Rotation limiting ball-joint conduit apparatus

A ball-joint conduit apparatus for the adjustable mounting and electrical connection of an electrical fixture to a desired fixed service mount, comprising:

• a cylinder which is adapted to allow passage of electrical wire through its longitudinal axis and which has opposed first and second cylinder ends;
• said first cylinder end including integral means for attaching said cylinder to an electrical fixture, said means allowing passage of electrical conductors through it and into said cylinder;
• said second cylinder end including a spherical flange extending radially around a circumference of said cylinder end defining a ball member;
• said spherical flange having at least one flat exterior surface, said flat surface being formed in the plane of a chord of said spherical flange with said chord being parallel with a longitudinal axis of said cylinder;
• a C-shaped collar having an inner surface, an outer circumferential surface, opposed sides and offset ends;
• said offset ends being in parallel alignment and having a space between them;
• said collar inner surface being semi-spherically concave defining a socket adapted to receive said spherical flange of
• said cylinder for pivotal movement therein;
• means to reduce a diameter of said C-shaped collar once said spherical flange is received therein so that said flange is kept therein and frictionally stabilized once adjusted to a given position;
• means to attach said C-shaped collar to a fixed service mount, said means allowing passage of electrical conductors through it and into said cylinder;
• an indexing member extending from said collar inner surface to a point centered above said at least one flat surface of said spherical flange;
• said indexing member being located so that said indexing member engages only upon a point along a periphery of said flat surface of said spherical flange when said spherical flange is rotated, thus preventing further rotation in that direction.