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GB Patent: GB-137,182
Improvements relating to wood mortising machines
Turret-head hollow-chisel and chain-cutter mortiser
Patentee:
William Blackett Haigh - Manchester, England

USPTO Classifications:

Tool Categories:
woodworking machines : joint making machines : mortising machines
woodworking machines : wood drilling and boring : mortising machines

Assignees:
Oliver Machinery Co. (UK) - Manchester, England

Manufacturer:
Oliver Machinery Co. (UK) - Manchester, England

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 15, 1919
Granted: Jan. 08, 1920

Patent Pictures:
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"Vintage Machinery" entry for Oliver Machinery Co. (UK)
Description:
The William Blackett Haigh who founded W. B. Haigh & Co. lived 1820-1883. The inventor of this patent was perhaps a grandson.

This invention is a means of converting a hand-operated chain mortiser to a power mortiser.

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