DE7140691U - WORKTOP OR WRITING PLATE FOR A WRITING PROJECTOR - Google Patents

Description

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d.21.10.71 C Gerhard Ritzerfeld, 1 Berlin 33 »Bohorlener Allee 14

"Worktop or 3ohrelbplatte for one Sohreibpro 1 ector "

The innovation looks eioh on a worktop, for example. Writing plate for a writing projector sur support for a su descriptive slide.

In known work plates for Sohreibprojektoren are as Transparent material used on top of Sohrelbfollen glass plates, which are framed in runners and therefore must be provided with a soleplate on all sides on the edges. The frame is covered with the enclosed glass plate while a Hääkeä & ussshuitt is Ssekdlrshsss and is old its edge surface is attached either to the top or on the top of the lid frame. Eioh result in In any case, noticeable transitions include the surface of the glass plate and the surface of the deodorant frame, so that beiepielswelse when using a larger one Writing foil as the glass plate »the Sohreibfolle not flat can rest and bulge, which is a rough projection of the Sohriftblldee sur consequence on the Sohreibfolie can have, besides, let the writing pad «because of the above The perceptible differences in surface area described above do not just look like this that the foil can crumple when writing

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Since the glass plate framed as an independent Component inside has to be mounted somehow on the deodorant frame and therefore no regular surface unit with deir l) can form a vein surface, the disadvantageously shown surface transitions cannot be avoided.

As has also been found, the use of glass plates as work surfaces for writing projectors has an effect because of the necessary grinding of the glass plate edges, combined with the scrap rate customary for glass processing, and the use of an additional frame for the glass plate increases the cost of writing projectors.

The hiring is therefore based on the task of creating a work surface or writing surface for a writing projector see below create that overdeokt a Haskenaussohnitt incorporated in a removable decorative frame and with simple manufacturing and assembly effort in the cover frame a film as described below on the work plate in such a way that a sharp projection of the on the film is guaranteed by the writing projector,

After the hiring, this object is achieved in that the worktop consists of a highly transparent plastic and is stepped in such a way that the upper step in its form corresponds to that of the removable decorative frame of the writing

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Projectors formed Basque Auesohnitt corresponds and is held in their height such that the upper surface of the Seokelrahnens the writing projector and the worktop a Form a level, while the lower step of the worktop is larger than the basque-like cutout.

It is yur setting the countertop in Seokelrahaen Particularly sweeping that the worktop is on the opposite side of the bow-like cutout of the decorative frame by holding tabs that are arranged over the top of the worktop and that are attached to the Deokelrahaen aittela verauben ·

It has also proven to be a gate part that one below and at a certain distance τοη the worktop

duveh. Ib Itaakelrahpen arranged

Stehbolsen old cement cut off on one side attached 1st.

The studs are used for fastening on the side the Lasohenetttcke holding the worktop Ib Deokelrahaen The worktop and the Fresnel lens thus form a munn-i old of the Deokelrabaen an assembly unit.

The present firing is based on one of the drawings

illustrated embodiment explained in more detail Ss show:

Pig.1 is a front view of the worktop; Flg. Figure 2 is a plan view of Pig.1;

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D ν :: IU-, '! 8th

Flg. 3 a 8ohnltt through the Deokelrahaen according to Fig. 4, lengthways the line I-I of Figure 4;

Flg.4 a plan view according to Flg.3;

Fig. 5 is a front view of the type of attachment for the Fresnel lens in the locked state}

Fig. 6 is a plan view of Fig. 5;

7 shows a front view of the type of fastening for the Fresnel lens in the locked state;

Fig. 8 is a plan view according to KLg. 7th

The worktop 1 shown in Figures 1 and 2 consists made of highly transparent plastic and be si did a dea aaskenartigsn cutout of the lid frame 6 (see Fig. 3) corresponding and raised from the worktop 1 worked out Edition 3 for one in the drawings see »» her dajMnatelte Writing foil.

According to FIGS. 3 and 4, the worktop 1 shaped in this way becomes old of the support 3 in the contours. 2 of edition 3 corresponding mask-like cutout 4 of the cover frame 6 fitted. The support 3 of the worktop 1 eohliesst old the upper surface 7 of the Deekelrahaens 6, Until laaa die upper surface 7 of the lid frame ait that in the Deekelrahaen fitted support 3 of the worktop 1 forms a continuous surface unit and thus when a support is placed on descriptive film, which can, for example, be larger than the Maakenausschnltt, the hand area of the film itself to the.

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M transitions from the support surface 3 to the upper surface 7 of the cover frame 6 lie flat without the film creasing when writing on.

The cross-sectionally U-shaped cover frame 6 faces opposite the mask outlet 4 a further section θ, duroh on the one hand the worktop 1 is pushed through to ait its raised support 3 in the mask cutout 4 of the Cover frame top 7 to be fitted, and duroh the other hand, a Fresnel lens 9 receptacle in the cover frame finds.

The worktop 1 cut into the mask area 4 lies with their edge surfaces 10 on all sides on the cover frame underside 11 and is duroh each diagonally over the 3oken of Flap pieces 12 arranged on the edge surfaces 10 are fastened by means of screws 13 in the deodorant frame 6 (see Fig. 3 and Fig. 4)

The Fresnel lens 9, which is arranged below and at a certain distance from the worktop 1 in the cover frame 6, is fastened to the cover frame 6 by means of spacing and lockable standing pillars 19 »

The stud bolts 19 also serve to fasten the tabs 12 holding the worktop 1 in the decorative frame 6, so that additional fastening elements are dispensed with and the associated manufacturing and assembly costs are significantly reduced.

-6-

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Me Figures 5 to 8 show in detail the stud bolts 19 » which with its threaded shoulder 14 duroh the Durohgangslooh 15 "tab 12 inserted and into the underside of the Deokelrahmen 11 eiJifc ^ is screwed. The tab 12 covers the worktop 1.

Purely for the inclusion of the Fresnel lens 9 in the stud bolt 19, the stud bolt 19 has an incision 20, the width of which is somewhat larger than the thickness of the Fresnel lens 9. Above the incision 20 there is a knurled head piece 16, which is somewhat flattened on one side up to the bottom 17 of the incision 20 so that in the unlocked state the Fresnel lens 9 can easily be placed on the bottom 17 of the incision 20 (see Fig. 5 and 6).

The Fresnel lens 9 so inserted into the stud 19 is overlapped by the non-flattened head 18 during a clockwise rotary movement on the knurled head part 16 and held in the Oeekelrabjran 6 (see Fig. 7 and Fig. 8) «

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Claims (4)

Il · · I I I »* 11 IMI Mil III d.21.10.71 Note to Gerhard Ritzerfeld 1 Berlin 33. Sohorlener Allee 14- Sohutz claims: 1. Worktop or writing surface for a writing projector, characterized, that the worktop (1) is made of a highly transparent plastic and is stepped in such a way that the upper step (3) corresponds in its Torah to the carcass-like cutout (4) formed by the removable cover frame (6) of the writing projector and in its Ho * He is held in such a way that the upper surface (7) of the decorative frame of the Sohreibprojektor and the worktop form a level "" honoring dulater ^ step (10) of the worktop is kept larger than the basque-like cutout. 2. Worktop bsw. Sohreibplatte n && £ i Anspruoh 1, daduroh characterized that the worktop (1) on that of the aaske! ^; like cutout (4) of the cover frame (6) on the opposite side duroh each inclined above the Eoken of the worktop and the cover frame aittels Sohrauben (13,19) attached Lasohenstücke (12) is held. 714Θ69127.1.72 »I» ti It · ·· 111 t ■ β · ♦ Il I t t * 1 I Il · · · ι TIIIlIII · ■ ti 3. Worktop according to Anepruoh 2, characterized in that one below and in a certain distance. from the worktop (1) arranged Fresnel lens (9) by means of stud bolts (19) arranged in DeokeIrahmen (6) with one side cut free j nut is attached. 4. Work top in accordance Anspruc ^v t 3 _t characterized in that the studs (19) simultaneously with holding for securing the work plate (1) la Deokelraheen (6) Lesohens-fettcke (12) are used. 5. Worktop according to agreement, characterized in that the worktop (1) and the Fresnel lens (9) together form an assembly unit. 714§89127.172