Photoelectric Patents (Class 340/630)
  • Patent number: 10373487
    Abstract: The present embodiment provides a lighting control system including visible light communication modules separately corresponding to lighting devices, each visible light communication module including a body, and a pair of a light-emitting element and a light-receiving element provided on each of a plurality of outer surfaces of the body. Efficient visible-light-based lighting control services may be provided by transmitting or receiving visible light communication data for controlling lighting devices, to or from other visible light communication modules of front, rear, left, and right directions using the pair of the light-emitting and light-receiving elements.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: August 6, 2019
    Assignee: YUYANG DNU CO., LTD
    Inventors: Sangok Kim, Byungoh Kim, Dongsik Kim, Hyun-cheol Shim, Sang-ho Yoon
  • Patent number: 10282956
    Abstract: Smoke detectors and smoke alarms are provided which have one or more light shields configured to block or minimize the transmission of ambient light to their light receivers. Light shield configurations for facilitating such functionality are provided as well. The shield/s include a material which attenuates a majority amount of light within a particular range of light that a light source of the smoke detector may be configured to only emit and/or the range of light the light receiver may configured to only convert to photocurrent. In some cases, the shield/s surrounds the light source and/or the light receiver arranged external to an interior chamber of the smoke detector. In some cases, the shield/s may at least partially span a connection side of an external housing of the smoke detector. Alternatively, the shield may be arranged in a space between the interior chamber and the connection side of the housing.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: May 7, 2019
    Assignee: Xenex Disinfection Services, LLC.
    Inventors: Mark A. Stibich, Sarah E. Simmons, Edward C. Guerrero, Jr., Paul P. Froutan, Nicholas Whitelonis, Joseph Taber
  • Patent number: 10234388
    Abstract: A system including a first information acquisition unit configured to acquire first information indicating a detection value of a first physical quantity in a monitored area, a second information acquisition unit configured to acquire second information indicating a detection value of a second physical quantity different from the first physical quantity, in the monitored area, and a determination unit configured to determine whether an abnormality has occurred in the monitored area, based on the detection value of the first physical quantity indicated by the first information, the detection value of the second physical quantity indicated by the second information, a first coefficient corresponding to the detection value of the first physical quantity and the detection value of the second physical quantity, and a first threshold.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: March 19, 2019
    Assignee: HOCHIKI CORPORATION
    Inventors: Hiromichi Ebata, Atsushi Mammoto
  • Patent number: 10119884
    Abstract: The present disclosure relates to a water detection device that includes a water-activated battery configured to switch from a dormant condition to an active condition upon contact with water, such that the water-activated battery supplies an electrical voltage upon contact with the water, an electronic circuit configured to receive the electrical voltage from the water-activated battery, where the electronic circuit is configured to communicate with an external, electronic device via one or more wireless communication techniques when the electronic circuit is powered by the electrical voltage, and where communication between the electronic circuit and the external, electronic device is an uninterrupted communication when the electronic circuit is receiving the electrical voltage from the water-activated battery, and a housing configured to receive the water-activated battery and the electronic circuit, where the housing has passageways configured to facilitate movement of the water into the housing and towar
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: November 6, 2018
    Assignee: United Services Automobile Association (USAA)
    Inventors: Bradly Jay Billman, Kade Scott, Matthew T. Flachsbart, Cory Matheson, Benjamin D. Ethington
  • Patent number: 10037665
    Abstract: A method for detecting smoke via a chamber-less smoke sensor includes applying one or more filters to eliminate a flooding of ambient light upon the smoke sensor and emitting, by a source, light. At least one detector detects at least a portion of the emitted light and a processor processes the detected light to signal an alarm condition when one or more threshold levels are reached. A chamber-less smoke sensor includes a light source configured to emit light and at least one detector configured to detect at least a portion of the emitted light. An electronic filter and/or a processor is configured to apply one or more filters to eliminate a flooding of ambient light upon the smoke sensor and process the detected light to signal an alarm condition when a threshold level is reached.
