A Thickness Gauge for Paper Making Machines.
Year: 1893

page_text: Date of Application, 19th Aug., 1893-Accepted, 23rd Sept., 1893
COMPLETE SPECIFICATION.
A Thickness Gauge for Paper Making Machines.
I, OTTO WILHELM THEODOR AM ENDE, of Bad Harzburg, Brunswick, German
Empire, Engineer, 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 :-
My invention relates to apparatus for measuring the thickness of paper or pulp
in a paper making machine, as I shall describe referring to the accompanying
drawings:-
Fig. 1 represents a plan partly in section.
Fig. 2 is a side view.
Fig. 3 is a section on the line M N of Fig. 1.
Fig. 4 is a part end elevation.
Fig. 5 is a section on the line OP of Fig. 1.
Fig. 6 shews the arrangement of the whole apparatus on a paper making machine,
and its position relatively to the measurement cylinder.
The apparatus consists chiefly of a rectangular box, fitted-First with a slide A
which by means of a micrometer screw can be moved outwards or inwards.
Second. With the divisions on the slide made to an enlarged scale for reading
the thickness of the article to be measured.
Third. With two copper wires a in the slide.
Fourth. With a roller B suspended from arms C to the box by lever arms D.
Fifth. With a copper plate 6 fixed to the plate E connecting the lower parts of
the levers D.
The copper wires a are connected with an electric battery and bell, in any
suitable position, the bell being actuated at any desired moment determined by the
apparatus, apprising the workmen that the prescribed thickness of the pulp or the
paper has been reached.
The apparatus is so constructed as to measure thicknesses down to 11"/m and
that it admits of being set to a degree of accuracy equal to th of a millimetre.
If finer measurements should be required the length of the lever arm to the axis
of the roller B is lessened, or a longer lever arm D may be used. The scale on
the slide will in such case be proportionally increased.
The slide A by means of its springs bearing against the ends of the bolts c is
so far pushed out that the points of both the indicators e stand at zero on both
scales. The slide A can be drawn horizontally into the box by means of the
micrometer screw g working in the bar h which bears against stops i on both sides
of the slide the apparatus being thus set to any desired measurement. The true
movement of the slide is ensured by the angle iron guides f.
Both the lever arms D and along with them the copper plate are connected
with the slide A by springs k and pins passing through a vertical slot of the
springs, the arrangement being such that the front face of the plate 6 is kept
away from contact with the points of the copper wires a a distance of 2 to 3/m
by means of the springs k, but on a slight pressure against the roller B the plate b
is brought in contact with the points of the copper wires a thus closing a circuit
and causing the bell to ring. The roller B will be acted on only when the pulp or
the paper approximately reaches the desired thickness.
The elasticity of the springs kis such that they will yield on the slightest
pressure against the roller B allowing of contact of the plate 6 with the wires a,
without the slide A being itself pushed back into the box.
In graduating the slide A regard is to be had to the movement of the roller B
in a circular path and to the variation of leverage at which the plate b

page_text: touches the points of the copper wires a. In the apparatus shewn a move-
ment of the roller through 10m corresponds to a length of 39 millimetres on
the slide A.
The apparatus, except the connecting piece E, which is of wood, is otherwise
made of metal. It has to be mounted upon a firm stand, and if in a pulp machine,
against the size cylinder as shewn in Fig. 6, being bolted on to the framing by four
bolts n which pass through slotted holes, it being so adjusted that the roller touches
the size cylinder in the horizontal line passing through the centre of the cylinder,
the copper plate b also touching the copper wires a, with the slide set to zero.
this position the electric signal would be heard, but then the slide is to be moved
back by the micrometer screw, until the indicator e points to the required thickness
for the pulp or paper.
In
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
A thickness gauge for paper making machines wherein a graduated slide A
is urged forwards in a casing by springs d and is adjustable by a micrometer
screw, this slide having two copper wires a, connected with an electric bell, and a
roller B, mounted on lever arms D, carrying an insulated plate b, which by pressure
on the roller D is made to touch and connect the wires a, substantially as and for
the purpose set forth.
Dated this 19th day of August. 1893
ABEL & IMRAY,
Agents for the Applicant.