Device for Facilitating Teaching Arithmetic.
Year: 1898

page_text: Date of Application, 18th May, 1898-Accepted, 6th Aug., 1898
Device for Facilitating Teaching Arithmetic.
I, AUGUST LAY, of No. 88A, Ruppurterstrasse, Carlsruhe, Grand Duchy of Baden,
German Empire, Seminary Teacher, do hereby declare the nature of my said
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The present invention consists of a device for facilitating the teaching of
arithmetic and in the accompanying drawings the same is shown in combination
with the ordinary class of box or case for pens, pencils and school utensils generally
as employed for the children.
In the accompanying drawings, forming part of the present application and in
which similar letters denote similar parts throughout the several views, Fig. 1 is
a sectional plan and Fig. 2 a cross section of one form of carrying the invention
into practice and Fig. 3 is a part plan view with the cover half removed, Fig. 4
a part section taken across the box and Fig. 5 a part side elevation with one wall of
the box removed of a further modification of the device.
According to Figures 1 and 2 the device consists of a box having sliding lid A
to the under or interior side of which are attached a number of buttons or knobs B
which may be taken out and replaced, being held in position by friction of the
stems of the said buttons with the holes of the lid. In the present case two rows
of buttons are shown, the distance c of the same apart being advantageously the
same as that d of the individual buttons. The rows may be divided in the middle
by a line a so that ten buttons will be on each side of the line. In operation the
buttons may be taken out and replaced and in this manner simple examples of
addition substraction etc. be illustrated. The end wall of the box is cut away so
as to allow the buttons to pass when the cover is withdrawn.
In Figures 3 to 5. two wire bows E are attached to the bottom of the box and
beads F having diametrical lugs f are arranged on the same.
The examples may
be carried out in this form of the application by sliding the lid H into various
positions and thus covering more or less of the beads. The bows E may be fast
in the bottom D of the box, or one end of them may be open so that the beads
may be removed at will and the apparatus worked in the same manner as that
described with reference to Figures 1 and 2.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
1. A device for facilitating teaching arithmetic which consist in detachably
arranging a series of buttons or beads on a suitable surface, the former being sup-
ported by stems on the same engaging in orifices in the said plate and the latter

page_text: being supported on suitable bows and having diametrical lugs to keep them apart
substantially as described.
2. The arrangement of the buttons or beads on the interior surface of a box
substantially as described.
Dated thi. 19th day of Mo 1909
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.