| 摘要 |
A ball tilt joint permits a wired mounted unit, preferably a TV (monitor) to be rotated and tilted for viewing, without breaking wires. An axial hole through the ball stem allows electrical wires to be fed to the unit. The ball stem has limited rotation, due to stop screws. A ball socket carries the wired unit, and the socket can tilt about the ball center, but not rotate on the ball around the ball stem axis, because of a socket pin which extends into a slot machined into the ball. The pin is oriented radially towards the ball center, and everything is mounted to the end of an articulatable arm.
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