US3785188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic controlled door lock
Assignee: MODERN ANNUCIATION Inc
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Filing: 1972-03-21
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Granted: 1974-01-15
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Expires: 1992-03-21
Abstract
Abstract A lock for a door, the lock including a safety feature that prevents an intruder or unauthorized person from opening the lock; the safety feature consisting of a magnetically operated mechanism which is operative by a special key of unconventional design and which magnetically pulls a part of the mechanism into an operational position so it can co-operate with the remainder of the mechanism for sliding a bolt between a locked and an unlocked position.
Inventors
- 👤 C Drathschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:08
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/14; E05B17/142; E05B47/00; E05B47/0038; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/5341; Y10T70/5611; Y10T70/5757; Y10T70/5765; Y10T70/5805; Y10T70/5819; Y10T70/5823; Y10T70/5827; Y10T70/70; Y10T70/7051; Y10T70/7057; Y10T70/7441; Y10T70/7446; Y10T70/7452; Y10T70/778; Y10T70/7791; Y10T70/7904
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
267 words
In a magnetic controlled door lock, the combination of a case containing a magnetic controlled lock mechanism and a conventional lock, said conventional lock being operative by a first key, and said magnetic controlled lock mechanism being operative by a second key, said conventional lock being connected to a cross pin that normally blocks entry of said second key into said magnetic controlled lock mechanism, said magnetic controlled lock mechanism including a stationary barrel with an opening therethrough and into which said second key is insertable, said second key having a permanent magnet on an end thereof, a shaft of said magnetic controlled lock mechanism having a forward end thereof slidably seated in an inner end of said barrel opening, a magnet secured on said end of said shaft, said key magnet being engagable with said shaft magnet so to cause said shaft to slide forwardly when said magnets are engaged and said key is pulled in a direction outwardly of said barrel, said shaft forming a unit with a gear integral with an intermediate portion of said shaft and a knob secured on an opposite rear end of said shaft, a bolt slidable inwardly or outwardly of said case to respectively unlock or lock a door, said bolt having a toothed rack, and a spring means normAlly urging said unit rearwardly in said case so that the gear is normally out of engagement with the rack, forward movement of said shaft causing engagement of the gear with the rack whereby turning of the gear will cause the bolt to slide inwardly or outwardly of the case.
Claim 2
Dependent Claim
267 words
In a magnetic controlled door lock, the combination of a case containing a magnetic controlled lock mechanism and a conventional lock, said conventional lock being operative by a first key, and said magnetic controlled lock mechanism being operative by a second key, said conventional lock being connected to a cross pin that normally blocks entry of said second key into said magnetic controlled lock mechanism, said magnetic controlled lock mechanism including a stationary barrel with an opening therethrough and into which said second key is insertable, said second key having a permanent magnet on an end thereof, a shaft of said magnetic controlled lock mechanism having a forward end thereof slidably seated in an inner end of said barrel opening, a magnet secured on said end of said shaft, said key magnet being engagable with said shaft magnet so to cause said shaft to slide forwardly when said magnets are engaged and said key is pulled in a direction outwardly of said barrel, said shaft forming a unit with a gear integral with an intermediate portion of said shaft and a knob secured on an opposite rear end of said shaft, a bolt slidable inwardly or outwardly of said case to respectively unlock or lock a door, said bolt having a toothed rack, and a spring means normAlly urging said unit rearwardly in said case so that the gear is normally out of engagement with the rack, forward movement of said shaft causing engagement of the gear with the rack whereby turning of the gear will cause the bolt to slide inwardly or outwardly of the case.
Claim 3
Dependent Claim
48 words
The combination as set forth in claim 1 wherein said key, when pulled, moves said unit so said gear engages said toothed rack of said bolt, said unit and second key having interfitting notches and protrusions respectively so to permit rotation of said gear for sliding said bolt.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |