Door hinge coupling device

In a hinge of the type having two hinge plates pivotally connected about a pintle axis to each other by a pin, the improvement which comprises,

• an elongated slot of uniform width having opposite ends with a longitudinal axis formed in one of said hinge plates, said axis being perpendicular to said pintle axis, and
• a projection bent outwardly from said other hinge plate along a line perpendicular to said pintle axis to extend normally therefrom penetrating said slot to bear firmly against both ends of said slot whenever said hinge is closed, whereby said projection has two oppositely disposed contacting surfaces, one contacting surface being no greater than a right angle and the angle of the second contacting surface being an acute angle relative to said other hinge plate, both said contacting surfaces bearing against opposite ends of said slot when said hinge is closed.