Walter Schlage patented his unique wafer lock system in 1927 (Patent No. 1,691,529). At the time the design was quite innovative. It was one of the first locks suitable for permanent mounting in a door that was constructed entirely from stamped metal parts, it was of the first commercially successful examples of the now common cylindrical bore format of locks, and coincidentally was remarkably resistant to weather and debris. Schlage’s company would continue to make improvements on the design for the next four decades before finally ceasing production sometime after 1960.While these locks are now considered to offer very little in the way of security they have hung on long enough to be considered important for maintaining the historic aesthetic of buildings from the 1930s through the 1960s.
After extensive research, we have compiled the following key bitting specification for the Schlage wafer:
For more information on the Schlage wafer lock, see the following: