Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted

Full Title

Props (in the building art E04G25/00); Chocks > Telescopic props (general means for fixing telescopic parts together ) > with parts held relatively to each other by friction or gripping > Collar or other support gripped to one or both parts by toggle-action, cam, or other member pivoted or similarly mounted