John Danner, Date of Birth, Place of Birth, Date of Death
TweetJohn Danner
inventor
Date of Birth: 10-Mar-1823
Place of Birth: Canton, Ohio, United States
Date of Death: 12-Apr-1918
Profession: inventor
Nationality: United States
Zodiac Sign: Pisces 
About John Danner
- 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."
Read more at Wikipedia