In 1871 Henry Ashton invented the first successful safety valve for boilers. It was a tremendous help in preventing boiler explosions, a serious problem in the 1800's. For over 100 years, the company produced safety valves for locomotive, marine, and stationary boilers. Attached are a few pictures of the valve and it's history.
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IMG_20180729_161952.jpg (1.21 MiB) Viewed 3898 times
IMG_20190412_170217.jpg (522.43 KiB) Viewed 3898 times
The original safety valve
IMG_20190417_163039.jpg (277.65 KiB) Viewed 3898 times
IMG_20190417_163039.jpg (277.65 KiB) Viewed 3898 times