Abstract: A thermal proxy device for monitoring change in condition. The change in condition can be a change in temperature such as a change above or below a predetermined temperature or a freezing condition. An indicator used in the thermal proxy device can have the same physical-chemical properties as the product to be monitored. The indicator can have a similar thermal mass with similar specific gravity and/or specific heat of the material to be monitored. The indicator can be associated with a container of the material to be monitored.

Abstract: A thermal proxy device for monitoring change in condition. The change in condition can be a change in temperature such as a change above or below a predetermined temperature or a freezing condition. An indicator used in the thermal proxy device can have the same physical-chemical properties as the product to be monitored. The indicator can have a similar thermal mass with similar specific gravity and/or specific heat of the material to be monitored. The indicator can be associated with a container of the material to be monitored.

Abstract: An assembly for a seed treating device incorporating a high volume, downwardly tapered hopper with metering gates and a series of high pressure chemical nozzles which laterally introduce a measured chemical treatment to the flow of falling grain or seed inside a spray chamber. A series of valves control the flow of chemicals through the apparatus while sump pump gathers and recirculates excess chemicals from inside the spray chamber for reuse or disposal. The spray chamber exit can be closed with a water tight seal and the system flushed with water and filtered for purposes of cleansing.

Abstract: A secure cable television distribution system is disclosed for controlling subscriber access to preferred channel information in accordance with the teachings of the instant invention. Premium channel information to be selectively provided to a subscriber is tapped from the transmission medium, modulated, inverted and separated into discrete channel signals. The discrete channel signals are then selectively reintroduced to the transmission medium to effect cancellation of premium channel information which is not to be provided to a predetermined subscriber.

Abstract: A transmission line filter having two conductors with insulation therebetween. A third conductor of a length related to the wavelength of the signal being filtered is spaced from one of the conductors but electrically coupled thereto. Terminal connectors are located at each end of the filter to interconnect the filter into the regular transmission line of the system in which the filter is being used. The filter can be formed of coaxial cable and can be a single frequency filter a multiple frequency filter of a bandpass filter arrangement. In a filter trap arrangement, one end of the third conductor is conductively connected to the other of the main conductors.