Automatic lawn mower

摘要: A lawn mower is provided with auto-pilot apparatus which guides the automatically along edge of a swath has been cut within or around an area uncut grass. The includes sensor assembly mounted on front to detect by sensing difference in height between grass and swath. An electrical signal produced when it contacts passes therethrough minute current. current amplified solid-state amplifier circuit pair clutch-brake assemblies are connected for steering response signals from sensors selectively braking and/or driving wheels mower. design disclosed guiding accurately minimum hunting even damp growing sparsely. Various safety features stopping event that strikes obstacle there malfunction guidance mower, means turn off finished mowing. capable being converted readily automatic manual operation vice versa. In addition, method using manner permits avoid obstacles use elevated wire as barriers.