Abstract: A baffle for use in an attic is installed between adjacent roof rafters to substantially block the flow of ventilating air through an opening located between the top surface of the wall plate and the underside of the roof deck. The baffle is formed from extruded cellular plastics material which is cut to define two parallel grooves by cutting through the first wall to define first and second side flaps hingedly connected to the rectangular panel by bending said sheet at said grooves for attaching the side flaps to the inner face of said roof rafters. The first and second grooves are formed in the sheet at right angles to the webs so that the grooves cut through the first sheet also cut at least partly through the webs.

Abstract: A communication system for providing downlink and uplink communication between Service Providers, and users located in RF remotely located isolated areas, includes the sequential series connection of Service Provider signal sectors to Radio Interface Modules (RIM's), Service Combiner Units (SCU's), Fiber Transceiver Units (FTU's), Optical Multiplexer Units (OMU's), and Remote Fiber Nodes (RFN's), with only the RFN's being located in the RF isolated areas.

Abstract: A communication system for providing downlink and uplink communication between Service Providers, and users located in RF remotely located isolated areas, includes the sequential series connection of Service Provider signal sectors to Radio Interface Modules (RIM's), Service Combiner Units (SCU's), Fiber Transceiver Units (FTU's), Optical Multiplexer Units (OMU's), and Remote Fiber Nodes (RFN's), with only the RFN's being located in the RF isolated areas. The RIM's provide level control of RF signals bidirectional flowing between the Service Providers and SCU's. The SCU's both multiplex and split received downlink RF signals for inputting to the FTU's, and also combine and split RF uplink signals received from the FTU's for feed to the RIM's. The FTU's convert downlink RF signals into optical signals, and split the optical signals for connection to the OMU's. The FTU's also convert uplink optical signals received from the OMU's into uplink RF signals for connection to the SCU's.

Abstract: A computer servicing cart containing one or more battery servicing compartments or modules for charging and storing batteries for electronic devices, such as computers, cellular phones, and PDAs. One or more computer servicing compartments or modules for charging and storing electronic devices, such as computers, cellular phones, and PDAs. One or more internal power supplies selectively connectable to at external electrical outlet. A power shedding control circuit to prevent the cart from overloading an external outlet.

Abstract: An improved system and method for floating an object is disclosed by the present invention. The system includes an electromagnetic source for accommodating a wide weight-range of objects to be floated and for providing intelligent, responsive control of the system. The electromagnetic source includes a single Hall effect sensor for sensing the position change of the floating object and a microprocessor for intelligently controlling the floating object so that a better, simpler, and more stable operation is achieved. With the implementation of the microprocessor, a user friendly interface for initially placing the object on the system is achieved, and no complicate adjustments of the system are required to float a new object.

Abstract: A unit that can be a tiny module within a battery pack includes a microprocessor operating through onboard sensors and read circuitry to monitor battery current, voltage and temperature and to develop fast charge termination control data. Various termination schemes are available including negative delta V, dT/dt, dV/dt, absolute temperature, absolute voltage, and override timer. The microprocessor also operates to develop state of charge, percentage of capacity charge and other status data, to store such data along with setup and calibration data, in an EEPROM, to report data to a host periodically or when polled to and to operate automatically or at a user's request to initially perform and update a calibration as to actual battery capacity. During times when the pack is idle, the unit automatically reverts to a low-power mode in which measuring circuitry is deenergized but during such times, it operates periodically to compensate for self-discharge as a function of temperature.

Abstract: This invention relates to the use of rechargeable batteries for supply of electrical power. Devices are provided which are highly efficient and which provide accurate and reliable control and indications, while using a small number of component parts and being otherwise readily and economically manufacturable. Devices of the invention are compact and such that they can be readily included, if desired, as integral parts of battery packs such as those used for supplying power to lap-computers and other types of portable equipment.

Abstract: A battery charger has battery terminals connected to a conventional wall outlet through a switching power supply to provide a direct conductive non-isolated path from the supply for direct transformer-less supply of charging current to a battery. Pulse width modulated signals are applied to a MOSFET of the power supply from an output port of a microprocessor which is operates a ramp generator and responds to a comparator circuit coupled to a battery voltage sense circuit and the ramp generator. The microprocessor is programmed to accurately control generation of the pulse width modulated signals, to shut off current when a true voltage peak is reached at a full charge condition, to avoid response to false peaks, to cut off current for short time intervals during voltage measurements, to perform an exponential averaging function and to shut down at excessive battery temperatures or time rates of change of battery temperature.

Abstract: Images of underwater features, animate and inanimate, are produced from substantial distances in any direction around a boat, using small and easily mountable sonar devices, including three sonar transducers, two being stationary and the third being directable, the transducers being operable at various ultrasonic frequencies. Under keyboard control and using completely integrated electronic circuitry, images and echo sounding reports are generated on a graphic video display. The images include a sector-shaped image from a sector scan which covers a selected range of azimuth angles at a selected down angle.

Abstract: A battering charging system is controlled by a microprocessor to charge and discharge batteries while periodically effecting monitoring and control operations in which battery current data are registered to accumulate capacity data in a memory and to thereafter display such data which includes both charge and discharge capacity data. The system has different modes of operation which may be selected by a user, including a charge mode, a discharge mode and an autocycle mode. In the autocycle mode, efficiency rate data is computed and displayed.

Abstract: A battery charger system is provided in which a microprocessor is used to discontinue application of a high charge current when the battery voltage drops below a peak value by a value greater than a threshold value corresponding to stored digital data. The microprocessor is also used to obtain a discharge mode of operation and an autocycle mode of operation in which a charge operation is performed after a discharge operation, the microprocessor being responsive to actuation of keys of a keyboard. In performing various operations, the microprocessor is used in performing analog-to-digital conversions and it is additionally used in computing energy capacity and efficiency.