Adjustable frictional drag lamp swivel

摘要

A swivel with an adjustable frictional drag is disclosed. The swivel has a first member which has a first side wall surrounding a first axial cavity. The first side wall has a generally transverse bore which is connected to a first tubular lamp arm. The first side wall further has an annular engaging surface adjacent one end. A first end wall which has a first axial bore in communication with the first cavity is connected with the other end of the first side wall. A first bearing surface surrounds the first axial bore. The swivel further includes a second member which has a second side wall surrounding a second axial cavity. The second side wall has a generally transverse bore which receives a tubular lamp arm. The second side wall further has a second engaging surface adjacent one end for sliding engagement with the first engaging surface during relative rotational movement between the first and second members. A second end wall which has an axial threaded bore therethrough is connected with the other end of the second side wall. A swivel pin has a head portion at one end which engages the bearing surface of the first end wall and a threaded portion at its other end which engages the axially threaded bore. A set screw is received in the axial threaded bore for abutting the swivel pin to lock it and the axially threaded bore against relative rotation.