IMPROVEMENTS IN SETTINGS FOR ARTIFICIAL TEETH
Year: 1880

page_text: LETTERS PATENT to Peter Jensen, of 33, Chancery Lane, in the County of
Middlesex, for an Invention of "IMPROVEMENTS IN SETTINGS FOR ARTIFICIAL
TEETH." A communication from abroad by Etienne Rauzerot, also called
Stephane, of Paris, France, Surgeon Dentist.
PROVISIONAL SPECIFICATION left by the said Peter Jensen at the Office
of the Commissioners of Patents on the 3rd September 1880.
" IMPROVE-
PETER JENSEN, of 33, Chancery Lane, in the County of Middlesex.
MENTS IN SETTINGS FOR ARTIFICIAL TEETH." (A. communication from abroad by
Etienne Rauzerot, also called Stephane, of Paris, France, Surgeon Dentist.)
According to the old system the teeth are fixed to a frame, which may be made
of india rubber, celluloid, or other suitable material, and is lined with a covering or
shield, which may be made, say, of gold or platinum. It is to be noticed that this
covering or shield is made of a solid plate rather difficult to execute, because the
frame having to reproduce the undulations from which a cast has been taken on
the subject to be fitted with it, it is necessary that the covering or shield should be
made exactly to fit the undulations, which presents' great difficulties, seldom over-
come successfully even by clever practitioners; hence supposing that the cast is
perfect the covering or shield cannot reproduce them all perfectly, and thus it is
very uncomfortable for the person for whom it is intended; besides, this. covering
or shield being made of a solid plate which cannot reproduce all the undulations
of the cast it fits only in some parts, and thus gives a different result to that
intended, and if any strain is produced one of the two must give way and frequent
breakages follow,
With this Invention it is quite different. Instead of using a solid or plain plate
to make the cover or shield an openworked plate is used. It is formed with per-
forations, and the partitions are bent or curved in the form of an arc in order to
obtain lightness and strength. The partitions being narrow they more readily
take into the sinuosity of the cast.
Another great advantage is, that the framing will fit more conveniently into the
covering or shield, and will form a kind of setting round each aperture. Additional

page_text: lightness and strength are thus obtained in the cover or shield, more strength in
the framing, and more satisfactory results attained both with regard to the operator
and with regard to the person it is destined for, inasmuch as the conformation
being perfect all causes of discomfort will be done away with.
Part sets or any parts of sets may be made according to this Invention, as, for
example, for forming the lower parts of a set instead of an ordinary strip of plain
plate a strip having curved mouldings may be used. By this is obtained a great
economy in the manufacture; for example, the dentist may provide himself with a
set of cutting tools according to required dimensions to cut the pieces out of the
metal plate, and with another stamping tool he forms the curvature of the partition
bars, using for the different pieces to be made tools of different sizes. By means
of pincers or any other convenient bending tool the partition bars are bent to any
required shape more perfectly than heretofore possible with full or solid plates.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Peter Jensen in the Great Seal Patent Office on the 3rd March
1881.
PETER JENSEN, of 33, Chancery Lane, in the County of Middlesex. " IMPROVE-
MENTS IN SETTINGS FOR ARTIFICIAL TEETH." (A communication from abroad
by Etienne Rauzerot, also called Stephane, of Paris, France, Surgeon Dentist.)
Many attempts have heretofore been made to overcome the numerous difficulties
which are met with in the fitting of the settings of artificial teeth, as it is not only
important that the set should be light and strong but that it at the same time
should fit well in the mouth.
The present improvements will be best understood by reference to the accom-
panying Drawings, which represent a set of teeth drawn larger than the actual
size and made according to the old system, and a set made according to these
present improvements.
Figure 1 is a plan view, and Figure 2 a cross section through A, B, of a set of
teeth according to the old system. Here the teeth a are fixed to a frame b,
which may be made of india-rubber, celluloid, or other suitable material, and is
lined with a covering or shield c, which may be made, say, of gold or platinum. It
is to be noticed that this covering or shield is made of a solid plate, rather difficult
to execute, because the frame b having to reproduce the undulations b', from which
a cast has been taken on the subject to be fitted with it, it is necessary that the
covering or shield should be made exactly to fit the undulations 6', which presents
great difficulties, seldom overcome successfully even by clever manufacturers;
hence, supposing that the cast is perfect the covering or shield cannot reproduce
them all perfectly, and thus it is very uncomfortable for the persons for whom it is
intended; besides, this covering or shield being made of a solid plate which cannot
reproduce all the undulations of the cast it fits only in some parts, and thus gives a
different result to that intended, and if any strain is produced one of the two must
give way, and frequent breakages follow.
With this Invention it is quite different. Figure 3 is a plan view, and Figure 4
a cross section through line C, D, of a set of teeth made according to this Invention.
Instead of using a solid or plain plate to make the cover or shield c an openworked
plate e is used; it is formed with perforations e², and the partitions e¹ are bent or
curved in the form of an arc, as shown in cross section, Figure 4, in order to obtain
lightness and strength; the partitions being narrow they more readily take into
the sinuosity of the cast. Another great advantage is, that the framing will fit
more conveniently into the covering or shield, and will form a kind of setting round
each aperture. Additional lightness and strength are thus obtained in the cover or
shield, more strength in the framing, and more satisfactory results attained both
with regard to the operator and with regard to the person it is destined for,
inasmuch as the conformation being perfect all causes of discomfort will be done
away with.
Although the Drawing shows a set it must be understood that part sets or any
parts of sets may be made according to this Invention, as, for example, for forming
the lower parts of a set. Instead of an ordinary strip of plain plate a strip having
curved mouldings may be used, such as is shown in Figures 5 and 6. By this is
obtained a great economy in the manufacture; for example, the dentist may
provide himself with a set of cutting tools according to required dimensions to cut
the pieces out of the metal plate, and with another stumping tool he forms the
curvature of the partition bars, using for the different pieces to be made tools of
different sizes. By means of pincers or any other convenient bending tool the

page_text: partition bars are bent to any required shape more perfectly than heretofore was
possible with full or solid plates.
And having thus described and ascertained the nature of this Invention, I
declare that I claim as the Invention communicated to me,-
First. The application of openworked plates with curved partition bars, or bars
having mouldings, for setting of artificial teeth, either for complete sets or for parts
of same, all substantially as set forth.
Second. The application of curved moulded parts of settings, for artificial teeth,
substantially as set forth.
In witness whereof, I, the said Peter Jensen, have hereunto set my hand
and seal, this Third day of March, in the year of our Lord One thousand
eight hundred and eighty-one.
PETER JENSEN. (L.S.)