How to use

On this site you will find pictures and information about some of the electrical , electrotechnical and mechanical technology relics that the Frank Sharp Private museum has accumulated over the years .
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
Under The Ice 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 FREON12MUSEUM site:

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or you can click on the main photo-page to start from the main page. If 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, reaching the bottom end of each page then click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the right 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, with 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 !

" In the world of 2000's , if we need a cold drink we might go to the refrigerator for a few ice cubes or if there is a fancy model of refrigerator available, then we might have ice water right on tap! Things weren’t always like this however, that is before modern refrigeration.

Chilling has been known for centuries as a preservative for
perishable foods. A preservative, which was only accessible in places, where people could obtain ice during the winter. In practice, ice from lakes and rivers were cut in blocks and stored in heavily insulated rooms or pits from which it was retrieved when needed for cooling.
By use of the mechanical refrigeration, cold production became easier, because the ice could now be manufactured artificially. Now ice factories popped up, where blocks of ice were produced in large-scale operations and delivered to dairies, from which the consumer could fetch ice. The ice was placed in an ice box at home in the kitchen in which it melted and cooled the contents. The principle sounds old-fashioned, but the method was actually used up until the mid-1900s.
Gradually it became possible to produce the refrigerator systems so relatively small that they could be moved to where the cold was to be used. This meant, for example, that a refrigerator system could be placed in the basement and from there the refrigerant was circulated to insulated cabinets placed in the apartments.
Danfoss supplied expansion valves to control the temperature in these refrigeration systems. The expansion valve was Danfoss’ first, largest, and most important product.

In the world of 1810 in Cuba, the ice for our iced drink would need to be imported from the New England states at more than 500 dollars per the ton – that’s a lot of 1810 money! Obviously ice is a very important thing if Boston, at the same time, exported approximately 65,000 tons of ice per year; this is before mechanical refrigeration. Ice traditionally has been very important not only in good drinks, but it has also been critical to hospitals. It is then appropriate that a doctor, Scottish Dr. John Gorrie, received the first patent for mechanical refrigeration in 1842 to help his feverish patients.

After the advent of mechanical refrigeration, the need for ice shipped from temperate climates began to drop10. By 1855 the man made ice was being used in breweries and meat plants, but the new ice machines weren’t without problems. First, the refrigerant of choice for the 19th century ice machine is ammonia, which has the drawbacks of being highly toxic, corrosive, and difficult to compress.

The net result is that the ice machines were massive (as big as a typical kitchen), steam powered (the best source of energy in the 19th century for large equipment – needing constant boiler attendance), required a lot of maintenance and were the source of industrial accidents. An alternative had to be found!

Chemists, on the job, made a technological breakthrough: Sulfur dioxide is compressed readily and has a good latent heat* of 25 kJ/mol

Chemists and physicists were able to put a kitchen sized version of the refrigerator on the market after World War One.

Unfortunately, sulfur dioxide isn’t the most pleasant refrigerant: Early refrigerators leaked and if they didn’t, sulfur dioxide is corrosive, so they soon would. Additionally, sulfur dioxide is noted for its odor.

These early refrigerants were just not satisfying the public: they wanted something that would not stink up the house, burn it down, or kill them outright! It is with this criterion in mind that Frigidaire Division of GM set out to come up with a solution. They appointed Robert McNary, Thomas Midgley and Albert Henne to the task of finding performing, inert refrigerants for use in the household. It is this team that discovered dichlorodifluoromethane as a refrigerant in 1928 ."

By the late 1930's the North American refrigeration industry was moving rapidly to the adoption of fully "hermetic" systems, in which the motor and compressor where sealed in a single steel dome, which was connected to the evaporator in a seamless, integrated design not requiring the services of a skilled, field, refrigeration mechanic. The fully hermetic design for the household cabinet refrigerator was the next evolutionary step towards improving performance, reliability and life expectancy, all of which would increase dramatically. Kelvinator made significant contribution to the development of hermetic system design, Kelvinator of Canada, Circa 1955

Technical Significance
The change in performance, reliability and life expectancy which accompanied the wing to hermetic design could scarcely be over estimated. The period of regular motor oiling, drive belt replacement and leaking compressors and tubing connectors was gone. The operating life expectancy of such systems was all of a sudden 20 years or more.

