1. In turn, the frames were attached to the firewall by universal joints . 2. Propeller shaft universal joints were now metal in place of their fabric predecessors. 3. Outboard of the powerplants, the wings are attached by universal joints . 4. Constant-velocity universal joints are normally used to transfer power smoothly between the components. 5. Constant velocity universal joint transmitted the power to the front wheels. 6. Lindberg's compass used an anemometer to spin the armature through a universal joint . 7. The reversing and hand brake gear were provided with universal joints . 8. In 1841, the English scientist Robert Willis analyzed the motion of the universal joint . 9. Suddenly the pink lights of " The Universal Joint , " a bar, come on. 10. Hitches for two-wheel trailers must incorporate some form of universal joint or flexible coupling.