Improvements in Artificial Teeth.
Year: 1890

page_text: Date of Application, 8th Aug., 1890
Complete Specification Left, 8th May, 1891-Accepted, 13th June. 1891
PROVISIONAL
SPECIFICATION.
Improvements in Artificial Teeth.
I, CASSIUS MONTEZUMA RICHMOND, of 10 Park Square West, Regents Park,
in the County of Middlesex, Dental Surgeon, do hereby declare the nature of this
invention to be as follows:-
The object of my invention is to effect improvements in the construction of
artificial tooth crowns, intended for attachment to natural roots.
My improved tooth crown is formed of porcelain in the usual way, and has a
platinum tube moulded and baked into it.
This tube is provided with an internal screw thread, so that a metal pin can be
screwed and cemented into it after the tooth has been baked. The projecting part
of the said pin is cemented into a hole formed in the natural root, to fix the crown
thereon, in the ordinary manner.
According to the usual method of construction a pin is moulded into and baked
with the crown, necessitating the employment of a platinum pin and thus adding
considerably to the cost of the tooth; but my invention enables the cost of such
artificial crowns to be materially reduced, for as the pin is not baked in with
the crown, the said pin may be formed of steel, brass, nickel or other suitable cheap
metal, while at the same time the security of attachment is equal to the old method,
with the additional advantage that a broken or injured pin can readily be replaced
by a new one at any time.
Dated this 8th day of August 1890.
AMBROSE MYALL,
21, Cockspur Street, London, S. W., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Artificial Teeth.
I, CASSIUS MONTEZUMA RICHMOND of 10 Park Square West Regents Park in
the County of Middlesex, Dental Surgeon, 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 effect improvements in the construction of
artificial tooth crowns, intended for attachment to natural roots.
My improved tooth crown is formed of porcelain in the usual way, and has a
platinum tube moulded and baked into it.
This tube is provided with an internal screw thread, so that a metal pin can be
screwed and cemented into it after the tooth has been baked. The projecting part
of the said pin is cemented into a hole formed in the natural root, to fix the crown
thereon, in the ordinary manner.
According to the usual method of construction a pin is moulded into and baked
with the crown, necessitating the employment of a platinum pin and thus adding
considerably to the cost of the tooth, but my invention enables the cost of such
artificial crowns to be materially reduced, for as the pin is not baked in with the
crown, the said pin may be formed of steel, brass, nickel or other suitable cheap
metal, while at the same time the security of attachment is equal to the old method,
with the additional advantage that a broken or injured pin can readily be replaced
by a new one at any time.
In order that my said invention may be fully understood and readily into effect
I will proceed to describe the drawing hereunto annexed.

page_text: DESCRIPTION OF THE DRAWING.
The drawing represents to a scale of about twice the actual linear dimensions a
vertical section of an artificial tooth made in accordance with my invention.
It is a tooth intended to be attached to a natural root by means of a screw pin
which passes from the under side of the artificial crown downwards into the root;
it is to teeth of this class and to no other that my invention applies.
t
a is the porcelain body of the tooth, is a platinum tube and is a screwed pin
of a suitable inexpensive metal. The platinum tube is inserted when the porcelain
is moulded and is baked with it; the pin c is inserted afterwards.
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
An artificial tooth of porcelain with a platinum tube embedded in it open on
the underside of the tooth; and a screw pin fixed in this tube so as to project
downwards suitably to form a connection between the tooth and a natural root.
Dated this 8th day of May 1891
CARPMAEL & Co.,
Agents for the Applicant.