Improvements in Dentists' Palate Mould Trays.
Year: 1890

page_text: Date of Application, 9th Aug., 1890
Complete Specification Left, 7th May, 1891-Accepted, 25th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Dentists' Palate Mould Trays.
I ALFRED CHARLES FARNSWORTH L.D.S.I. of 96 Oxford Street Manchester
in the County of Lancaster Dentist do hereby declare the nature of this invention
to be as follows:-
My said invention relates to the trays which are used by dentists to contain the
plastic substance or mould by means of which impressions are taken of the palate
or other parts of the patient's mouth in fitting and supplying artificial teeth. The
said plastic substance or mould as usually employed is hot when placed in the
patient's mouth and has to be pressed against and maintained in contact with the
palate or other part of the inouth until the substance has set, so as to retain
permanently the shape. This necessary and prolonged maintenance of the hot
mould in contact with the interior of the mouth is trying to a patient and even in
some cases productive of suffering.
The object of my invention is to minimise this inconvenience and shorten the
trying period by rapidly cooling the tray and the contained mould as soon as the
mould as been pressed to the shape of the mouth. This object I effect by making
the mould tray hollow and causing a stream of cold water or other cooling liquid
to circulate or flow through the tray thus quickly lowering the temperature of both
tray and mould and not only obviating discomfort to the patient while the mould is
in the mouth but also enabling the operator to remove it more quickly as the mould
sets more rapidly. My invention may be carried into practical effect in several
ways. The most obvious is to make the mould tray hollow so that the cooling
liquid shall flow uninterruptedly through it or through a space extending around it
or I might attach circulating tubes or spaces or conduits corresponding to the
description or shape of the tray. The water or other cooling liquid is under the
control of the operator one tube leading from a supply under pressure or from a
pump to the influx to the mould tray and another tube conducting the liquid from
the efflux to a suitable receptacle. The tap, valve or other means for admitting or
cutting off the cooling current might be placed in the handle of the tray and might
assume the form of a spring or other knob by pressing upon which with the thumb
the operator could readily stop or start the cooling current and without having his
attentic diverted from the patient.
Dated this 8th day of August 1890
ON & FULTON,
1, St. James Square, Manchester, Agents.
COMPLETE SPECIFICATION.
In provements in Dentists' Palate Mould Trays.
I ALFRED CHARLES FARNSWORTH L.D.S.I. of 96 Oxford Street Manchester
in the County of Lancaster 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 and accompanying drawings:-
My said invention relates to the trays which are used by dentists to contain the
plastic substance or mould by means of which impressions are taken of the palate
or other parts of the patient's mouth in fitting and supplying artificial teeth. The
said plastic substance or mould as usually employed is hot when placed in the
patient's mouth and has to be pressed against and maintained in contact with the
palate or other part of the mouth until the substance has set so as to retain

page_text: permanently the shape. The necessary and prolonged maintenance of the hot
mould in contact with the interior of the mouth is trying to a patient and even in
some cases productive of suffering.
The object of my invention is to minimise this inconvenience and shorten the
trying period by rapidly cooling the tray and the contained mould as soon as the
mould has been pressed to the shape of the mouth. This object I effect by making
the mould tray hollow and causing a stream of cold water or other cooling liquid
to circulate or flow through the tray thus quickly lowering the temperature of both
tray and mould and not only obviating discomfort to the patient while the mould is
in the mouth but also enabling the operator to remove it more quickly as the mould
sets more rapidly.
The mode of carrying my invention into practical effect will be more easily
understood by reference to the accompanying sheet of drawings.
Fig. 1 is a perspective view of a palate mould tray made in accordance with my
invention.
Fig. 2 is a longitudinal section of the tray at the line A. B. Fig. 1.
The palate mould tray a is made hollow as clearly shown by the sectional view
Fig. 2. To the front of the tray I connect two tubes and which are for the
purpose of circulating the cooling fluid through the hollow tray. The two pipes
and the connecting web d form a convenient handle to the tray. The cold water
or other cooling fluid is forced or allowed to flow into the tray through the tube b
and is led away by the tube c or vice versa. The tray with the contained hot mould
is thus rapidly cooled. It will be evident that instead of having the interior of the
tray consisting of one cavity as shown I might have circulating tubes or spaces or
divisions to break up and guide the cooling current.
The ends of the pipes and care fitted with flexible tubes for conducting
the water to and from the tray. The water or other cooling fluid is under the
control of the operator, one tube, say for example the tube e, leading from a supply
under pressure or from a pump; and the other, say the tube el conducting the liquid
from the efflux to a suitable receptacle. The tap, valve or other means for
admitting or cutting off the cooling current might be placed in the handle of the
tray and might assume the form of a spring or other knob by pressing upon which
with the thumb the operator could readily cut off or admit the cooling current
without having his attention diverted from the patient.
Having now particularly described and ascertained the nai
invention and in what manner the same is to be performed 1 d
] claim is :-
=;
re of my said
lare that what
ing circulating
A palate mould tray made hollow or having chambers or contai
pipes so as to permit of the passage of a current of cooling fluid for the
purpose of more rapidly cooling the mould in the tray substantia y as described
and shown.
Dated this 6th day of Mov 1801
DUTTON & FULTON.
1, St. James Square, Mauche. er, Agents.