Patent ID: 8403515

Claim:
An adjustable comprising: a light module comprising a housing, a light emitter, an electric power source, and a switch for selectably connecting the power source to the light emitter; and a mounting base having a back part attachable to a supporting article and a front part on which the light module is removably mountable; in which the front part of the mounting base is formed with a pair of slots, each slot having an elongated arcuate edge extending along its length, said arcuate edges being concentric, and said slots being undercut along said elongated arcuate edges whereby each slot has an internal retaining surface extending along its elongated arcuate edge and facing toward said back part of the mounting base; in which the light module has first and second hooks protruding therefrom, extending respectively into said slots, and engaging the respective internal retaining surfaces of said slots to prevent separation of the light module from the mounting base while permitting rotation of the light module relative to the base about an axis of rotation extending through a center point defined by said concentric arcuate edges; in which each of the slots has a hook entry clearance at one of its ends, said clearances permitting entry of said hooks into the slots by movement of the light module in the direction of said axis of rotation followed by rotation of the light module, and in which the arcuate edges of said slots extend from said clearances in the same circumferential direction, whereby the hooks can be engaged with the retaining surfaces by rotation of the light module in said circumferential direction; in which the mounting base includes a series of protrusions accessible by at least one of said hooks through least one of said slots, said protrusions being spaced from one another to define a series of depressions, each depression being capable of receiving a part of one of said hooks, said protrusions resisting movement of said one of said hooks along the length of said at least one slot, but each protrusion being resiliently movable as a whole whereby said one of said hooks can move from one depression to a next depression when a rotational force is applied to the light module: in which the mounting base includes a sheet of spring metal contained in a polymeric resin housing, the slots are formed in the polymeric resin housing, and the series of protrusions is formed on the sheet of spring metal; and in which the sheet of spring metal is supported within the mounting base with a space behind said sheet of spring metal, between said sheet of spring metal and the back part of the mounting base, whereby said protrusions are resiliently movable into said space.