Abstract: Methods, systems, and apparatuses for managing sensor information are disclosed. An example apparatus can comprise a power unit configured to collect energy, a sensor unit configured to receive sensor data from a sensor, a memory unit configured to store the sensor data, a communication unit configured to wirelessly broadcast the sensor data to one or more sensor nodes in a network of sensor nodes, and a processing unit. The processing unit can be configured to operate at least one of the sensor unit, the memory unit, and the communication unit after the energy collected in the power unit reaches a threshold value.

Abstract: Mouth guards having electrodes, sensors, and/or accelerometers for determining one or more physiological conditions of a subject. Processing circuitry receives the outputs of the electrodes, sensors, and/or accelerometers. Optionally, at least a portion of the processing circuitry can be positioned within a helmet that is worn by a subject. The mouth guard can optionally be tethered to the helmet.

Abstract: Methods, systems, and apparatuses for managing sensor information are disclosed. An example apparatus can comprise a power unit configured to collect energy, a sensor unit configured to receive sensor data from a sensor, a memory unit configured to store the sensor data, a communication unit configured to wirelessly broadcast the sensor data to one or more sensor nodes in a network of sensor nodes, and a processing unit. The processing unit can be configured to operate at least one of the sensor unit, the memory unit, and the communication unit after the energy collected in the power unit reaches a threshold value.

Abstract: A multimeter having measurement terminals and configured to receive measurement signals applied to the measurement terminals and a measurement value and also configured to receive communication signals applied to the measurement terminals and extract encoded information from the communication signals. The multimeter can be included in a multimeter communication system having a device coupled to the measurement terminals of the multimeter. The device is configured to generate communication signals having encoded information and provide the communication signals to the measurement terminals of the multimeter.

Abstract: A multimeter having measurement terminals and configured to receive measurement signals applied to the measurement terminals and a measurement value and also configured to receive communication signals applied to the measurement terminals and extract encoded information from the communication signals. The multimeter can be included in a multimeter communication system having a device coupled to the measurement terminals of the multimeter. The device is configured to generate communication signals having encoded information and provide the communication signals to the measurement terminals of the multimeter.

Abstract: A multimeter having measurement terminals and configured to receive measurement signals applied to the measurement terminals and a measurement value and also configured to receive communication signals applied to the measurement terminals and extract encoded information from the communication signals. The multimeter can be included in a multimeter communication system having a device coupled to the measurement terminals of the multimeter. The device is configured to generate communication signals having encoded information and provide the communication signals to the measurement terminals of the multimeter.

Abstract: A multimeter having measurement terminals and configured to receive measurement signals applied to the measurement terminals and a measurement value and also configured to receive communication signals applied to the measurement terminals and extract encoded information from the communication signals. The multimeter can be included in a multimeter communication system having a device coupled to the measurement terminals of the multimeter. The device is configured to generate communication signals having encoded information and provide the communication signals to the measurement terminals of the multimeter.

Abstract: A device for generating hydrogen gas is provided. The device (101) comprises a first hydrogen-containing composition (107) that reacts with a second composition to evolve hydrogen gas; a dispenser (105) adapted to apply the first composition to a first porous member (109); and a conduit (111) adapted to supply the second composition to the first porous member. In a preferred embodiment, the first composition is selected from the group consisting of hydrides, borohydrides and boranes, the second composition is water, and the dispenser is spring-loaded and is charged with the first composition. As the first composition reacts with water at the interface to evolve hydrogen gas, the dispenser forces the reaction product across the interface and out of the dispenser, where it will not interfere with the progress of the hydrogen evolution reaction.

Abstract: A machine for packaging multiple containers wherein a flexible carrier stock is fed across a jaw drum. A plurality of containers are also moved through the machine whereby the carrier is subsequently positioned over the plurality of containers so that flexible carrier stock engages with one of the containers to form a package. The machine is adjustable to accommodate a range of container heights and sizes, carrier configurations and/or package sizes. In addition, movement of the various components of the machine is coordinated using an encoder.

