ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,294, issued on June 23, was assigned to Harmony Fire Ltd. (Yeovil, Great Britain).
"Self-testing fire door" was invented by Jake Melvin (Yeovil, Great Britain) and Warwick Melvin (Yeovil, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "Once a fire door has been installed, the door will typically require regular inspection to ensure that the fire door is still able to operate as intended. An issue typically seen with fire doors is related to the gaps between the door and the frame that being too large. The present disclosure provides a self-testing fire door system comprising a first distance sensor arranged to measure a first distance b...