Patent for a washer-scrubber that cleans gas from "tarry matter, ammonia, sulphureted hydrogen, carbonic acid and other impurities" (lines 14-16). The machine divides gas into streams, sprays it with washing liquor, spreads it over reticulated and perforated plates.
Patent for a new and improved elevator that has “a locking device for securing the jaws of the elevator around the pipe to be lifted” (lines 11-13), including illustrations.
Patent for new retaining rings in rotary-drill cutters, which allow the cutters to be inserted into and removed quickly from a drill, and can be "manufactured cheaply" (line 28).
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