Patents
Sitemap › G08 - Signalling › G08B - Signalling or calling systems; Order telegraphs; Alarm systems › G08B 29 - Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
Patents for G08B 29 - Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation (6,872)
06/1985
06/11/1985US4523183 Alarm-fault detecting system
06/06/1985WO1985002476A2 Fiber optics system with self test capability
05/1985
05/28/1985US4520348 Electrical protection system
05/22/1985EP0141987A2 Alarm signalling method and application device therefor
05/21/1985US4519025 Sense point monitor circuit
05/21/1985US4518958 Capacitively coupled machine tool safety having a self-test network
05/21/1985US4518952 Sensor test circuit of an alarm system
05/15/1985EP0141030A1 Dosing arrangement for a reaction sensitivity checking device of a gas detector
05/14/1985US4517554 Method and apparatus for inspecting a danger alarm system
05/14/1985US4517161 Detection of explosive hydrocarbons in aircraft
05/08/1985EP0140502A1 Improvements relating to smoke detection apparatus
04/1985
04/30/1985US4514721 Multi-operation mode type of security-ensuring apparatus
04/30/1985US4514720 Method and apparatus for increasing the response sensitivity and the interference resistance in an alarm system
04/17/1985EP0137337A2 Signal arrangement with wireless signal transmission between a battery-operated substation and a mains-operated main station
04/16/1985US4511889 Surge protected smoke alarm
04/16/1985CA1185691A1 Method and apparatus for automatic abnormal events monitor in operating plants
03/1985
03/19/1985US4506255 Operation test circuit for fire detectors
03/19/1985US4506254 Alarm system with detectors and signaling devices on the same cable pair
03/14/1985WO1985001141A1 Test device for an optical infra red detector
03/05/1985US4502287 Refrigeration system alarm device
02/1985
02/19/1985US4500873 Testing device for an intrusion detection system
02/12/1985US4499581 Self testing system for reproduction machine
02/12/1985CA1182592A1 Ionization type smoke detector with test circuit
02/05/1985US4498074 Selectively testable fire detector
01/1985
01/29/1985CA1181831A1 Fire detection system with ir and uv ratio detector
01/16/1985EP0130992A1 Photoelectric smoke detector.
01/15/1985US4494111 Frequency agile security apparatus
01/15/1985CA1181152A1 System for producing an operating signal
01/08/1985CA1180792A1 Dynamic self-checking safety circuit means
12/1984
12/19/1984EP0128549A1 Alarm installation
12/19/1984EP0128357A1 Apparatus for the remotely controlled inspection of a primary line in danger warning systems or in transmitting systems for danger warnings
12/18/1984US4489312 Selective test circuit for fire detectors
12/11/1984US4488049 Moving wall test device in optical smoke detectors
11/1984
11/28/1984EP0126703A1 Detection apparatus
11/21/1984EP0125485A1 Signal suppression circuit for optical smoke detectors
11/21/1984EP0125387A1 Risk signalling method and apparatus
11/20/1984US4484182 Intruder detection apparatus for functioning free of disturbance while in close proximity to high-power pulse-moldulated radars
11/20/1984CA1178373A1 Combustible gas detector system
11/13/1984US4482889 Device for detecting failure of ultrasonic apparatus
11/06/1984US4481502 Central smoke alarm and annunciator
10/1984
10/24/1984EP0122489A1 Function test means of photoelectric smoke detector
10/24/1984EP0122432A1 Photoelectric smoke detector equipped with smoke detecting function test means
10/23/1984US4479113 Compensated intruder-detection systems
10/23/1984CA1176724A1 System for test sequence annunciation
10/16/1984US4477870 Digital control system monitor having a predetermined output under fault conditions
10/10/1984EP0121102A2 Arrangement for switching individual indicators over to the monitoring operation in a danger alarm system
10/10/1984EP0121048A1 Circuit arrangement for the interference level control of detectors, arranged in a danger detection device
