Bracelet for total solar shading

The solar bracelet is a shading device which prevents the entry of direct sunlight, but admits direct light from the cones of sky which the sun never enters. It thus has optimal shading properties. Applications of the bracelet in protecting windows of different orientation and slope, at different geographical latitudes, are described. Various forms of geometrical redundancy, which mainly affect other shading devices, are distinguished. The first built embodiment of the solar bracelet principle, in a New Zealand art gallery, is described.