Abstract: An aerial reconnaissance system generates imagery of a scene that meets resolution or field of view objectives automatically and autonomously. In one embodiment, a passive method of automatically calculating range to the target from a sequence of airborne reconnaissance camera images is used. Range information is use for controlling the adjustment of a zoom lens to yield frame-to-frame target imagery that has a desired, e.g., constant, ground resolution or field of view at the center of the image despite rapid and significant aircraft altitude and attitude changes. Image to image digital correlation is used to determine the displacement of the target at the focal plane. Camera frame rate and aircraft INS/GPS information is used to accurately determine the frame to frame distance (baseline). The calculated range to target is then used to drive a zoom lens servo mechanism to the proper focal length to yield the desired resolution or field of view for the next image.

Abstract: An electro-optical area array reconnaissance detector is disclosed which accomplishes forward motion compensation electronically and without moving parts. The array is made of photo-sensitive cells arranged in rows and columns, the columns being organized into one or more column groups. Charge packets collected in the cells representing scene information are transferred down the columns at the same rate as the image motion in the plane of the array. In a side oblique reconnaissance scenario, the columns may be organized into 16 column groups, each column group having its own charge transfer rate corresponding to the image motion rate in that column group.

Abstract: A planing hull of a water craft including side keels and a center keep. A downwardly open chamber is defined rearwardly of the center keel and is flanked on either side by the side keels. The chamber confines a cushion of air which supports the hull in the planing mode, air supply to the chamber being wholly via the underside of the hull by being channelled between the keels without the use of air vents which open into the chamber. The absence of air vents provides improved drag at medium and low speeds.

Abstract: A two channel audio scrambling circuit for a television signal encoding system includes synchronized digital carrier switching means for deriving two suppressed carrier, switched audio signals that are 90 degrees apart, and combining them into a single output signal. A digital phase shifter, supplied with a carrier related to the horizontal line frequency develops properly phased outputs for controlling electronic switches to produce two phase displaced digital carrier switching signals. A plurality of scrambling modes are determined by logic means under control of a vertical interval signal, a video inversion signal and a tone signal input for controlling the digital phase shifter to change the carrier frequency. Complementary decoding circuitry for recovering the so-encoded audio signals is also described.

Abstract: A multi-mode audio scrambling system includes an all-pass filter and a 90 degree phase shift circuit for supplying balanced modulators with 90 degree phase displaced audio information and 90 degree phase displaced carriers derived from the horizontal line frequency of a television receiver for producing a single sideband, suppressed carrier audio spectrum. A plurality of offset frequencies are derived from the horizontal line frequency and are used to further modulate the resultant signal to produce a single sideband displaced audio spectrum. A logic circuit selects the offset frequency (mode) in response to vertical interval signals, video inversion signals and audio tone or data signals. The final output is thus scrambled in different modes with different offset frequencies. A complementary unscrambling system is also described.

Abstract: A cable converter produces a 4.5 MHz intercarrier sound signal from a received television signal for application to one input of a phase lock loop circuit, the other input of which is supplied from a voltage controlled oscillator producing a regenerated 4.5 MHz intercarrier signal. The output of the phase lock loop is supplied through a loop filter to the input of the voltage controlled oscillator to control its frequency. The regenerated 4.5 MHz intercarrier signal is thus stabilized by the received 4.5 MHz intercarrier signal.

Abstract: A means for coding and decoding video signals by the application of one of a plurality of available scrambling signals includes means for comparing the brightness level during a predetermined time period of the video signal with the brightness level of the video signal over the succeeding predetermined time period. There are means for changing from one scrambling signal to another if the difference between brightness levels in successive predetermined time periods exceeds a given value.

Abstract: A converter/decoder for use in subscription television includes means for converting any input TV channel to a predetermined output channel. Decoding means are connected to the converter at its output for decoding the selected output channel. The decoder is enabled in response to data carried on the TV signal which describes the program level of the particular selected channel. The means for enabling the decoder includes a comparison circuit which compares the television signal program level data with authorization data and performs an enabling function when there is correspondence between the two data entries. The authorization data may be received by the converter/decoder simultaneously with the program level data, but at a frequency other than that of the television signal, for example, at a frequency in the FM band.

Abstract: A holder for a plurality of dry cells comprises a tray having a pair of open-top compartments, each receiving a plurality of batteries arranged in series and biased into engagement with one another by a contact spring. A retainer projects over each compartment from a common side wall of the compartments and prevents certain batteries from being removed from their normal positions through the open tops of the compartments, while permitting such removal of other batteries. Sufficient lateral clearance is provided to permit the batteries to move somewhat in response to mechanical shock forces without breaking a desired electrical contact.