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US Patent: 98,180
Method of Heading Screws
Split Saw Nut
David T. Munger - Waterbury, CT

USPTO Classifications:

Tool Categories:
woodworking tools : handsaws : saw nuts

Daniel T. Munger - Waterbury, CT
Rufus E. Hitchcock - Waterbury, CT

Shurly Dietrich - Galt, ON Canada
Richardson Brothers - Newark, NJ
Harvey W. Peace - Brooklyn, NY
Wheeler, Madden & Clemson - Middletown, NY
Peter Gerlach & Co. - Cleveland, OH

Elias Baldwin
J. W. Webster

Patent Dates:
Granted: Dec. 21, 1869

Patent Pictures: [ 1 | 2 | 3 ]
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"Vintage Machinery" entry for Peter Gerlach & Co.
Construction differs from Washborne's patent in that formation is by using a preforated disk with the shank passing thru and then upset to secure the head and shank. This patent marking is reported on several manufacturer's saw medallions and it is likely that they made the nuts under license of the patent holders.

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