Tripod with adjustable, polygonal, telescoping legs

In a tripod with adjustable telescoping legs, each of said legs comprising an inner prismatic leg and an outer substantially similar prismatic leg, said legs having cross-sections which are polygonal, each of said legs having a base surface with lateral surfaces extending therefrom to surfaces forming obtuse angles with said lateral surfaces, said outer leg having surfaces with obtuse angles slightly greater than the obtuse angles of said inner leg surfaces, said base surface of said outer leg comprising an outwardly extending section, a spring-biased roller member disposed transversely between said outwardly extending section and said base surface of said inner leg whereby said roller member upon extension of said legs to any position can be wedged between said outwardly extending section and said inner leg base surface thereby forcing said inner leg obtuse surfaces against said outer leg obtuse surfaces to secure said legs in a clamped position, and release means for depressing said roller member away from said outwardly extending section to thereby release said legs from said clamped position.