Patent for "a stand, shelf, or holder for attachment to desks...for the purpose of supporting a type-writer [or] reference-book... the object in view being to provide a support of this character with means for attaching the same to a desk and means for swinging or revolving said support so that the... article may be readily and conveniently brought around to the front of the desk for use... and then swung back out of the way upon the side of the desk." (lines 12-24)