaging and normally retaining said part in a locked position, a solenoid connected to said detent for moving the detent out of engagement with said part when the solenoid is energized, said solenoid being capable of being energized only by a voltage of a particular value, an electrical conductor connecting said solenoid to an electric current source, means interposed in said conductor for changing the voltage of the current to the particular voltage capable of energizing the solenoid, said conductor having connector means at each end constituting parts of an unlocking device which is normally detached from the lock, and said lock having means electrically connected to the solenoid to receive one of said connector means, said other connector means being adapted to be removably connected to the current source.
Claim 3
Dependent Claim
11 words
A lock as in claim 1, said means comprising a transformer.
Claim 4
Dependent Claim
34 words
A lock as in claim 1, and a manually actuated normally open switch interposed in said conductor and adapted to be manually actuated for completing the circuit from the current source to the solenoid.
Claim 5
Dependent Claim
77 words
A lock as in claim 1, said lock comprising a padlock, said part comprising a slidably mounted shackle having one leg provided with a notch, said detent comprising a hook having a bill for engaging said notch, means pivotally mounting the hook in the padlock, and said solenoid having a slidably mounted armature connected to the hook for swinging the bill thereof out of engagement with said notch when the solenoid is energized to retract the armature.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |