| Patents for G08B 17 - Fire alarms; Alarms responsive to explosion (10,975) |
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| 09/08/1981 | US4288694 High-impedance IGFET input circuit suitable for smoke detector I.C. |
| 09/01/1981 | US4287517 Circuit for eliminating low battery voltage alarm signal at night |
| 09/01/1981 | US4287516 Minimal energy dissipating detector |
| 09/01/1981 | US4287515 Fire detection system with multiple output signals |
| 09/01/1981 | CA1108266A1 Flame sensor |
| 08/26/1981 | EP0034562A2 Signal station for fire alarm system |
| 08/25/1981 | US4286160 Ionization particle detector |
| 08/25/1981 | US4286159 Detector coupling mechanism |
| 08/25/1981 | US4286117 Danger alarm system |
| 08/25/1981 | CA1107839A1 Latching alarm smoke detector |
| 08/25/1981 | CA1107573A1 Thermally responsive acoustic fire alarm assembly |
| 08/19/1981 | EP0033888A2 Ionisation fire alarm device with malfunction signalization |
| 08/18/1981 | US4284981 Sensor alarm and support |
| 08/18/1981 | CA1107373A1 Dual projected-beam smoke detector |
| 08/04/1981 | US4282520 Piezoelectric horn and a smoke detector containing same |
| 08/04/1981 | US4282519 Interconnection of alarms of smoke detectors with distinguishable alarms |
| 08/04/1981 | CA1106506A1 Ionization smoke detector having improved stability and sensitivity |
| 07/22/1981 | EP0032169A1 Signalling arrangement operating with electromagnetic radiation |
| 07/21/1981 | US4280058 Flame detector |
| 07/21/1981 | US4280052 Multiple chamber ionization detector |
| 07/14/1981 | US4278970 Alarm circuit for detecting overheated condition |
| 07/07/1981 | US4277782 Detection circuit and structure therefor |
| 07/01/1981 | EP0031096A1 Optical arrangement for a smoke detector using the light scattering principle |
| 06/30/1981 | CA1104271A1 Arrangement for inhibiting the effect of extraneous electric fields on an improved ionization smoke detector |
| 06/30/1981 | CA1104228A1 Discriminating fire sensor |
| 06/25/1981 | WO1981001765A1 Self-checking photoelectric smoke detector |
| 06/24/1981 | EP0030621A1 Ionisation smoke signaller with particular operational reliability |
| 06/23/1981 | US4275274 Audio visual monitoring system for announcing a message upon detection of a monitored condition |
| 06/23/1981 | CA1103779A1 Optical smoke detector |
| 06/02/1981 | US4271405 Alarm control system |
| 06/02/1981 | US4271360 Infra-red surveillance systems using multi-faceted mirror |
| 06/02/1981 | CA1102429A1 Optical fire-detector |
| 05/28/1981 | WO1981001369A1 Fire extinguishing apparatus |
| 05/26/1981 | US4270123 Detector for indicating a fire or detector malfunction |
| 05/26/1981 | US4269510 Smoke detector |
| 05/26/1981 | CA1102016A1 Adjustable ionization chamber |
| 05/26/1981 | CA1101963A1 Light scattering smoke detector |
| 05/19/1981 | USRE30620 High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means |
| 05/14/1981 | WO1981001330A1 Dual spectrum infared fire sensor |
| 05/05/1981 | US4266220 Self-calibrating smoke detector and method |
| 05/05/1981 | US4266219 Supervisory control system for a smoke detector |
| 05/05/1981 | US4266218 Alarm system control circuit |
| 05/05/1981 | US4265194 Fire alarm heat sensor |
| 04/28/1981 | US4264904 Fire and absence detection and alarm system for bed occupants |
| 04/28/1981 | US4264331 For air pollution, included fire combustion |
| 04/28/1981 | US4263930 Diffuser concealable, volume control, heat-responsive, semi-automatic resetting, butterfly damper and operator |
| 04/21/1981 | US4263588 Helmet-carried apparatus for detecting and signalling the presence of a dangerous gas in an atmosphere |
