| 摘要 |
<p>A locking assembly for an adjustable arm having a plurality of sections joined together by a ball and socket joint, the adjustable arm being of the type where a compressive force is applied to a ball and socket joint to lock all joints against relative movement, comprises a first push rod (26) slidably mounted in a guide frame (17) the first push rod (26) acting to apply said compressive force, and control means including a lever (16) that is pivotably mounted on said guide frame (17), said lever (16) having an arcuate camming surface (25) so made and arranged that pivotal motion of said lever (16) about its pivot point (23) urges the arcuate camming surface (25) into abutment with the first push rod (26) thereby causing the first push rod (26) to slide within said guide frame (17) whereupon said compressive force is applied. A support system including an adjustable arm which is lockable under the control of the locking assembly, a pivotable support adapted to be supported in an adjustable arm and a clamp adapted to fix the support system to a table or the like also form part of the disclosure. A variety of implements can be moveably supported using the support system.</p> |
