| 摘要 |
<p>A circuit is directed to a disconnect and overload bypass (16) arrangemant for a hand-held portable tool equipped with an electric motor (3) supplied from a source (13) of electrical energy and a manually operable on-off switch (14) for switching the tool on and off. The arrangement includes a self-reclosing disconnect switch (15) operatively connected to the motor (3) to temporarily disconnect the same from the energy source (13) in response to an overload condition; and, circuit control means for supplying energy to the motor (3) at a reduced level when the disconnect switch (15) is open whereby the motor (3) will continue to operate at reduced torgue pending self-reclosure of the disconnect switch (15) and thereby provide the operator of the tool with an audible and visual indication that the motor has not been deactivated by manually actuating the on-off switch (14).</p> |
