Adjustable support

An adjustable support comprising:

• a first support means;
• a second support means operatively disposed adjacent to said first support means;
• a spring under compression biasing said second support means into abutting relationship with said first support means;
• engagement means positioned between the first and second support means in the form of a first set of teeth provided radially about an inner peripheral edge of a frusto-conical recess portion of said first support means and a second set of teeth engageable with said first set and provided radially about an inner peripheral edge of a frusto-conical projection of said second support means, said first and second sets of teeth locking said first and second support means together when in said abutting relationship and said frusto-conical recess of said first support means including an inner bore and said frusto-conical projection of said second support means including a projecting portion which when in said abutting relationship fits within said inner bore of the first support means;
• mounting and operating means being provided which enable said first and second support means to be disengaged from said abutting relationship against the bias of said spring, the mounting and operating means having a pin one end extending through a bore in said second support means to contact said first support means, the pin within the bore having thereon said spring one end of which contacts a flange portion within said bore in said second support means, the other end of said spring contacting a cover knob on the other end of the pin, the cover knob substantially filling an open end of the bore for concealing said spring within said bore, the mounting and operating means being fixed relative to the first support means wherein manual pressure applied axially to the second support means causes the second support means to laterally move relative to the first support member to thereby release the first and second sets of teeth from engagement thus allowing rotational movement of the first and second support means relative to each other to a new position in which release of the axial pressure allows said spring to return said second support means to said abutting relationship.