Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and information about some of the electronic, electrical and electrotechnical technology relics that the Frank Sharp Private museum has accumulated over the years .

Premise: There are lots of vintage electrical and electronic items that have not survived well or even completely disappeared and forgotten.

Or are not being collected nowadays in proportion to their significance or prevalence in their heyday, this is bad and the main part of the death land. The heavy, ugly sarcophagus; models with few endearing qualities, devices that have some over-riding disadvantage to ownership such as heavy weight,toxicity or inflated value when dismantled, tend to be under-represented by all but the most comprehensive collections and museums. They get relegated to the bottom of the wants list, derided as 'more trouble than they are worth', or just forgotten entirely. As a result, I started to notice gaps in the current representation of the history of electronic and electrical technology to the interested member of the public.


Following this idea around a bit, convinced me that a collection of the peculiar alone could not hope to survive on its own merits, but a museum that gave equal display space to the popular and the unpopular, would bring things to the attention of the average person that he has previously passed by or been shielded from. It's a matter of culture. From this, the Obsolete Technology Tellye Web Museum concept developed and all my other things too. It's an open platform for all electrical Electronic TV technology to have its few, but NOT last, moments of fame in a working, hand-on environment. We'll never own Colossus or Faraday's first transformer, but I can show things that you can't see at the Science Museum, and let you play with things that the Smithsonian can't allow people to touch, because my remit is different.

There was a society once that was the polar opposite of our disposable, junk society. A whole nation was built on the idea of placing quality before quantity in all things. The goal was not “more and newer,” but “better and higher" .This attitude was reflected not only in the manufacturing of material goods, but also in the realms of art and architecture, as well as in the social fabric of everyday life. The goal was for each new cohort of children to stand on a higher level than the preceding cohort: they were to be healthier, stronger, more intelligent, and more vibrant in every way.

The society that prioritized human, social and material quality is a Winner. Truly, it is the high point of all Western civilization. Consequently, its defeat meant the defeat of civilization itself.

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

OLD, but ORIGINAL, Well made, Funny, Not remotely controlled............. and not Made in CHINA.

How to use the site:

- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

Every CRT Television saved let revive knowledge, thoughts, moments of the past life which will never return again.........

Many contemporary "televisions" (more correctly named as displays) would not have this level of staying power, many would ware out or require major services within just five years or less and of course, there is that perennial bug bear of planned obsolescence where components are deliberately designed to fail and, or manufactured with limited edition specificities..... and without considering........picture......sound........quality........

..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

Have big FUN ! !
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©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All sets and apparates appearing here are property of
Engineer Frank Sharp. NOTHING HERE IS FOR SALE !

Sunday, November 28, 2010

NORDMENDE SPECTRA CV 630 1.653 J 18 F23-11S CHASSIS ICC7 CRT TUBE VIDEOCOLOR A59EAU25X01 VIEW







The present CRT invention provides an improvement in the appearance of a cathode-ray tube including a rectangular faceplate with an exterior surface having curvature along both the minor and major axes. The faceplate also includes a cathodoluminescent screen on an interior surface thereof. At least in the center portion of the faceplate, the curvature along the minor axis is at least 10 percent greater than the curvature along the major axis. Points on the exterior surface near the ends of the major axis, at the edges of the screen, lie in a first plane which is perpendicular to the central longitudinal axis of the tube; points on the exterior surface near the ends of the minor axis, at the edges of the screen, lie in a second plane which is spaced from and parallel to the first plane; and points on the exterior surface near the ends of the diagonals of the rectangular faceplate, at the edges of the screen, lie in a third plane which is spaced from and parallel to the first plane. The three planes are spaced from the center portion of the faceplate in the order of second plane, first plane and third plane.

What is claimed is:

