Improvements in the Connection of the Upper and Lower Sets of Artificial Teeth.
Year: 1886

page_text: Date of Application, 15th Apr., 1886.
Complete Left, 8th Jan., 1887.
Complete Accepted, 5th Apr., 1887.
PROVISIONAL SPECIFICATION.
Improvements in the Connection of the Upper and Lower Sets of
Artificial Teeth.
I, FRIEDRICH ROETTER of Ausbach in the Empire of Germany, dentist, do hereby
declare the nature of this invention to be as follows:-
The object of this invention is an improvement in the manner of connecting the
upper and lower jaws or plates in artificial sets of teeth.
The springs hitherto employed for this purpose are generally bow-shaped springs
fixed to the outside of the plate or jaw holding the teeth and thereby frequently
inflame or irritate the interior of the mouth. Also owing to the mode of action of the
springs, the underpart of the artificial jaws is unequally pressed to the mouth.
In my improved connection I use a helical spring, the ends of which are fixed in a
recess or bore, situate at the ends of the jaws in a line with the teeth in each of the
plates. The depths of these recesses is such as to admit of the two plates being
approached so as to touch each other.
By the use of my method of fixing a helical spring for the connection of the jaws,
no irritation of the membranes is possible, as any friction with the latter is avoided by
the spring being enclosed in the substance of the plates.
"
A

page_text: COMPLETE SPECIFICATION.
Improvements in the Connection of the Upper and Lower Sets of
Artificial Teeth.
I, FRIEDRICH ROETTER, of Ansbach in the Empire of Germany, dentist, 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
statement:
The present invention relates to the manner of connecting together the upper and
lower jaws of artificial sets of teeth. The springs hitherto employed are bow-shaped
springs, fixed to the outside of the plates or jaws holding the teetli, and for this reason
frequently inflame or irritate the mucous membrane of the mouth. Also owing to the
mode of action and arrangement of these springs, they also act unilaterally, and the
plates or jaws are unequally pressed to the mouth.
The accompanying drawings show my improvement. Fig. 1 is a sectional front
view and Fig. 2 a side view of the jaws open. Fig. 3 is a sectional rear view and
Fig. 4 a sectional side view of the same closed. Fig. 5 is a plan of the upper plate
and Fig. 6 an underview of the lower plate. I make use of two helical springs A
situated at the ends of the jaws; the ends of these springs are arranged in corre-
sponding recesses or cavities in such a manner, that, when the teeth are closed, the
springs are entirely enclosed in said cavities and injury or irritation to the month is
prevented. By use of these springs, the artificial jaws open in a similar manner to
natural jaws and press evenly on the latter.
Having now particularly described and ascertained the nature of this invention, and
in what manner the same is to be performed, I declare that what I claim is :
For connecting the upper and lower plates, jaws or sets of artificial teeth.
The combination of the helical springs A with the cavities B arranged in the said
plates or jaws and containing said springs, substantially as and for the purpose set.
forth.
T: oil.
. 1007