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Fig. 2. Schematic of weighing system: (A) pneumatic cylinder, (B) main upright tube ("U" shaped) of the support frame, (C) hanging scale attached to pneumatic cylinder, (D) sling link, (E) horizontal bar of lifting arm apparatus attached to hanging scale's slip hook using a clevis and sling link, (F) vertical rods hinged to top horizontal bar, (G) trigger mechanism for activating the pneumatic cylinder (see Fig. 3 for details), (H) rear upright tube of the support frame, (I) middle U-shaped support tubing attached to upright frame, (J) base U-shaped tube, (K) gusset support tubing attached to upright frame and U-shaped base tubing, (L) bent plate to catch container handle during weighing attached to vertical rod, (M) clevis, and (N) slip hook.
