Patent US5107446A successfully refreshed from Google Patents.
US5107446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Environmental detection system useful for fire detection and suppression
Assignee: Fike Corp
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Filing: 1990-08-17
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Granted: 1992-04-21
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Expires: 2010-08-17
Abstract
Abstract An environmental detection system particularly useful for fire detection and suppression is provided which ensures high reliability in operation and high reliability in preventing false operation. The preferred system includes a microprocessor-based, software-governed, control panel connected to one or more detector loops. Each loop includes a plurality of parallel-coupled, addressable detectors which send analog signals to the control panel representative of an environmental parameter such as smoke obscuration along with reference and identification signals. The preferred system provides automatic calibration and test of the detectors, automatic testing under load of the backup batteries, flexibility in defining the protective scheme, and storage of history information concerning system alarms and troubles. The preferred system also verifies alarm conditions before actuating an alarm or discharging a fire suppressant.
Inventors
- 👤 Bon F. Shaw
- 👤 Gary M. Bond
- 👤 Randy R. Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:36
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
230 words
An apparatus for detecting an environmental condition such as fire, smoke and intrusion in a monitored space, said apparatus comprising: a plurality of detectors each including means for sensing an environmental condition parameter in a monitored space and for producing detector signals representative of said parameter; signal processing means including means for operably coupling with said detectors for receiving and processing said detector signals for determining the existence of predetermined environmental condition therefrom, and including means for periodically producing a battery test command signal; and power supply means for supplying the electrical energy requirements of said apparatus, said power supply means including means for coupling with a source of external power for supplying said energy requirements, battery means for supplying said energy requirements in the absence of external power, battery charger means selectively connectable with said battery for charging thereof, a test load, and control means responsive to receipt of said battery test signal for disconnecting said battery charger means from said battery means, for connecting said test load to said battery means, and for producing a battery load signal representative of the performance of said battery means under said load, said signal processing means including means for operably coupling with said control means for receiving and responding to said load signal for determining whether said battery is capable of supplying said energy requirements for a predetermined amount of time.
Claim 2
Independent Claim
230 words
An apparatus for detecting an environmental condition such as fire, smoke and intrusion in a monitored space, said apparatus comprising: a plurality of detectors each including means for sensing an environmental condition parameter in a monitored space and for producing detector signals representative of said parameter; signal processing means including means for operably coupling with said detectors for receiving and processing said detector signals for determining the existence of predetermined environmental condition therefrom, and including means for periodically producing a battery test command signal; and power supply means for supplying the electrical energy requirements of said apparatus, said power supply means including means for coupling with a source of external power for supplying said energy requirements, battery means for supplying said energy requirements in the absence of external power, battery charger means selectively connectable with said battery for charging thereof, a test load, and control means responsive to receipt of said battery test signal for disconnecting said battery charger means from said battery means, for connecting said test load to said battery means, and for producing a battery load signal representative of the performance of said battery means under said load, said signal processing means including means for operably coupling with said control means for receiving and responding to said load signal for determining whether said battery is capable of supplying said energy requirements for a predetermined amount of time.
Claim 3
Dependent Claim
89 words
The apparatus as set forth in claim 1, said power supply means further including shiftable actuatable connection means operably coupled with said battery means and said test load for selectively shifting between a connected position in which said test load is electrically coupled with said battery means in order to place said battery means under load, and a disconnected position in which said test load is electrically disconnected from said battery means, said battery test means including means for actuating said connecting means between said connected and disconnected positions.
Claim 4
Dependent Claim
28 words
The apparatus as set forth in claim 2, said test means including means for actuating said connecting means to said connected position for a predetermined length of time.
Claim 5
Dependent Claim
56 words
The apparatus as set forth in claim 2, said test means including means for actuating said connecting means to said connected position until said voltage falls below a predetermined limit and means for measuring the time interval for said test voltage to fall below said predetermined limit, said time interval being an indication of battery capacity.
Claim 6
Dependent Claim
23 words
The apparatus as set forth in claim 1, said power supply means including means for coupling with an external source of operating power.
Claim 7
Dependent Claim
34 words
The apparatus as set forth in claim 1, said processing means including means for determining whether said test voltage falls below a predetermined limit, such being indicative of unreliable capacity of said battery means.
Claim 8
Dependent Claim
15 words
The apparatus as set forth in claim 1, said environmental condition parameter including smoke obscuration.
Claim 9
Dependent Claim
14 words
The apparatus as set forth in claim 1, said processing means including a microprocessor.
Claim 10
Dependent Claim
18 words
The apparatus as set forth in claim 1, all of said detectors sensing the same environmental condition parameter.
Claim 11
Dependent Claim
15 words
The apparatus as set forth in claim 1, said detection signals including analog current signals.
References Cited (Backward Citations)
US4138670B1
Cited
US4138670A
Cited
US4138670B2
Cited
US4155081A
Cited
US4266219A
Cited
US4302714A
Cited
US4251811A
Cited
US4388615A
Cited
US4520353A
Cited
US4556873A
Cited
US4555695A
Cited
US4799039A
Cited
US4740754A
Cited
US4972181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-21 | 1995-10-21 | 1996-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-21 | 1999-10-21 | 2000-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-21 | 2003-10-21 | 2004-04-21 | $7700.00 | Window Closed / Lapsed |