Many contemporary appliances 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 our deliberately designed to fail or manufactured with limited edition specificities.

.......The bitterness of poor quality is remembered long after the sweetness of todays funny silly crap gadgets low price has faded from memory.....

Every OLD Refrigerator saved let revive knowledge, thoughts, Cool engineering, noises, moments of the past life which will never return again.........

Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

Have big FUN ! !

©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 !

Saturday, September 1, 2012


The REFRIGERATOR COMPRESSOR ELECTROLUX OF1033A  have had a defective windings therefore it was replaced an this here today opened for the WEB. (Happy grinding..........).

These compressors have been successfully used in mass volumes in the market since their introduction in 1992. Electrolux Compressor Companies were the first to present this new range of compressors for household appliances, providing a prompt answer to solve the ozone depletion problem

REFRIGERATOR COMPRESSOR ELECTROLUX (VERDICHTER OE) OF1033A Compressor with hermetically sealed casing:

An electric compressor, particularly for household refrigerators, comprising an outside casing (1), an inside body (2), a cylinder head (3), a silencer (4) interposed between the cavity inside the compressor casing and the gas inlet pipe within the cylinder head (3), wherein the silencer (4) is substantially L-shaped, the greater side containing the expansion chamber (5) and the lesser side leading to the gas admission port (7) in the inlet valve and then to the outlet pipe (9) toward a Helmholtz resonator, the Helmholtz resonator being formed in the compressor body. The ratio between the area of the admission pipe (6) and the transverse section of the chamber (5) must be approximately 0.03, and the length of the chamber (5) must be approximately 34 mm.

1. An electric compressor, particularly for household refrigerators, comprising an outside casing (l), an inside body (2), a cylinder head (3), a silencer (4) interposed between the cavity inside the compressor casing and the gas inlet passage within the cylinder head (3), characterized in that in the chamber (5) inside the silencer (4) the ratio between the area of the admission pipe (6) and the transverse section of the chamber (5) is approximately 0.03, and the length of the chamber (5) is approximately 34 mm, the silencer (4) is substantially L-shaped, whereby the greater side contains the expansion chamber (5) and the gas admission pipe (6) into the chamber, and the lesser side constitutes the gas outlet pipe (8) from the chamber (5) and that the lesser side leads first to the gas admission port (7) in the inlet valve and then to the outlet pipe (9) toward a Helmholtz resonator.

2. The compressor of claim 1, characterized in that the Helmholtz resonator is formed within the compressor body.

3. The compressor of claims 1 or 2, characterized in that the expansion chamber (5) has two substantially parallel plane opposing walls and two curved opposing walls with the same direction and substantially the same angle of curvature.

4. The compressor of the preceding claim, characterized in that the silencer (4) has a constructional shape similar to a hook where the outlet pipe (9) is placed on the end-portion of said hook.

5. The compressor of any of the above claims, characterized in that the silencer (4) performs the function of reducing noise within an adiabatic change.

The present invention relates to a special form of inlet pipe for cooling gas inside an airtight enclosure containing an electric compressor, particularly employed in refrigerators for household use.
For better illustration of the present invention it is assumed that the pipe operates in close association with the compressor and that it is made of injection-molded or stamped plastic. This naturally does not limit the invention to this type of material and to this connection.
The fluctuations of gas pressure inside displacement compressors particularly for household refrigerators are of considerable importance in view of their influence on the efficiency and the level of acoustic power emitted by the compressors. Therein the cooling gas coming from the inlet pipe enters inside the airtight housing of the compressor.
The body of the compressor has an inlet pipe inside the casing connected to the inlet valve via various channels and cavities that permit the drawn-in gas to be conveyed inside the cylinder.
Being in contact with all the hot surfaces of the compressor, the gas heats up and reduces its density during these passages.
This leads to a reduction in the cylinder filling and thus ultimately to a reduction in the cooling capacity of the compressor.

