Cyclops Industries

During the late 40's, early 50's several localized plant explosions were experienced by a major chemical facility were directly attributed to the failure of conventional or sandwich type sight glasses. As a result an engineer, Gene LeRoy was given the task of developing a sight glass that when broken, would maintain its integrity and not rupture or blow out, even while under extreme pressure at high temperature. After much trial and error, he hit upon the idea of peripherally sealing the lens assembly instead of vertically clamping and sealing the sight glass against the top and bottom lens gaskets.