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US Patent: 240,882
Lead Seal Press
Patentee:
Joseph W. Calef (exact or similar names) - North Easton, MA

USPTO Classifications:
140/152, 140/153, 30/185

Tool Categories:
pliers

Assignees:
Joseph W. Calef - North Easton, MA
George B. Parkinson - Boston, MA

Manufacturer:
Not known to have been produced

Witnesses:
August Peterson
James H. Mandeville
Fred. G. Dieterich
P. C. Dieterich

Patent Dates:
Applied: Mar. 05, 1881
Granted: May 03, 1881

Patent Pictures:
Joseph W. Calef patent May 3, 1881
USPTO (New site tip)
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Description:
The sliding jaw is actuated by a lobe on the movable handle. The design is reminiscent of Calef's self-adjusting nut wrench (pat. no. 226,490). Calef proposed other applications for the sliding jaw in patents for punches (pat. no. 240,883) and shears (pat. no. 240,884).

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