US Patent: 483,968 - Window-frame pocket


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US Patent: 483,968

Window-frame pocket

Patentee:

Francis V. Phillips (exact or similar names) - Chicago, IL

USPTO Classifications:

49/448

Tool Categories:

woodworking machines : specialty woodworking machines : window making machines

Assignees:

Smith & Phillips Mfg. Co. - Chicago, IL

Manufacturer:

Smith & Phillips Mfg. Co. - Chicago, IL

Witnesses:

Unknown

Patent Dates:
Granted:	Oct. 04, 1892

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Smith & Phillips Mfg. Co.

Description:

The innovation here is to cut kerfs in a rectangle on either side of a window stile so the two sets of kerfs do not quite intersect. A hammer blow then causes the wood between the kerfs to split, creating a pocket cover and a stepped opening, so that the cover sits exactly flush in the opening. A machine using this system was seen in an 1898 advertisement from Smith & Phillips Mfg. Co.