| 摘要 |
A pharmacy type lamp having a light source disposed at one end of a tubular swing arm the other end of which extends into a vertically disposed support tube secured to a base pedestal. The tubular support is formed from welded seam tubular stock having extra weld material extending from the seam during the tubes formation to form a rib-like track within the support tube for coaction with stops coined from the material of the swing arm, at an extremity thereof disposed within the support tube to facilitate rotation of the swing arm within the support tube while limiting such rotation to almost 360 DEG . A clutch, carried at one end of the support tube, centers the swing arm therewithin and facilitates gripping and release of the swing arm with respect to the support tube to restrict and permit movement (sliding and rotational) of the swing arm within the support tube. An end ring carried by the swing arm at the extremity thereof disposed within the support tube is notched to receive the rib-like track to further center and guide movement of the swing arm within the support tube.
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