CERTAIN IMPROVEMENTS IN THE PLATES OR PIECES FOR THE ROOF AND GUMS OF THE MOUTH. FOR ATTACHING THERETO ARTIFICIAL TEETH
Year: 1846

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HENRY MOGGRIDGE, of No. 13; Old Burlington Street, in the County of
Middlesex, Dentist, send greeting.
WHEREAS Her present most Excellent Majesty, by Her Letters Patent
under the Great Seal of Great Britain, bearing date at Westminster, the
Thirty-first day of March, in the ninth year of Her reign, did give and grant
unto me, the said William Henry Moggridge, my exors, admors, and assigns,
Her said Majesty's especial licence, full power, sole privilege and authority,
that I, the said William Henry Moggridge, my exors, admors, and assigns,
or such others as I; the said William Henry Moggridge, my exors, admors,
or assigns, should at any time agree with; and no others, from time to
time and at all times thereafter during the term of years therein mentioned,
should and lawfully might inake, use, exercise, and vend, within that part of
the United Kingdom of Great Britain and Ireland called England, Her
Dominion of Wales, and Town of Berwick-upon-Tweed, and also in the
Islands of Jersey, Guernsey, Alderney, Sark, and Man, and in all Her
Colonies and Plantations abroad, my Invention of "CERTAIN IMPROVEMENTS
IN THE PLATES OR PIECES FOR THE ROOF AND GUMS OF THE MOUTH. FOR ATTACHING
THERETO ARTIFICIAL TEETH;". in: which said Letters Patent there is contained
a proviso requiring that I, the said William Henry Moggridge, shall parti-
cularly describe and ascertain the nature of my said Invention, and in what
manner the same is to be performed, by an instrument in writing under my
.

page_text: hand and seal, and cause the same to be enrolled in Her said Majesty s
High Court of Chancery within six calendar months next and immediately
after the date of the said in part recited Letters Patent, as, reference being
thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
William Henry Moggridge, do hereby declare that the nature of my said
Invention, and the manner in which the same is to be performed, are parti-
cularly described and ascertained in and by this present Instrument in writing,
reference being had to the Drawings hereunto annexed, and in which said
several Drawings similar parts are marked and referred to by similar letters
or figures (that is to say) :-
My said Invention consists,―
Firstly, of an improvement in the shape or form of the plates or pieces of
metal or other suitable material, to be fitted to the roof or gums of the mouth
for attaching thereto artificial teeth; and secondly, of an improved mode of
taking casts of the roof or gums of the mouth for the purpose of fitting
thereto such plates
pieces as aforesaid.
Or
And firstly, my improvement in the form or shape of plates or pieces for
carrying artificial teeth consists in constructing such plates or pieces of such
form or shape that the surfaces of the plates or pieces which are to come in
contact with the roof or gums of the mouth shall press more strongly upon the
roof or gums at or near to the edges of such pieces than in the centre or
middle parts of such surfaces, so that, when the roof or gums come in contact
with and are pressed upon such surfaces, the air may be excluded and the
pressure of the atmosphere may cause the plates or pieces which carry arti-
ficial teeth to adhere more firmly to the roof or gums. In order to do this, if
the plate or piece is intended to fit the roof of the mouth, the centre or
middle part of the surface which is to come in contact with the roof must be
made to project rather less than the opposite hollow in the roof of the mouth
recedes, and thus when the plate or piece is pressed upon the soft roof the air
will be excluded and the pressure of the atmosphere upon the plate or piece
will cause it to adhere, and the close contact of the plate or piece at the edges
will prevent the intrusion of the air. So, if the plate or piece is intended to
fit the gums, the centre or middle part of the surface which is to come in
contact with the gums must be made somewhat deeper than the projecting
parts of the gums which are to come in contact with such surface; by which
means the same result will be produced and the plate be caused to adhere more
firmly to the gums. To the plates thus constructed the teeth are to be
rivetted or fixed in the usual way, or the teeth and piece (when a metal plate

page_text: 66
is not used) may be made all in one if thought more desirable. In the
Drawings hereunto annexed I have shewn figures of plates or pieces con-
structed according to this part of my Invention. Figure 1 is a front elevation
of a set of artificial teeth (for the upper jaw) fitted to or formed upon a
piece" of suitable composition or material for carrying the same, which is
constructed according to the shape or form above referred to. Figure 2 is a'
side or profile view thereof. Figure 3 a vertical section through the line Z, Z,
of Figure 4, which represents a plan view of Figures 1 and 2, seen from the
upper or that side marked Y in those Figures. Figure 5 is a front elevation
of a set of artificial teeth (for, the upper jaw) fitted into.or upon a metallic
plate for carrying the same, which is constructed according to the shape or form
above referred to. Figure 6 is a side or profile view thereof. Figure 7 is a
vertical section through the line Z, Z, of Figure 8, which represents a plan
view of Figures 5 and 6, seen from the side marked Y in those Figures. A
marks the teeth, and B the wire for securing or attaching them to the metal
plate or piece of suitable composition or material marked C, D, the shape or
form of which constitutes the improvement intended in this first division of
my Invention; such plate or piece being made to press more closely against
the or gums of the mouth at the edges C than at the centre or middle
portion D. It is to be observed, that in making any plate or piece intended for.
the roof of the mouth care must be taken that the plate or piece does not
extend so far backwards as to interfere in any way with the curtain of the palate.
And secondly, my improved mode of taking casts of the roof or gums
of the mouth, for the purpose of fitting thereto such plates or pieces as afore-
said, consists in admitting air between the surface of a wax mould and the
roof or gums of the mouth to which such wax mould may have been applied
for making a cast thereof, so that the pressure of the mould by the atmosphere.
to the roof or gums may be overcome and the mould removed without bending,
twisting, or distorting it. For this purpose I make holes in the usual plates or
frames for holding the wax intended to be applied to the roof or gums in
such a position that holes communicating with the atmosphere may be
made through the wax to the surface of the roof or gums in contact there-
with; and, when the wax has been applied to the roof or gums, I then
take a piece of wire or any suitable instrument (made blunt, so as not to
injure the mouth) and push it through the holes in the plate or frame,
and through the wax to the surface of the roof or gums, so as to let the
air in between the mould and the roof or gums. Some of the ordinary
plates or frames used for the purpose of making wax moulds are shewn in the
Drawings hereunto annexed.
In Figures 9, 10, 10, 12, 13, 14, are shewn the

page_text: modes in which I perforate such plates or frames. Figure 9 is a side elevation
or profile view of one of these plates or frames (having holes formed therein
as above described). Figure 10, an end view, seen from the end marked X
in Figure 9. Figure 11, a plan view seen from the upper or that side
marked W in Figure 9. Figures 12, 13, and 14, are views of another plate
or frame (having holes formed therein as before stated), and correspond
respectively to the views represented at Figures .9, 10, and 11, as above
described. In all these Figures M marks the plate or frame for holding the
wax which is to form by pressure against the mouth a mould or matrix of
corresponding form. N marks the holes referred to in the foregoing descrip-
tion, and O the handle of the instrument.
Having now described the nature of my said Invention, and the manner in
which the same is to be performed, I claim,―
Firstly, the construction of the plates or pieces of the shape or form herein-
before described, whereby the pressure of the atmosphere may be made to
cause such plates or pieces to adhere more effectually to the roof or gums of
the mouth. And,
Secondly, I claim the improved mode of taking casts of the roof or
gums of the mouth, for the purpose of more accurately fitting thereto such
plates or pieces as aforesaid in manner herein-before described.
In witness whereof, I, the said William Henry Moggridge, have hereunto
.set my hand and seal, this. Thirtieth day of September, in the year of
our Lord One thousand eight hundred and forty-six.
W. HENRY (L.S.) .MOGGRIDGE.
AND BE IT REMEMBERED, that on the Thirtieth day of September, in
the year of our Lord 1846, the aforesaid William Henry Moggridge came
before
our said Lady the Queen in Her Chancery, and acknowledged the
Specification aforesaid, and all and every thing therein contained and specified,
in form above written. And also the Specification aforesaid was stamped
according to the tenor of the Statute made for that purpose.
Enrolled the Thirtieth day of September, in the year of our Lord One
thousand eight hundred and forty-six.