    Type: Grant
    Filed: March 6, 2017
    Date of Patent: July 31, 2018
    Assignee: CARRIER CORPORATION
    Inventors: Anis Zribi, Travis Silver, Ken Fasen, Anthony Joseph Santistevan, Larry R. Ratzlaff, Valeriy Miagkov, Stanley D. Burnette, Vipul Patel, Charles Edmund Murphy, Jr.
  • Patent number: 9995726
    Abstract: One object is to provide a lubricant deterioration sensor that can maintain accuracy of sensing the deterioration of a lubricant having low transmissivity and an optical sensor used therein for sensing the amount of received light. The lubricant deterioration sensor is used for determining deterioration state of a lubricant. The lubricant deterioration sensor includes an optical sensor having: an LED for emitting detection light; an oil entering gap in which the detection light passes through a lubricant to be inspected; a color sensor for sensing color information of the detection light having passed through the lubricant; and a logarithmic amplifier for logarithmically amplifying the detection value sensed by the color sensor and outputting the amplified detection value.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: June 12, 2018
    Assignee: NABTESCO CORPORATION
    Inventors: Takuya Shirata, Yasuhito Ida
  • Patent number: 9905102
    Abstract: An open scattered light smoke detector for detecting smoke may include a light transmitter for emitting light, a light receiver spectrally matched to the light transmitter, and a control unit configured to repeatedly actuate the light transmitter, with a pulsed signal sequence, to emit corresponding light pulses, evaluate temporally a signal sequence received by the light receiver, and output a fire alarm if a received signal strength exceeds a minimum value for the smoke concentration. The control unit may be configured to switch the detector from a normal operating mode into a service mode if a phase angle between an emitted and received signal sequence, as determined on the detector side, increases by a minimum angular value which, in terms of the travel time, corresponds technically to an increase in the optical path length from the light transmitter to the light receiver of more than some predefined distance.
    Type: Grant
    Filed: May 6, 2016
    Date of Patent: February 27, 2018
    Assignee: SIEMENS SCHWEIZ AG
    Inventor: Martin Fischer
  • Patent number: 9892621
    Abstract: Systems and methods for using state machines to manage alarming states and pre-alarming states of a hazard detection system are described herein. The state machines can include one or more sensor state machines that can control the alarming states and one or more system state machines that can control the pre-alarming states. Each state machine can transition among any one of its states based on raw sensor data values, filtered sensor data values, and transition conditions. Filters may be used to transform raw sensor values into filtered values that can be used by one or more state machines. Such filters may improve accuracy of data interpretation by filtering out readings that may distort data interpretation or cause false positives. For example, smoke sensor readings may be filtered by a smoke alarm filter to mitigate presence of steam.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: February 13, 2018
    Assignee: GOOGLE LLC
    Inventors: Kevin Charles Peterson, Yoky Matsuoka, Nicholas Unger Webb
  • Patent number: 9767665
    Abstract: An optical smoke detection unit, e.g., for a smoke detector, may include first and second light-emitting diodes for emitting monochromatic, dichromatic or polychromatic light, an optical receiver for smoke detection, and a control unit that controls the light-emitting diodes and evaluates a receive signal output by the optical receiver for fire parameters. The light-emitting diodes may be optically coupled together such that at least one of the light-emitting diodes illuminates the other. The control unit may control one light-emitting diode in an alternating fashion and switch the other light-emitting diode to operate as a photodiode, and simultaneously detect a photoelectric current as a measure of emitted luminous flux of the controlled light-emitting diode.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: September 19, 2017
    Assignee: SIEMENS SCHWEIZ AG
    Inventors: Martin Allemann, Aleksandar Duric
  • Patent number: 9659485
    Abstract: A device and method for self-testing fire detection devices that includes a smoke source housed within the fire detection device. The smoke source is typically a pressurized canister or cartridge, which stores or generates smoke or a smoke equivalent. In response to a signal from a controller, the smoke source releases the smoke or smoke equivalent in or near a sampling volume of the fire detection device to test the operation of the fire detection device. If the device is operating properly, it will be triggered in response to the smoke or a smoke equivalent.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: May 23, 2017
    Assignee: Tyco Fire & Security GmbH
    Inventor: Joseph Piccolo, III
  • Patent number: 9633553
    Abstract: Systems and methods for compensating for sensor drift of a smoke sensor are described herein. Sensor drift may be caused by accumulated buildup of dust or other particulates within an enclosure of the smoke sensor. Embodiments described herein can account for sensor drift by adjusting a clear air offset value.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: April 25, 2017
    Assignee: GOOGLE INC.
