Locking Nuts Vogt Original Patent Lithograph 1889

Locking Nuts Vogt Original Patent Lithograph 1889


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DESCRIPTION:

On this original linen-backed lithograph from 1889, A. Vogt patented improvements in locking nuts. A screw of a less diameter than the bolt and with a thread of the same pitch, but of an opposite hand to that of the bolt is arranged to bear against it. This screw may be pivoted to the nut by a stem or to an additional lock nut; or, as in Fig 8, it may lie in a groove in the nut.

All patent lithographs sold by Maymont Group are 100% ORIGINAL.

These documents are NOT reproductions or posters (patent art).

These are the original lithographs found in books obtained from the Patent and Trademark Office directly.

 

In the 1800's and early 1900's, inventors would submit a detailed drawing of the invention and/or improvements to the patent and trademark office. Once received and if approved, the Patent office would then send a letter of confirmation to the inventor and begin to take that drawing and etch it into stone in order to create and print this linen-backed lithograph. These documents are the original hard copies that were created by the patent office's artists, and act as patent examiner reference material. With that being said, these are 100% original and are the only physical copies in existence.

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