Abstract: Trainer embodiments (20, 120, 220) to aid a golfer in practicing a putting stroke are provided. The trainers define a pair of open concave surfaces (40, 42) supported in spaced coplanar relationship to encourage active participation of the golfer's arms and shoulders in the practice by requiring them to maintain the trainer in place. The trainer is configured to be spaced from the golfer's chest when in use. Structure for adjustment of the extent (56) of the spaced relationship and various locking structures therefor are provided.

Abstract: A single channel continuous wave transmitter and receiver to produce a control signal to change the direction of the drive motor of a toy such as a model car having steerable wheels. A single electric motor provides the propulsion for the toy in one direction through the engagement of a planetary gear with a primary drive gear. The planetary gear is mounted on a rotatable ring surrounding the drive gear. When the direction of the motor is changed, the driver gear on the motor which is meshed with the planetary gear causes the planetary gear and ring to rotate until the planetary gear engages a secondary drive gear thereby changing the direction of travel of the vehicle. The rotational movement of the ring is also used as an actuator mechanism. This actuator mechanism is coupled to a cam that is in return coupled to the steering of the vehicle.