The basic mechanisms regulating the dynamics of the gas movements are as follows.

  • 1) The mechanism of restriction of flow through each "collar" and each connecting cavity constituting the system is regarded as an opening constricting the flow of gas. This effect is of virtually static character since the inertia of the gas is low, normally negligible, in the inlet and outlet passages which have reasonable dimensions.
  • 2) The second mechanism is essentially of a dynamic nature, relating to the sudden opening and closing of the inlet and outlet valves. The sudden discharge of an amount of gas inside a cavity of the system causes an acceleration in the mass of the gas already existing in the passages downstream of the cavity, thus permitting the arriving gas to alter its thermodynamic characteristics minimally. The inertia of the gas offers resistance to this variation of motion and results in a pressure increase inside the cavity. Once this change of state has been established the gas persists in its motion (due to inertia), producing a rarefaction of gas in the cavity in which there was previously an overpressure. The repetition of this process, as is characteristic of reciprocating displacement compressors, produces a vibration of the gas. From the point of view of efficiency alone, the ideal solution would be the total elimination of any system of pipes, manifolds and cavities that have the function of collecting the gas upstream and downstream of the automatic valves.
    However, maximizing thermodynamic efficiency in this way would accordingly increase the level of acoustic power emitted, particularly during intake, that is transmitted directly outside the casing of the compressor, thereby compromising the requirements of quietness.
    It would therefore be desirable, and is the object of the present invention, to realize a compressor that combines high efficiency with low noise, and is reliable, economical and easy to assemble while using materials and techniques permitted by the state of the art.
    This object is achieved with the device described, by way of example and nonrestrictively, with reference to the adjoined figures in which:
    Fig. 1
    shows a view of the inside of the compressor casing with the device shown from the front, comprising a silencer interposed between the intake of the gas from outside of the compressor and the cylinder head;
    Fig. 2
    shows a front inside view of the cover of the silencer;
    Fig. 3
    shows a lateral view of the same detail;
    Fig. 4
    shows a front inside view of the body of the silencer;
    Fig. 5
    shows a lateral section of the same detail.
    The essential idea of the invention is described here as follows.
    In order to maintain the process of gas intake within an adiabatic change (thereby preserving the cooling efficiency of the compressor), the acoustic control system is preferably made of plastic material.
    An expansion silencer is realized between two pipes (having different sections) and by a Helmholtz resonator whose collar is positioned along the pipe at the outlet of the silencer on the side of the inlet valve.

    Inside the silencer the spread of the acoustic waves is subject to interference and reflection phenomena that attenuate their acoustic intensity (understood to be the energy flow per unit of area).
    Experiments have shown the transfer function of this component (understood to be the relation between an acoustic signal at the input and an acoustic signal at the output) when the silencer is subjected to an accidental-type acoustic signal, in static states and in air. The silencer has been found to be a low-pass acoustic filter, equipped with two resonances f1 and f2 (see Fig. 6).

     The attenuation of the acoustic intensity to resonant frequencies f1 and f2 is obtained by means of the Helmholtz resonator.
    It is known that in systems composed of several weakly coupled components (silencer and resonator) the (generally complex) resonant frequencies are divided and shifted along the axis of the frequencies of a known range, so that one frequency is higher and one is lower than the frequency of the unmodified system.
    Thus, if a resonator is applied to a cavity (and tuned to have the same natural frequency as an acoustic mode of the cavity), two new coupled modes are produced whose natural frequencies are disposed on the sides of the original frequency. The separation between the frequencies is proportional to the value of the coupling parameter.
    To obtain good results with this type of coupling it is necessary to optimize the volume of the resonator in accordance with the volume of the cavity and also the position of the resonator neck, which must be located near a loop of the acoustic mode to be attenuated to a greater extent. It is therefore necessary to apportion these parameters to obtain a reduction of acoustic pressure at the starting frequency, whereby the reduction should be considerable but not excessive so as not to be compensated by a considerable increase of acoustic pressure to the two new frequencies that will be produced.
    It is furthermore stressed that there is no flow of gas through the resonator cavity. Since there is thus no variation in the gas temperature due to the interposed cavity, the efficiency characteristics of the thermodynamic cycle are maintained unchanged.

