Adjustable lighting fixture

An adjustable fixture for holding a lamp of the type having a rim, the fixture comprising:

• a lampholder including front and rear generally parallel, spaced, generally U-shaped members, each member including a base section adapted to engage and hold the lamp proximate the rim thereof, and a pair of generally straight parallel sections extending from each end of the base section;
• an elongated bridging member extending between the straight sections of each of the U-shaped members for interconnecting the straight sections, the bridging member having at least one end having a generally flat surface, and including a generally cylindrical first bore of a first predetermined diameter in the one end and a threaded, generally cylindrical second bore concentric with the first bore, the second bore having a smaller diameter than the first bore, and extending into the bridging member from the first bore;
• a support arm member having at least one generally flat surface and at least one aperture sized not substantially less than the first predetermined diameter extending therethrough;
• and
• a knob member having a body adapted to be gripped by an operator, and a generally cylindrical sleeve extending from the body, the sleeve having an outer diameter substantially the same as the first predetermined diameter, the body having a generally flat surface proximate the sleeve and extending perpendicularly thereto, the knob member also having a threaded section coaxial with and extending beyond the sleeve, the threaded section of the knob member being rotatably received within the threaded second bore of the bridging member, the sleeve being rotatably received within the first bore of the bridging member and the support arm member aperture so the support arm member is between the one end of the bridging member and the flat surface of the knob member;
• whereby inward rotation of the knob member secures the bridging member to the support arm member.