Patent for a new and improved sash-fastener. This design consists "[t]he combination, [of] an angle-bracket having an opening produced in its horizontal member wider at its top than at its bottom, and an essentially yoke-shaped bar passed through the said opening, [and] a thumb-lever hinged in the vertical member of the bracket, extending over and parallel with the horizontal member of said bracket, and a lip integral with the under edge of the lever, concavo-convex in cross-section, and capable of entering the opening in the bracket and contacting with . . . the yoke-like bar" (lines 7-19).