Non-abrasive clutch for pharmacy style lamps

A pharmacy style lamp assembly comprising:

• a support means for supporting the lamp assembly on an associated structure;
• a cylindrical bearing surface which is defined by and integral with a clutch block, the clutch block being mounted with the supporting means such that a central axis of the cylindrical bearing surface is vertically disposed;
• a generally L-shaped tube having a lower portion slidably and rotatably received within the cylindrical bearing surface, an upper portion for supporting a socket assembly, and a hollow, internal passaage for receiving a power cord;
• the clutch block being integrally constructed of a material which is non-abrasive relative to a surface of the L-shaped tube lower portion such that sliding and rotational movement of the tube lower portion within the cylindrical bearing surface does not scratch the tube lower portion surface;
• and,
• a frictional engagement adjusting means for adjusting an amount of frictional engagement between the tube lower portion and the clutch block to facilitate rotary and sliding adjustment of the L-shaped tube relative to the clutch block.

A clutch block assembly for a pharmacy style lamp, the clutch block assembly including:

• a cylindrical bearing surface which is defined by and integral with a unitary, plastic clutch block, the clutch block defining a threaded bore which extends transverse to a central axis of the cylindrical bearing surface;
• a threaded member which has a threaded, plastic inner end which is threadedly received in the clutch block threaded bore for selectively engaging a tubular member received therein, the threaded member having a manually graspable portion at an outer end thereof to facilitate manual adjustment and positioning of the threaded element inner end;
• and,
• mounting means operatively connected with the clutch block for mounting the clutch block to a support means for supporting the clutch block on an associated structure.