A traced and colorized version of the artwork from U.S. Patent 2,105,480 – Safety Belt. An arrow has been added to indicate the operation of the device. This is the type of safety belt used in U.S. military aircraft during World War II.
<a href="//commons.wikimedia.org/wiki/User:Noha307" title="User:Noha307">Noha307</a>
<span class="int-own-work" lang="en">Own work</span> based on <a rel="nofollow" class="external text" href="http://pdfpiw.uspto.gov/.piw?docid=02105480">U.S. patent drawing</a>