Apparatus and method for adjusting the tractive torque at the driven wheels of a scale model vehicle

Claim 1

In a power train of a vehicle having a differential with an enclosure, including a primary power drive gear with a web, friction driving members encased in said web, friction driven plates, a stored energy device, a first stub axle, a second stub axle having a threaded end, each said axle associated respectively with a first and second driven wheel, the improved apparatus comprising in combination: means for adjusting differential torque, without disassembly of the differential including a) a locking pin for preventing the first driven wheel from rotating when said second driven wheel is rotated, b) guide means for directing said locking pin inside said differential enclosure, without disassembly of one of said differential and said enclosure, c) a locking adjusting nut threaded onto said second stub axle, d) guide means on said locking adjusting nut to receive and guide said locking pin whereby said pin and nut prevent further rotation of said locking nut while permitting said threaded end and said second stub axle to advance or retract in said locking adjusting nut, means including said locking adjusting nut and said stored energy device for transmitting adjusting driving torque to and between said driven plates.