NEW AND USEFUL IMPROVEMENTS IN THE CONSTRUCTION OF ELASTIC TRUSSES FOR RUPTURES
Year: 1801

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
BARTLETT, of Boston, in the State of Massachusetts, North America, but at
present residing in Threadneedle Street, in the City of London, send greeting.
WHEREAS His most Excellent Majesty King George the Third, by His
Letters Patent under the Great Seal of the United Kingdom of Great Britain
and Ireland, bearing date at Westminster, the Eighteenth day of June,
in the forty-first year of His reign, did give and grant unto me, the said
Thomas Bartlett, His especial licence that I, the said Thomas Bartlett, during
the term of years therein mentioned, should and lawfully might use, exercise,
and vend, within England and Wales, and the Town of Berwick-upon-Tweed,
an Invention of "NEW AND USEFUL IMPROVEMENTS IN THE CONSTRUCTION
OF ELASTIC TRUSSES FOR RUPTURES;" in which said Letters Patent there
is contained a proviso, obliging me, the said Thomas Bartlett, by an instrument
in writing under my hand and seal, to cause a particular description of the
nature of the said Invention, and in what manner the same is to be performed,
to be inrolled in His Majesty's High Court of Chancery within one calendar
month after the date of the said recited Letters Patent, as in and by the
same, relation being thereunto had, may more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Thomas Bartlett, do hereby declare that the said Invention is described by the
Drawing and the description thereof hereunto annexed.
In witness whereof, I have hereunto set my hand and seal, the
Twenty-seventh day of June, in the year of our Lord One thousand
eight hundred and one.
THOMAS BARTLETT. (L.s.)

page_text: DESCRIPTION OF THE ABOVE DRAWING.
The improvements consist in connecting the head of the truss to the circum-
ference spring A, by means of a hinge B, and in annexing to the plate C,
which is made in an oblong diagonal form, a steel spring D, which is fastened
to it at the lower end with a screw, while the upper end bears against the
hinge, and closes or expands according to the degree of pressure made against
the truss by the body. By this construction the lower end of the pad is gently
impelled against the rupture, and yields to the motion of the body, so as to
produce an effect similar to that of the hand when applied to the part affected.
The screw answers a threefold purpose; 1st, in securing the steel spring to
the plate; 2d, by increasing or diminishing the strength of the spring; 3d,
by serving as a button to secure the under strap; the leather covering conceals
the plate, and yet gives a free motion to the pad, and the plate is connected
with the circumference spring by a small cord E; which prevents the pad from
expanding too far.
AND BE IT REMEMBERED, that on the same Twenty-seventh day of
June, in the year above mentioned, tl aforesaid Thomas Bartlett came
before our Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained, in form above written:
And also the Specification aforesaid was stamped according to the tenor of
the Statute in that
.
1