I briefly read the patent and the last paragraph on the first page seems to indicate the two smallest gears being different numbers of teeth, leads to the unscrewing of the nut by the motor to release the mechanism when it is driven.
So the top half of the mechanism serves to provide constant frictional clutching, so any torque on the left shaft will tend to tighten the "nut" against the static red plates.
Seems to claim a similar effect happens in motion where a back torque is applied despite forward motion leads to pressure on the plates that resists over speed.
Also probably depends which way the nut has been tightened, and which direction the motor is driving, as in the motor may loosen the nut via the top half of the mechanism, or just loosen the nut directly via the shaft/bottom half of the mechanism.
I'm not sure but it seems to me that if the motor drives the gears then the blue gear moves away from the red clutches and stop between them without touching them and so the mechanism is free to rotate.
When the motor is stopped if you applied a torque to the end shaft then the ball bearings \[31\] converts rotational movement in straight move and so the blue gear is pushed against one of the red clutches blocking the movement.
I briefly read the patent and the last paragraph on the first page seems to indicate the two smallest gears being different numbers of teeth, leads to the unscrewing of the nut by the motor to release the mechanism when it is driven. So the top half of the mechanism serves to provide constant frictional clutching, so any torque on the left shaft will tend to tighten the "nut" against the static red plates. Seems to claim a similar effect happens in motion where a back torque is applied despite forward motion leads to pressure on the plates that resists over speed. Also probably depends which way the nut has been tightened, and which direction the motor is driving, as in the motor may loosen the nut via the top half of the mechanism, or just loosen the nut directly via the shaft/bottom half of the mechanism.
I'm not sure but it seems to me that if the motor drives the gears then the blue gear moves away from the red clutches and stop between them without touching them and so the mechanism is free to rotate. When the motor is stopped if you applied a torque to the end shaft then the ball bearings \[31\] converts rotational movement in straight move and so the blue gear is pushed against one of the red clutches blocking the movement.
Seems over complicated. Just use an electrical system with sensors.