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 !

Wednesday, April 13, 2011

AUTOVOX Mod. TVC2694/E CRT TUBE WESTINGHOUSE A67-140X





AUTOVOX  Mod. TVC2694/E  CRT TUBE  WESTINGHOUSE  A67-140X, Cathode ray tube second electrode having rectangular projecting ridge:

 1. An improved electron gun for use in a color television cathode ray tube, which electron gun comprises a cathode from which an electron beam is emitted, at least a first and second electrode disposed along the electron beam path for controlling and accelerating the electron beam, which first control electrode has a centralized aperture therethrough along the electron beam axis, and which second electrode is adjacent the first electrode, and comprises a generally cylindrical side wall portion, and an end closure portion at the end proximate the first electrode, which end closure portion includes a centralized circular aperture therethrough along the electron beam axis, and a rectangular projecting ridge formed in the end closure about the centralized circular aperture, and projecting from the plane of the end closure toward the open end of the second grid, to thereby comprise an astigmatic electron lens which produces an electron beam which is elongated in cross section in the same direction as the rectangular projecting ridge.

2. The electron gun specified in claim 1, wherein the rectangular projecting ridge has a minor ridge length which exceeds the projection height of the ridge by greater than 2 to 1, while the minor ridge length exceeds the diameter of the centralized circular aperture in the second electrode end closure by greater than 3 to 1.

3. The electron gun specified in claim 2, wherein the preferred ratio of minor ridge length to ridge height is 2.6 to 1, while the preferred ratio of minor ridge length to aperture diameter is 3.5 to 1.


Description:
BACKGROUND OF THE INVENTION
The present invention relates to color television picture tube electron guns. The electron gun generates an electron beam which is directed and accelerated by an electrostatic field. The electron beam impinges the luminescent elements which make up the picture tube screen. A conventional picture tube utilizes a horizontally sweeping electron beam raster, and this regular periodic raster beam should go visually undetected in order to minimize viewer distraction with the entire image formed on the screen. The regularity of the raster can give rise to optical interference patterns. It is known that an astigmatic electron lens can be used to alter and shape the electron beam area which impinges the phosphor screen to minimize optical distractions. Such an astigmatic lens is taught in U.S. Pat. No. 3,852,608 in which the electron beam is elongated in the direction normal to the raster sweep direction.
The astigmatic element is described as two plates, which are segments of a circle which are attached to the end closure portion of the second electrode of the electron gun. The plates are disposed on the side of the end closure facing the third electrode. The plates define an elongated passage about a centralized beam admitting aperture in the second electrode end closure. Such plates require a separate fabrication and assembly operation. The reference patent also teaches a unitary second electrode astigmatic lens in another embodiment, in which the end closure of the second electrode is provided with an elongated bulge formed in the end closure of the second electrode. The elongated bulge extends toward the first electrode.

BRIEF DESCRIPTIONS OF THE DRAWINGS
FIG. 1 is a schematic representation of a color television picture tube.
FIG. 2 is an enlarged view partly in section of a portion of the electron gun structure per the invention.
FIG. 3 is a view looking into the second grid showing the improved grid structure.
FIG. 4 is a view in section taken along line 4--4 of FIG. 3 to show the improved grid structure of the present invention.


