| 摘要 |
A foldable book support comprises a rotatable vertical stem (12) an arm (14) pivotted thereto and bearing rotatably and lockable, by a lock nut (18), an extension (16) which is attached by a bracket (18) to one edge of a book rest (22). The bracket (18) is slidable by its tongue (21) in a groove (24) within the book rest, and an extension ofthe bracket passes beneath the book rest and is slidably engaged in a rod (28) attached at its ends to the underside of the book rest, which is made in two parts foldably hinged (26) together. From a compact stored position shown in broken line in Fig. 1, the book support is opened by pivotting the folded rest 22 and arm 14, 16 upward, and rotating them upon the stem 12; the arm extension 16 is pulled out and rotated as desired, and the support is adjusted to a suitable height by sliding the bracket 18 on the rod 28. The support may be folded into the wall of an enclosure 40. <IMAGE> |
