Bench-desk adjusting top - has frame cross bar, two pairs of swivel arms, dovetail groove and clamp

摘要

Bench/desk height and/or angle adjusting top is hinged to the crossbar of the frame by two pairs of swivel arms. Each arm should ' be divided vertically into two halves (20.20'), to form a dovetail groove (41), as a concave arc at the arm ends (21,21') facing towards the frame crossbar. The groove in turn encloses a convex arcuate dovetail piece which is lined up vertically and adapted to the composite arm swivel range. The two arm halves (20,20') can be clamped relative to one another adjacent to their ends (21,21') so the dovetail groove (41) clamps round the dovetail piece to hold the adjusted arm angle. The arm can swivel as required when the clamp is released. ADVANTAGE - The desk/bench top can be angled and locked thus as required by simple arm clamp system in quick time for convenience.