| 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) |
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| 06/21/1994 | USRE34643 Short circuit fault isolation means for electrical circuit arrangements |
| 06/21/1994 | US5323145 Alarm collection architecture with redundant bus |
| 06/09/1994 | DE4240395A1 Electromagnetic radiation detector, e.g for flame detection - includes opto-electronic sensor, and evaluates soiling level of transparent cover plate to correct sensor element output signal |
| 06/01/1994 | EP0598963A1 Electrical monitoring system |
| 06/01/1994 | DE4314282C1 Radio antitheft alarm, e.g. for home - has optical or electrical sensors to detect fire or break-in and transmits alarm signal via transceiver antennae |
| 05/28/1994 | CA2083990A1 Device for testing heat detectors, smoke detectors and smoke alarms |
| 05/19/1994 | DE4306425C1 Movement detector for burglar alarm system - is combined with range measuring system for monitoring detector position, to prevent sabotage |
| 05/11/1994 | EP0596500A1 Smoke detecting apparatus for fire alarm |
| 05/10/1994 | US5311167 UV/IR fire detector with dual wavelength sensing IR channel |
| 05/04/1994 | EP0595327A2 Battery detecting device for a radio pager |
| 05/03/1994 | US5309148 Apparatus and method for testing smoke detector operation |
| 05/03/1994 | CA1329237C Paging apparatus with improved message display function |
| 04/27/1994 | EP0594288A1 Smoke detector with capacitor back-up |
| 04/14/1994 | DE4233664A1 Alarm system using halogen floodlight - has floodlight with housing having emitter connected to current supply, protects outside areas and triggers alarm on unauthorised tampering of floodlight |
| 03/29/1994 | CA1328122C Device for sensing continuity in a circuit having an open circuited apparatus |
| 03/24/1994 | DE4231290A1 Intruder alarm control covering several alarm points - classifies detected alarm signals into different groups assigned respective false alarm frequencies to prevent unnecessary call-outs |
| 03/23/1994 | EP0587899A1 Fire alarm |
| 03/23/1994 | EP0587898A1 Fire alarm |
| 03/23/1994 | EP0298132B1 Facility for prevention of disasters |
| 03/22/1994 | CA2007777C Portable alarm system with sealed enclosure |
| 03/10/1994 | DE4307585C1 Compensating for air humidity in stray light signal unit for fire alarm system - contg. first light transmitter with associated optic and light receiver with associated optic with its output signal representing measured value of smoke density |
| 03/08/1994 | US5293155 Interface for a supervised multi-input audible warning system |
| 03/01/1994 | US5290639 Battery socket for smoke detector |
| 03/01/1994 | CA2077228A1 Smoke detector with capacitor back-up |
| 02/02/1994 | EP0581399A1 Signaling system |
| 02/02/1994 | EP0581248A1 Short circuit detector and isolator |
| 02/01/1994 | US5283546 Vandal-resistant call box |
| 01/26/1994 | EP0580110A1 Smoke detecting apparatus for fire alarm |
| 01/18/1994 | US5280273 Toxic gas detector system having convenient battery and sensor replacement |
| 01/18/1994 | CA2013610C Scheme for power conservation in fire alarm system |
| 01/17/1994 | WO1994018546A1 Improved diffusion-type gas sample chamber |
| 01/12/1994 | EP0578189A1 Optic smoke detector |
| 01/05/1994 | EP0577045A1 Smoke detecting apparatus for fire alarm |
| 01/04/1994 | US5276427 Auto-adjust motion detection system |
| 12/29/1993 | EP0575912A1 Method and device for verifying functioning of a detection system with sensor |
| 12/23/1993 | WO1993025986A1 Apparatus and method for a smoke alarm device with integrated testing circuits |
| 12/14/1993 | US5270811 Telemetry monitoring method and device therefor for transmitting information by means of asynchronous transfer mode technique in broadband ISDN |
| 12/09/1993 | WO1993022630A3 Device for testing the operability of a system for detecting heat-radiating particles carried in a particle stream |
| 12/09/1993 | DE4218520A1 Alarm against forced entry into closed room - has switching unit, rechargeable battery, and acoustic generator in stable, lockable, sheet metal housing |
| 12/08/1993 | CN2148988Y Anti-misalarming program controller for anti-theft alarm system |
| 12/01/1993 | EP0572204A1 Method and apparatus for automated sensor diagnosis |
| 12/01/1993 | EP0571841A1 Sensitivity measuring apparatus for use with a fire detector |
| 11/23/1993 | US5264833 Automatic leak detector |
| 11/23/1993 | US5264708 Flame detector |
| 11/11/1993 | WO1993022630A2 Device for testing the operability of a system for detecting heat-radiating particles carried in a particle stream |
| 11/10/1993 | CN2146035Y Pulse modulation low power consumption interlock alarm controller |
| 11/09/1993 | US5260687 Combined method of determining fires |