    Inventors: Eli Sangha, Andrew W. Goldenson
  • Patent number: 9472079
    Abstract: There is provided a method to enable selective smoke detection sensitivity onboard an aircraft. The method has the step of installing one or more sensitivity selectable smoke detector assemblies. The method further has the step of electrically or wirelessly coupling the one or more sensitivity selectable smoke detector assemblies installed onboard the aircraft to one or more sensitivity selector controls installed onboard the aircraft. The method further has the step of selecting an alarm setpoint sensitivity level from two or more alarm setpoint sensitivity levels for each of the one or more sensitivity selectable smoke detector assemblies, based on sensitivity level determination factors of one or more of a mission type of the aircraft, a cargo type on the aircraft, a compartment zone specific area type on the aircraft, and an occupancy state on the aircraft.
    Type: Grant
    Filed: October 12, 2014
    Date of Patent: October 18, 2016
    Assignee: The Boeing Company
    Inventor: Oliver C. Meier
  • Patent number: 9396637
    Abstract: A smoke detector is disclosed that comprises a smoke detection chamber comprising: a light source operable to provide radiation to an interior space of the smoke detection chamber, and a light detector operable to receive radiation scattered by one or more radiation scatting particles in the interior of the smoke detection chamber; an alarm control module, in communication with the smoke detection chamber and a processor, operable to produce an alarm indicating a presence of a predetermined threshold of the one or more radiation scattering particles; a computer readable medium comprising instructions that when executed by the processor, cause the detector to perform an alarm compensation threshold method comprising: comparing a calibrated clear air voltage measurement with an average clear air voltage measurement; adjusting an alarm threshold sensitivity, based at least in part, on the comparison of the calibrated clear air voltage measurement and the average clear air voltage measurement.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: July 19, 2016
    Assignee: WALTER KIDDE PORTABLE EQUIPMENT, INC
    Inventors: Bill Chandler, Larry R. Ratzlaff, Dave Bush
  • Patent number: 9355542
    Abstract: An integral testing system for testing OFDs is provided. The OFD may comprise a body, a detector, and an infrared source. The detector and the infrared source may be housed with the body. The infrared source may be configured to generate emissions having one or more infrared wavelengths that are detectable by the detector. The infrared source may be configured to produce infrared emissions to simulate flaming fire.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: May 31, 2016
    Assignee: Kidde Technologies, Inc.
    Inventors: Ken Bell, Robert Thebert
  • Patent number: 9349279
    Abstract: Systems and methods for compensating for sensor drift of a smoke sensor are described herein. Sensor drift may be caused by accumulated buildup of dust or other particulates within an enclosure of the smoke sensor. Embodiments described herein can account for sensor drift by adjusting a clear air offset value.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: May 24, 2016
    Assignee: GOOGLE INC.
