| 摘要 |
The device is applicable to a lawn mower of the rotary type having a rotor on a vertical axis, with cutting blades movable to an outer active position in which they extend radially beyond the rotor, and an inner inactive position in which they are retracted within the rotor; a solenoid is utilized to project the cutting blades to active position, and they are spring-loaded to retract them in inactive position; the solenoid is activated by a switch controlled by the usual manual traction control lever, utilized for throwing the motor into drive condition, so that the cutting blades are moved to active position automatically when the mower is put in drive condition and to inactive position when the mower is stopped; the solenoid is actuated by the magneto of the engine provided in the mower.
|
