Improvements in so called Articulators for Use in the Manufacture of Sets or Partial Sets of Artificial Teeth to be Worn in the Mouth.
Year: 1886

page_text: Date of Application, 25th Aug., 1886.
Complete Left, 3rd Mar., 1887.
Complete Accepted, 5th Apr., 1887.
Improvements in so called Articulators for Use in the Manufacture
of Sets or Partial Sets of Artificial Teeth to be Worn in the
Mouth.
I AMBROSE HOWARTH of Manningham Lane, Bradford in the County of York
Dentist do hereby declare the nature of this invention to be as follows :-
This Invention rolates to improvements in articulators, the same being a device for
enabling the dentist to accurately adjust a set or partial set of artificial teeth to the
"bite" taken from the patients mouth.
The articulator consists of five main parts, that is to say; two blocks with a hinge
between same, upon each of the said blocks is a piece of cast or stamped metal having
projections, ridges grooves dwells or hollows upon the upper surfaces. The projections
ridges, grooves dwells or hollows act as guides for holding the plaster or other models
in accurate register, and also form a permenant register of the relative positions of
the models when said models may be required to be removed or readjusted.
The hinge is placed in such position that the block carrying the model of the lower
set or partial set of teeth will move in a similar manner to the lower jaw in man.
The movement of the hinge is controlled by the addition at the sides or through the
centre of india-rubber or spiral springs.
A feature of this articulator is that the models are readily placed in position and as
readily moved for examination, especially for examination of the backs of the teeth.
viewed from behind.
Another important feature is that the slightest irregularity of the "bite" may be
corrected in a natural manner, that is whilst correcting an error in the molars the
other teeth are not placed at an unnatural angle.
To raise the "bite" it is only necessary to place a piece of material such as
cardboard between the adjacent edges of the two blocks above the hinge.
Dated 25th August 1886
WALTER A. BARLOW,
6, St. Paul's Churchyard, London,
Agent for Ambrose Howarth.

page_text: COMPLETE SPECIFICATION.
Improvements in so called Articulators for Use in the Manufacture
of Sets or Partial Sets of Artificial Teeth to be Worn in the
Mouth.
I AMBROSE HOWARTH of Manningham Lane Bradford in the County of York
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:
This Invention relates to improvements in articulators the same being a device for
enabling the dentist to accurately adjust a set or partial set of artificial teeth to the
"bite"taken from the patients mouth.
This articulator consists of five main parts, that is to say, two wood blocks with a
hinge between same. Upon each block is a piece of cast or stamped metal, having.
projections, ridges, grooves, dwells, or hollows, upon their upper surfaces.
The projections, ridges, grooves, dwells or hollows act as guides for holding the
plastor or other models in accurate register and also form a permanent register of
the relative positions of the models when said models may be required to be removal
or re-adjusted.
The hinge of the two blocks is placed in such position that the block carrying the
model of the lower set or partial set of teeth will move in a similar manner to
the lower jaw of Man.
The movement of the hinge is controlled by the addition at the sides or through the
centre of india-rubber rings or spiral springs.
A feature of this articulator is that the models are readily placed in position and as
readily moved for examination especially for examination of the backs of the teeth
viewed from behind.
Another important feature is that the slightest irregularity of the "bite" may be
corrected in a natural manner that is whilst correcting an error in the molars, the
other teeth are not placed at an unnatural angle.
In the Drawings annexed hereto Fig. 1 is a side view showing the articulator with
the models of an upper and lower set of teeth thereon, open from the "bite," the
dotted lines show the articulator in closed position to the "hite." Figs. 2 and 3
representing surfaces of the cast or stamped metal facing plates of the blocks
illustrating in Fig. 2 projections formed of letters with dwells or hollows between
them. In Fig. 3, diagonal ridges are shown with dwells or hollows between them.
a is the block for receiving the model of the lower jaw. the block for receiving the
model of the upper jaw. c is the hinge between the two blocks. dare india-rubber
bands stretched over pins d², controlling the movement of the hinge c., e are the metal
plates having thereon the projections, ridges grooves, dwells or hollows to which the

page_text: models are moulded so as to ensure proper register for readjustment of the "bite"
after removal of the modal. f, f¹ are india-rubber bands which are stretched over
and hold the models, 9, g¹ in position and allow of their ready removal.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same performed I declare that what I claim is :-
Firstly. The Articulator as herein described consisting of the blocks, a, b, hinge c,
side springs d, surfaced register plates e, constructed and opperating as and for the
purpose herein set forth.
Secondly. In an Articulator the register plates e, as and for the purpose set forth.
WALTER A. BARLOW,
6, St. Paul's Churchyard, London,
Agent for Ambrose Howarth.