Certain Improvements Connected with Artificial Teeth, so as to Secure more Perfect Fitting.
Year: 1886

page_text: Date of Application, 30th Apr., 1886.
Complete Left, 29th Jan., 1887.
Complete Accepted, 15th Apr., 1887.
PROVISIONAL SPECIFICATION.
Certain Improvements Connected with Artificial Teeth, so as to
Secure more Perfect Fitting.
I, THOMAS ROBERTSHAW of Horton Street, Halifax, Yorkshire Surgeon Dentist,
do hereby declare the nature of this invention to be as follows:―
The object of my invention is to devise certain means or methods for the purpose of
more effectually securing artificial teeth to the roof of the mouth, and thereby prevent
them falling or becoming displaced against the wishes of the wearer.
According to my invention I form a suitably sized chamber in the mount or artificial
roof supporting the teeth. The floor of this chamber is composed of a solid ring of
soft or flexible vulcanite but formed in such a manner that the centre or body thereof
is of hard vulcanite rendering the ring capable of being elevated by the tip of the
tongue, or by the finger so as to drive out the air from the chamber above, forming
thereby almost a complete vacuum, by which means the piece is securely held to the
roof of the mouth.
This method of securing artificial teeth in the mouth dispenses with the use of
springs, wires, and other devices hitherto employed for that purpose.
Dated this 28th day of Anril 1886
TASKER & CROSSLEY,
Commercial Street, Halifax,
Agents.

page_text: Secure more Feriect FILL.
I THOMAS ROBERTSHAW, of Horton Street, Halifax Yorkshire Surgeon 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 object of my invention is to devise certain means or methods for the purpose of
more effectually securing artificial teeth to the roof of the mouth, and thereby prevent
them falling or becoming displaced against the wishes of the wearer.
According to my invention I form a suitably sized chamber in the mount or artificial
roof supporting the teeth. The floor of this chamber is composed of a solid ring of
soft or flexible vulcanite but formed in such a manner that the centre or body thereof
is of hard vulcanite rendering the ring capable of being elevated by the tip of the
tongue or by the finger so as to drive out the air from the chamber above forming
thereby an almost complete vacuum by which means the piece is securily held to the
roof of the mouth.
Such being the nature and object of my invention, I will make reference to the
accompanying sheet of drawings illustrative thereof, wherein Fig. 1 is plan view of
the mount or artificial roof a made from vulcanite or other suitable material, to which
the teeth are attached in the ordinary manner. In the artificial roof a I form a recess
or chamber in which is placed a hard ring c being connected to the roof a by a soft
flexible ring d in such a manner that when pressure is placed upon the hard ring c
the soft ring d will yield or give way, allowing the ring c to be elevated for purposes
hereinafter explained.
Fig. 2 is cross section taken through the line e- in Fig. 1.
The modus operandi is as follows
In placing the artificial roof a upon the roof of the mouth, the tip of the tongue is
placed upon the ring c, so as to elevate it and eject the air from the chamber b forming
thereby a vacuum sufficient for the purpose of keeping the artificial roof in position.
In Fig. 3 I have shewn the application of a flexible disc y connected to the ring c by
a riyet or other means, which will come into contact with the roof of the mouth and
stick or adhere thereto so as to keep the artificial roof in position.
This method of securing artificial teeth in the mouth dispenses with the use of
springs, wires, and other devices hitherto employed for that purpose.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed I declare that what I claim is :-
The combination of disc c with roof a connected thereto by a yielding substance
corresponding to d, arranged and combined in the manner and for purposes substantially
as set forth.
Dated this 28th lay of January 1887.
TASKER & UHUDDLE,
Halifax, Agents.