Abstract: A combination-controlled lock assembly for use with a journal or book, such as a diary, which comprises a lock housing, a first cover clamp securing the housing to one book cover, a second cover clamp affixed to the other book cover and having a latch element thereon which is intermateable with said housing, a latching plate slidably disposed within said housing, said plate having an open hook-shaped receptacle aligned for intermating with said latch element and slidable with said plate between a latching position and a retracted position, and combination-controlled means for selectively enabling the latching plate to slide within said housing between said positions.

Abstract: Anti-theft apparatus and method for displaying merchandise cards containing merchandise such as jewelry are disclosed. The apparatus in its locked position substantially hinders unauthorized removal of the cards, whereas in the unlocked position, the cards may be removed easily. Fresh cards may be added to the display unit whether the device is in its locked or unlocked position.