AN INSTRUMENT TO BE USED IN SURGICAL OPERATIONS, CALLED. A. TOURNIQUET, FOR THE PURPOSE OP MORE EFFECTUALLY THAN HAS HITHERTO, BEEN DONE THE HINDERING STOPPING OF EFFUSION OF BLOOD IN CASES OF.GUN-SHOT, AND OTHER BAD WOUNDS AND FRACTURES AFFECTING OR BEFALLING THE LIMBS: OF THE HUMAN BODY
Year: 1800

page_text: TO. ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HORATIO SAVIGNY; of King Street; in the Parish of Saint Paul, Covent Garden;
in the County of Middlesex, Surgeons' Instrument Maker; send 'grecting....
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent. under the Great Seal of Great Britain, béaring date
the Thirty-first, day of. March, in the fortieth year of His reign; give and
grant unto me, the said John Horatio. Savigny,. His especial licence that I I;
the said John Horatio Savigny, during the term of: years therein expressed;
should and Jawfully, might use, exercise, and vend, within England, Wales;
and the Town of Berwick-upon-Tweed, my. Invention of "AN INSTRUMENT
TO BE USED IN SURGICAL OPERATIONS, CALLED. A. TOURNIQUET, FOR THE PURPOSE
OP MORE EFFECTUALLY THAN HAS HITHERTO, BEEN DONE THE HINDERING
STOPPING OF EFFUSION OF BLOOD IN CASES OF.GUN-SHOT, AND OTHER BAD WOUNDS
AND FRACTURES AFFECTING OR BEFALLING THE LIMBS: OF THE HUMAN BODY;" in
which said Letters, Patent there is. contained a proviso, obliging me; the said
John Horatio Savigny, under my hand and seal, to cause a particular descrip-
tion of the nature of my said Invention, and.how the same is to be performed,
to be inrolled, in. His Majesty's High. Court of Chancery within one calendar
month next after the date of the said recited Letters Patent, as in' and by
the, same,, relation being thereunto, bad, may more fully and at large appear.
NOW KNOW YE; that in obedience to the said Letters Patent, and to the
aforesaid proviso, or condition therein contained, I, the said John Horatio*

page_text: Savigny, do by these Presents particularly describe and ascertain the nature of
the said Invention, hereby referring to the Drawing accompanying and
annexed to these Presents, and which I explain as follows:-
Figure. 1. (a) the upper plate of the instrument, made of brass, the sides,
turned downwards to give it strength, and to form a frame for the roller (e).
Between the extremity (d) and the screw is an opening for the bandage to
pass through, in order to its being strongly sewed and secured upon (d), whose
edges are rendered perfectly round and smooth to prevent their cutting
through the bandage. (b) a steel screw, passing through a projection in the
centre of the upper plate (a), and fixed by a rivet upon a collar in a counter-
sink on the inferior part of (c), so as to render it perfectly secure and yet to
allow it a free rotatory motion; (c, c), the lower plate, of brass, strengthened in
its centre to receive the inferior part of the screw (b), and to form a resistance
to its action; (d) one extremity of the upper plate round which the fixed end
of the bandage is secured; (e), a roller over which the bandage is easily drawn
to any degree of stricture; (f), three strong sharp points of steel screwed
into the other extremity of the upper plate to receive and secure the bandage;
when it has been extended over the roller to the desired effect; these points are
very slightly curved upwards that they move securely, retain the bandage
when at its utmost extent of stricture, and more easily disengage it when the
instrument is to be removed.
Figure 2 represents the instrument of its full size, mounted, with its
bandage passed over the rollers, and though of a very contracted length, sufficient
to explain the nature of its action and effects; this bandage is at least one yard
in length, and on its free extremity is revitted a small triangular piece of thin
plated metal, which by giving it a proper fixed curve will enable it, on
application of the instrument, to pass more readily through the opening in the
upper plate between the roller and the screw.
Figure 3, a compress of cork, covered with leather, having on its flat
surface at each extremity a loop sewed across, by which it is always retained
in a longitudinal position upon the bandage, and slides upon it till fixed at any
desired point. N.B.-This compress is not always necessary, as the bandage.
by the power of the instrument, is of itself sufficient to stop sudden hæmorr-
-hages from-violent-wounds-till-chirurgical--assistance-can-be- obtained. In
operations indeed it is indispensable, as making a more forcible and immediate
compression upon the artery. The construction of the instrument as to its
use is so self-evident that very very little instruction is necessary in this
particular. When the bandage is applied round the limb, it is to be passed
through the opening behind the roller, drawn over it as tight as possible, and