“Reginald Ware, Lewiston, Me., filed Oct. 10, 1910

A sash fastener comprising two members, one of which comprises oppositely disposed upwardly projecting guide flanges and a stop pin, and also having at one end an upwardly projecting flange provided with a rounded upper end, the other member comprising a flat bolt having tongues on opposite sides which are adapted to slidably engage said guide flanges, said bolt having on its outer end an overhanging rearwardly projecting transversely curved flange which slidably engages the stop lug on the base plate, said base plate and stop lug providing a housing, a socket in the bolt, a spring mounted in the housing and contacting respectively with the socket and stop flange, and a recess in the bolt to engage the stop pin.”

Reference Data:

Official Gazette of the United States Patent Office, Vol. 171, by United States Patent Office, 1911, page 574