Lockheed Martin Corporation

Lockhead Martin Corp.

Daniel G Rice

Eugene J Urda

John Thaddeus Beckert

William S Terry

Magid Fazel

Daniel M Hutchinson

Jose R Caceres

A portable detection system () for hazardous materials including explosives and infectious or hazardous biological agents readily adapted to conventional mail collection boxes (), rural mailboxes () and the like. The system includes a fan () and a sensor (). The fan () provides sufficient airflow to circulate the air within a mailbox such that the internal air after coming in contact with the contents is directed the sensor for analysis. The air quality can be determined visually (), audibly (), or electronically (). Consequently once such detection is made and the air is verified as being safe, the contents can be removed safely. If it is determined that the air contains some type of hazardous material, further steps can be taken to specifically locate the source of such hazardous material. An alternative embodiment includes a filter () to improve fan efficiency.

Hazardous material detection system for use with mail and other objects

A dual-board host or main printed wiring structure of a circuit module with increased component mounting area is made plug-compatible with a backplane to which single-board host or main boards may be attached with connectors of differing dimensions and pin configurations, the center line of which are offset from each other. The connection sides of the two boards are respectively bonded to a heat sink frame structure having a thickness which corresponds to the connector offset on the backplane such that the total thickness of one of the printed wiring boards, the heat sink frame and the two bonding layers with respect to board to center line distances equals the connector offset on a given backplane. Direct connections to both boards of the dual-board structure can thus be made from the backplane to reduce connection length and reliability relating to a mezzanine board mounted on a single-board host. The preferably continuous heat sink frame distributes heat through the structure and to a card cage to avoid hot spots on the printed wiring boards. A mezzanine board and further heat sink may be attached to the dual board host to further increase component mounting area to far greater levels than common industry standards while improving mechanical and electrical integrity and reliability.

VME eurocard triple printed wiring board single slot module assembly

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Owego, NY, United States of America

Daniel G Rice