US Patent No. 10,342,151

CIRCUIT CARD RACK SYSTEM AND METHOD


Patent No. 10,342,151
Issue Date July 02, 2019
Title Circuit Card Rack System And Method
Inventorship Martin Brokner Christiansen, Laurel, MD (US)
Leonard George Chorosinski, Ellicott City, MD (US)
H. Craig Heffner, Ellicott City, MD (US)
Stanley Katsuyoshi Wakamiya, Ellicott City, MD (US)
Assignee NORTHROP GRUMMAN SYSTEMS CORPORATION, Falls Church, VA (US)

Claim of US Patent No. 10,342,151

1. A circuit card rack system, comprising:a card rack including a laterally oriented clamping slot, the clamping slot being at least partially formed from a temperature-contractible material, the temperature-contractible material being a first temperature-contractible material having a first coefficient of thermal expansion; and
a circuit card having a clamped side region and being at least partially formed from a second temperature-contractible material different from the first temperature-contractible material and having a second coefficient of thermal expansion which is different from the first coefficient of thermal expansion, the circuit card having an operative configuration with at least a portion of the clamped side region being inserted into the clamping slot;
wherein, when the circuit card is in the operative configuration, applying a predetermined temperature differential to the clamping slot reduces a longitudinal dimension of at least a portion of the clamping slot via thermal expansion of the clamping slot, and applying the predetermined temperature differential to the clamped side region reduces the longitudinal dimension of at least a portion of the clamped side region which is located longitudinally within the clamping slot, the thermally-induced reduction of the longitudinal dimension of the clamped side region being less than the thermally-induced reduction of the longitudinal dimension of the claiming slot, thus causing exertion of a compressive force on the portion of the clamped side region which is located longitudinally within the clamping slot via thermal expansion of the clamping slot.