He made special efforts to improve diving flashlights. The existing models were big and clumsy, and he wanted both lighter weight and greater utility. He redesigned the lamp at the front of the flashlight so that light could come out the side of the flashlight, and made a detachable red cover for the central portion of the lamp, to change the flashlight into a distress signal.
他又把大型笨重的潛水手電筒改良得較輕巧，更可依使用者的需要分節裝卸；平面的玻璃燈罩也改為立體，使照射的範圍更廣；並在筒底加上紅色蓋子，拿來套在燈罩上，可發出紅色燈光的求救信號。