Venturedyne, Ltd.

Robert K Hayes

Clinton A Peterson

Richard L Walker

Kevin D Ewing

James M Schulze

John M Eldred

Harry D Boersen

David L Walcott

Kim A Pattee

Vince J Jasinski

A universal access port includes a specific size opening that is formed through a wall of a conditioning enclosure and located at a specific distance from a floor or mounting surface. The opening is preferably rectangular in shape, but other shapes may also be used. When not in use, the universal access port is covered with a sealing panel. Insertable devices may be efficiently inserted and removed from the universal access port. A perimeter of the insertable device is sized to be sealable inserted into the universal access port. Each insertable device preferably seals with an exterior and interior wall of the conditioning enclosure. Some insertable devices include fixturing devices, windows, manual manipulation devices, junction devices, hinged access doors, wire access devices, temperature modifying devices or air circulation devices.

Universal access port

An apparatus for conducting environmental tests on a device and which incorporates an improved transfer mechanism is provided. The apparatus includes a cabinet defining first and second chambers therein. An insulation wall extends between the testing chambers and has an opening therein so as to allow passage between the first and second testing chambers. The transfer mechanism includes a frame structure positioned within the cabinet for supporting a basket which carries the device to be tested. The basket is slidable along the supports of the frame structure for carrying the device between the first and second testing chambers.

Transfer mechanism for environmental testing apparatus

The invention is an improvement in a thermal stress screening system of the type using a single type of liquid for alternately transferring heat to and from the product. In the improvement, the product is confined in a single chamber during alternate heat transfer. That is, the system provides 'one chamber' thermal stress screening. The system includes a plurality of tanks, one each for hot and cold liquid, and a heat exchanger associated with each tank so that the liquid in a tank is maintained at the proper temperature for stress screening. An improved method for thermally stress screening products, e.g., printed circuit boards, includes the steps of placing the product in a chamber, flowing cold liquid into the chamber, draining the cold liquid from the chamber and flowing hot liquid into the same chamber.

System and method for thermally stress screening products

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Fruitport, MI, United States of America

Robert K Hayes