Wilmington Research and Development Corporation

Itt Manufacturing Enterprises, Inc.

Stephen B Boyd

Douglas A Johnson

Kenneth J LeBlanc

Thomas Parent

Joseph M Gordon

A technique for cooling equipment racks that contain multiple individual devices, such as computers, that each have their own internal cooling fans. An air passage ('shunt tube') is placed between a compartment inside the rack, and the ambient air outside the rack, or between compartments inside the rack. Sensors inside the air passage detect movement of the air inside the passage, and thus indirectly measure the presence of a differential pressure. The preferred sensor embodiment uses temperature sensors, and takes advantage of the differences of the air temperatures inside the computer rack, and outside the computer rack (or between internal computer rack compartments) to determine if the air is moving through the air passage, and which direction the air is moving. In response to the measurements, a control system is configured to drive the plenum to a slight vacuum, and then slowly reduce an exhaust fan until the plenum is slightly pressurized, at which point the fan speeds up and again creates a slight vacuum. This allows the rack enclosure to continuously adapt to any changes in cooling requirements, as the computer utilization changes.

Adaptive cooling method for computer rack enclosure

The present invention provides a new and unique searchlight featuring a bayonet/security locking and mounting system, or a controller having a center home position, or a controller having a 2-speed joystick, or some combination of one or more of these features.

Searchlight featuring bayonet mounting system with 2-speed joystick rotational operation

An induction heating system having an induction source, a heating element heated from the induction source and a circuit energized by the induction source. The circuit can be a controller which includes a temperature sensor for measuring a temperature of the heating element, and a feedback loop formed between the temperature sensor and the induction source. The heating element can be mounted within a housing to form an induction heated container for holding items to be heated. Such a container can be used in commercial food warming and holding.

Induction driven power supply for circuits accompanying portable heated items

An induction heating system having an induction source, a heating element heated from the induction source, a power supply energized by the induction source and a circuit powered by the power supply. The circuit can be a controller which includes a temperature sensor for measuring a temperature of the heating element, and a feedback loop formed between the temperature sensor and the induction source. The heating element can be mounted within a housing to form an induction heated container for holding items to be heated. Such a container can be used in commercial food warming and holding.

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Merrimac, MA, United States of America

Stephen B Boyd