bolt 18 a pair of tension springs 80 and 82 encircling the pins 68 70 having one end connected to the latching members 20 22 and their other ends connected to the base 50 of the receiver support 46 bias the latching members 20 22 toward each other and the latched position when the closure 14 approaches the closed position the frusto conical members 34 and 36 of the latch bolt 18 serially come in contact with the latching members 20 22 and force the latching members 20 22 to cam outwardly toward the unlatched position as shown in fig3 once the shoulders 38 40 of either frusto conical member 34 36 of the latch bolt 18 passes by the latching members 20 22 the latching members 20 22 are free to be biased by the tension springs 80 82 back to the latching position and to engage the distal end 32 of the latch bolt 18 once in the latched position as shown in fig1 and 2 the latch bolt 18 is positively restrained from moving axially outward toward the open position to release the latch bolt 18 from the latched position a cam plate 84 is provided to cam the latching members 20 22 outwardly in opposition to the biasing force of the springs 80 82 toward.