    Inventors: Eli Sangha, Andrew W. Goldenson
  • Patent number: 9214681
    Abstract: The present invention concerns a power supply (10) comprising a primary cell (11) adapted to provide a primary cell current. The primary cell (11) comprises an anode, a cathode current collector and an electrolyte, whereby a passivation layer is formed on a surface of the anode as a result of a chemical reaction between the anode and the electrolyte. To ensure that the passivation layer remains essentially intact for the lifetime of the primary cell, the power supply (10) further comprises a current limiter (12) that is configured to prevent the magnitude of the primary cell current exceeding a value that would damage the passivation layer.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: December 15, 2015
    Assignee: AKTIEBOLAGET SKF
    Inventors: Frank de Wit, Florin Tatar
  • Patent number: 9146153
    Abstract: Disclosed is a photo sensor package for lighting, which is configured such that a micro control unit having a lighting control function as well as a timer function is integrated with a remote control element receiving a remote control signal of a lighting fixture. The photo sensor package includes a housing molded using infrared transmissible resin, a remote control element configured to receive an infrared signal, an amplification element configured to amplify a signal that is output from the remote control element, and a micro control unit configured to control a lighting fixture in response to a signal that is output from the amplification element. All of the remote control element, the amplification element, and the micro control unit are mounted on one lead frame and accommodated in the housing in such a way as to be integrated into a single structure.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: September 29, 2015
    Assignees: RAYTRON CO., LTD
    Inventor: Hyun Young Lee
  • Patent number: 9121775
    Abstract: In a system for attaching and fixing a temperature sensor, e.g., an NTC element, the NTC element is accommodated in a pressure connector section of a sensor housing. The area of the head of the temperature sensor is flanked and/or supported by guide vanes, which cause the incident flow in the area of the head of the temperature sensor to be accelerated.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: September 1, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Christoph Gmelin, Reinhold Herrmann
  • Patent number: 9098989
    Abstract: A method evaluates two scattered-light signals in a hazard alarm operating in accordance with the scattered light principle. The particles to be detected are irradiated with light in a first wavelength range and with light in a second wavelength range. The light scattered by the particles is converted into a first and second non-normalized scattered light signal. The two scattered light signals are normalized in relation to one another such that their amplitude curve approximately coincides for larger particles such as dust and steam. The two normalized scattered light signals are transformed into a polar angle and a distance as polar coordinates of a polar coordinate system. Finally a respective smoke density signal and a respective dust/steam density signal is formed from a current distance value, wherein for this purpose the respective current distance values, depending on a current polar angle value, are weighted in opposition to one another.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: August 4, 2015
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Martin Fischer
  • Patent number: 9098987
    Abstract: A smoke detector with a transmitter (4) for a radiation that can be detected by a receiver (5), the transmitter (4) and the receiver (5) are to be assigned a monitored region (11).
    Type: Grant
    Filed: July 25, 2013
    Date of Patent: August 4, 2015
    Assignee: SCHAKO KLIMA LUFT Ferdinand Schad KG
    Inventor: Rainer Mueller
  • Patent number: 9098988
    Abstract: A device and method for manufacturing an integrated smoke cell are presented. The smoke cell includes an integral housing with a ceiling portion and a smoke permeable wall forming a chamber when mounted on a printed circuit board. An emitter and detector are mounted above apertures in the chamber ceiling so the emitter and detector are mounted substantially outside the chamber while detecting smoke present within the chamber without blocking ingress of smoke through the chamber wall.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: August 4, 2015
    Assignee: Excelitas Technologies Philippines Inc.
    Inventors: Jin Han Ju, Arthur John Barlow
  • Patent number: 9075007
    Abstract: An optical smoke detector designed for the mining industry that includes an active sampling component and a unique air flow system to reduce the environmental impact of underground mining. The active sampling smoke detector may include an intake fan, an optical sensing unit, an air path between the intake fan and the optical sensing unit, and a controller operatively connected to the intake fan and the optical sensing unit, the controller being configured to regulate fan speed and output at least one signal indicative of air quality passing through the optical sensing unit.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 7, 2015
    Assignee: AMERICAN MINE RESEARCH, INC.
    Inventor: Nicholas McKendree
  • Patent number: 9053620
    Abstract: A fire detector has a detection unit working on the optical scattered-light principle, as well as an electronic evaluation unit. An acoustic and/or optical warning device outputs an acoustic and/or optical alarm when a fire is detected. The fire detector has an energy storage device, in particular a battery, for the autarkic supply of electrical power to the fire detector as well as a voltage measuring unit for measuring a battery voltage present at the energy storage device. A warning device outputs an acoustic warning if the battery voltage falls below a first voltage threshold. The fire detector also has a sensor sensitive to ambient light and a device for suppressing the output of the acoustic warning if the ambient light falls below a predefinable brightness threshold. The detection unit is an open scattered-light detection unit with a detection space outside the fire detector and the sensor sensitive to ambient light is at the same time an optical receiver of the scattered-light detection unit.
