Patent for a new and improved sash holder. This design "consists in supplying the sash with two spring-actuated cams—one upon each side—which cams in their normal condition press against the frame and hold the sash, but are simultaneously withdrawn and held out of contact with the frame by the partial rotation of a cylindrical operating-handle, with which the cams are connected by suitable rods, said handle also furnishing the means by which the sash is raised and lowered" (lines 41-50).