10/09/1984US4476460 Self-test circuit for multi-point level indicator
09/1984
09/11/1984US4471492 Voltage indicating arrangement for a radio transceiver
09/04/1984US4470039 Premise alarm shunt arrangement
08/1984
08/07/1984US4464653 Combustible gas detection system
08/07/1984US4464575 Test device for an optical infra red detector
07/1984
07/31/1984US4462244 Apparatus for field testing a smoke detector
07/24/1984US4462022 Security system with radio frequency coupled remote sensors
07/19/1984WO1984002790A1 Photoelectric smoke detector and utilization thereof
07/18/1984EP0113461A2 Functional test means of light scattering type smoke detector
06/1984
06/26/1984US4456907 Ionization type smoke detector with test circuit
06/26/1984US4456906 Automatic testing of carrier relay equipment in electrical power transmission lines
06/20/1984EP0111178A1 Control device with several detectors connected in chain form to a signal line
06/19/1984US4455487 Fire detection system with IR and UV ratio detector
06/19/1984US4455464 Alarm system sensing and triggering apparatus
06/07/1984WO1984002216A1 A locality supervision system
06/05/1984CA1168725A1 Capacitance intrusion detection system
05/1984
05/29/1984US4451785 Testing system for electro-optical radiation detectors
05/29/1984US4451733 Infrared intrusion detector with optical pattern locators
05/02/1984EP0107042A1 Infrared detector for spotting an intruder in an area
04/1984
04/24/1984US4445206 Remote acoustic monitoring device which is testable by variation of the supply voltage
04/17/1984US4443791 Self-compensating gas detection apparatus
04/12/1984WO1984001456A1 Self-controlled and self protected alarm device
04/12/1984WO1984001431A1 Combustible vapor detection system
04/10/1984US4442426 Signal transmission
03/1984
03/28/1984EP0104091A2 Self testing system for reproduction machine
03/20/1984CA1164052A1 Intrusion alarm system for vehicles
03/13/1984US4437089 Dual sensitivity intrusion detection system
03/06/1984US4435698 Circuit arrangement for the transmission of measurements to a central, especially in a fire alarm system
02/1984
02/28/1984CA1163004A1 Security system
02/22/1984EP0101172A1 Short circuit fault isolation means for electrical circuit arrangements
02/15/1984EP0100386A1 Improved remote sensing and control system
02/14/1984US4432041 Smoke penetrating emergency light
01/1984
01/18/1984EP0098326A1 Circuit arrangement for signalling alarms
01/04/1984EP0097189A1 Light extinction smoke detector.
12/1983
12/27/1983US4422682 Device for checking and resetting smoke alarms
12/20/1983US4422067 Dynamic self-checking safety circuit means
12/13/1983US4420746 Self-calibrating smoke detector and method
12/13/1983US4420745 Security system
12/13/1983US4420721 Electricity meters
11/1983
11/23/1983EP0094659A1 Passive infrared intrusion detector
11/23/1983EP0094534A1 Smoke detector according to the radiation-extinction principle
11/16/1983EP0094279A1 Method of protecting a telemonitoring system against sabotage and system carrying out this method
11/16/1983EP0093872A1 Method for the transmission of measured values in a control system
10/1983
10/25/1983US4412211 System for test sequence annunciation
10/18/1983US4410884 Alarm system
10/18/1983US4410883 Multiple annunciation system
10/18/1983CA1155550A1 Apparatus for the storage and transfer of information
10/12/1983EP0090880A1 Locking and unlocking device, and access control for enclosures and rooms
09/1983
09/28/1983EP0089607A1 Mains-wired monitoring and security system
09/20/1983US4405919 Method of fire detection and fire detection installation
09/20/1983US4405234 Radiation detection apparatus having refractive light checking feature
09/13/1983US4404548 Method for transmitting measuring values in a fire alarm system and apparatus for the performance of the aforesaid method
08/1983
08/31/1983EP0087094A1 Electronic circuit arrangement comprising a switching device and fault indicator
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