| 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) |
|---|
| 08/30/1983 | US4401976 Multiple sensor interconnected alarm system responsive to different variables |
| 08/24/1983 | EP0086617A2 Remotely controllable lockable container for safekeeping articles |
| 08/17/1983 | EP0085769A1 Electricity meters |
| 08/03/1983 | EP0084634A1 Electricity meters |
| 08/02/1983 | US4396910 Coded security switch |
| 08/02/1983 | US4395905 Sensor trouble detecting method and apparatus |
| 07/19/1983 | US4394655 Bidirectional, interactive fire detection system |
| 06/28/1983 | US4390869 Gas sensing signaling system |
| 06/23/1983 | WO1983002187A1 Light extinction smoke detector |
| 06/07/1983 | CA1147828A1 Pull station protector |
| 05/31/1983 | CA1147416A1 Self-checking photoelectric smoke detector |
| 05/24/1983 | US4385287 Multiple alarm condition detection and signalling |
| 05/18/1983 | EP0079010A1 Smoke detector |
| 05/11/1983 | EP0078443A2 Fire detection system |
| 05/11/1983 | EP0078442A2 Fire detection system with IR and UV ratio detector |
| 04/26/1983 | CA1145432A1 Sensitivity test system for photoelectric smoke detector |
| 04/19/1983 | US4380760 Smoke detector with delayed alarm after change to stand-by power |
| 04/19/1983 | US4380462 Glass fiber apparatus and method |
| 03/29/1983 | US4378554 Fixed/movable supervised alarm loop |
| 03/01/1983 | US4375637 Integrated alarm, security, building management, and communications system |
| 02/17/1983 | WO1983000558A1 Radiation detection apparatus |
| 02/16/1983 | EP0072187A1 Method and apparatus for identifying the location of a change in state of a part of an electrical circuit |
| 02/15/1983 | US4374329 Smoke detector with test apparatus |
| 01/26/1983 | EP0070449A1 Method and device for increasing the reaction sensitivity and the disturbance security in a hazard, particularly a fire alarm installation |
| 01/26/1983 | EP0070364A2 Movement signalling device for space surveillance |
| 01/20/1983 | WO1983000179A1 Locking and unlocking device for objects, containers and premises |
| 01/18/1983 | US4369436 Anti-bridging cable supervision circuit |
| 01/18/1983 | US4369435 Fire detector and fire alarm system having circuitry to detect removal of one or more detectors at a signal station |
| 01/18/1983 | CA1139859A1 Alarm system |
| 01/05/1983 | EP0068050A1 Intruder detection apparatus |
| 12/22/1982 | EP0067339A2 Method and arrangement for disturbance detection in hazard signalling systems, especially fire signalling systems |
| 12/15/1982 | EP0066879A1 Circuit arrangement for the transmission of measured values to a central station, especially for a fire signalling system |
| 12/15/1982 | EP0066737A1 Circuit arrangement for the transmission of measured values to a central station, especially for a fire signalling system |
| 12/08/1982 | EP0066363A1 Microprocessor-controlled fire sensor |
| 12/08/1982 | EP0066200A1 Method and device for revision in a hazard, particularly a fire alarm system |
| 12/07/1982 | US4363030 Fail-safe instrument system |
| 11/30/1982 | US4361730 Security terminal for use with two-way interactive cable system |
| 11/17/1982 | EP0064525A1 Security alarm systems |
| 11/03/1982 | EP0063876A1 Alarm system and a sensor module therefor |
| 11/02/1982 | CA1134923A1 Line supervision |
| 10/26/1982 | US4356485 Device for the signal-technical secure control and monitoring of electrical loads |
| 10/26/1982 | US4356474 Alarm system |
| 10/12/1982 | US4354181 Vapor lamp indicating device |
| 10/12/1982 | US4354180 Electro-optical liquid level sensor |
| 09/01/1982 | EP0058824A2 Apparatus for maintaining the alarm condition of a gas detector |
| 08/31/1982 | CA1130885A1 Security system |
| 08/24/1982 | US4346371 Alarm circuit |
| 07/20/1982 | CA1128165A1 Fibre optic security system |