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: June 9, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Michael Clossen-Von Lanken Schulz
  • Patent number: 9030328
    Abstract: An integrated circuit, in particular a microcontroller, for operation in an area with ionizing radiation, has at least one part of a temperature control circuit. The temperature control circuit performs a regulated increase in the circuit temperature to a predefined, essentially constant operating temperature, by increasing the electrical power consumption of the circuit by an adjustable additional electrical power. The circuit has an output facility for information about damage to the integrated circuit caused by the ionizing radiation impacting thereon, it being possible to determine the information about damage from a radiation-dose-dependent decrease in the adjustable additional electrical power.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: May 12, 2015
    Assignee: Siemens Aktiengsellschaft
    Inventor: Hans Aebersold
  • Publication number: 20150123804
    Abstract: Various methods, systems, and devices for identifying a low battery charge of a smoke detector are presented. For example, a device may include a smoke detection sensor that detect smokes and, in response to detecting smoke, generate a smoke detection signal. The device may include battery test circuitry that tests a charge level of a battery installed in the smoke detector device. The device may include an audio output device that outputs a low battery chirp in response to the battery test circuitry determining the charge level of the battery installed in the smoke detector device is low. Also, the device may include a proximity detector that monitors for a wave movement of an object within a distance of the smoke detector device and generates a proximity detection signal when the proximity detector detects the wave movement performed by an object within the distance of the smoke detector device.
    Type: Application
    Filed: January 12, 2015
    Publication date: May 7, 2015
    Applicant: Google Inc.
    Inventor: Wayne T. Holcombe
  • Patent number: 9019109
    Abstract: Methods and apparatus for smoke detection are disclosed. In one embodiment, a smoke detector uses linear discriminant analysis (LDA) to determine whether observed conditions indicate that an alarm is warranted.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: April 28, 2015
    Assignee: UT-Battelle, LLC
    Inventors: Robert J. Bruce Warmack, Dennis A. Wolf, Steven Shane Frank
  • Patent number: 9013317
    Abstract: An optical smoke detector (110) is provided that comprises a housing (112) having a base (114) for attaching the detector to a surface and a cover (116) having a side wall (124) and a bottom wall (126) defining the interior of said cover. An optical sensor (131) is provided for generating a signal representative of the detected light and a control circuit (130) is provided for controlling operation of the detector. The control circuit (130) includes a plurality of temperature sensors (D1, D2) for sensing a rise in ambient temperature and generating a signal representative thereof. The temperature sensors (D1, D2) are located above an internal surface of said bottom wall (126) within the housing and are substantially equally spaced. The control circuit (30) is operable to compare said representative signal with a reference signal and generate an alarm signal in dependence thereon.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: April 21, 2015
    Assignee: Sprue Safety Products Ltd.
    Inventors: Peter Brigham, Stuart Hart
  • Patent number: 9013316
    Abstract: The smoke detector comprises a housing provided with one or more openings for the passage of smoke particles into an interior of the housing. A first electrode and a second electrode are disposed in the interior of the housing and generate an electric field by application of an electrical potential therebetween. A detection chamber is defined between the first electrode and the second electrode, the detection chamber comprising an ionization zone for the generation of charged particles by ionization of air in the vicinity of the second electrode and a drift zone for the movement of charged particles towards the first electrode. A measurement device measures an electrical parameter representative of the electrical current generated between the first electrode and the second electrode by the charged particles.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: April 21, 2015
    Assignees: Finsecur, Institut pour le Developpement de la Science, l'Education et la Technologie (IDSET)
    Inventors: Zohreh Mokhtari, Stéphane Hole, Jacques Lewiner
  • Publication number: 20150102934
    Abstract: In accordance with certain embodiments, a smoke detector determines the presence of smoke particles outside its housing based on measurements of light detected at different wavelengths and corrected based on an ambient light level.
