Patent ID: 8641224
Filing Date: 2014-02-04
Classification: A47B,F21V,F21Y

Abstract:
1. A low profile lamp for use within a table top having a top surface, wherein the table top defines a cavity with a first effective diameter and a first effective depth, the lamp comprising; at least one housing comprising a bottom and an outer wall, the outer wall and bottom defining a compartment with a top opening, the compartment having a second effective depth less than the first effective depth, the outer wall having an outer surface with a second effective diameter less than the first effective diameter such that substantially all of the housing may be placed within the cavity, and wherein the housing further comprises an inner vertical surface that defines a first set of threads; a fastener for fastening the housing to the table top when the housing is placed within the cavity; at least one electric light source; an electric power supply and circuitry in electrical communication with the electric power supply and the at least one light source to power the at least one light source; wherein the circuitry further comprises a switch for controlling said light source, and wherein the at least one electric light source, the electric power supply, the circuitry, and the switch are positioned within the compartment of the housing; a top cover comprising a crown and a post extending downwardly from the crown, said post defining a second set of threads adapted to mate with the first set of threads; a horizontally disposed light diffusion dish with a third effective diameter less than or equal to the first effective diameter, and defining a central orifice for receiving said post while exposing a cross sectional transmissive surface of the light diffusion dish to the central orifice; wherein the light diffusion dish is adapted to be engaged with the top cover and positioned over the housing while fastened to the table top within the cavity, such that the central orifice receives the post; wherein the top cover and the light diffusion dish may be rotated relative to the housing in a desired direction so that the post may be rotatably joined to the housing via the mating of the first and second sets of threads, removably sealing the compartment with the light diffusion dish and the top cover; and wherein such rotation of the top cover and the light diffusion dish increases the degree of mating of the first and second sets of threads, and the light source is configured such that increasing the degree of mating of the first and second sets of threads increases exposure of the cross sectional transmissive surface to the light source, increasing light transmitted into the light diffusion dish.