Improvements in Artificial Teeth.
Year: 1890

page_text: Date of Application, 26th Apr., 1890
Co¨plete Specification Left, 24th Jan., 1891-Accepted, 28th Feb., 13-1
PROVISIONAL SPECIFICATION.
Improvements in Artificial Teeth.
I, ARTHUR EDWARD Asit, of 141 Maida Vale, in the County of Middlesex,
Dental Manfacturer, do hereby declare the nature of this invention to be as
follows.
At the present time artificial teeth are formed of porcelain with a pin or pins of
platinum wire projecting out from them at the back-and these wire pins have
hitherto been made of platinum as they have to be embedded in the material from
which the tooth is moulded before it is baked or fired and the wire has to be
capable of withstanding the heat to which the tooth has to be subjected.
The object of this invention is to enable the pins to be formed of other wire than
platinum. I effect this by embedding in the material of which the tooth is formed
a short length of a tube or tubes of platinum which may be flanged at the inner
end. After the tooth has been fired a pin of metal headed or otherwise of the
required length is inserted into each tube and firmly fixed by soldering or other
means. In this way comparatively little platinum has to be used in the manu-
facture of artificial teeth and the pins can be made of less expensive metal.
Dated this 26th day of April 1890.
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Artificial Teeth.
I, ARTHUR EDWARD ASH, of 141, Maida Vale, in the County of Middlesex,
Dental Manufacturer, 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 :-
At the present time artificial teeth are formed of porcelain with a pin or pins of
platinum wire projecting out from them at the back-and these wire pins have
hitherto been made of platinum as they have to be embedded in the material from
which the tooth is moulded before it is baked or fired and the wire has to be
capable of withstanding the heat to which the tooth has to be subjected.
The object of this invention is to enable the pins to be formed of other wire than
platinum effect this by embedding in the material of which the tooth is formed a
short length of a tube or tubes of platinum which may be flanged at the inner end.
After the tooth has been fired a pin of metal headed or otherwise of the required
length is inserted into each tube and firmly fixed by soldering or other means.
this way comparatively little platinum has to be used in the manufacture of artificial
teeth as the pins can be made of a less expensive metal.
In
The drawing annexed shews two views of an artificial tooth having two platinum
tubes embedded in it as above described.
To form the tooth with a tube or tubes of platinum embedded in it the mould in
which the tooth is to be made is formed with a pin or pins projecting into it upon
which the tube or tubes are placed before commencing to fill the mould with the
composition of which the tooth is to be formed. The pin or pins I arrange to be
carried by a removable brass bar forming part of the mould so that when the mould
has been filled with composition the bar and pin or pins carried by it may be with-
drawn from the mould leaving the platinum tube or tubes embedded in the com-
position the pins having held the tubes correctly in position whilst the mould was
being filled and having prevented the composition from filling them up.

page_text: Subsequently the firing of the teeth is proceeded with in the ordinary way.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
Artificial teeth with short tubes of platinum embedded in them and with pins
of other metal soldered or otherwise secured into the tubes after the teeth have
been fired.
ARTHUR E. ASH.