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Class Information
Number: 340/511
Name: Communications: electrical > Condition responsive indicating system > With particular system function (e.g., temperature compensation, calibration) > Alarm system supervision > Threshold or window (e.g., of analog electrical level)
Description: Subject matter wherein the supervisory circuit is coupled to the primary alarm circuit and is responsive to the signal therein attaining a predetermined level or range of levels.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6989742 |
Device and system for detecting abnormality |
Jan. 24, 2006 |
| 6980102 |
Alert processing |
Dec. 27, 2005 |
| 6975237 |
System, controller and method of detecting a hazardous condition within an enclosure having a ventilation system |
Dec. 13, 2005 |
| 6972676 |
Method and apparatus for remotely monitoring a site |
Dec. 6, 2005 |
| 6970079 |
High/low level alarm controller |
Nov. 29, 2005 |
| 6965308 |
System and method for operating a plurality of power generation stations |
Nov. 15, 2005 |
| 6954142 |
Surveillance system and method |
Oct. 11, 2005 |
| 6920312 |
RF generating system with fast loop control |
Jul. 19, 2005 |
| 6917288 |
Method and apparatus for remotely monitoring a site |
Jul. 12, 2005 |
| 6907388 |
Monitoring apparatus |
Jun. 14, 2005 |
| 6879260 |
Load indicator |
Apr. 12, 2005 |
| 6873256 |
Intelligent building alarm |
Mar. 29, 2005 |
| 6873254 |
Multicondition detection apparatus and method providing interleaved tone and verbal warnings |
Mar. 29, 2005 |
| 6871785 |
Method and device for compensating undesired variations in an electrical signal generated by an optical code reader |
Mar. 29, 2005 |
| 6867700 |
System and an arrangement to determine the level of hazard in a hazardous situation |
Mar. 15, 2005 |
| 6856243 |
Method and apparatus for pest deterrence |
Feb. 15, 2005 |
| 6822564 |
Parallel measurement alarm processor |
Nov. 23, 2004 |
| 6812827 |
System and method for testing and maintaining a predetermined physical bit rate on a line connection |
Nov. 2, 2004 |
| 6803853 |
Testing device for operation testing of a temperature sensor of an alarm or an alarm and a method of operation testing of an alarm |
Oct. 12, 2004 |
| 6798340 |
Collision detecting apparatus for vehicle |
Sep. 28, 2004 |
| 6771170 |
Power system waveform capture |
Aug. 3, 2004 |
| 6756906 |
Self-diagnostic smoke detector |
Jun. 29, 2004 |
| 6756907 |
Maintainance support system for an electrical apparatus |
Jun. 29, 2004 |
| 6753772 |
Method and arrangement for detecting and digitally transmitting measured analog output values of a number of transducers |
Jun. 22, 2004 |
| 6753776 |
Presence sensing system and method |
Jun. 22, 2004 |
| 6734793 |
Method of transmitting a measurement signal between a measuring unit and a control unit |
May. 11, 2004 |
| 6727812 |
Method and device for error detection and diagnosis in a knock sensor |
Apr. 27, 2004 |
| 6717513 |
Electronic message delivery system utilizable in the monitoring of remote equipment and method of same |
Apr. 6, 2004 |
| 6696940 |
System and method for loop diagnostics in a security system |
Feb. 24, 2004 |
| 6696939 |
Signaling fire detector |
Feb. 24, 2004 |
| 6693528 |
Switchgear cabinet monitoring arrangement |
Feb. 17, 2004 |
| 6686881 |
Wireless identification and tracking using magnetic fields |
Feb. 3, 2004 |
| 6642845 |
Signal transmitter and signal quality monitoring device |
Nov. 4, 2003 |
| 6642846 |
Infrared intrusion detector and method |
Nov. 4, 2003 |
| 6633230 |
Apparatus and method for providing improved stress thresholds in network management systems |
Oct. 14, 2003 |
| 6628993 |
Method and arrangement for the mutual monitoring of control units |
Sep. 30, 2003 |
| 6597287 |
Sensor device and method for operating a sensor device |
Jul. 22, 2003 |
| 6577233 |
Fire alarm system and terminal equipment in the same |
Jun. 10, 2003 |
| 6556957 |
Method and device for detecting drifts, jumps and/or outliers of measurement values |
Apr. 29, 2003 |
| 6542075 |
System and method for providing configurable security monitoring utilizing an integrated information portal |
Apr. 1, 2003 |
| 6535124 |
Method and apparatus for digital analysis and signal conditioning in a turbine generator silo combustor |
Mar. 18, 2003 |
| 6522248 |
Multicondition detection apparatus and method providing interleaved tone and verbal warnings |
Feb. 18, 2003 |
| 6518879 |
Apparatus and method for monitoring line disconnection and a fire, and a fire alarm system having the same |
Feb. 11, 2003 |
| 6518878 |
Warning system |
Feb. 11, 2003 |
| 6507277 |
Danger signalling system |
Jan. 14, 2003 |
| 6505086 |
XML sensor system |
Jan. 7, 2003 |
| 6492901 |
Alarm management system |
Dec. 10, 2002 |
| 6462653 |
System and method of group definition |
Oct. 8, 2002 |
| 6459370 |
Method and apparatus for determining proper installation of alarm devices |
Oct. 1, 2002 |
| 6459377 |
Abnormal condition detecting system detecting abnormal condition of user at residence |
Oct. 1, 2002 |
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