1. In a cathode-ray tube including a rectangular faceplate with two long sides and two short sides wherein the long sides of the faceplate substantially parallel a centrally located major axis of the tube and the short sides of the faceplate substantially parallel a centrally located minor axis of the tube, said faceplate having an exterior surface having curvature along both its minor and major axes and said faceplate having a cathodoluminescent screen on an interior surface thereof, said tube including an electron gun therein for generating and directing at least one electron beam toward said screen, and wherein, at least in a center portion of the faceplate, a curvature along the minor axis is at least 10 percent greater than the curvature along the major axis; the improvement comprising
points along the major axis on said exterior surface, located at the edges of said screen, lying in a first plane which is perpendicular to a central longitudinal axis of said tube;
points along the minor axis on said exterior surface, located at the edges of said screen, lying in a second plane which is spaced from and parallel to said first plane;
points along the diagonals of said faceplate on said exterior surface, located at the corners of said screen, lying in a third plane which is spaced from and parallel to said first plane;
said first, second and third planes being spaced from a fourth plane, which is parallel to said first, second and third planes and is tangent to the center portion of said faceplate, in the order of said second plane, said first plane and said third plane;
the ratio of the spacing between said second and fourth planes, measured along the central longitudinal axis of said tube, to the spacing between said third and fourth planes being greater than the minor axis dimension of the screen, squared, divided by the diagonal dimension of the screen, squared, and less than one;
the ratio of the spacing between said first and fourth planes, measuredalong the central longitudinal axis of said tube, to the spacing between said third and fourth planes being greater than the major axis dimension of the screen, squared, divided by the diagonal dimension of the screen, squared, and less than one; and
the exterior surface curvature along said minor axis essentially being circular from the center of said faceplate to said second plane, and the exterior surface curvature along said major axis essentially being circular near the center of said faceplate and increasing in curvature near the sides of said faceplate to said first plane.


2. The tube as defined in claim 1, wherein the spacing between said first and second planes approximately equals the spacing between said first and third planes.

3. The tube as defined in claim 2, including said tube having a viewing screen with an approximate 69 cm diagonal and wherein the spacing between said first and second planes is about 4 mm and the spacing between said first and third planes is about 4 mm.


Description:
This invention relates to cathode-ray tubes (CRT's) and, particularly, to the surface contours of the faceplate panels of such tubes.
BACKGROUND OF THE INVENTION
There are two basic faceplate panel contours utilized commercially for rectangular CRT's having screen sizes greater than about a 23 cm diagonal: spherical, and cylindrical. Although flat contours are possible, the added thickness and weight of the faceplate panel required to maintain the same envelope strength are undesirable. Furthermore, if a flat faceplate CRT is a shadow mask color picture tube, the additional weight and complexity of an appropriate shadow mask also are undesirable.
Recently, it has been suggested that spherically-shaped CRT faceplate panels be improved by increasing the radius of curvature of the panels by a factor of 1.5 to 2. Such increase in radius of curvature reduces the curvature of the faceplate panel, thereby permitting more satisfactory off-axis viewing of a tube screen. Although such tubes having increased radius of curvature do provide improved viewing, there is still a need for even flatter faceplates or, alternatively, for tubes that appear to be flatter.
A new faceplate panel contour concept which creates the illusion of flatness is disclosed in three recently-filed, copending U.S. Applications: Ser. No. 469,772, filed by F. R. Ragland, Jr. on Feb. 25, 1983 and now U.S. Pat. No. 4,839,556; Ser. No. 469,774, filed by F. R. Ragland, Jr. on Feb. 25, 1983 and now U.S. Pat. No. 4,786,840; and Ser. No. 469,775, filed by R. J. D'Amato et al. on Feb. 25, 1983 and now abandoned. The contour has curvature along both the major and minor axes of the faceplate panel, but is nonspherical. In a preferred embodiment described in these applications, the peripheral border of the tube screen is planar. In such tubes, it is important to contour the faceplate panel diagnosis so that the differing curvatures extending from the major and minor axes are properly blended. In the above-cited U.S. application Ser. No. 469,774, this blending is accomplished by permitting at least one sign change of the second derivative of the diagonal contour in the center-to-corner direction.
The present invention provides a novel faceplate panel contour which appears flatter than the suggested longer radius tubes and which does not require the use of much thicker glass to maintain tube strength.
SUMMARY OF THE INVENTION:
The present invention provides an improvement in a cathode-ray tube including a rectangular faceplate which has an exterior surface having curvature along both the minor and major axes. The faceplate also includes a cathodoluminescent screen on an interior surface thereof. At least in the center portion of the faceplate, the curvature along the minor axis is at least 10 percent greater than the curvature along the major axis. In the improvement, points on the exterior surface near the ends of the major axis, at the edges of the screen, lie in a first plane which is perpendicular to the central longitudinal axis of the tube; points on the exterior surface near the ends of the minor axis, at the edges of the screen, lie in a second plane which is spaced from and parallel to the first plane; and points on the exterior surface near the ends of the diagonals of the rectangular faceplate, at the edges of the screen, lie in a third plane which is spaced from and parallel to the first plane. The three planes are spaced from the center portion of the faceplate in the order of second plane, first plane and third plane.



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