    Type: Application
    Filed: November 4, 2014
    Publication date: April 16, 2015
    Inventor: Matthew Erdtmann
  • Publication number: 20150102935
    Abstract: In accordance with certain embodiments, a smoke detector determines the presence of smoke particles outside its housing based on measurements of light detected at different wavelengths and corrected based on an ambient light level.
    Type: Application
    Filed: November 4, 2014
    Publication date: April 16, 2015
    Inventor: Matthew Erdtmann
  • Patent number: 9007222
    Abstract: According to one embodiment, a hazard detector may include a back plate and a front casing coupled to the back plate to define a housing having an interior region and an opening through which air flows into the interior region. A circuit board may be coupled to the back plate and have a plurality of components mounted thereon. A smoke chamber may be mid-mounted on the circuit board, mid-mounting being characterized in the smoke chamber extending through a hole formed in the circuit board such that a top surface of the smoke chamber is positioned above a top surface of the circuit board and a bottom surface of the smoke chamber is positioned below a bottom surface of the circuit board, whereby an interior region of the smoke chamber is accessible to smoke from both the top and bottom surfaces of the circuit board.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 14, 2015
    Assignee: Google Inc.
    Inventors: Adam Mittleman, Andrew Goldenson, William Dong, John Benjamin Filson, Anthony Michael Fadell, Matthew Lee Rogers, Yoky Matsuoka, Samuel W. Kortz
  • Patent number: 9007223
    Abstract: The invention provides use of one or more emitted beams of radiation (16), for example, laser beam(s), in combination with an image capturing means (14), for example, one or more video cameras and/or optical elements to detect particles (30), for example, smoke particles, located in an open space (12).
    Type: Grant
    Filed: July 8, 2013
    Date of Patent: April 14, 2015
    Assignee: Xtralis Technologies Ltd.
    Inventors: Ron Knox, Karl Boettger, Kemal Ajay
  • Patent number: 8994942
    Abstract: An interference object is identified in a scatter volume of an optical fire detector, which operates according to the scattered light principle. To achieve a higher level of interference protection using a simple structure in a compact fire detector, a common scatter volume is used instead of separate scatter volumes.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: March 31, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Walter Vollenweider
  • Patent number: 8970371
    Abstract: The detection device comprises a sensor, a power supply, an alarm and an acousto-electric transducer. The activated acousto-electric transducer receives an acoustic signal and emits an electrical signal representative of the acoustic signal. The detection device further comprises a means of recognizing a predefined acoustic signal according to the electrical signal emitted by the transducer and triggering an emission of a message by the alarm when the predefined acoustic signal is recognized. The acoustic-electric transducer is only activated at regular intervals. Preferably, the transducer also serves an alarm to emit the message when the predefined acoustic signal is recognized.
    Type: Grant
    Filed: February 17, 2011
    Date of Patent: March 3, 2015
    Assignee: Finsecur
    Inventors: Stéphane Di Marco, Laurent Pichard
  • Patent number: 8970387
    Abstract: An alarm for detecting smoke comprises a housing (1) having vents (9) for allowing ingress of smoke into the housing. A sensor chamber (22,26) is disposed within the housing and has vents (24a,24b) for allowing ingress of smoke into the sensor chamber and comprises two parts. A diode emitter and diode sensor (25) is mounted within the sensor chamber for sensing light reflected off smoke. An alarm circuit (32), including detection means for detecting smoke sensed by the sensor diode (25), is supported on a printed circuit board (PCB) (29). The PCB is sandwiched between two halves (22 and 26) of the sensor chamber such that an edge (30) thereof extends part-way into said sensor chamber. The sensor is mounted on, near or adjacent to the edge.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: March 3, 2015
    Assignee: Sprue Safety Products Ltd.
