John Danner

(1823-1918)

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John Danner (March 10, 1823 - April 12, 1918) invented and patented (May 16, 1876) the pivot and post revolving bookcase. His bookcase hangs suspended from a simple cast iron bearing which sits on top of an inner column or post. The revolving mechanism consists of two nesting cast iron cones that provide a precise pivot point supporting the entire weight of the bookcase. The top support suspension design addressed the binding and racking problems of previous bottom bearing Lazy Susan type bookcases. "These cases, with their immense load, revolve with a slight touch of the hand; are noiseless in operation, and will last a lifetime." Originally designed to hold 32 volumes of the Encyclopedia, it is a compact, rotating bookcase. "It is a square of 22 inches taking up no more room on the floor than an ordinary chair."