Improvements in the Manufacture or Production of a New Compound for Surgical Sheets, Splints, Jackets, and the like.
Year: 1893

page_text: Date of App ication, 14th June, 1893
Complete Specification Left, 9th Mar., 1894-Accepted. 21st Apr. 1894
Improvements in the Manufacture or Production of a New Compound
for Surgical Sheets, Splints, Jackets, and the like.
We, ANTHONY FRANCIS EMERIC DE ST. DALMAS, WILLIAM HENRY
EMERIC DE ST. DALMAS and ALFRED FOSTER CHOLERTON, all of 40 Belgrave:
Gate, in the City and County of Leicester, Medical Plaster Manufacturers
(trading together under the style of A. de St. Dalmas & Co.) do hereby declare
the nature of this invention to be as follows:-
:~
This our invention relates to improvements in the manufacture or production of
a new.compound for surgical sheets, splints, jackets and the like; and our inven-"
tion consists in the novel combination of materials and compounds for the said
purposes hereinafter described.
Hitherto it has always been customary to prepare plaster of Paris bandages at
the time they were required for use, surgeons and nurses having the trouble of
mixing and spreading immediately the requisite quantity of plaster of Paris.,
Until skill has been acquired in the preparation and application the bandages often
Bandages have been sold which had a dressing
fail to set and are therefore useless.
of dry plaster of Paris on the materials. They have saved the surgeon or nurse
some time and trouble, but owing to their liability to become useless if exposed to,
atmospheric moisture inconvenience and frequent loss is the result of this process;
and the bandages so made are unsatisfactory in use owing to the dry plaster of
Paris being merely pressed upon and becoming easily detached from the fabric or,
backing.
Our invention obviates these inconveniences and a bandage ready prepared,
cleanly and satisfactory in use and not affected by atmospheric moisture can be
The invention is applicable to preparations of
always at hand for the surgeon.
plaster of Paris for surgical uses.
By our process we make bandages, sheets, jackets splints, &c. with various
materials as a backing, for example, crinoline, calico, flannel, felt, paper, gauze or
any suitable material ready for use after moistening..
incorporated in the said material
We prepare a compound to be spread upon or
such compound
used as a backing, by the aid of suitable appliances or machinery,
being for example,"
}
Plaster of Paris
Gelatine
Acetic acid"
Water
20 ounces
11
"
2
-"
18
"
5 but we do not confine ourselves to the proportions named nor to these ingredients
which may be varied according to the circumstances. Other substances may be
for the
compounded with the plaster of Paris either alone or in combination for
purposes of our invention, such as, for example, glue, gelatine, isinglass, india-
rubber,,dextrine, resin, gum, glucose, shellac, starch, flour of any kind &c. It may
O also, be found preferable in some cases, to use naphtha as a solvent.
..Dated this 14th day of June 1893.
"
:
***
AAS NGHORN & SON,

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture or Production of a New Compound
for Surgical Sheets, Splints, Jackets, and the like.
We, ANTHONY FRANCIS EMERIC DE ST. DALMAS, WILLIAM HENRY
EMERIC DE ST. DALMAS, and ALFRED FOSTER CHOLERTON, all of 40 Belgrave
Gate, in the City and County of Leicester, Medical Plaster Manufacturers
(trading together under the style of A. de St. Dalmas & Co.) do hereby declare
the nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following stateinent :-
This our invention relates to the manufacture of a new compound for surgical
sheets, splints, jackets and the like; and our invention consists in the novel
combination of materials and compounds for the said purposes hereinafter
described.
Hitherto it has always been customary to prepare plaster of Paris bandages at
the time they were required for use, surgeons and nurses having the trouble of
mixing and spreading immediately the requisite quantity of plaster of Paris.
Until skill has been acquired in the preparation and application, the bandages often
fail to set and are therefore useless. Bandages have been sold which had a dressing
of dry plaster of Paris on the material. They have saved the surgeon or nurse
some time and trouble, but owing to their liability to become useless if exposed to
atmospheric moisture, inconvenience and frequent loss are the results of this
process; and the bandages so made are unsatisfactory in use owing to the dry
plaster of Paris being merely pressed upon and becoming easily detached from the
fabric or backing.
с
Our invention obviates these inconveniences and a bandage readily prepared,
cleanly and satisfactory in use, and not affected by atmospheric moisture, can
always be at hand for the surgeon. The invention is applicable to preparations of
plaster of Paris for surgical purposes.
By our process we make bandages, sheets, jackets, splints &c. with various
materials as a backing, for example, crinoline, calico, flannel, felt, paper, gauze, or
any suitable material ready for use after moistening.
We prepare a compound to be spread upon or incorporated in the said material
used as a backing, by the aid of usual and well known appliances or machinery,
such compound having a sufficient proportion of plaster of Paris as one of its
component parts. Said plaster of Paris is mixed or compounded with gelatine,
acetic acid and water in about the following proportions, viz. :--
These form a compound for surgical sheets, splints jackets or the like, which,
when required to be used, need only to be immersed in water or other suitable
solvent.
We do not confine ourselves to the exact proportions of the ingredients given in
the above example, as these depend entirely upon the quality of the plaster of
Paris, the strength of the acetic acid and the kind of gelatine used, and owing to
the varying strength and quality of these ingredients it is impossible to more than
indicate the approximate proportions necessary. Nor do we confine ourselves to
the whole of the ingredients stated, which, with the exception of plaster of Paris,
may be varied according to circumstances, or other ingredients may be compounded
with the plaster of Paris either alone or in combination, such as for example, glue,
gelatine, isinglass, resin, gum, dextrine, glucose, india-rubber, starch, shellac,

page_text: farinaceous flour and other ingredients which may be rendered gelatinous or plastic
by means of a solvent. It may be found preferable in some cases to use naphtha
as a solvent.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. A compound for surgical sheets, splints, jackets and the like, adapted to be
spread upon or incorporated in any suitable backing, and consisting of plaster of
Paris in combination with gelatine, acetic acid and water, substantially in the
proportions and for the purposes herein before described.
2. A compound for surgical sheets, splints, jackets and the like, adapted to be
spread upon or incorporated in any suitable backing and consisting of plaster oi
Paris in combination with a solvent and any ingredients which may be rendered
gelatinous and plastic by such solvent, substantially as and for the purposes
hereinbefore described.
Dated this 9th das of March 1894.
HORN & SUN,
Applicants' Agents..