Dial lock

A dial type combination lock comprising a plurality of locking units, each locking unit having a locking means comprising a leading disc having a plurality of holes around the outer edge thereof corresponding to a series of indicia and a connecting shaft projecting from the center thereof, and a locking disc rotatably mounted on said connecting shaft and having a pin adjacent the periphery thereof and engaged in one of the holes in said leading disc and a bolt receiving notch in the outer periphery thereof, and each locking unit having a dial means comprising a cup-shaped dial having an upstanding wall and base, the wall defining an indicia carrying portion on the radial outer surface thereof and a further connecting shaft projecting from the base thereof and telescopically coupled with said connecting shaft on said leading disc so that the dial may move from an inner to an outer position relative to the locking means, an innermost one of said plurality of locking units being mounted on a central supporting shaft and successive locking units having the connecting shafts successively larger in diameter and concentric with each other, said connecting shafts being successively shorter the larger the diameter thereof, the walls of the cup-shaped dials on the successive locking units being nested in each other and the successive locking discs and leading discs of the locking units being side by side, a protecting case around the wall of the dial of the outermost dial means and having an index thereon, whereby the dials must be drawn out from their inner position to their outer position to expose the indicia carrying portion thereof, and at least one supporting member engaged with the locking disc on the outermost locking unit to prevent movement of the locking disc, said protecting case being adapted to be mounted on one side of a member to be locked and the supporting member being adapted to be mounted on the other side of the member to be locked.