United Brands Company

Gte Spacenet Corporation

Sudbury Systems Incorporated

Paul R Hughes

John E Campbell

Gerald M Kolodny

A compact electronic housing for a satellite earth station is described. The compact electronic housing comprises a first compartment and a second compartment separated by a panel common to both compartments. The first compartment contains electronic components and is atmospherically isolated from outside air and the second compartment. The electronic components comprise a plurality of groupings. The second compartment provides for movement of outside air into the second compartment through a bottom opening and out a top opening by a chimney effect cooling a plurality of heat exchangers. The panel dividing the two compartments comprises a plurality of conductive heat transferring elements for transferring heat from the electronic components to the plurality of heat exchanger element. The plurality of conductive heat transferring elements are thermally insulated from each other by an insulating material; thereby, maintaining a temperature differential between the groups of electronic components even though there is a close physical proximity between the groups. The electronic components are connected to one side of the conductive heat transferring elements and the heat exchanger elements are connected to the other side of the conductive heat transferring elements. The electronic components having the greatest heat generating capacity and/or highest allowable operating temperature are physically separated and/or located above the other electronic components.

Electronic housing for a satellite earth station

A thermostat monitoring and controlling the temperature of produce ripening within an enclosure and featuring a bridge circuit sensing errors between the actual and desired temperatures in which the desired temperature is selected directly in units of degrees. A bridge amplifier having feedback maintains the bridge in electrical balance to avoid errors due to changes in bridge component self heating. An error detection circuit having a single control simultaneously selects upper and lower error limits centered on the desired temperature, in units of degrees. The circuit indicates whenever the actual temperature goes outside these limits. An alarm circuit indicates a temperature error or a power failure in the thermostat at the thermostat and at a remote location. This circuit utilizes an alternating current source which activates current direction-dependent indicators operating on alternate half cycles. Electrical isolation of the temperature monitoring circuitry from the circuitry controlling heating, cooling and fan equipments is provided by coupling a signal indicating a temperature error through a single electrically isolating interface to equipment selection and control circuitry at line potential.

Thermostat

Rapid simultaneous multiple access information storage and retrieval system including multiple simultaneously available audio dictation inputs and multiple simultaneously available audio outputs, an array of magnetic recording and playback instruments, and a controller operating under computer command for multiplexing the interchange of audio signals between inputs and outputs on the one hand and the magnetic recorder storage means on the other and at the same time for generating control signals to and from the input and output terminals.

Rapid simultaneous multiple access information storage and retrieval

A thermostat monitoring and controlling the temperature of produce ripening within an enclosure and featuring a bridge circuit sensing errors between the actual and desired temperatures in which the desired temperature is selected directly in units of degrees. A bridge amplifier having feedback maintains the bridge in electrical balance to avoid errors due to changes in bridge component self heating. An error detection circuit having a single control simultaneously selects upper and lower error limits centered on the desired temperature, in units of degrees. The circuit indicates whenever the actual temperature goes outside these limits. An alarm circuit indicates a temperature error or a power failure in the thermostat at the thermostat and at a remote location. This circuit utilizes an alternating current source which activates current direction-dependent indicators operating on alternate half cycles. Electrical isolation of the temperature monitoring circuitry from the circuitry controlling heating, cooling and fan equipments is provided by coupling a signal indicating a temperature error through a single electrically isolating interface to eqiupment selection and control circuitry at line potential.

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Sudbury, MA, United States of America

Paul R Hughes