In-Line Connectors (IMAGE) DOE/Sandia National Laboratories Caption If there were a spark, a special polymer, developed by Sandia National Laboratories, within the in-line connectors would melt and a spring would extend inside the connector to facilitate a larger spark gap and stop the flames, as shown in this photo. Credit Photo courtesy of Kenny Armijo, Sandia National Laboratories Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.