IMPROVEMENTS IN DENTAL SUCTION VALVES
Year: 1887

page_text: Date of Application, 5th Mar., 1887
Complete Left, 3rd Dec., 1887
Complete Accepted, 13th Jan., 1888
CHARLES GEORGE KNIGHT, Dental Surgeon of 12 Queens Terrace, Kent Road,
Southsea, and JAMES THOMAS FORD, Engineer of 6, Outram Road Havelock Park
Southsea do hereby declare the nature of our invention for IMPROVEMENTS IN DENTAL
SUCTION VALVES to be as follows
-
The object of this invention is to provide a simple and effective Suction Valve for
supporting dentures in the mouth.
We effect our object in the following manner :-By a valve constructed to fit an
air chamber in an ordinary denture; it is formed as follows:-
The external parts consists of two saucer shaped halves, Fig. I and II respectively,
made of metal or other suitable materials. The two halves are made to fit rim
to riin.
In the centre of the lower half Fig. I, is an apature communicating with the air
chamber and at equal distance round the rim are eight lugs, B; B I, four of these
lugs B are used to secure the lower half in the denture; the remaining four BI are
for securing the upper to the lower half when placed together.
In the centre of the upper half Fig. II is an apature D, this apature is covered with
gauze, of metal or other suitable material; to prevent food or other matter entering
and damaging the internal parts. These parts consist of a washer and spring.
The washer E, Fig. III is manufactured from the operculum of any suitable
mollusca. The spring is made of metal or any suitable material, but we do not confine
ourselves to any shape.
The washer E, rests upon the apature A. Fig. I, and is kept in position by the
spring F resting upon it; the spring being kept in its place by the cover or, upper
half Fig. II as shewn in sectional view Fig. III.
The action of the valves is as follows:-
The spring is so adjusted, that by sucking with the tongue against the apature A,

page_text: he washer E Fig. III is lifted and the air withdrawn from the air chamber, a perfect
vacuum is thereby obtained, and secure adhesion of the denture to the palate surface of
the mouth.
Fig. IIII. shows a vertical view of the upper and lower halves in position.
We do not confine ourselves to size, shape, or material mentioned in the description
of the aforesaid valve.
Improvements in Dental Suction Valves.
CHARLES GEORGE KNIGHT, D.D.S. Dental Surgeon, of 12 Queens Terrace Kent
Road, Southsea, & JAMES THOMAS FORD, Engineer, of 6 Outram Road, Havelock
Park Southsea, Hant's 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 this invention is to provide a simple and effective suction valve for
Porting dentures in the mouth.
We effect our object in the following manner By a valve constructed to fit in any
chamber in ordinary dentures.
The external part's consist of two saucer shaped halves Fig. I. and II respectively,
these two part's are made to fit rim to rim. In the centre of the lower half Fig. Í
is an apature A communicating with the air chamber, and at equal distances round
the rim are eight lugs B. B I. four of these lugs are used to fix this half in the
denture, the remainder serve to fasten the upper to the lower when placed together.
In the centre of the upper half Fig. II is an apature D. covered with metal gauze
to prevent food or other matter entering and damaging the internal parts.
The internal parts consist of a washer E. Fig. III. and a spiral spring F. The washe:
is manufactured from the operculum of any suitable molusca. The spring is made of
any suitable metal.
The action of the valve is as follows:-
The washer E which rest's on the metal surface covering the aparture A, and is
kept in position by the spring F pressing against it, the spring being kept in its
position by the cap Fig. II, as shewn in section Fig. III. The spring is so adjusted
that by sucking with the tongue against the aperture A. the washer E is raised and the

page_text: air withdrawn from the air chamber and a perfect vacuum is thereby obtained, and
perfect adhesion of the denture to the palate is secured.
The drawings referred to in this specification are those filed with the Provisional
Specification.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is :-
1st. Two metal saucer shapes so arranged to fit rim to rim, the internal bottom
surface forms the seaton of the valve chamber with a hole through the centre to
exhaust the air. The cover or upper half has a hole in its centre covered with wire
gauze.
2nd. The metal valve surface covered with an operculum washer which is coated
with cork.
3rd. The adiustable metal animal si