| 11/09/1993 | US5260664 Network monitor and test apparatus |
| 11/03/1993 | EP0568137A1 A mounting structure for an electrical apparatus having a device indicating removal of same |
| 09/30/1993 | DE4303388A1 Closed from surveillance system - monitors opening or destruction of doors or windows and movement of people in room and sets off alarm |
| 09/29/1993 | EP0562960A1 Surveillance and alarm device for monitoring and control system |
| 09/21/1993 | US5247283 Method for testing smoke sensor and a smoke sensor having a function of executing the test |
| 09/15/1993 | EP0333771B1 Personal alarm system |
| 09/07/1993 | US5243330 Fire detector system and method |
| 09/07/1993 | US5243326 Device for protecting components of security systems against obstruction |
| 09/07/1993 | US5243152 Sound anti-muffler for a sound generator |
| 08/26/1993 | DE4210848A1 Safety device, esp. for protecting people and objects from dangerous parameters - has comparator between measuring sensor and display, and displays at least two active states of comparison signal |
| 08/25/1993 | EP0556898A1 Intrusion alarm system |
| 08/25/1993 | CN1075549A Improved gas sample chamber |
| 08/24/1993 | US5239459 Automated assessment processor for physical security system |
| 08/24/1993 | US5238184 Controlling HVAC equipment |
| 08/17/1993 | US5237518 Optimization method for adaptive sensor reading scheduling and delayed alarm evaluation in real-time diagnostic systems |
| 08/17/1993 | US5237330 Intrusion detection device |
| 08/17/1993 | US5237307 Non-contact tamper sensing by electronic means |
| 08/17/1993 | CA1321417C Apparatus and method for protecting the contacts of an electrical switch from current surges |
| 08/12/1993 | DE4202759A1 Empfangsvorrichtung zum empfang von drahtlos uebermittelten informationen Receiving means for receiving wirelessly sent through information |
| 08/05/1993 | WO1993015578A1 Fire alarm |
| 08/05/1993 | WO1993015577A1 Fire alarm |
| 08/05/1993 | WO1993015486A1 Receiver for the reception of wirelessly transmitted information |
| 08/05/1993 | DE4303048A1 Alarm recognition apparatus for redundant layout circuit in radio equipment - has input circuits delaying alarm recognition signals when circuits are switched to be operational systems |
| 07/27/1993 | US5231594 Maintenance monitoring system |
| 07/14/1993 | EP0551183A1 Detecting and alarm system for detecting short-circuited or broken circuit |
| 07/08/1993 | WO1993013401A1 Multi-channel gas sample chamber |
| 07/08/1993 | CA2127106A1 Multi-channel gas sample chamber |
| 07/07/1993 | EP0549888A1 Fire detector |
| 07/06/1993 | US5224430 Security enclosures |
| 06/29/1993 | US5222389 Multi-channel gas sample chamber |
| 06/29/1993 | CA1319742C Disaster prevention monitoring and control facility |
| 06/23/1993 | EP0547458A1 Radio alarm system |
| 06/08/1993 | US5218353 Display device for a recording device capable of displaying a plurality of operating states or conditions in effect |
| 06/01/1993 | US5216410 Intrusion alarm sensing unit |
| 05/27/1993 | DE4139222A1 Detection unit for objects of all kinds using light sources and receivers - produces common output signal from receiver signals connected to inputs of three comparators and switching points arranged in specific relationship |
| 05/26/1993 | WO1993011418A1 Improved gas sample chamber |
| 05/25/1993 | US5214577 Automatic test generation for model-based real-time fault diagnostic systems |
| 05/18/1993 | US5212470 Supervised fire alarm system |
| 05/11/1993 | US5210523 Fire detection system |
| 05/11/1993 | CA1317653C False alarm minimization and direction determination methods |
| 05/05/1993 | EP0540139A2 Improvements in security enclosures |
| 04/29/1993 | WO1993008550A1 Fire detector and a method of detecting a fire |
| 04/21/1993 | CN1020356C Simulative interference video signals generator |
| 04/06/1993 | US5200734 Detecting and alarming system for detecting shortcircuited or broken circuit |
| 04/01/1993 | WO1993006462A1 Smoke and particle detector |
| 03/31/1993 | CA2079040A1 Thermostat having simple battery level detection |
| 03/23/1993 | CA1314957C Intrusion detection system and a method therefor |
| 03/09/1993 | US5191855 Battery missing indicator |
| 03/03/1993 | EP0529627A1 Alarm sounding apparatus for computer |
| 02/23/1993 | US5189400 Communication device capable of preventing energy source removal |
| 02/23/1993 | US5189399 Method of operating an ionization smoke alarm and ionization smoke alarm |
| 02/23/1993 | US5189393 Dual technology motion sensor |
| 02/18/1993 | DE4127004A1 Early fire detection arrangement - contains combination of sensors, microprocessor-controlled signal evaluation unit, fuzzy logic or neural network to avoid false alarms |