IMPROVED TRUSS SPRINGS FOR VARIOUS KINDS OF HERNIA AND DISTORTIONS OF THE HUMAN BODY
Year: 1879

page_text: LETTERS PATENT to James Coxeter and Samuel Joseph Coxeter, of 23 and 24,
Grafton Street East, Tottenham Court Road, in the County of Middlesex,
Surgical Instrument Makers, for the Invention of "IMPROVED TRUSS SPRINGS
FOR VARIOUS KINDS OF HERNIA AND DISTORTIONS OF THE HUMAN BODY."
Sealed the 12th March 1880, and dated the 20th September 1879.
PROVISIONAL SPECIFICATION left by the said James Coxeter and Samuel
..Joseph Coxeter at the Office of the Commissioners of Patents on the 20th
September 1879.
JAMES COXETER and SAMUEL JOSEPH COXETER, of 23 and 24, Grafton Street
East, Tottenham Court Road, in the County of Middlesex, Surgical Instrument
Makers. "IMPROVED TRUSS SPRINGS FOR VARIOUS KINDS OF HERNIA AND
DISTORTIONS OF THE HUMAN BODY."
The ordinary kind of truss springs for hernia have hitherto been made of sheet
steel, cut in strips of pieces of flat steel rolled to the required width and strength,
or forged from a bar of steel to give great strength; or of strong wire for the same
purpose, each curved to the form of the human body.
The improvement consists in baving rolled steel strips, or sheet steel cut into
strips, and made into springs of various thicknesses.
These are swaged to the form here given in cross section, thus,
This
particular form of swaged steel is very strong, with very little weight, and also
gives fixed pressure, with very great rigidity when required.
To prepare this truss steel, we prefer to use an arrangement of mechanism of the
following character, viz.:-
Two rollers fitting one to the other, the top being the convex shaped roller and
the bottom the concave one. The whole arrangement being settled so that the
springy material to be brought into shape may be effectually operated on.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Ooxeter and Samuel Joseph Coxeter in the Great Seal Patent
Office on the 19th March 1880.
JAMES COXETER and SAMUEL JOSEPH COXETER, of 23 and 24, Grafton Street
East, Tottenham Court Road, in the County of Middlesex, Surgical Instrument
Makers. "IMPROVED TRUSS SPRINGS FOR VARIOUS KINDS OF HERNIA AND
DISTORTIONS OF THE HUMAN BODY."
The ordinary kind of truss springs for hernia have hitherto been made of sheet
steel cut in strips or of pieces of flat steel rolled to the required width and strength,
or forged from a bar of steel to give great strength, or of strong wire for the same
purpose, each curved to the form of the human body.
The improvement consists in having rolled steel strips or sheet steel cut into
strips and made into springs of various thicknesses. These are swaged to the form
here given in cross section, thus,"
This particular form of swaged steel is very strong, with very little weight, and
also gives fixed pressure with great rigidity when required.
To prepare this truss steel, we prefer to use an arrangement of mechanism of
the following character, viz.:-Two rollers fitting one on the other, the top being
the convex shaped roller and the bottom the concave one, the whole arrangement
being settled so that the springy material to be brought into shape may be
effectually operated on. In giving practical effect to our Invention we have found
it desirable to swage the spring to such a depth as to give it sufficient rigidity
combined with elasticity, so that a spring made according to our Invention, will
when finished always maintain, or nearly so, the same form and elasticity of
action.
In making the depression in the spring it is necessary to make the groove more
or less deep, which is effected by passing the spring one or more times between the
rollers, same to be adjusted to effect this object.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed or put in practice, we
hereby declare that we claim the Invention of "Improved Truss Springs for
Various Kinds of Hernia and Distortions of the Human Body" constructed sub-
stantially in manner hereinbefore set forth and described.
In witness whereof, we, the said James Coxeter and Samuel Joseph Coxeter,
have hereunto set our hands and seals, this Eighteenth day of March, in the
year of our Lord One thousand eight hundred and eighty."
JAMES COXETER.
(L.S.)
Witness,
Wm Hillier.
SAMUEL JOSEPH COXETER. (L.S.)
Clerk to Inventors' Patentright Ass³., Lª.,
21, Cockspur Street, S.W.