100 can be directly pressed on loop 12 of the latch system so that the loop 12 engages with the arcuate leading edge 110 f of the pawl 110 to urge the pawl 110 upwardly when the loop 12 clears past the tooth 110 a of the pawl 110 the pawl 100 will remain open as per above further urging of the loop 12 into the coupling and into engagement of the notch 110 e of the pawl 110 causes the desired counterclockwise movement of the pawl 110 and resultant locking the foregoing coupling configuration of the present invention provides a fail safe interconnection that is not possible in the prior art if any of the springs 122 128 fail the pawl 110 will remain locked for example if spring 122 fails the spring biasing of the impact member 126 by spring 128 would continue to urge the pawl 110 counter clockwise which results in continued downward pressure onto the carriage 116 on the other hand if the lower spring 128 fails the spring biasing of the carriage 116 by upper spring 122 would still prevent counterclockwise rotation of pawl 110 thereby preventing the pawl 110 from opening as a result the carriage 116 would remain underneath the pawl 110 thereby maintaining a locked condition it should be noted that the coupling 100 of the present invention can be made of any suitable materials for example the.