Wilton Diptych execution of Charles I. Wilton Diptych The Wilton Diptych () is a small portable diptych of two hinged panels, painted on both sides, now in the National Gallery, London. It is an extremely rare survival of a late Medieval religious panel painting from England. The diptych was painted for King Richard II of England who is depicted kneeling before the Virgin and Child in what is known as a donor portrait. He is presented to them by his patron saint, John the Baptist, and by the English royal saints Edward the Confessor and Edmund the Martyr. The painting is an
Hinged expansion joint joints used in piping systems are restricted to pure angular rotation by its hinges. As a pair, hinged expansion joints will function together to absorb lateral deflection. Advantages of hinged expansion joints are that they are typically compact in size and structurally rigid. Hinged expansion joint A hinged expansion joint is a metallic assembly, that can rotate in a single plane, used to absorb changes resulting from piping thermal expansion or contraction. They include hinges, attached to the expansion joint ends with a pair of pins, which allow angular movement in a single plane, restrain the pressure thrust, and prevent