Sequestered pin box hinge and mortising jig for hinge installation

A box hinge, comprising:

• two hinge members, each comprising a cylinder having a longitudinal axis, an end with at least a portion of a dome formed thereon, and a planar face penetrated by a blind bore and
• at least one pin captured between hinge components in blind bores in such components, at least one of which components is one of the two hinge members,
• wherein the planar faces are normal to the longitudinal axes of the hinge members, the blind bores are coaxial with the longitudinal axes, and the hinge members rotate about the sequestered pin on the longitudinal axes, and each of the hinge members is penetrated by a hole threaded to receive a screw for securing the hinge member to a box or other component.

A box hinge, comprising:

• two hinge members, each comprising a cylinder having a longitudinal axis, an end with at least a portion of a dome formed thereon, and a planar face penetrated by a blind bore and
• at least one pin captured between hinge components in blind bores in such components, at least one of which components is one of the two hinge members,
• wherein the planar faces are normal to the longitudinal axes of the hinge members, the blind bores are coaxial with the longitudinal axes, the hinge members rotate about the sequestered pin on the longitudinal axes, and further comprising a third hinge member comprising a cylinder having a longitudinal axis and two ends normal to the longitudinal axis of the third member and blind bores coaxial with the third member longitudinal axis for receiving the two sequestered pins, one of which pins is captured between the third hinge member and one of the two hinge members, and the other of which pins is captured between the third hinge member and the other of the two hinge members.