DE530115C - Reading device for strongly reduced fonts produced on glass - Google Patents

Description

Reading device for strongly reduced fonts produced on glass The following is an avoidance of any typographical aids (microphotographically) manufactured book replacement plate together with the handling of the same enabling reading device described, whereby the storage of an indirect readable and findable large literature is made possible in a small container.

The pages of a book or manuscript are named after a certain Procedure scaled down on an approximate scale of i: i oo linearly and so on a small right-angled glass plate arranged into a whole that it is the plane meet a coordinate system running exactly parallel to the slab edges, in such a way that that page i lies in the o-point, the page numbers increasing with the x and y parameters can be found with the naked eye, while the marginal ridges other information on the plate, such as title, content, etc., in macroscopic dimensions included for easier orientation.

An easily readable document like a book, becomes such a plate only through a reading device giving the pressure in natural size with a manually operated displacement and adjustment mechanism, which can also be used in conjunction with a projector.

Fig. I of the drawing illustrates the book plate and Fig. 2 the Image of the appearing in the round image field of the reading or projection device Book mirror. Fig. 3 shows the displacement device through which Bring the tiny pictures of your choice quickly into the field of vision or image permit.

With the help of a slide S running in balls (Fig. 3), the plate B, which re-enters the second slide S 'with explosive balls X on Z-angle stop W. Top left, moves through the axis of the projection head (between light source and lens).

While the slide, which is constantly pulled to the left by the spring tensioner F S can be moved millimeter and stepwise in the x-axis by pressing the T key one the. for example, rows of lines comprising 5o book pages by rotating of the lateral micrometer drive M and moving the slide S 'in the y-axis Adjust by eye or to snap into place.

It is easy to see that the whole mechanism is strictly classified corresponds to the glass plate and all indices present on the device only one Continuation, a handy coarsening, just this facility of the glass plate represent.

The upper left corners of the glass plates (o-point of the coordinate system) are ground strictly at right angles and are held in place by two resilient balls K in the just as precisely worked corner of the slide S 'pressed. When the page lines run exactly parallel to these edges, the handling is still safe so many plates guaranteed.

While the pages are set from 50 to 50 on the drive M, the individual pages jump in when the T key is pressed, and a sliding index J with joint G on the bar shows what is in the field, i.e. where the book is opened is.

Claims (2)

PATENT CLAIMS: i. Reading device for manufactured on glass plates, greatly reduced fonts, characterized by a parallel to the margins of the rectangular plates movable compound slide (S, S '), which is through a Set the keyboard device (T) and a micrometer movement (M) accordingly leaves and has means to the respective setting of the carriage or the plate to be able to recognize by book pages. 2. Reading device according to claim i, characterized characterized in that the glass plates have macroscopic contents at the edges and bear figures.