US Patent: 283,341 - Hollow-chisel mortising machine


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US Patent: 283,341

Mortising machine
Hollow-chisel mortising machine

Patentee:

Ralph S. Greenlee (exact or similar names) - Chicago, IL

USPTO Classifications:

144/78, 144/84

Tool Categories:

woodworking machines : joint making machines : mortising machines

woodworking machines : wood drilling and boring : mortising machines

Assignees:

Robert L. Greenlee - Chicago, IL

Manufacturer:

Greenlee Brothers & Co. - Chicago, IL

Witnesses:

Edward G. Siggers

J. R. Littell

Patent Dates:
Applied:	Mar. 30, 1883
Granted:	Aug. 14, 1883

Patent Pictures:

USPTO (New site tip)
Google Patents
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Vintage Machinery entry for Greenlee Brothers & Co.

Description:

Another step in the evolution of the hollow-chisel mortiser. The first Greenlee design can be seen in patent 199,285. Like this patent, the earlier design is horizontal. The major difference is that in the older design, the bit and chisel were separate and entered the work from opposite sides, which limited it to through mortises.