Abstract: The present technology provides solutions that enable accurate measuring of frequency response on a network (e.g., cable network, fiber optic network) through frequency sweep testing. In various embodiments, the present technology provides a remote transmitter test unit that can be physically deployed at various points in a network. The present technology provides for on demand sweep testing. A remote transmitter test unit or headend test unit can periodically transmit a query message and, based on a response to the query message, can initiate a sweep test. The present technology provides for automatic generation of a sweep profile for a sweep test. Based on an analysis of a frequency spectrum on a network, the sweep profile provides parameters for conducting a sweep test. The present technology provides for Orthogonal Frequency-Division Multiplexing (OFDM) table generation and OFDM sweep testing.

Abstract: A valve for use in filling containers includes a valve flange, nozzle assembly and valve sleeve. The valve flange defines a first through passage. The nozzle assembly includes a liquid fill outlet and air vent outlet below the valve flange. The valve sleeve defines a second through passage and is movable between a lowered valve closed position and a raised valve open position. The valve sleeve including a first portion positioned for sliding movement within the first through passage and a second portion positioned below the valve flange and configured for sealingly closing both the liquid fill outlet and the air vent outlet when the valve sleeve is in the lowered valve closed position. The valve sleeve has a weight sufficient to cause the valve sleeve to move downward from the raised valve open position to the lowered valve closed position.

Abstract: The invention is directed to an insect collection and viewing device comprising a negative air pressure generating assembly including a motor and a fan driven by the motor and a suitably shaped collection nozzle. A viewing chamber is coupled intermediate the collection nozzle and the negative air pressure assembly. The viewing chamber is tubular in shape and has an air permeable-insect impermeable screen at the downstream opening thereof and a movable valve/lens at the upstream opening thereof. When the valve/lens is open an air flow is established through the device. The air flow path is from the nozzle through the viewing chamber into and out of the assembly. In operation insects of interest are captured by sucking the insect into the device through the nozzle, then through the open valve/lens into the viewing chamber where it is captured between the screen and the closed valve. By making the valve in the shape of a transparent lens the trapped insect may be inspected through the magnifying lens.

Abstract: The invention is directed to an insect collection and viewing device comprising a negative air pressure generating assembly including a motor and a fan driven by the motor and a suitably shaped collection nozzle. A viewing chamber is coupled intermediate the collection nozzle and the negative air pressure assembly. The viewing chamber is tubular in shape and has an air permeable-insect impermeable screen at the downstream opening thereof and a movable valve/lens at the upstream opening thereof. When the valve/lens is open an air flow is established through the device. The air flow path is from the nozzle through the viewing chamber into and out of the assembly. In operation insects of interest are captured by sucking the insect into the device through the nozzle, then through the open valve/lens into the viewing chamber where it is captured between the screen and the closed valve. By making the valve in the shape of a transparent lens the trapped insect may be inspected through the magnifying lens.

Abstract: The invention is directed to an insect collection and viewing device comprising a negative air pressure generating assembly including a motor and a fan driven by the motor and a suitably shaped collection nozzle. A viewing chamber is coupled intermediate the collection nozzle and the negative air pressure assembly. The viewing chamber is tubular in shape and has an air permeable-insect impermeable screen at the downstream opening thereof and a movable valve/lens at the upstream opening thereof. When the valve/lens is open an air flow is established through the device. The air flow path is from the nozzle through the viewing chamber into and out of the assembly. In operation insects of interest are captured by sucking the insect into the device through the nozzle, then through the open valve/lens into the viewing chamber where it is captured between the screen and the closed valve. By making the valve in the shape of a transparent lens the trapped insect may be inspected through the magnifying lens.

Abstract: A linear motion reciprocating pump having a cylindrical housing, a magnetically permeable plunger mounted for reciprocal motion in said housing, the plunger including an opening to permit the passage of fluid from one end of the housing through the plunger to the other end of the housing, a power coil mounted on one end of the housing for attracting the plunger toward the one end, a reset coil mounted on the other end of the housing for attracting the plunger toward the other end of the housing, an electrical circuit operatively connected to energize the coils, the circuit including means for alternately controlling the enerization of the coils in phase to reciprocate said plunger in the housing whereby the voltage across the energized coil crosses through zero causing the plunger to be expelled from the energized coil just prior to energization of the other coil.