Patents
Sitemap › G08 - Signalling › G08B - Signalling or calling systems; Order telegraphs; Alarm systems › G08B 17 - Fire alarms; Alarms responsive to explosion
Patents for G08B 17 - Fire alarms; Alarms responsive to explosion (10,975)
11/1978
11/14/1978CA1042564A1 Ionization type smoke sensor
11/07/1978US4124298 Optical smoke detector inlet screen
11/07/1978CA1042088A1 Fire detectors
10/1978
10/31/1978US4123656 Storage type smoke detector
10/31/1978CA1041678A1 Ionization-type fire or smoke sensing system
10/24/1978US4121533 Thermally responsive acoustic fire alarm assembly
10/17/1978US4121110 Optically biased smoke detector
10/17/1978US4121105 Ionization detector
10/10/1978US4119949 Fire detector utilizing two bandwidths of radiation
10/03/1978US4118689 Smoke detector
09/1978
09/05/1978US4112407 Fire sensing device
09/05/1978US4112310 Smoke detector with photo-responsive means for increasing the sensitivity during darkness
08/1978
08/22/1978US4109240 Ionization-type fire sensing system
08/01/1978US4104628 High output audible alarm device utilizing a piezoelectric transducer and voltage doubling means
08/01/1978US4104619 Smoke detector
08/01/1978US4104618 Remote signaling system
08/01/1978US4103997 Light scattering type smoke detector
07/1978
07/18/1978US4101872 Fire detection system
07/18/1978US4101785 Smoke detector with switch means for increasing the sensitivity
07/18/1978US4101767 Discriminating fire sensor
07/11/1978US4099292 Telescoping heat responsive releasing means
07/04/1978US4099165 Fire detection apparatus in a preheater
07/04/1978US4099065 Smoke detector with chamber for producing eddy currents
07/04/1978US4098220 Alarm
06/1978
06/27/1978US4097851 Sensitivity compensated fire detector
06/20/1978US4096473 High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means
06/06/1978US4093943 Sequential power distribution circuit
06/06/1978US4093886 Aerosol detection device
05/1978
05/30/1978US4091874 Fire extinguishing method and system for large buildings
05/23/1978US4091364 Combustion detection device
05/23/1978US4091363 Self-contained fire detector with interconnection circuitry
05/16/1978US4090178 Combination smoke detector and lamp structure
05/16/1978US4090177 Early fire compound sensing system and apparatus
05/09/1978US4088986 Smoke, fire and gas alarm with remote sensing, back-up emergency power, and system self monitoring
05/02/1978US4087799 Particulate products of combustion detector employing solid state elements
04/1978
04/25/1978US4086574 Fire detection system
04/25/1978US4086573 Alarm control device
04/11/1978US4084157 Smoke and heat detector alarm
04/11/1978US4084156 Voltage monitoring circuit
04/04/1978US4083037 Detection circuit
04/04/1978US4082952 Ion detector
04/04/1978US4081964 Apparatus for the thermal and electrical initiation of fire protection devices
03/1978
03/28/1978US4081795 Apparatus and method for detecting the occurrence of an alarm condition
03/28/1978US4081684 Combustion product detector
03/14/1978USRE29580 Integrated fully supervised fire alarm system
03/14/1978US4079363 Double-detecting loop type alarm system
03/14/1978US4079271 Alarm driver for a smoke detector
02/1978
02/21/1978US4075616 Detector for alarm system
02/21/1978US4075614 Christmas tree fire detector and alarm
02/21/1978US4075499 Smoke detector with means for changing light pulse frequency
02/21/1978US4075487 Ionization chamber assembly
02/21/1978US4074388 Resettable, heat actuatable fire link
02/14/1978US4074341 Interlocked separable fire sensor construction
02/14/1978US4074248 Dual operating control circuits for intrusion detection systems
02/14/1978US4074243 Anticipatory flammable gas detection system
02/14/1978US4074225 Emergency detection alarm and evacuation system
02/07/1978US4072933 Fire heat detector and/or burglar alarm
01/1978
01/17/1978US4069018 Explosive gas monitoring method and apparatus
01/10/1978US4068130 Smoke detector with means for changing light pulse frequency
01/03/1978US4067004 Remote personnel station alarm system
12/1977
12/27/1977US4065759 Smoke detector
12/27/1977US4065758 Alarm detector responsive to rate of change of a monitored condition
12/13/1977US4063227 Smoke detector
11/1977
11/15/1977US4058803 Duplex ionization-type fire sensor
11/15/1977US4058777 Oscillating circuit
11/01/1977US4056815 Battery operated transmitter circuit
11/01/1977US4056727 Attachment means of an object to a support
10/1977
10/25/1977US4055844 Detection system
10/11/1977US4053825 Ionization chamber type gas leak detector operating in the high voltage avalanche region
10/11/1977US4053785 Optical smoke detector with smoke effect simulating means
10/11/1977US4053777 Accident- and tampering-proof attachment means of an object to a stationary support
10/11/1977US4053776 Sub-micron particle detector
10/04/1977US4052720 Dynamic sound controller and method therefor
10/04/1977US4052716 Fire and intruder detection and alarm apparatus
09/1977
09/27/1977US4051467 Fluid flow detector for a fire alarm system
09/06/1977US4047165 Emergency signal light
08/1977
08/23/1977US4044263 Ionization dual-zone static detector having single radioactive source
08/23/1977US4044262 Ionization smoke sensor
08/16/1977US4041570 Resettable, heat actuatable fire link
08/09/1977US4041479 Output circuit of an ionization smoke sensor
07/1977
07/26/1977US4038649 Smoke detection alarm device
07/26/1977US4037463 Temperature-detecting element
07/19/1977US4037206 Ionization smoke detector and alarm system
07/19/1977US4037106 Ionization-type fire or smoke sensing system
07/12/1977US4035788 Incipient fire detector
06/1977
06/14/1977US4030095 Pulsed alarm system
06/14/1977US4030087 Anti-theft alarm system
06/14/1977US4030086 Battery voltage detection and warning means
05/1977
05/31/1977US4027302 Double detection circuit for conserving energy in fire detection systems and the like
05/31/1977US4027165 Ionization detection system for aerosols
05/24/1977US4025915 LED smoke detector circuit
05/24/1977US4025892 Probe for detecting gaseous polar molecules such as water vapor
05/10/1977US4023164 Heat detection and alarm system
05/10/1977US4023152 Ionization type smoke sensing device
05/10/1977US4022148 Portable fire alarm
05/03/1977US4021792 Smoke alarm
05/03/1977US4021671 Ionization detector
04/1977
04/26/1977US4020480 Catalytic detecting apparatus for detecting combustible gases and vapors
04/26/1977US4020479 Fire detector
04/26/1977US4020442 Composite-type heat-system fire sensing device
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