This patent specification relates to a wall switch that comprises a docking station and a user-removable wall-switch head unit. In some embodiments, the docking station is configured to receive the user-removable wall-switch head unit, and configured to be permanently connected to a wall and coupled to high-power voltage wires. In some embodiments, the user-removable wall-switch head unit is configured to be user-insertable into said docking station and user-removable therefrom such that the user is not exposed to high-voltage connections when inserting or removing. In some embodiments, the wall switch controller further comprises inputs and outputs and circuitry for switchably controlling household line current power to a household electrical fixture. In some embodiments, the wall switch controller further comprises an occupancy sensor, a temperature sensor, or a processor.

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.

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.

An intelligent household controller includes a communication unit, a central controller, an alarm unit, and a button. The communication unit is configured to receive information collected by at least one sensor, and can forward control commands to the at least one sensor. The central controller is electrically connected to the communication unit for receiving and processing information received by the communication unit and can output processed information and control commands to the communication unit and to a terminal device in user possession. The alarm unit is electrically connected to the central controller and can output audible alarm. The button is electrically connected to the central controller for switching between modes of operation according to user's desire.

An intelligent household controller includes a communication unit, a central controller, an alarm unit, and a button. The communication unit is configured to receive information collected by at least one sensor, and can forward control commands to the at least one sensor. The central controller is electrically connected to the communication unit for receiving and processing information received by the communication unit and can output processed information and control commands to the communication unit and to a terminal device in user possession. The alarm unit is electrically connected to the central controller and can output audible alarm. The button is electrically connected to the central controller for switching between modes of operation according to user's desire.

An intelligent household controller includes a communication unit, a central controller, an alarm unit, and a button. The communication unit is configured to receive information collected by at least one sensor, and can forward control commands to the at least one sensor. The central controller is electrically connected to the communication unit for receiving and processing information received by the communication unit and can output processed information and control commands to the communication unit and to a terminal device in user possession. The alarm unit is electrically connected to the central controller and can output audible alarm. The button is electrically connected to the central controller for switching between modes of operation according to user's desire.

An intelligent household controller includes a communication unit, a central controller, an alarm unit, and a button. The communication unit is configured to receive information collected by at least one sensor, and can forward control commands to the at least one sensor. The central controller is electrically connected to the communication unit for receiving and processing information received by the communication unit and can output processed information and control commands to the communication unit and to a terminal device in user possession. The alarm unit is electrically connected to the central controller and can output audible alarm. The button is electrically connected to the central controller for switching between modes of operation according to user's desire.

This application is directed to a home monitoring and control system including a doorbell installed at a door of a home. The doorbell has a button configured to, upon being pressed, wirelessly initiate a first communication to indicate presence of a person at the door. The doorbell also has a camera configured to capture video data within a field of view, and a processor configured to cause a communication component to enable the first communication and wirelessly stream via a remote server the video data captured by the camera to a monitoring device associated with an occupant of the home.

This application is directed to a home monitoring and control system including a doorbell installed at a door of a home. The doorbell has a button configured to, upon being pressed, wirelessly initiate a first communication to indicate presence of a person at the door. The doorbell also has a camera configured to capture video data within a field of view, and a processor configured to cause a communication component to enable the first communication and wirelessly stream via a remote server the video data captured by the camera to a monitoring device associated with an occupant of the home.

An ionized gas detector includes at least a pair of ion detecting electrodes that detect ions of the ionized measuring-subject gas, an electrode-voltage applying unit that applies a given voltage to the ion detecting electrodes, the electrode-voltage applying unit being configured to be capable of reversing its voltage polarity, a charge amplifier circuit having a charge capacitor that accumulates electric charges generated by voltage application by the electrode-voltage applying unit, an ion current calculating unit that calculates the value of an ion current of ions of the measuring-subject gas, based on a time-dependent change of the volume of electric charges accumulated in the charge capacitor of the charge amplifier circuit, and a concentration determining unit that determines the concentration of the measuring-subject gas, based on an ion current value calculated by the ion current calculating unit.