In about 1923, a new entrant joined the lawn mower market. A disc mower, the MontaMower had a series of nine pairs of disc blades, with nine cutting teeth on each disc. Each pair of discs was on top of the other. As they rotated toward each other, they cut the grass. The pairs of blades were attached in a line across the front of the mower. This was a new concept in cutting grass. To my knowledge, the MontaMower was the only mower of any kind to use it.
The discs, being small, were low to the ground when working, thus cutting the grass short. The discs were arrayed across the entire face of the mower, cutting edge to edge, which meant that as you cut, you also trimmed. The MontaMower was advertised as being “two tools in one,” a mower and a trimmer.
It cut a 16-inch swath, and because it was very low to the ground, just 2-1/2 inches high, it could cut the grass under most bushes. The blades were ground-driven, as the mower was pushed, by wheels designed almost like gears. They were thin, small-diameter and had teeth. As the wheels rotated while traveling, they turned the blades to cut the grass.