In 1921 inventor Adolf G. Krocker of Waco, Texas, patented a new cutoff saw gauge for wood sawing. A knob moved a cut-off stop via a chain-and-sprocket mechanism. The chain has numbered pointers every 12 inches and there is a 12-inch window with scale in which one of the pointers is visible. If the operator wants to set the stop at 3 feet 6 inches he turns the knob until the "3" pointer is visible in the window, and the knob is further adjusted until that pointer is aimed at the "6" on the scale. This system was claimed to be highly repeatable and could be set to within a few thousandths of an inch.
1926 Ads from A. G. Krocker show that this "Krocker Perfect Gauge" system was manufactured by the inventor. Ads from 1935 show that the Krocker Perfect Gauge was provided with the Tannewitz Model M miter saw. Given the lack of ads in the intervening years, it seems most likely that Tannewitz acquired the rights and manufactured the system themselves.
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