Specification of Thomas Brown : artificial limbs.

  • Brown, Thomas.
Date:
1867
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Thomas Brown : artificial limbs. Source: Wellcome Collection.

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    Artificial Limbs. c LETTERS PATENT to Thomas Brown, of No. 96, Newgate Street, in the City of London, Civil Engineer, for the Invention of Improvements in Artificial Limbs.”—A communication from abroad by Amasa A. Marks, of the Cityj County, and State of New York, United States of America. Sealed the 22nd November 1867, and dated the 6th June 1867. PROVISIONAL SPECIFICATION left by the said Thomas Brown at the Office of the Commissioners of Patents, with his Petition, on the 6th June 1867. I, Thomas Brown, of No. 96, Newgate Street, in the City of London, 5 Civil Engineer, do hereby declare the nature of the said .Invention for “ Improvements in Artificial Limbs,” a communication, to be as follows:— The first part of the said improvements relates to the knee joint of an artificial leg and to the means for holding the said joint in any desired position, and consists chiefly in the employment of a T-shaped bracket or 10 standard, which takes the place of the tibia, and whose lower or T-shaped end is provided with journals, which are fitted to work freely in oblique boxes secured in the interior of the knee pan. The centres of the said boxes coincide with the centre of the said knee pan, and these boxes are so situated that they are readily accessible, so that their caps can be easily removed when it is 15 desired to separate the parts of the leg. When the knee joint is bent, as in sitting, it is retained in position by the action of a pear-shaped button with a spherical head, which works in a socket formed in the head of an oscillating vertical sliding rod or bolt; this rod or bolt is acted on by a spring, and is so situated in relation to the head of the button that when the knee joint is bent