US3665740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic pin tumbler lock
Assignee: Goal Co Ltd
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Filing: 1970-06-29
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Granted: 1972-05-30
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Expires: 1990-06-29
Abstract
Abstract An improved magnetic pin tumbler lock is controllable by magnetic attraction and repulsion in such a manner that the magnetic attraction or repulsion established due to the relative positions and polarity orientations of fixed magnetic pins placed in a plurality of pin bores arranged in line in the inside face of the lock cylinder, of movable magnetic pins slidably installed in pin bores to mate with the fixed magnetic pins, and of magnetic pieces provided in the key to be inserted through the key slot located at the center of the lock plug allow locking and unlocking of the lock. Non-magnetic pieces are associated with the movable magnetic pins and tread the shear line represented by a boundary line between the cylinder and the plug when the lock is locked.
Inventors
- 👤 Mitsumasa Taniyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:43
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/0038; E05B47/0044; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7057; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7667; Y10T70/7684; Y10T70/80; Y10T70/8919
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
230 words
A magnetic pin tumbler and lock assembly comprising a cylinder having a circular longitudinal opening therethrough, a plurality of pin holes extending transversely of said cylinder and communicating with said longitudinal opening, and a plurality of magnetic pieces fixed in said pin bores; a plug fitting into said longitudinal opening and having a longitudinal key slot therein, said cylinder and plug forming therebetween a shear line, a plurality of pin bores extending transversely of said plug on the outer periphery thereof and aligned with said corresponding pin bores in said cylinder, a plurality of movable magnetic pins positioned in said pin bores of said plug and haviNg a magnetic polarity to be attracted by said fixed magnetic pieces, and a plurality of non-magnetic pieces fixed to said movable magnetic pins only at the surfaces thereof closest said fixed magnetic pieces, said non-magnetic pieces extending toward said fixed magnetic pieces and dimensioned to tread said shear line only when said movable magnetic pins are attracted toward said fixed magnetic pieces; and a key adapted to fit into said key slot and having thereon a plurality of magnetic pieces aligning with said movable magnetic pins, said key magnetic pieces having a magnetic polarity to attract said movable magnetic pins, the attraction between said key magnetic pieces and said pins being stronger than the attraction between said fixed magnetic pieces and said pins.
Claim 2
Dependent Claim
230 words
A magnetic pin tumbler and lock assembly comprising a cylinder having a circular longitudinal opening therethrough, a plurality of pin holes extending transversely of said cylinder and communicating with said longitudinal opening, and a plurality of magnetic pieces fixed in said pin bores; a plug fitting into said longitudinal opening and having a longitudinal key slot therein, said cylinder and plug forming therebetween a shear line, a plurality of pin bores extending transversely of said plug on the outer periphery thereof and aligned with said corresponding pin bores in said cylinder, a plurality of movable magnetic pins positioned in said pin bores of said plug and haviNg a magnetic polarity to be attracted by said fixed magnetic pieces, and a plurality of non-magnetic pieces fixed to said movable magnetic pins only at the surfaces thereof closest said fixed magnetic pieces, said non-magnetic pieces extending toward said fixed magnetic pieces and dimensioned to tread said shear line only when said movable magnetic pins are attracted toward said fixed magnetic pieces; and a key adapted to fit into said key slot and having thereon a plurality of magnetic pieces aligning with said movable magnetic pins, said key magnetic pieces having a magnetic polarity to attract said movable magnetic pins, the attraction between said key magnetic pieces and said pins being stronger than the attraction between said fixed magnetic pieces and said pins.
Claim 3
Dependent Claim
258 words
A magnetic pin tumbler and lock assembly comprising a cylinder having a circular longitudinal opening therethrough, a plurality of pin bores extending transversely of said cylinder and communicating with said longitudinal opening, and a plurality of magnetic pieces fixed in said pin bores; a plug fitting into said longitudinal opening and having a longitudinal key slot therein, said cylinder and plug forming therebetween a shear line, a plurality of pin bores extending transversely of said plug on the outer periphery thereof and aligned with but larger than said corresponding pin bores in said cylinder, a plurality of movable magnetic pins positioned in said pin bores of said plug having a magnetic polarity to be repelled by said fixed magnetic pieces, and a plurality of non-magnetic pieces positioned in said cylinder pin bores and abutted to said movable magnetic pins only at the surfaces thereof closest said fixed magnetic pieces,said non-magnetic pieces extending toward said fixed magnetic pieces and dimensioned to tread said shear line only when said movable magnetic pins are repelled away from said fixed magnetic pieces; and a key adapted to fit into said key slot and having thereon a plurality of magnetic pieces aligning with said movable magnetic pins, said key magnetic pieces having a magnetic polarity to repel said movable magnetic pins, the repulsion between said key magnetic pieces and said pins being stronger than the repulsion between said fixed magnetic pieces and said pins, said movable magnetic pins abutting the inner periphery of said cylinder when said key is in said key slot.
Claim 4
Dependent Claim
258 words
A magnetic pin tumbler and lock assembly comprising a cylinder having a circular longitudinal opening therethrough, a plurality of pin bores extending transversely of said cylinder and communicating with said longitudinal opening, and a plurality of magnetic pieces fixed in said pin bores; a plug fitting into said longitudinal opening and having a longitudinal key slot therein, said cylinder and plug forming therebetween a shear line, a plurality of pin bores extending transversely of said plug on the outer periphery thereof and aligned with but larger than said corresponding pin bores in said cylinder, a plurality of movable magnetic pins positioned in said pin bores of said plug having a magnetic polarity to be repelled by said fixed magnetic pieces, and a plurality of non-magnetic pieces positioned in said cylinder pin bores and abutted to said movable magnetic pins only at the surfaces thereof closest said fixed magnetic pieces,said non-magnetic pieces extending toward said fixed magnetic pieces and dimensioned to tread said shear line only when said movable magnetic pins are repelled away from said fixed magnetic pieces; and a key adapted to fit into said key slot and having thereon a plurality of magnetic pieces aligning with said movable magnetic pins, said key magnetic pieces having a magnetic polarity to repel said movable magnetic pins, the repulsion between said key magnetic pieces and said pins being stronger than the repulsion between said fixed magnetic pieces and said pins, said movable magnetic pins abutting the inner periphery of said cylinder when said key is in said key slot.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |