Patent US3685625A successfully refreshed from Google Patents.
US3685625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for operating an apparatus for providing prestations
Assignee: Silver King Refrigeration Inc
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Filing: 1970-09-14
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Granted: 1972-08-22
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Expires: 1990-09-14
Abstract
Abstract A key having a plurality of frangible protusions for operation of the lock of an apparatus of the type which requires the use of an unlocking implement. The apparatus lock has an anvil for abutment with a selective protusion as the key is rotated within the lock. The anvil operates to break off one protrusion after each use of the key such that upon a predetermined number of uses of the key corresponding to the number of protrusions, the key no longer will operate the lock.
Inventors
- 👤 Gene Loewy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:57
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/02; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/343; G06Q20/3433
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
A device for operating an apparatus for providing prestations, said device comprising, a lock operable within the apparatus to start the same, a key adapted for mating engagement within the lock to operate same, the lock having a sleeve movable axially upon engagement of the key and movable circumferentially upon rotation of the key within the lock, said lock being operable to start the apparatus only upon both axial and circumferential movement of the sleeve, the key having a plurality of frangible protrusions spaced one adjacent the other along the length of the key, the lock including an anvil for abutment with a selective protrusion to fracture same upon rotation of the key within the lock, said key adapted to move the sleeve axially only so long as at least one protrusion remains unfractured thereon, whereby upon a predetermined number of uses of said key corresponding to said number of protrusions the key no longer will move the sleeve axially within the lock.
Claim 2
Independent Claim
163 words
A device for operating an apparatus for providing prestations, said device comprising, a lock operable within the apparatus to start the same, a key adapted for mating engagement within the lock to operate same, the lock having a sleeve movable axially upon engagement of the key and movable circumferentially upon rotation of the key within the lock, said lock being operable to start the apparatus only upon both axial and circumferential movement of the sleeve, the key having a plurality of frangible protrusions spaced one adjacent the other along the length of the key, the lock including an anvil for abutment with a selective protrusion to fracture same upon rotation of the key within the lock, said key adapted to move the sleeve axially only so long as at least one protrusion remains unfractured thereon, whereby upon a predetermined number of uses of said key corresponding to said number of protrusions the key no longer will move the sleeve axially within the lock.
Claim 3
Dependent Claim
41 words
A device as claimed in claim 1 in which said lock includes a disc positioned co-axial with said sleeve, the disc having a pin extending therefrom for engagement with said sleeve only upon axial movement of the sleeve toward said disc.
Claim 4
Dependent Claim
45 words
A device as claimed in claim 1 in which said anvil is coupled to said sleeve so as to move axially in response to axial movement of the sleeve whereby upon each use of the key the anvil is positioned to fracture a selective protrusion.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |