DE7143502U - Calculation aid, in particular for learning purposes - Google Patents

Description

New description

/ Calculation aid, especially for learning purposesN ^ iit lasting :! Markings on a writing pad / ^

The innovation relates to a research aid, in particular for learning purposes, with permanent markings such as Purüctfelgen or lots of pictorial symbols on a writing document.

The arithmetic lesson deals with the first basic scarf classes deal with numbers and quantities.

To process the quantities, the arithmetic books of the grand schools contain one or more sheets on which, for example, the Lot of 100 in the form of 100 black dots a of white Paper is shown. By circling partial sets arithmetic operations are indicated addition, subtraction, in Practicing taking, dividing and distributing times.

For reasons of clarity, such a sheet is only suitable for a few arithmetic operations. Then you have to either a new sheet of paper can be used or erased. If you use new leaves, there will be disorder and over the course of the day Noticeable paperwork over two school years. Erasing - especially with school assignments - is very annoying Time expenditure and creates unclean sheets.

The aim of the innovation is to remedy this by making one of the deletion processes easier and more acidic and on the other hand, the service life of the calculation aid is increased.

In principle, this should now be achieved by that the surface carrying the markings is practically not affected by the deletion process. This becomes the goal achieved that the writing pad through the with a transparent or translucent intermediate film and underlying colored base deposited transparent film of a writing board is formed, the colored base and transparent intermediate film by writing pressure in such a way : that the written text can adhere to one another

visible wxrd and that between the faroiger base and the transparent one Intermediate film has a mechanical separating means that is movable in the interface relative to this.

The principle of innovation therefore consists in a reflection known Schrcibtafein to new in the application simpler and more permanent calculation aids.

] Writing boards of the type mentioned are widespread in the trade

and generally consist of a relatively rigid sheath-like Frame with a writing card that can be pulled out to a full extent and erased, usually through

ν three or four layers combined to form a unit

-I will educate. The lowest layer consists of a thin one

Ϊ stiffening sheet. mdlJ ^ rbauf order. The paint application can

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can also be designed as a separate colored layer. As a next-coast layer, an aux-ohöeheiiiöjaäo! Foil made of a kind of tissue paper is placed over it. The top layer that forms the writing surface is made of transparent film * These layers are not joined together at the edges parallel to the direction of drawing and a narrow, practically dimensionally stable strip of material is mounted in the frame, which reaches through between the colored and translucent layer. The writing process is carried out by pressure with a pen or a somewhat pointed object. The pressure causes the translucent layer to adhere to the colored base, which makes the translucent layer appear transparent in these areas. The font can be deleted by the ⁿ write map "is withdrawn from the shell-like frame where appropriate, up to the stop, wherein the through cross between colored and translucent layer mounted on the open for the withdrawal of the card side of the frame material strip for separation of the two Layers ensures

The upper transparent film of the Schreifckarte is now ! additionally provided with markings, e.g. dots (see Template). The points represent those required in the sixth class The pupils can now use the points marked on the transparent layer circle around, delimit, process with a pen in the sense of the arithmetic operation to be carried out. Is the arithmetic operation finished, the student can ε j * e working lines

delete by pulling out the "writing card". After pushing in the "writing card" can be reworked on a fresh surface.

The design of the innovation is done in such a way that markings can be applied to the transparent layer. Sas anger the markings can e.g. B. by gluing, printing or by photographic means. Preferably will mark the inside of the transparent layer so that it cannot be peeled off or scratched off (On the models, points were applied on the outside). The number and arrangement of the markings is arbitrary. Preferably However, the 100-point arrangement shown on the models corresponds to the practical requirements of arithmetic lessons. The points can also be labeled. Instead of the dots, symbols can also be used (e.g. apples, Balls, etc.), in order to increase the clarity of the set terms.

Claims (3)

r (I I * ι ι ι Today's protection claims 1) calculation aid, in particular for training purposes, with "permanent labels such as point sequences or quantities in pictorial symbols on a writing pad in that the writing support is formed tabular by a transparenteil or translucent intermediate foil and underlying colored substrate deposited transparent film of a write, whose colored base and transparent intermediate film can be bonded to one another by writing pressure so that the written text is visible and the between the colored base and the transparent intermediate film has a mechanical separating agent that is movable in the interface relative to this. 2) arithmetic aid according to claim 1, characterized in that the Markings are made on the inside of the transparent film. 3) calculation aid according to claim 1 or 2, characterized by printed, glued or photographically applied markings. zj: - · " - »!.» Vi-l · I «, uw Λ. VII.