US3813663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical locking alarm system
Assignee: Individual
•
Filing: 1972-11-10
•
Granted: 1974-05-28
•
Expires: 1992-11-10
Abstract
Abstract A lock including magnetically actuated reed switches positioned in a predetermined position and operatively connected into an electrical circuit having an alarm actuated by trip switches, wherein the lock is set for alarm actuation by a key having magnets arranged in a pattern to coincide with said lock.
Inventors
- 👤 D Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:17
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/10; B60R25/1003; G; G08; G08B; G08B13/00; G08B13/02; G08B13/08; B60R25/1004; Y; Y10; Y10S; Y10S70/00; Y10S70/49
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
189 words
A locking alarm system including: a lock comprising a plurality of concealed magnetically activated reed switches arranged in a predetermined pattern; an alarm circuit electrically connected with said reed switches; a source of electrical power interconnected with said alarm circuit; an alarm device electrically connected within said alarm circuit; at least one trip switch electrically connected with said alarm circuit; a separate key having magnets disposed so as to coincide with selected set reed switches to actuate said alarm device for triggering, said magnets capable of activating said reed switches when said key is moved close to them; a reset circuit which neutralizes said alarm and wherein at least one of said reed switches in said lock is a reset reed switch interconnected within said reset circuit and capable of actuating it when said reset switch is activated, and said key magnets are positioned so as to be capable of activating said reset switch without activating the other reed switches in said circuit; wherein, when both said selected set reed switches and said trip switch are activated, said alarm circuit is closed and said alarm device is thereby triggered.
Claim 2
Dependent Claim
189 words
A locking alarm system including: a lock comprising a plurality of concealed magnetically activated reed switches arranged in a predetermined pattern; an alarm circuit electrically connected with said reed switches; a source of electrical power interconnected with said alarm circuit; an alarm device electrically connected within said alarm circuit; at least one trip switch electrically connected with said alarm circuit; a separate key having magnets disposed so as to coincide with selected set reed switches to actuate said alarm device for triggering, said magnets capable of activating said reed switches when said key is moved close to them; a reset circuit which neutralizes said alarm and wherein at least one of said reed switches in said lock is a reset reed switch interconnected within said reset circuit and capable of actuating it when said reset switch is activated, and said key magnets are positioned so as to be capable of activating said reset switch without activating the other reed switches in said circuit; wherein, when both said selected set reed switches and said trip switch are activated, said alarm circuit is closed and said alarm device is thereby triggered.
Claim 3
Dependent Claim
56 words
A locking alarm system as defined in claim 1 which includes a normally open set relay and a normally closed reset relay interconnected in electrical circuitry with said alarm device, wherein said set relay is responsive to activation of said set reed switches and said reset relay is responsive to activation of said reset reed switches.
Claim 4
Dependent Claim
22 words
A locking alarm system as defined in claim 2 wherein said reed switches are encapsulated within opaque nonmagnetic material within said lock.
Claim 5
Dependent Claim
25 words
A locking alarm system as defined in claim 3 wherein there are a plurality of parallel wired trip switches electrically connected to said alarm circuit.
Claim 6
Dependent Claim
50 words
A locking alarm system as defined in claim 4 which includes an anti-tampering reed switch in said lock, an anti-tampering relay electrically connected with said alarm device and said set relay wherein, when said set relay is activated, magnetic attraction adjacent to said anti-tampering switch will trigger said alarm deVice.
Claim 7
Dependent Claim
21 words
A locking alarm system as defined in claim 5 wherein said magnets are encapsulated within opaque nonmagnetic material in said key.
Claim 8
Dependent Claim
37 words
A locking alarm system as defined in claim 6 wherein said lock is positioned on one side of a non-magnetic structure and said key is placed on the opposite side of said structure to actuate said lock.
Claim 9
Dependent Claim
70 words
A locking alarm system as defined in claim 9 wherein the exterior shape of said key matches the exterior shape of said lock and wherein aligning one side of said key adjacent to said lock causes selected magnets in said key to activate said set switches and wherein aligning the opposite side of said key adjacent to said lock causes selected magnets in said key to activate said reset switches.
Claim 10
Dependent Claim
44 words
A locking alarm system as defined in claim 8 in combination with a motor vehicle wherein said lock is placed inside a fixed window and said trip switches are positioned at points of possible unauthorized entry so as to be actuated by unauthorized entry.
References Cited (Backward Citations)
US2648729A
Cited
US2769873A
Cited
US2931953A
Cited
US2882455A
Cited
US2967916A
Cited
US3569928A
Cited
US3705277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |