Patents
Sitemap › G08 - Signalling › G08B - Signalling or calling systems; Order telegraphs; Alarm systems › G08B 23 - Alarms responsive to unspecified undesired or abnormal conditions
Patents for G08B 23 - Alarms responsive to unspecified undesired or abnormal conditions (8,164)
03/1984
03/07/1984EP0102229A1 Alarm system
03/06/1984US4435700 Event detection and indication system
01/1984
01/18/1984EP0098760A2 Monitor setting method and monitoring arrangement for a site to be protected
01/17/1984US4426691 Voice warning device with repeat mechanism for an automotive vehicle
01/03/1984US4424458 Contactless proximity sensor with multilevel response
11/1983
11/29/1983CA1157923A1 Scanning control system
11/22/1983US4417235 Audible alarm network
11/15/1983US4415884 Diagnostic circuit for programmable logic safety control systems
10/1983
10/25/1983US4412211 System for test sequence annunciation
10/18/1983US4410884 Alarm system
10/18/1983CA1155550A1 Apparatus for the storage and transfer of information
09/1983
09/20/1983US4405919 Method of fire detection and fire detection installation
09/20/1983CA1154118A1 Rate of change responsive alarm system
09/14/1983EP0088524A1 Intruder alarm system
08/1983
08/30/1983US4401976 Multiple sensor interconnected alarm system responsive to different variables
08/02/1983US4395905 Sensor trouble detecting method and apparatus
07/1983
07/26/1983US4395705 Trouble-shooting circuit with first-failure identification capability
06/1983
06/29/1983EP0082729A2 Perimeter security system
06/21/1983US4389639 Voice warning device using entertainment speaker
05/1983
05/24/1983US4385271 Fault monitoring by detecting a polarity difference
04/1983
04/19/1983CA1145014A1 Diagnostics in ground proximity warning systems
03/1983
03/02/1983EP0072787A1 Alarm system
03/01/1983CA1142247A1 Thermostat
02/1983
02/23/1983EP0072650A2 Component state monitoring
12/1982
12/28/1982US4366544 Judging system for detecting failure of machine
12/14/1982CA1137580A1 Dual alarm detection on single loop
11/1982
11/23/1982CA1136245A1 Timed audible alarm system utilizing a piezoelectric transducer
11/09/1982US4358810 Circuit breaker with alarm
10/1982
10/20/1982EP0063012A2 Trip apparatus
09/1982
09/29/1982EP0061254A1 Apparatus for and methods of monitoring partial discharge in high voltage electrical equipment
09/28/1982US4352089 Voice warning system for an automotive vehicle
09/28/1982US4352088 Voice warning system for an automotive vehicle
09/21/1982US4350971 Circuit for use in the detection of the condition of an isolated switch contact
09/02/1982WO1982002971A1 Electronic warning system
07/1982
07/27/1982US4342023 Noise level controlled voice warning system for an automotive vehicle
07/13/1982CA1127418A1 Apparatus and method for indicating the presence in a fluid of one or more predetermined substance
07/06/1982US4338601 Apparatus for the storage and transfer of information
06/1982
06/15/1982CA1125858A1 Apparatus and method for detecting substances and regulating current
05/1982
05/25/1982CA1124383A1 Vibration detector incorporating two or more seismic elements
05/13/1982WO1982001612A1 Alarm system
04/1982
04/27/1982CA1122692A1 Audio-detector alarm
04/21/1982EP0049795A2 Electronic switching device operated without contact
04/06/1982US4323890 Switching circuit for monitoring the switching state of switch elements
03/1982
03/31/1982EP0048492A2 Drowsiness alarm system for a vehicle
03/30/1982US4322721 Self-monitoring warning installation
12/1981
12/29/1981CA1115372A1 Multi-function combustion detecting device
11/1981
11/24/1981US4302753 Multi-function combustion detecting device
11/18/1981EP0039761A2 Fire annunciating arrangement and method
10/1981
10/27/1981US4297688 Photoelectric smoke sensing and alarming device
08/1981
08/26/1981EP0034562A2 Signal station for fire alarm system
08/25/1981US4285483 Electronic events recording means
08/25/1981CA1107835A1 Surveillance method and system with electromagnetic carrier and plural range limiting signals
08/04/1981US4282519 Interconnection of alarms of smoke detectors with distinguishable alarms
07/1981
07/29/1981EP0032593A2 Alarm, security and monitoring apparatus
05/1981
05/26/1981US4270041 Process and apparatus for detecting the presence of a physical phenomenon
05/19/1981CA1101511A1 Vehicle system monitor
05/12/1981US4267553 Method and apparatus for securing attache cases
05/05/1981CA1100589A1 Single wire power/signal system for vehicle auxiliary devices
04/1981
04/21/1981US4263583 Digital alarm system with variable alarm hysteresis
04/14/1981US4262286 Apparatus for monitoring fire and effecting control operation
04/07/1981US4260981 Physical condition monitoring system for detection in remote places
03/1981
03/31/1981CA1098611A1 Alarm system with acoustically coupled transmitters and receiver
02/1981
02/24/1981CA1096450A1 Alarm driver for a smoke detector
02/17/1981US4250829 Vapor detector for marine propulsion apparatus
02/10/1981US4250464 Multi-mode relaxation oscillator
01/1981
01/20/1981US4245997 Detection of gas by color change, warning by an alarm when gas is above or below threshold
01/20/1981CA1094158A1 Battery discriminator circuit for smoke detector
01/07/1981EP0020602A1 Event detection and indication system
01/06/1981US4243971 Test circuit for automotive passenger restraint systems
12/1980
12/16/1980US4240077 Thermostat
12/09/1980CA1091323A1 Malfunction alerting indicator for carburetor choke valve
11/1980
11/25/1980CA1090483A1 High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means
11/18/1980US4234866 Centralized alarm system for vehicles
11/18/1980CA1089997A1 Apparatus for distinguishing between failures in a digital transmission network
10/1980
10/14/1980US4228429 Alarm system having phase-sensitive bridge circuit
09/1980
09/03/1980EP0014714A1 Alarm device partly mobile with protection against failure to operate, breakdown, sabotage and false alarm
08/1980
08/19/1980US4218677 Detecting loop digital interface circuitry
08/19/1980CA1084138A1 Remote signalling apparatus, particularly suitable for anti-theft and anti-burglary protection
08/05/1980CA1083242A1 Monitor and alarm apparatus in loop line system
08/05/1980CA1082962A1 High output audible alarm device utilizing a piezoelectric transducer and voltage doubling means
07/1980
07/29/1980US4215278 Detector for abnormal phenomena
07/15/1980US4212208 Vibration detector incorporating two or more seismic elements
06/1980
06/24/1980US4209779 Method of monitoring equipment and system for carrying out the method
06/12/1980WO1980001214A1 Event indication and indication system
06/11/1980EP0011680A1 Malfunction detecting circuit for a safety device actuator used to protect vehicle occupants in the event of a collision
06/11/1980EP0011625A1 Thermostat control for heating and/or cooling system
06/10/1980US4207559 Alarm system with acoustically coupled transmitters and receiver
06/10/1980US4207558 Interconnection circuit for a plurality of alarm units
04/1980
04/16/1980EP0009901A1 Alarm system
04/15/1980US4198625 Dual alarm detection on single loop
04/15/1980US4198624 Alarm system
03/1980
03/25/1980US4195286 Alarm system having improved false alarm rate and detection reliability
01/1980
01/22/1980US4185277 Trip alarm circuit
01/08/1980CA1069602A1 Fluid flow detector for a fire alarm system
12/1979
12/25/1979US4180801 System for supervising connection points
11/1979
11/15/1979WO1979000902A1 Alarm device partly mobile with protection against failure to operate,breakdown,sabotage and false alarm
10/1979
10/09/1979US4170769 Audio-detector alarm
09/1979
09/20/1979WO1979000691A1 Thermostat control for heating and/or cooling system
09/18/1979CA1062794A1 Supervisory control system
09/04/1979US4167004 Apparatus for detecting plural repetitive signals
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