Storage box closure control

In a storage box having an upwardly opening receptacle having a rear portion defining a top edge portion and a rear wall, and a heavy metal closure swingably mounted to said rear wall for selective positioning in a raised, open position and a lowered, receptacle-closing position, said closure having articulated portions including a front portion extending substantially vertically in the different positions of the closure, the improvement comprising:

• an elongate, longitudinally expansible spring having a lower end and an upper end;
• means for connecting said lower end to said receptacle rear portion;
• and
• means for connecting said upper end to said closure adjacent said rear wall, said spring developing a lifting force preselected to be slightly less than the downward force caused by the weight of the closure in said receptacle-closing position, slightly more than the downward force caused by the weight of the closure in said open position, and substantially equal to the downward force caused by said closure in an intermediate position intermediate said receptacle-closing and open positions, said closure front portion being juxtaposed to said receptacle top edge portion in said intermediate position whereby downward movement of said closure from said open position as by being wind-blown results in a substantially weight-balanced engagement of said closure front portion with said receptacle top edge portion for preventing injury to a user's hands or the like disposed therebetween as upon such downward movement.