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US Patent: 352,070
Magnetic Tack-Hammer
Patentee:
Arthur R. Robertson - Somerville, MA

USPTO Classifications:
335/285, 7/143, 7/901, 81/20, 81/24

Tool Categories:
woodworking tools : hammers : tack hammers

Assignees:
None

Manufacturer:
Arthur R. Robertson - Somerville, MA

Witnesses:
Arthur W. Crossley
A. D. Harrison

Patent Dates:
Applied: May 22, 1886
Granted: Nov. 02, 1886

Patent Pictures: [ 1 | 2 ]
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Description:
The primary focus of this patent is on the "horseshoe" shaped magnetic portion of the hammer. Robertston claims this allows for a stronger magnet to hold larger nails, or smaller brads/tacks more securely, than provided by earlier "bar" type magnetic hammers. He also refers to the horseshoe magnet feature in a 1902 patent (710615).

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