T hinge

a hinge that looks like the letter T when it is opened; similar to a strap hinge except that one strap has been replaced by half of a butt hinge that can be mortised flush into the stationary frame

開いたときにT字形に見える蝶番；固定枠に平らに埋め込めるよう片側の細長い板が半分の平蝶番に置き換えられている点を除き、ストラップヒンジに類似するもの