Mcdonnell Douglas Corporation

Walter Thomas Baugh

Francis Christopher Wessling, Iii

Stephen Mark Kusek

Desmond Morris

A multilayer circuit board and an associated heating apparatus is provided for heating electrical components. The multilayer circuit board includes a trace layer having at least one electrical trace terminating with a contact pad that is positioned to electrically contact a respective lead of an electrical component mounted upon the multilayer circuit board. The multilayer circuit board also includes a heating layer disposed in thermal contact with the electrical component mounted upon the multilayer circuit board. The heating layer includes a first electrically resistive heating element disposed upon an insulating substrate in general alignment with the electrical component mounted upon the multilayer circuit board. The electrically resistive heating element provides heat to maintain the operating temperature of the electrical component within a desired range. By increasing the operating temperature of the electrical component, the multilayer circuit board allows less expensive, commercial grade electronics to be utilized which would otherwise have been susceptible to failure at lower temperatures.

Multilayer circuit board with electrically resistive heating element

An apparatus for transmitting and receiving spoken utterances over a local area network (LAN) in near-real-time. The type of LANs include both wireless LANs (e.g., radio frequency LANs) and wired LANs (e.g., a Novell network). A User depresses computer mouse buttons to initiate or terminate speaking into a computer which contains a sound card, microphone and speakers. The computer mouse buttons generate messages which are monitored by a hibernating process. Upon receiving the appropriate messages, the hibernating process awakens to transmit to one or more selected users. With only a slight time delay, one or more selected remote users receive the recorded message. Two buffers provide an efficient transfer mechanism of the recorded message between the transmitting and the receiving computers. Also, encryption techniques provide security measures for the transmitted recorded measures and compression techniques assist in the transfer of the recorded message.

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Knoxville, TN, United States of America

Walter Thomas Baugh