On this day in 1931 Chester Gratiot was granted the patent for LAWN MOWER. U.S. Patent No. 1,836,164.
The object of this invention is to provide a lawn mower in which the cutting knives both relatively stationary and rotary are pivotally mounted in hangers, whereby adjustments made be made relative to the length of grass to be cut and the entire cutting assembly will yield to undue obstructions encountered when mowing a lawn.
One thing that sets this mower apart from others patented at this time is the device for driving the cutting reel and for the relative adjustment of the various parts. This allowed the user to adjust the height of the mower in comparison to the height of the grass which led to more effective and efficient mowing practices.
