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US Patent: 527,200
Pipe Clamp
Clamps Adapted to Ornamental and Polished Pipes
Patentee:
Charles Hall (exact or similar names) - New York, NY

USPTO Classifications:
269/128, 269/2, 81/185.1

Tool Categories:
wrenches : wrench components : pipe jaw attachments for wrenches

Assignees:
None

Manufacturer:
Samuel Hall's Sons - New York, NY

Witnesses:
J. Staib
Chas. H. Smith
Geo. T. Pinckney
William G. Mott

Patent Dates:
Applied: May 18, 1894
Granted: Oct. 09, 1894

Patent Pictures: [ 1 | 2 | 3 ]
Charles Hall patent October 9, 1894
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HALL*S ELASTIC PIPE CLAMP (FLICKR)
Description:
Hinged "clamp" or non-marring grip -- supplemental wrench jaws -- for soft or smooth finish pipe. The outer sides have flat surfaces. The inner faces were to be covered with rubber or leather.

These were designed to complement Hall's screw-adjust pipe and nut wrench -- see patent nos. 516,485 (3/13/1894), 521,312 (6/12/1894), 523,810 (7/31/1894), 533,295 (1/29/1895), and 586,738 (7/20/1897).

The clamps were advertised in conjunction with Hall's wrenches.

Corresponding British patent GB-189419120 was registered Oct. 9, 1894.

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