Cook, Gedge or Gilpin?

First Cook patent: 1851

Second Cook patent: 1867 (1 year before previous patent expires)

c-whitehouse-auger-bits-us-patent-no-364153-may-1887-uk-patent-18603-oct-1886 Download

Gedge patent: 1854

First Cook patent has 3 figures: Fig 1, Fig 2 and Fig 4. Where is Fig 3?

Gedge patent has 6 figures.

Super impose Cook on Gedge, and Fig 1, 2 and 4 match almost perfectly, But Gedge has 3 more figures, the missing Fig 3, and Fig 5 & 6 that gives more details.

The second Cook patent will come with a different set of 7 detailed figures

C Whitehouse pretends that Gedge’s patent is “Erroneously called Gilpin’s Patent.” (https://digital.nls.uk/directories/browse/archive/90232903?mode=transcription)

C. Whitehouse left Gilpin in 1867, the year of his US patent #91503 ‘Improved Process for Making Augers and Boring-Bits’ that covers manufacturing of Cook/Gedge as well as Bullnose/Solidnose bits (http://www.datamp.org/patents/advance.php?id=25743&set=3). That same year he was granted a UK patent while still an employee of ‘Messrs Gilpin’ (aka William Gilpin, Senior, and Co) (Source: The Engineer, 1869/05/21, p 356- https://www.gracesguide.co.uk/The_Engineer_1869/05/21)

From the “Encyclopædia britannica; a dictionary of arts, sciences, literature and general information”: “Gilpin or Gedge auger”

C. Whitehouse calls his bullnose bit ‘unbreakable solid wing auger and bits’ (1893)