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US Patent: 191,026
Tool For Tightening and Fastening Straps For Securing Hose To Coupling
Patentee:
John A. Caldwell - Boston, MA

USPTO Classifications:
285/252, 29/268, 59/29, 81/9.3

Tool Categories:
pliers

Assignees:
None

Manufacturer:
Unknown

Witnesses:
W. J. Cambridge
J. E. Cambridge
N. W. Stearns

Patent Dates:
Applied: Apr. 19, 1877
Granted: May 22, 1877

Patent Pictures: [ 1 | 2 ]
John A. Caldwell patent May 22, 1877
USPTO pdf tiff
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Description:
The tool is a pliers that is pivoted to expand the jaws when the handles are squeezed. It is designed to work with strap type hose clamps patented by Samuel Adlam, Jr. and assigned to John Caldwell (pat. no. 190,728). Caldwell Hose Straps and these pliers appear in hardware catalogs well into the 20th Century.

Caldwell patented another version to work with a single strand wire clamp later in 1877. (Patent no. 197,717).

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