| 07/07/1982 | EP0055319A1 Smoke detector of the light diffusion type with self-checking |
| 07/06/1982 | US4338601 Apparatus for the storage and transfer of information |
| 06/23/1982 | EP0054407A1 Load current protection circuit |
| 06/22/1982 | US4336455 Smoke detectors |
| 05/27/1982 | WO1982001781A1 Security alarm systems |
| 05/25/1982 | US4331952 Redundant sensor adapter |
| 05/25/1982 | CA1124352A1 High line security for alarm systems |
| 05/25/1982 | CA1124078A1 Orifice plates for glass fiber drawing bushing |
| 05/11/1982 | US4329643 Portable circuit testing system |
| 04/13/1982 | US4325089 System for safeguarding magnetically recorded data |
| 04/07/1982 | EP0049202A1 Self monitoring electronic system |
| 03/23/1982 | US4321466 Sensitivity test system for photoelectric smoke detector by changing light source intensity |
| 03/02/1982 | US4318093 Logic circuit monitor |
| 03/02/1982 | US4318092 Means for checking battery voltage level |
| 03/02/1982 | CA1119269A1 Smoke detector with test means for simulating a pre-determined percentage of smoke |
| 02/23/1982 | CA1118865A1 Quasi-stationary noise cancellation system |
| 02/16/1982 | US4316185 Battery monitor circuit |
| 01/13/1982 | EP0043747A1 Acoustic remote control device testable by means of supply voltage variation |
| 01/12/1982 | US4310835 Security equipment including trigger circuit |
| 01/12/1982 | CA1116319A1 Smoke detectors |
| 01/12/1982 | CA1116264A1 Method of transmitting a plurality of information signals on a common carrier frequency range from different transmitters to a receiver |
| 01/05/1982 | US4309695 Electronic alarm circuit |
| 12/30/1981 | EP0042501A1 Device for the transmission of measured values in a fire warning system |
| 12/29/1981 | US4308531 Light transmission type smoke detector |
| 12/29/1981 | CA1115372A1 Multi-function combustion detecting device |
| 12/22/1981 | US4307388 Arrangement in order to prevent false alarms of a passive infrared motion alarm |
| 12/22/1981 | US4306575 Smoke detector tester |
| 12/15/1981 | US4306230 Self-checking photoelectric smoke detector |
| 11/24/1981 | US4302753 Multi-function combustion detecting device |
| 11/24/1981 | US4301674 Smoke detector tester |
| 11/18/1981 | EP0039761A2 Fire annunciating arrangement and method |
| 10/27/1981 | US4297633 Electric fence monitoring system with energizer, responder and receiver |
| 10/13/1981 | US4295132 Capacitance intrusion detection system |
| 09/29/1981 | US4292628 Fibre optic security system |
| 09/15/1981 | US4290057 Sequential power distribution circuit |
| 09/01/1981 | US4287517 Circuit for eliminating low battery voltage alarm signal at night |
| 09/01/1981 | US4287515 Fire detection system with multiple output signals |
| 08/25/1981 | CA1107839A1 Latching alarm smoke detector |
| 08/19/1981 | EP0034031A1 Electricity meters |
| 08/19/1981 | EP0033888A2 Ionisation fire alarm device with malfunction signalization |
| 08/11/1981 | US4283717 Monitoring system for a direct-wire alarm system |
| 08/04/1981 | US4282520 Piezoelectric horn and a smoke detector containing same |
| 07/29/1981 | EP0032593A2 Alarm, security and monitoring apparatus |
| 07/15/1981 | EP0032135A2 Monitoring apparatus |
| 07/01/1981 | EP0031046A2 Device for data secure control and supervision of electric equipments |
| 06/30/1981 | US4276545 Door activated burglar alarm utilizing time delay |
| 06/25/1981 | WO1981001765A1 Self-checking photoelectric smoke detector |
| 06/23/1981 | CA1103777A1 Back up alarm system |
| 06/16/1981 | US4274086 Security alarm system |
| 06/09/1981 | US4271693 Device for testing smoke detector alarms |
| 05/26/1981 | US4270121 Circuitry for burglar alarm annunciator |
| 05/19/1981 | US4268823 Protective electrical system for providing indications of removal of objects from plural monitored locations by use of parallel-connected object-sensors |