ModelPlan 221a
Mike Edkins'
Supplement to Part 1
Demonstration Clock Movement
Modifications
to MP221 Part 1 to achieve
better running, including:
● Replacement of escape wheel inner bearing with 3½" axle journalled in movement framework
● Improved anchor design for use with 28-tooth escape wheel
● Longitudinal limit stops for anchors replaced by simpler arrangement
● Safety guard to protect overhanging section of anchor
● Driving weight increased to 8 lbs
● Travel lock to swing link connecting the crutches
Ref: MP221a 8 pages. Price: £3.60