    Inventors: Peter Brigham, Stuart Hart
  • Patent number: 8952821
    Abstract: In accordance with certain embodiments, a smoke detector utilizes a reflected-light signal and sensed ambient light to determine the presence of smoke particles.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: February 10, 2015
    Assignee: Valor Fire Safety, LLC
    Inventor: Matthew Erdtmann
  • Patent number: 8952822
    Abstract: A smoke alarm comprises smoke detection circuitry for detecting smoke and generating a detection signal responsive thereto. Proximity detection circuitry generates a proximity detection signal responsive to detection of an object within in a selected distance of the smoke alarm. Alarm generation circuitry generates an audible alarm responsive to the detection signal. The audible alarm may be deactivated for a predetermined period of time responsive to at least one proximity detection signal.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: February 10, 2015
    Assignee: Google Inc.
    Inventor: Wayne T. Holcombe
  • Patent number: 8947243
    Abstract: In accordance with certain embodiments, a smoke detector comprises a housing, a light source, one or more light detectors, and an evaluation circuit for determining the presence of smoke particles outside the housing based on light emitted from and reflected back into the housing, as well as light emitted within the housing without emission therefrom.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: February 3, 2015
    Assignee: Valor Fire Safety, LLC
    Inventor: Matthew Erdtmann
  • Patent number: 8947244
    Abstract: In accordance with certain embodiments, a smoke detector utilizes broadband light with a plurality of wavelengths to determine the presence of smoke.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: February 3, 2015
    Assignee: Valor Fire Safety, LLC
    Inventor: Matthew Erdtmann
  • Patent number: 8941505
    Abstract: This smoke detector is provided with: a plurality of light emitting devices which emit light beams of mutually different wavelengths; and a plurality of scattered light receiving sections which receive, at a different scattering angle for each light beam of the respective wavelengths, scattered light generated due to the plurality of light beams emitted simultaneously from these light emitting devices impinging on smoke.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: January 27, 2015
    Assignee: Hochiki Corporation
    Inventor: Manabu Dohi
  • Patent number: 8933811
    Abstract: Smoke alarm comprising at least one internal chamber, which chamber has at least one opening towards the surroundings, such that air may pass through the chamber, and where means are provided for emitting light and means for detecting said light is provided in or around said chamber, where the change in light intensity registered by the means generates a smoke alarm.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: January 13, 2015
    Assignee: Cavius ApS
    Inventor: Glenn Højmose
  • Patent number: 8907801
    Abstract: A smoke detector or, more generally, a danger detector, operates in an area with increased radioactive radiation disposition danger detector has at least one detector unit for detecting at least one danger characteristic, a semiconductor component and other electrical components, at least for outputting an alarm signal. The danger detector also has a temperature control circuit. The temperature control circuit is configured to control the temperature of the at least one semiconductor component. The danger detector may be embodied as a linear smoke detector.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: December 9, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hans Aebersold, Martin Arnold
  • Patent number: 8907802
    Abstract: In accordance with certain embodiments, a smoke detector determines the presence of smoke particles outside its housing based on measurements of light detected at different wavelengths and corrected based on an ambient light level.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: December 9, 2014
    Assignee: Valor Fire Safety, LLC
    Inventor: Matthew Erdtmann
  • Patent number: 8890700
    Abstract: Particles to be detected are irradiated by first wavelength light and second wavelength light. The light that is scattered by the particles is converted into a first and second scattered-light signals. The two scattered-light signals are normalized with respect to one another such that the amplitude profile thereof approximately corresponds to larger particles such as dust and steam. Furthermore, an amplitude ratio is formed between the two scattered-light signals and an amplitude comparison value (90%) is set, which corresponds to a predeterminable particle dimension in the cross-over region between smoke and dust/steam. Mainly the first scattered-light signal is evaluated if the amplitude ratio exceeds the amplitude comparison value (90%) and a dust/steam-density signal is emitted. In the other case, mainly the second scattered-light signal that is evaluated and a smoke-density signal is emitted.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: November 18, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Martin Terence Cole
  • Patent number: 8878683
