US5103206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Security system
Assignee: Individual
•
Filing: 1989-07-14
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Granted: 1992-04-07
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Expires: 2009-07-14
Abstract
Abstract A security system including a plurality of alarm equipped security units usable at discrete locations and operated by individual power sources at those discrete locations. The units are interconnected and alarm linked with one another with the system being set up such that disruption of the interconnection between units at any location in the system causes alarm operation at all of the alarm linked security units.
Inventors
- 👤 Thiann R. Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:51
CPC Classifications
G; G08; G08B; G08B27/00; G08B27/003
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A security system comprising a plurality of alarm equipped security units useable at discrete locations and operated by individual power sources at such discrete locations, said system having linking means for linking all of said units with one another and each unit having at least one environmental sensor and each unit being settable in either one of a link mode or a mono-mode and said system operating such that regardless of the mode in which any of said units is set, an alarm is indicated at all of said units set in said link mode in the event of a disruption of said linking means or activation of the environmental sensor of any unit in said system while at the same time an alarm set off by the environmental sensor at any unit set in said mono-mode is isolated from all other units in said system.
Claim 2
Dependent Claim
146 words
A security system comprising a plurality of alarm equipped security units useable at discrete locations and operated by individual power sources at such discrete locations, said system having linking means for linking all of said units with one another and each unit having at least one environmental sensor and each unit being settable in either one of a link mode or a mono-mode and said system operating such that regardless of the mode in which any of said units is set, an alarm is indicated at all of said units set in said link mode in the event of a disruption of said linking means or activation of the environmental sensor of any unit in said system while at the same time an alarm set off by the environmental sensor at any unit set in said mono-mode is isolated from all other units in said system.
Claim 3
Dependent Claim
22 words
A security system as claimed in claim 1, including wireless linking means for linking said units in said system with one another.
Claim 4
Dependent Claim
22 words
A security system as claimed in claim 2, including a wireless radio transmitter and receiver combination linking said units in said system.
References Cited (Backward Citations)
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Cited
US3909826A
Cited
US4019139A
Cited
US4660023A
Cited
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Cited
US4812820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-07 | 1995-10-07 | 1996-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-07 | 1999-10-07 | 2000-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-07 | 2003-10-07 | 2004-04-07 | $7700.00 | Window Closed / Lapsed |