[1] Earlier in his career, he was draftsman, construction engineer, and manager for various railroad manufacturers.
[2] He continued to improve the device and in 1890 invented the glass disc sprinkler, essentially the same as that in use today.
[2] He secured some 40 distinct patents for improvements on his sprinklers, and invented a dry pipe valve and the automatic fire-alarm system as well.
ITT Grinnell supporting products are still sold today by Anvil International in the US and PSS in Germany.
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