    Abstract: A light receiver device, which is particularly suited for a smoke detector, has a flat substrate, a light receiver mounted on a front side of the substrate, and a shielding device present on at least a back side of the substrate opposite the front side. The shielding device is configured to at least partially shield against electromagnetic interference radiation impinging on the light receiver through the substrate. False alarms are thereby reduced, while the sensitivity of the light receiver is simultaneously increased. The shielding device is formed with a metal strip inserted through the substrate from the front side to the back side, and bent over a recess on the back side provided therefor, so that the light receiver is protected against interference radiation even on the back side. There is also provided an assembly method for producing a light receiver device.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: November 4, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Urs Riedi
  • Patent number: 8836520
    Abstract: An H2S (hydrogen sulfide) monitor includes a hydrogen sulfide sensor and a moisture sensor. In some examples, the H2S monitor emits a moisture alarm if the moisture sensor detects liquid water in an amount that exceeds or approaches a moisture tolerance limit of the hydrogen sulfide sensor. In some examples, the moisture sensor prevents the hydrogen sulfide sensor from triggering a false H2S alarm caused by moisture contaminating the hydrogen sulfide sensor.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: September 16, 2014
    Inventor: Gary W. Crook
  • Publication number: 20140240136
    Abstract: A smoke alarm comprises smoke detection circuitry for detecting smoke and generating a detection signal responsive thereto. Proximity detection circuitry generates a proximity detection signal responsive to detection of an object within in a selected distance of the smoke alarm. Alarm generation circuitry generates an audible alarm responsive to the detection signal. The audible alarm may be deactivated for a predetermined period of time responsive to at least one proximity detection signal.
    Type: Application
    Filed: May 5, 2014
    Publication date: August 28, 2014
    Applicant: Nest Labs, Inc.
    Inventor: Wayne T. Holcombe
  • Patent number: 8816867
    Abstract: A detector includes a smoke detecting section that includes a light-receiving unit at a position at which the light-receiving unit does not directly receive light emitted by a light-emitting unit in a chamber in which a labyrinth for preventing light from directly entering from the outside and an insect net covering the rim of the labyrinth are provided, the light-receiving unit receiving light scattered by smoke flowing into the chamber. An opening hole is formed open in the surface of the cover receiving hot air current, of the detector. In the cover behind the opening hole, an electrochemical gas sensor is placed to bring gas generated by a fire through the opening hole into contact with an electrolyte solution to detect the gas by an electrode.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: August 26, 2014
    Assignee: HOCHIKI Corporation
    Inventors: Atsuchi Mammoto, Hiromichi Ebata
  • Patent number: 8791826
    Abstract: A method for fire detection in enclosed environments (1) subject to explosion protection regulations out of which an air-dust mixture is filtered while the concentration of dust of the air-dust mixture is lowered to under the explosion limit by a filter (2) and the aspirated air-dust mixture is checked for burning characteristics and if appropriate a fire alarm is triggered, in which the function of the filter (2) is monitored, the fire detection is carried out by use of an aspirating smoke detector system (7) not approved for use in potentially explosive areas but instead is deployed outside the ex-zone and if the filter (2) is destroyed a signal processing unit (15, 15.1) of a malfunction monitoring sensor (14) generates a signal which initiates a subsequent action preventing aspirated air-dust mixture with an elevated concentration of dust from entering the aspirating smoke detector system (7).
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: July 29, 2014
    Assignee: Minimax GmbH & Co. KG
    Inventors: Manfred Russwurm, Torsten Westphal, Thomas Mendle, Olaf Klischat, Bernd Ziems, Hauke Dittmer, Kurt Lenkeit
  • Publication number: 20140197957
    Abstract: A method evaluates two scattered-light signals in a hazard alarm operating in accordance with the scattered light principle. The particles to be detected are irradiated with light in a first wavelength range and with light in a second wavelength range. The light scattered by the particles is converted into a first and second non-normalized scattered light signal. The two scattered light signals are normalized in relation to one another such that their amplitude curve approximately coincides for larger particles such as dust and steam. The two normalized scattered light signals are transformed into a polar angle and a distance as polar coordinates of a polar coordinate system. Finally a respective smoke density signal and a respective dust/steam density signal is formed from a current distance value, wherein for this purpose the respective current distance values, depending on a current polar angle value, are weighted in opposition to one another.
    Type: Application
    Filed: September 25, 2012
    Publication date: July 17, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Martin Fischer