It is “Mechanism for converting two-way to one-way rotation 6a” with an added internal gear in order that input and output shafts are in line.
The grey input gear may change rotation direction but the rotation direction of the orange output shaft keeps unchanged.
All external gears are of the same tooth number.
Violet and blue gears are in mesh with yellow one.
Violet gear is in mesh with green one.
Grey internal gear is in mesh with yellow one.
Pink and red springs are of opposite hand directions.
One spring end is fixed to gear.
The transmission tracks:
When the grey input shaft rotates clockwise:
grey gear – yellow gear – blue gear – orange output shaft.
When the grey input shaft rotates anticlockwise:
grey gear – yellow gear – violet gear – green gear - orange output shaft.