DE1907514A1 - Front plate for recording tubes with thin window - Google Patents

Description

■■ -. "■ PATENT AGENCIES:

. H.LEINWEBER dipping H. ZIMMERMANN

Pojftchodc account: Bank account: Telephone TeU addr. Munich 22045 Dresdner Bank AG. Munich (0811) 261989 Leinpat MUndren Munich 2, Marlenplatz, account no. 92790 Z / We / ho V 1907514 EOS-17293 8 Munich 2 _t Rosental 7, 2nd issue. (Kustermann Passage)

■ the 1.4. February 1969

MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., Osaka, Japan ' Faceplate for recording tube with thin window

The invention relates to a recording tube with a thin window, in particular the construction of a tube piston faceplate of known slot recording tubes.

In such a thin window recording tube, it is known to consist of a tube piston -'- face plate from a sheet of glass or mica that is on one side with fluorescent material is coated, on which a thin aluminized coating is firmly applied, on the surface to glue the tube by means of a suitable binding agent, so that the slot made in the tube surface is completely is covered by the faceplate. About the loss of the initial brightness to a minimum and the. As is known, to limit light beam diffusion, the total thickness of the End plate should be as small as possible, if one is constructed in this way Recording tube is used. The reduction in the face plate thickness however, has a reduction in their mechanical strength as a result, so that by the action of the atmosphere Pressure can sometimes cause great damage.

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In order to increase the strength of the end plate against atmospheric pressure, according to the invention, the; The slot width is reduced in such a way that the area of the faceplate exposed to the vacuum is considerably reduced; j.st _:. However, as tests have shown, this leads to a reduced rate; Straightness of the slot. \ ■ / /

The invention provides an end plate for a Aufzeieh-.nungsröhr e with a thin window, which has sufficient mechanical strength without its straightness suffered. . '- · ..' ^:

When reducing the width of the slot in the tube surface such a recording tube has the problem that when the faceplate is attached to the tube surface the hot, im. Melt state Sometimes the binders are not right up to the edge of the slot will flow, which will affect the adhesion or worse, the binder will flow into the slot and this is then glued.

According to the invention there is provided an end plate for a recording tube with a thin window in which both the tube surface and the end plate are defined Places are covered with binder. ·. .

Further advantages, details and features of the invention will become apparent from the following description, on the - drawing is shown, for example, the invention and indeed show ■

Fig. 1 is a plan view of the tube surface of a loading - known recording tubes with a thin window, FIG. 2 shows a child in level I-1 of FIG. "Iy.

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Pig. 3A and 3legsLängs- or. ; a cross section through the Slot in "the tube surface, a well-known Stlrr plate,: "-

Figures 4A and; 4B a longitudinal or a cross-sectional ax . Slot of a faceplate according to the invention,

Fig. 5 is a vertical section of the slot ^: a modified embodiment of the known face plate,

Fig. 6A is a vertical section through the slot of another embodiment of the invention, ^: .

6B shows a cross section in the plane Π-ΪΙ of FIG. 6A, and '■ ".-". . . -

7 is a view to illustrate the inventive

. measure application of the faceplate to the tube surface. '

Figs. 1 and 2 show a known thin window recording tube 3. It has a straight slot 1 which is made in the surface 2 of the air drawing tube 3. A face plate 4 is attached to the surface 2 by means of a layer of a suitable binding agent (FIGS. 3A and 3B). The Stirnplatt.e 4 consists of a micro-panel 6 of glass or mica, .the eti Innenseite- is coated with a fluorescent layer 7 of phosphorus and from an aluminized coating 8, which at the. fluorescent layer 7 is attached and has the same size as this. The areas of the fluorescent layer 7 and of the aluminized coating 8 are considerably smaller than the opening of the slot 1. In this way, the slot 1 is tightly closed by the face plate 4 with the aid of the binder layer 5. '-. '. "-.-.

With such a front plate'4 the vacuum in the_ - "■■ '■■ ■' - ' \ - /:".;-; ■■ - '■■ "■■ ■ -.- 4--

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Inside the Aufzeiehnungsrohre 3rd exposed part, sucked inwards, so that the whole faceplate is distorted and can be damaged as a result. But if you narrow the SeMitz, in order to avoid such damage * then the effective * -. " same luminescence area too small. ,. ; :,.-.-. . ; -

These disadvantages of the known face plates are eliminated according to the invention by an improved structure and an improved arrangement of the face plate. 'r ; ; _ · ■

In FIGS. 4A and 4B, a micro-panel 10 is made of oil. or, mica, which corresponds to the micro-panel 6 of the known Stirnplatte- ^J speaks, with the exception of a portion 11 which is directed towards the interior of the recording tube 3 formed thicker than the herkömmlichenMikrotafeln .: The fluorescent layer 7 of phosphorus and the subsequent Applied aluminized coating 8 are on part 11 of the micro-panel 10 according to the known. Front plate 4 attached. The part 11 is approximately the same size as the opening of the slot 1. · "->;"": / ^v ;

With the exception of the thin part 11, the micro-panel 10 can have a sufficient thickness so that the mechanical strength of the entire faceplate is largely increased. Without the width of the slot 1 is ^{reduced,:.:: '^':: ':}

In order to increase the mechanical strength of the end plate, it is known that the width of the Sehiitzesv; reduced as possible. . ^: , V "-? V _;:

In Fig. 5 is an example of the construction and the; , Arrangement of the face plate of a recording tube with thin. Window shown. The recording tube 3 has an end plate 13 on its surface 2. The latter * consists of a ν glass sheet 14, which is attached to the surface 2 of the tube by means of a ^v

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Binder layer 15 is attached to a micro-panel 16, the is attached to the glass sheet 14 by means of a binder layer 17 corresponding to the binder layer 15, a fluorescent one Layer 7 made of phosphor, which is applied to the inside of the micro panels 16, and an aluminized coating 8 on the inside of the fluorescent layer 7. The fluorescent layer 7 and the aluminized coating 8 are approximately the same size as the opening of the slot 12. At the A conductive layer which is in contact with the aluminized coating 8 is provided on the inside of the piston of the tube 3.

A problem with such a construction of a known faceplate is that when the faceplate 13- is glued to the surface 2 of the recording tube using a high-temperature binder, the phosphors forming the fluorescent layer 7 are contaminated by capillary action by the hot, melted binder and what is worse, the binder can easily flow into the slot 12, which then sticks together. Another disadvantage is that the conductive layer 19 becomes detached from the aluminized coating 8 and slips, so that when the faceplate is applied to the tube surface, its contact is severely impaired. For technical reasons, however, it is not possible to glue the micro-panels 16 onto the tube surface 2 before it is provided with the fluorescent layer and the aluminized coating. If, on the ^other hand, a projection is provided on the glass sheet directly on the entire upper edge in order to prevent the binding agent from penetrating into the interior of the slot (FIG. 5), then it is extremely difficult to achieve sufficient straightness and a uniform width of the slot 12 .

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In order to eliminate these disadvantages, a metallic reinforcement is provided according to the invention on the entire band of the slot 12. . , ^ ' ■ -'-_ " ■

As shown in Figures 6A and 6B, on the entire edge of the slot 12 in the tube surface is a; metallic reinforcement 20 is arranged, which connects the conductive layer 19 and the aluminized coating 8 to one another. The structure of the end plate 13 ^r can essentially correspond to that of the end plate 13 in FIG. :. - _;

Since in this embodiment the binder layers 15 and 17 are effectively isolated from the inside of the slot 12 by the metallic reinforcement 20 ", the binder can never flow into the slot 12 when the faceplate is applied to the tube surface. In contrast to that determined by the edge of the reinforcement Part 18 of the slot with an order of magnitude of 0.5 to 0.8 μ , the slot 12 in the tube surface 2 can be significantly widened. This ensures better straightness and a more uniform width of the slot 12.

