Improvements in or relating to Articulators and Bite Frames applicable in Mechanical Dentistry for the purpose of Setting up Models of the Mouth in their Relative and Correct Position.
Year: 1898

page_text: Date of Application, 25th June, 1898
Complete Specification Left, 22nd Feb., 1899-Accepted, 17th June, 1899
Improvements in or relating to Articulators and Bite Frames
applicable in Mechanical Dentistry for the purpose of Setting up
Models of the Mouth in their Relative and Correct Position.
We, WILLIAM STRINGFIELD, Dentist, and (Miss) ALICE LEE STRINGFIELD,
Secretary, both of St. Cyres, London Road, Lowestoft, Suffolk, do hereby declare
the nature of this invention to be as follows:-
This invention may be carried out in various ways, but the following descrip-
tion of it in wood and metal will serve to illustrate it. The base is 3½ inches
long, 2 inches in width, and 7ths of an inch in depth, on the flat side of which
at one end is fixed a block 3/4 of an inch thick and exactly corresponding at the
corners with the base but tapering to 14 inch wide at 1½ inch from the back
where it terminates. The whole of this base and block may be cut in one piece
if desired. At the other end of the base on the same side is fastened a precisely
similar but movable block by means of a hinge. On either side and on the
narrower end of each of these blocks is attached a guide plate of the necessary
size and depth arranged in a manner to allow of whatever is cast or placed
between them being removed and refixed in exactly the original position in the
space of two or three seconds. The models are held securely in position by means
of a movable pin. On the top of each block is a number which is transposed on
to the foot of the model cast on it. Under the hinged block is a screw to regulate
its height as required. When fully closed there is a space of ths of an inch
between the narrow ends. There is a small wedge shaped piece made either in
iron or any other material that will withstand the temperature of molten zinc
for the purpose of when the model is moulded in sand filling up the foot portion
When this wedge
so that the model is alone represented in the resulting cast.
is made of lighter material than the zine it has a wire inserted in it that can be
turned so as to anchor it in the sand and thus prevent its floating out. The
following advantages are claimed for this invention-
1. Simplicity of construction and application.
2. Very great saving of time.
3. Any of the parts can be renewed as required.
4. The bite can be effectually
slipping.
and correctly raised without fear of after
5. Each frame numbers the models for after reference.
6. Models can be removed from and replaced in it with a certainty of their
being in exactly their original position in a few seconds.
7. Lightness and convenience in use.
8. The interior articulation of the teeth can be seen from either side.
Dated this 24th day of June 1898.

page_text: Improvements in or relating to Articulators and Bite Frames
applicable in Mechanical Dentistry for the purpose of Setting up
Models of the Mouth in their Relative and Correct Position.
We, WILLIAM STRINGFIELD, Dentist, and (Miss) ALICE LEE STRINGFIELD,
Secretary, both of St. Cyres, London Road, Lowestoft, Suffolk, 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:-
This invention may be carried out in various ways, but the following descrip-
tion of it in wood and metal will serve to illustrate it.
(Fig. 1). The base (1) is 3 inches long, 2 inches in width, and 7ths of an
inch in depth, on the flat side of which at one end is fixed a block (2) 3 of an
inch thick and exactly corresponding at the corners with the base but tapering
to 1 inch wide at 1 inch from the back where it terminates. The whole
of this base and block may be cut in one piece if desired. At the other end of
the base on the same side is fastened a precisely similar but movable block (3)
by means of a hinge (4). On either side and on the narrower ends of each of
these blocks is attached a guide plate (A) of the necessary size and depth arranged
in a manner to allow of whatever is cast or placed between them being removed
and refixed in exactly the original position in the space of two or three seconds.
The models are held securely in position by means of a movable pin (C). On
the top of each block is a number which is transposed on to the foot of the mould
cast on it. Under the hinged block is a screw to regulate its height as required,
when fully closed there is a space of ths of an inch between the narrow ends.
To use this bite frame, see that the pins (CC) are straight and oiled, as also
the interior between the plate (A. A) (A A) then fill this space with plaster or
cement, and having arranged the models, place them together on this plaster or
composition, fixing them with the excess of same, when sufficiently set and the
pins removed, the models will come away with the respective number on the
bottom of the foot of each. To obtain a metal die of the model, it will be neces-
sary to mould the whole as taken from the frame, but, to avoid the foot being
represented in the resulting cast, a small wedge shaped piece (Fig. 2) is pro-
vided, of the same size and shape as the foot, and which is to be placed in the
mould previously to pouring the metal. This wedge shaped piece can be made
of iron or any other material that will with stand the temperature of molten zinc,
but, if of a lighter material than zine, it has provided a means of anchoring it
in the sand to prevent its floating out. This anchorage is obtained by a wire
passing through the wedge as shown in (Fig. 2). A bow being provided the
wider end of the wedge for the purpose of turning the foot (E) at the smaller
end of the wedge, when inserting the wedge (Fig. 2) in the mould the anchor (E)
must be turned so as not to project and will drop into its place, a half turn of
the bow (D) will then fix it securely in position.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is :-
That the shape of the top blocks, the plates attached to each, with the space
seperating the two blocks, and also the automatic method of numbering each
cast, together with the small wedge as described, are novelties which have never

page_text: previously been applied to dental bite frames and afford the advantages as
detailed.
1. Simplicity of construction and application.
2. Very great saving of time.
3. Any of the parts can be renewed as required.
4. The bite can be effectually and correctly raised without fear of after-
slipping.
5. Each frame numbers the models for after reference.
6. Models can be removed from and replaced in it with a certainty of their
being in exactly their original position in a few seconds.
7. Lightness and convenience in use.
8. The interior articulation of the teeth can be seen from either side.
Tated this Olot dow of Fabrum 1800
W. STRINGFIELD,
(Miss) ALICE LEE STRINGFIELD.