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US Patent: 115,678
Improvement in Pipe-Wrenches
Patentee:
William Henry Barwick - Montreal, QC Canada

USPTO Classifications:
81/186, 81/98

Tool Categories:
wrenches : pipe wrenches : pipe tongs

Assignees:
None

Manufacturer:
Barwick Wrench Co. - Boston, MA
Billings and Spencer Co. - Hartford, CT

Witnesses:
Wm. H. C. Smith
P. C. Dieterich
Charles Legge
Charles G. C. Simpson

Patent Dates:
Granted: Jun. 06, 1871

Patent Pictures: [ 1 | 2 | 3 ]
William Henry Barwick Pat. June 6, 1871
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BARWICK WRENCH - edited from Oct. 1872 INDUSTRIAL MONTHLY (FLICKR)
Description:
The shape of the hook jaw allows each size of wrench to grasp a range of pipe sizes. Hardware trade ads also show the wrench used on square and hexagon nuts. The specifications describe it as an improvement on Robert Bain's April 9, 1867 patent (no. 63,689), and Henry Getty's Jan. 13, 1863 patent (no. 37,395).

A Canadian patent CA-909 was issued for this wrench on April 4, 1871.

By 1876, Billings & Spencer had "purchased the entire stock, machinery, patent rights and good will" of the Barwick Wrench Company.

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