A New or Improved Tooth-brush.
Year: 1899

page_text: Date of Application, 27th Nov., 1899-Accepted, 6th Jan., 1900*
COMPLETE SPECIFICATION.
A New or Improved Tooth-brush.
I, REGINALD HADDAN, of the Firm of Herbert Haddan & Co., of 18, Bucking-
ham Street, Strand, W.C., Patent Agent, do hereby declare the nature of this
invention a communication to me from abroad by Wilhelm Stark, of Berggasse
No. 21, Vienna IX, Austria, Doctor of Medicine, 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 a new or improved tooth-brush and is intended to
thoroughly and hygienically clean the teeth in the spaces between the single
teeth, both inside and outside.
In the accompanying drawing the new tooth brush is shown in,
Fig. 1 in side view, and in
Fig. 2 in plan view.
The brush consists of two curved arms a and b which are each near one end of
their insides, set with bristles whilst the other ends are used as handles.
The arm a carries bristles in the form of a convex bow corresponding with the
outer curve of the row of teeth, whilst the bristles on the arm follow the inner
curve of the row of teeth.
The arm a possesses a prismatic triangular prolongation d which rests with
its edge in a suitable recess in the arm b. An india rubber ring e holds the two
arms a and b together. When the ends of the arms a and b used as handles are
pressed together, the ends set with bristles separate from each other and the tooth
brush a can be put on the teeth. If the pressure is released the brush will close
and the arms are pressed close to the teeth by the effect of the india-rubber
ring e It is important that the bristle bundles of both the brushes do not corre-
spond but that the bundles of the one arm engage in the intermediate spaces of
those of the other.
The purpose of this arrangement of the bristle bundles is to enable the bristles
to enter the spaces between the teeth.
Prolongations and g on the arm a limit the opening and closing of the brush.
The use of the tooth-brush is as follows:-
By a pressure on the handles the ends of the arms a and b set with bristles
separate from each other and the tooth brush is brought then on the teeth and
the latter are cleaned by moving the brush to and fro. In cleaning the second
half of the set of teeth the brush must of course be turned in order to fit to the
rounding of the set of teeth.
By the rounding of the arms the brushes will adapt themselves exactly to the
outer and inner rounding of the set of teeth enabling an hygienic and perfect
cleaning of the teeth and the brushes are automatically pressed to the teeth by
the india rubber ring.
If the brush is moved on the upper teeth from above downwards and on the
lower teeth from below upwards the one set of bristle bundles bears firmly against
the tooth surfaces whilst by the pressure of the india rubber ring the other set of
bristle bundles penetrates between the teeth and so removes deposited matter in
the direction of the edge of the set of teeth.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what
I claim is
1. In a tooth brush, the combination of two arms a and b each provided with
bristles near one end, the other ends being adapted to serve as handles having
respectively an edged projection d on the arm a, and a recess therefor in the
arm b, together with an elastic ring e surrounding said arms a and b for the
purpose set forth.
2. In a tooth brush the combination of arms a and b, means for pivoting the one
on the other and bristle bundles on the opposing faces of arms a and b so placed 1
that the bundles of the one arm engage in the intermediate spaces between the
bundles of the other arm for the purpose set forth.
1 1
0711
N amhan 1000