The metallic reinforcement 20 consists of a material with the same coefficient of expansion as the glass sheet 14th

So that the binding agent does not get into the slot 12 of the tubes surface, penetrate, but right to the edge of the slot can flow, the application of the end plate to the tube surface is significantly simplified by the fact that specially for it manufactured inserts are used.

According to Fig. 7, the tube surface 2 has a outwardly narrowing slot 22, the very outside only 0.5

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up to 0.8 μ . Before the microplate 6 is attached to the tube surface 2 by means of a binder layer 21, a wedge-shaped insert 23 is fitted into the slot 22 of the tube surface and its outer edge is held in contact with the inside of the microplate 6. It is important that the contact surfaces of the microplate 6 and the insert 23 are subjected to a special mirror grinding process, in order to achieve a completely sealed support. The insert 23 inserted into the slot 22 of the tube surface prevents the penetration of when the microplate 6 is applied to the tube surface 2. hot, molten binder into the slot, but allows the binder to flow to the edges of the slot 22, so that a firm connection between the micro-panel 6 and the tube surface 2 is achieved.

After the micro-panel has been applied to the tube surface, the insert 23 is removed from the slot 22 again.

The insert can consist of any material that is compatible with the binder, but preferably of carbon or meehanite cast iron, in which case the binder "Slit glass" is used. - ■ .- .: "

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Claims (4)

latent a η sprüe η e s: MJ faceplate for a drawing tube with a thin · .; Window with a straight slot running in the longitudinal direction towards the upper surface of the window, characterized by a glass panel (10), which is essentially the same size as the opening area of the slot (12), a fluorescent layer (7) of phosphor on the inside the micro board (10 :), an aluminized coating (8) on the inside of the fluoreszier-generating layer (7), the fluorescent layer -ill- and the alufflinized coating (8) are essentially mine than the slot {12), as well a binding agent layer (15) for the mouths of the micro-panel (10) with the Eöhrenoherflaehe (2) (Fig, 4A, 4B). \ \ - 2. Front plate according to claim 1, characterized in that that the micro-panel (10) is thickened with the exception of a part (11) opposite the slot (12). , 3. Face plate for a recording tube with thin Window, with a run in longitudinal direction to the surface of the ear end, straight slot, characterized by a micro panel (16), which is essentially the same size as the opening area of the slot (12), a glass panel (14) with a straight, sehmaleren Sehlitz than the Böhrenschlitz (12), the on the inside of the micro panel (16) and the Söhrenoherflache (2) by means of a binding agent (I?) Is attached a metallic reinforcement (20), which is on the entire hand of the slot (12) attached to the Böhrenoberflache (2) and with a conductive Layer (19) of the hole piston is connected, whereby the slot defined by the metallic reinforcement (20) is smaller is a fluorescent one than the one in the Eöhrenoberf lache Layer (7) of biosphorus on the inside of the Mkr'afel (16) ,, : 909836 / Ί137 ^IT;: ".; - - _: 1" _. ¹ I 07514 - 9- "■■ '■ - ^.; ■ - ■■■■ and an aluminizing coating (8) on the inside of the fluorescent one Layer (7), which is isolated from the binder layer (17) by the metallic reinforcement (20) (FIGS. 6A and 6) 6B). 4. A method for attaching the face plate according to Än claim 3 on the slot in the tube surface, characterized by the following process steps: fitting a wedge! shaped insert (23) into the slot (22) until the band of the '- insert (23) rests tightly on the inside of the micro-panel (6)! Applying a binding agent (21) between the micro-board (6) and the ßöhrenoberflache, and removing the insert (23) from the slot (22) after the binding agent (21) has solidified (Fig. 7). 90983 6/1137