DESCRIPTION OF THE PREFERRED EMBODIMENT
The color television cathode ray picture tube 10 shown in FIG. 1, employs three electron guns 12 disposed in the neck portion 14 of the tube 10 to produce the luminescent display on screen portion 16 as is well understood.
The electron guns 12 are preferably disposed in a delta array, as are the individual phosphor elements on the screen as is well known. A partial view of a single electron gun 12 is seen in FIG. 2, and only those elements which are improved per the present invention will be explained in detail since the general gun structure is otherwise conventional.
The electron gun 12 comprises an indirectly heated cathode 18, having an emissively coated end surface 19 from which the electron beam eminates. A first electrode 20 comprises a generally cylindrical body 22, with an end closure portion 24 having a centralized circular aperture 26 therethrough along the electron beam axis. A second electrode 28 is adjacent to the first electrode 20 but spaced therefrom, again along the electron beam axis. The second electrode 28 seen in greater detail in FIGS. 3 and 4, also comprises a cylindrical body portion 30, and an end closure portion 32 having a centralized circular aperture 34 therethrough. The second electrode 28 is oriented with the end closure portion 32 proximate the first electrode, with apertures 26 and 34 aligned for passage of the electron beam.
A third electrode 38 disposed adjacent the second electrode, and includes a reduced diameter cylindrical portion 40 with an end closure surface 42 and an electron beam aperture 44 aligned along the electron beam axis. The third electrode also includes an increased diameter portion 46. A fourth cylindrical electrode is also typically employed, and this is the high voltage electrode of the gun.
A generally rectangular configured projecting ridge 36 is formed in the end closure portion 32 of the second electrode 28. The ridge 36 is formed symmetrical about the aperture 34, and functions as an astigmatic electron lens to produce an elongation of the electron beam in the same direction of elongated side of the rectangular ridge 36. The electron gun is oriented in the picture tube so that the elongated side of the rectangular ridge is oriented with the vertical axis of the tube.
By way of example, the inside diameter of the second electrode cylinder is 0.375 inch. The rectangular ridge formed in the end closure surface measuring from the inside edge of the ridge is about 0.230 inch long on the elongated side, and about 0.015 inch long on the short side of the rectangle. The projecting ridge projects about 0.040 inch from the plane of the end closure surface. The projecting ridge contour is such that the interior side wall is substantially normal to the end closure surface and the exterior sloping side of the ridge is at an angle of about 45 degrees with respect to the end closure plane.
The elongated length of the rectangular projecting ridge is generally preferred to be just less than the inside diameter of the second electrode cylinder diameter. The short side dimension of the rectangular projecting ridge can be readily varied to vary the electron beam elongation. For the example specified above, with a ridge of 0.230 by 0.105 inch, the electron beam at the luminescent screen is elongated in the same direction as the rectangular ridge, and the ratio of the major axis to minor axis of the beam at the screen is 1.17.

The electron beam elongation in the picture tube is in a direction normal to the horizontal electron beam raster and will minimize the ability of the viewer to perceive the raster, since the elongated beam will overlap phosphor areas in the vertical direction.
In prior art astigmatic lens the degree of elongation of the beam was greater, and was produced by defining a lens in which the rectangular lens element had a minor axis which was much shorter than is taught herein. The primary factors determining the degree of electron beam elongation are the diameter of the second electrode circular aperture, the minor axis dimension of the rectangular lens elements, and the height of the lens element above the end closure surface.
The present projecting ridge has a minor axis ridge length which exceeds the ridge projection height by greater than 2 to 1, and is preferably 2.6 to 1. The minor axis ridge length exceeds the diameter of the centralized circular aperture in the second electrode end closure by greater than 3 to 1, and is preferably 3.5 to 1.
The end closure surface of the second electrode in the presently described projecting ridge electron gun component remains in the plane which is at the end of the second electrode cylinder. This facilitates spacing of the first electrode and second electrode in fabricating the electron gun


White-Westinghouse is a home appliance company formed by the acquisition of the Westinghouse Electric Corporation's appliance unit by White Consolidated Industries in 1975.

Westinghouse Electric entered the appliance industry by acquiring Copeman Electric Stove Company in 1917. It moved production from Flint, Michigan to Mansfield, Ohio. Copeman had begun manufacturing its first electric ranges in 1914. Electric ranges were first demonstrated by Thomas Ahearn in 1892, gained in popularity as electrification became widespread throughout the United States.

The company claims to have made several important innovations:

* 1930's refrigerators with sealed refrigeration units
* 1930's room air conditioners
* 1930's portable dishwashers
* 1939 automatic washing machine that was not bolted to the floor.
* 1950's Auto-defrost refrigerators.

The company manufactured both large and small appliances for many years. Currently, appliances bearing the Westinghouse and White-Westinghouse names are made under license from current trademark owner Westinghouse Electric Corporation. They include Electrolux which acquired White Consolidated Industries in 1986.

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