| 04/15/1981 | EP0026865A2 Arrangement for the removal of a fire-alarm unit from a socket |
| 04/14/1981 | US4262286 Apparatus for monitoring fire and effecting control operation |
| 04/07/1981 | US4260984 Count discriminating fire detector |
| 04/07/1981 | US4260981 Physical condition monitoring system for detection in remote places |
| 03/24/1981 | US4258360 Optical smoke detector |
| 03/24/1981 | US4258291 Smoke alarm activated portable lamp |
| 03/17/1981 | US4257039 Smoke detector |
| 03/17/1981 | CA1097710A1 Multi-stage heat sensing cable and emergency communications system |
| 03/10/1981 | US4255746 Emergency lighting and fire detector system |
| 03/05/1981 | WO1981000636A1 Detection device with detector |
| 03/04/1981 | EP0024370A2 Smoke and temperature sensitive fire signalling device |
| 03/03/1981 | US4254414 Processor-aided fire detector |
| 03/03/1981 | US4254411 Danger alarm system |
| 02/24/1981 | CA1096461A1 Optical smoke detector with conical light beam source |
| 02/24/1981 | CA1096450A1 Alarm driver for a smoke detector |
| 02/17/1981 | US4251811 Battery test system, as for smoke detector alarm |
| 02/10/1981 | US4250500 Smoke detector |
| 02/10/1981 | US4250464 Multi-mode relaxation oscillator |
| 02/10/1981 | US4250353 Danger alarm system |
| 02/10/1981 | CA1095638A1 Smoke detector |
| 02/03/1981 | US4249169 Optical smoke detector |
| 02/03/1981 | US4249168 Flame detector |
| 02/03/1981 | US4249082 Photoelectric smoke sensor box |
| 02/03/1981 | CA1095139A1 Alarm condition detecting apparatus and method |
| 01/27/1981 | US4247848 Fire detector with a monitor circuit |
| 01/27/1981 | US4247765 Pulsed feedback circuit for an optoelectronic detector |
| 01/21/1981 | EP0022438A1 Method for detecting aerosols in air of a control zone and apparatus for its performing |
| 01/20/1981 | US4246635 Power-supply device which boosts and stabilizes the voltage |
| 01/20/1981 | US4246572 Detection circuit with hysteresis |
| 01/20/1981 | US4245997 Detection of gas by color change, warning by an alarm when gas is above or below threshold |
| 01/20/1981 | US4245579 Pressurized fluid circuits |
| 01/20/1981 | CA1094158A1 Battery discriminator circuit for smoke detector |
| 01/20/1981 | CA1093902A1 Self-contained actuation and detection device |
| 01/13/1981 | US4245174 Dual ionization chamber |
| 01/07/1981 | EP0021671A1 A smoke detector |
| 01/07/1981 | EP0021190A1 Device for individually checking the exposure of a person to toxic gases |
| 01/07/1981 | EP0020674A1 Smoke detector operating with scattered radiation. |
| 01/07/1981 | EP0020602A1 Event detection and indication system |
| 01/06/1981 | US4243981 Ionization fire-signal device |
| 01/06/1981 | CA1093215A1 Charge-flow transistor and instrument employing the same |
| 12/30/1980 | US4242673 Optical particle detector |
| 12/23/1980 | US4241282 Smoke detector with bimetallic element for temperature compensation |
| 12/23/1980 | US4241258 Ultraviolet fire detector |
| 12/16/1980 | US4240077 Thermostat |
| 12/16/1980 | CA1091826A1 Ionisation detector chamber |
| 12/16/1980 | CA1091823A2 Ionization detector |
| 12/16/1980 | CA1091822A1 Smoke detector ionization chamber |
| 12/09/1980 | US4238788 System for detecting a combustion process |
| 12/09/1980 | US4238679 Dual-chamber ionization smoke detector assembly |
| 12/09/1980 | US4238677 Smoke detector by ionization associated to a velocimetric measurement electronic circuit |
| 12/02/1980 | US4237453 Smoke detection system and method |
| 12/02/1980 | US4237452 Smoke detection system and method |
| 12/02/1980 | US4236822 Fire detector housing |