    The gas entering the compressor and coming from the inlet pipe is not dispersed in the casing to be then drawn into the inlet pipe present in the compressor body, but is immediately "intercepted" and directed toward the head without being allowed to spread.
    For this purpose a silencer is designed and mounted for guiding the path of the gas and connecting on one side the area facing the gas entry port in the casing, and on the other side the inlet port in the cylinder head. The separation which the flow of gas thus undergoes and the particular path that develops achieve the result of preventing the gas from overheating and of blocking the intake noise within the pipe.

    The features of the invention are specified in the claims that follow.
    Referring to the figures we can see the following components:
  • 1) compressor casing
  • 2) compressor body
  • 3) cylinder head
  • 4) silencer, seen from its cover
  • 5) expansion chamber of silencer
  • 6) gas entry pipe into chamber 5
  • 7) gas admission port in inlet valve
  • 8) gas outlet pipe from chamber 5
  • 9) outlet pipe to Helmholtz resonator Connected to head 3 of the compressor cylinder is intake silencer 4 made of plastic material, with gas entry port 6 and gas outlet pipe 8 from chamber 5, followed by port 7 toward the gas inlet valve in the head.

    The cooling gas in pipe 6 enters chamber 5 inside silencer 4.
    The silencer is interposed between the cavity inside the compressor casing and the gas inlet pipe within cylinder head 3, and is substantially L-shaped, whereby the greater side, widened at the center and virtually box-shaped, contains expansion chamber 5 and gas admission pipe 6 into the chamber, and the restriction of the lesser side constitutes gas outlet pipe 8 from chamber 5.
    After the restriction the lesser side leads first to gas admission hole 7 in the inlet valve and then to outlet pipe 9 toward a Helmholtz resonator, consisting of a suitable cavity formed within the compressor body.
    Expansion chamber 5 can have different forms, but preferably has two substantially parallel plane opposing walls and two curved opposing walls with the same direction and with substantially the same angle of curvature.
    Chamber 5 can also have different forms provided that the following proportions are maintained between some critical dimensions.

    The ratio between the area of admission pipe 6 and the transverse section of chamber 5 must be approximately 0.03.
    Furthermore the length of cavity 5 must be approximately 34 mm.
    In order to maintain the process of gas intake within an adiabatic change (thereby preserving the cooling efficiency of the compressor), the silencer is preferably made of plastic material.
    It is understood that what has been said and shown with reference to the adjoined drawings is intended only to exemplify the invention, and that numerous variants and modifications may be produced without departing from the present invention as defined in the claims.

  • The compressor was originally designed by Bosch (Germany)
    Verdichter Oe  in Fürstenfeld, Austria., the  largest producer of refrigeration compressors in the world with an annual production of 21 million compressors in its seven plants located in four continents.

    Verdichter Oe History

    1982 Project initiated by the Zanussi Group for a factory near Fürstenfeld, Austria, with the capacity of 1 million compressors per year. The name of the factory, "Verdichter", is the German word for "compressor".
    1983 Start of production in one shift
    1984 Start of production in two shifts
    1986 Change of ownership (Electrolux Group buys Zanussi)
    1988 Start of production in three shifts
    1990 Production decrease (Massacre on Tian'anmen Square, less exports to China)
    1994 Restart of production in three shifts
    1995 Start of Flexible Shift System (including Saturday morning shift)
    1996 Start of "Kappa" Project (Development of a new generation of compressors)
    1998 Start of production 6 days x 24 hours a week
    1999 Enlargement of factory buildings for Kappa production line

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