{HEAD ~ A tilt bracket} is pivotably mounted to the bottom bracket and slidably mounted to the adjustable bracket so that as the annular collar is rotated about the central spindle to raise and lower {TAIL ~ the adjustable bracket}, the tilt bracket tilts with respect to the longitudinal axis of the spindle 
{ HEAD ~ A tilt bracket } is pivotably mounted to the bottom bracket and slidably mounted to the adjustable bracket so that as the annular collar is rotated about the central spindle to raise and lower { TAIL ~ the adjustable bracket } , the tilt bracket tilts with respect to the longitudinal axis of the spindle
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