511 results about "SI base unit" patented technology

A low cost, robust, wireless sensor that provides an extended period of operability without maintenance is described. The wireless sensors are configured to communicate with a base unit or repeater. When the sensor unit detects an anomalous ambient condition (e.g., smoke, fire, water, etc.) the sensor communicates with the base unit and provides data regarding the anomalous condition. The sensor unit receives instructions to change operating parameters and / or control external devices.

A low cost, robust, wireless sensor system that provides an extended period of operability without maintenance is described. The system includes one or more intelligent sensor units and a base unit that can communicate with a large number of sensors. When one or more of the sensors detects an anomalous condition (e.g., smoke, fire, water, etc.) the sensor communicates with the base unit and provides data regarding the anomalous condition. The base unit can contact a supervisor or other responsible person by a plurality of techniques, such as, telephone, pager, cellular telephone, Internet, etc. In one embodiment, one or more wireless repeaters are used between the sensors and the base unit to extend the range of the system and to allow the base unit to communicate with a larger number of sensors. In one embodiment, each sensor is labeled according to its intended location, and system configuration data containing the sensor identification codes and corresponding sensor locations is provided to the user.

A communications architecture for a security network using low power and high power wireless communications. The low power and high power wireless communications will typically be operating in different frequency bands and at different transmit power levels. The security network contains base units and transponders. Base units may be in the form of cordless phone handsets or cordless phone base stations. Transmissions from a transponder may be received at more than one base unit. A base unit may forward communications from a transponder to another base unit. Transponder communications may contain identifying information and may further encrypt information sent in the communications. Base units may contain data used in determining whether to route communications to another base unit.

A low cost, robust, wireless sensor system that provides an extended period of operability without maintenance is described. The system includes one or more intelligent sensor units and a base unit that can communicate with a large number of sensors. When one or more of the sensors detects an anomalous condition (e.g., smoke, fire, water, etc.) the sensor communicates with the base unit and provides data regarding the anomalous condition. The base unit can contact a supervisor or other responsible person by a plurality of techniques, such as, telephone, pager, cellular telephone, Internet, etc. In one embodiment, one or more wireless repeaters are used between the sensors and the base unit to extend the range of the system and to allow the base unit to communicate with a larger number of sensors.

An exemplary wireless communication network that includes a base that communicates with remote units located in a cell of the network. A base concatenates information symbols with a preamble corresponding to a destination remote unit. One or more remote units communicating with a base each concatenates information symbols with a preamble corresponding to that remote unit. An adaptive receiver system for a base unit rapidly adapts optimal despreading weights for reproducing information symbols transmitted from multiple remote units. A transmitter system for a base unit concatenates information symbols with a preamble associated with a remote unit in the cell. An adaptive receiver system for a remote unit in a communication network rapidly adapts optimal weights for reproducing a signal transmitted to it by a specific base unit in the network. A transmitter system for a remote unit in a cell of a communication network which concatenates information symbols with preamble associated with the remote unit. A base initiates communication with a desired remote unit by transmitting an initiation codeword in a selected entry slot. One or more remote units each initiates communication with a base by transmitting an initiation codeword associated with the remote unit in a selected entry slot. A remote unit synchronizes in time and frequency to the base using a sequence of synchronization signals transmitted by the base in a number of entry slots.

The present invention is a compound motorized lift device facilitating the uninterrupted and nearly noiseless movement of a low-profile television. The invention is comprised of a base unit, an intermediate unit, and a support unit slidably disposed in a telescoping fashion in the described order. A pair of linearly extensible slides are fastened between base and intermediate units and between intermediate and support units. The intermediate unit is extended and retracted with respect to the base unit in a linear fashion via a motor driven screw. The support unit is extended and retracted in a linear fashion via a cable-pulley arrangement that couples motion by the intermediate unit in a likewise direction to the support unit.

The present invention provides a personal propulsion device including a body unit having a center of gravity, where the body unit includes a thrust assembly providing a main conduit in fluid communication with at least two thrust nozzles, with the thrust nozzles being located above the center of gravity of the body unit. The thrust nozzles are independently pivotable about a transverse axis located above the center of gravity, and may be independently controlled by a single common linkage. The present invention may further include a base unit having an engine and a pump, which provides pressurized fluid to the body unit through a delivery conduit in fluid communication with both the base unit and the thrust assembly.

A Wireless power transmission system comprises a base unit (1) with multiple magnetic field generator circuits and a device (10), separable from said base unit (1) having a receiving inductor, adapted to receive power inductively when said device (10) is in proximity to one of said generator circuits, wherein said base unit (1) comprises a controller (3), configured to determine a transmission circuit (2′) from said generator circuits when said receiving inductor is in proximity to said transmission circuit (2′), whereupon said transmission circuit (2′) is operated to generate a first magnetic field (8), having a first phase, to induce a current in said receiving inductor and at least one of the remaining generator circuits is operated as a compensation circuit (2″, 52, 82) to generate a second magnetic field (21), having an opposite phase to said first phase.

A refillable medical device comprising a base unit (4) adapted to be engaged with a refill unit (2), the device comprising means for counting the number of different refill units which are engaged with the base unit (4). The device may be in the form of a dry powder or pressurised aerosol inhaler, needleless injector, intravenous drip system etc. The device may comprise means to disable the device after a predetermined number of refill units have been used with the base.

A modular appliance system comprising a plurality of modular appliances, a base unit for supporting at least two of the modular appliances simultaneously or a free standing unit for supporting one or more modular appliances simultaneously or a free standing appliance for supporting one or more modular appliances simultaneously. Hingedly attached extensions are movable between points under and around the base, free standing unit and free standing appliance. The extensions provide electric power through cordless connectors and may be pivoted, hingedly attached or on slides.