Milestones:Volta's Electrical Battery Invention, 1799 and LP and 45 RPM Records: Difference between pages

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== Volta Battery, 1799<br>[[Image:Milestones-Volta's Electrical Battery.jpg|thumb]]  ==
== The LP and the 45 ==


''In 1799, [[Alessandro Volta|Alessandro Volta]] developed the first [[Batteries|electrical battery]]. This battery, known as the [[Voltaic Pile|Voltaic Cell]], consisted of two plates of different metals immersed in a chemical solution. Volta's development of the first continuous and reproducible source of electrical current was an important step in the study of electromagnetism and in the development of electrical equipment.''
[[Image:Vinyl record LP 10inch.JPG|thumb|right|10-inch LP]]


Alessandro Volta (1745-1827), professor of philosophy at Pavia (1774-1804), contributed much to electrical science. He introduced the theory of electrical current and observed electricity separating water into its component parts of hydrogen and oxygen. Before Volta, it was assumed that electricity was [[Galvani and the Frankenstein Story|generated by living beings]] (animal electricity). He discovered that electricity could be generated chemically and made to flow evenly through a conductor in a closed circuit. He built a battery, known as a Voltaic pile, made of alternating copper and zinc discs, with each pair of metals separated by flannel soaked in weak acid.  
The long playing (LP) record and the 45-rpm disc were two different approaches to high fidelity music, introduced by two different companies in the late 1940s. Since the beginning of the [[Phonograph|phonograph]], most records had played for about two or three minutes. Sometimes [[Mass Producing Records|record companies issued longer recordings on large, 12-inch discs]]. But when the RCA Company began work on an improved disc in the mid-1940s, they stuck to the idea that a record should not have to hold more than one song. In order to make the disc smaller than the 10-inch, 78-rpm discs used since the 1890s, they reduced the speed to 45-rpm and used a much finer groove. This meant that they could pack in more grooves in a smaller space. They used a new plastic material, called vinylite, which resulted in the playing stylus picking up less noise and hiss. World War II interrupted this work, but the new 45-rpm disc and its player were introduced with great fanfare in late 1947.  


Such was his fame that in 1801 he was summoned to Paris by Napoleon who had a special medal struck in Volta's honor. The world has honored Volta by naming the unit of electric potential - the volt - after him.  
At about the same time, CBS Record Company (the successor to [[Columbia Record Company|Columbia Phonograph Company]] established in the early days of the phonograph) introduced its 12-inch, 33 1/3-rpm, long playing record. The development of the LP dates back to 1945, and was the work of CBS research director [[Peter Goldmark|Peter Goldmark]] and other engineers at CBS. It was also made of vinyl plastic, and had very fine grooves, but it was a different size and speed than the 45-rpm and could not be played on the same phonograph without modifications. The LP was not intended to hold short songs like the 45-rpm, but was for classical music, which often ran for 20 minutes or more without a break.  


The Voltaic pile stimulated so much scientific inquiry that, by 1831, when [[Michael Faraday|Faraday]] built the first [[Dynamo|dynamo]], the basic principles of electricity had been established.
[[Image:Sun Records 45s.jpg|thumb|right|Collection of Sun Records 45s]]


The Milestone plaques may be viewed at the Tempio Voltiano, which is a museum in Como,&nbsp;Italy devoted to Volta's achievements, and at Volta's room at Pavia University, Pavia, Italy.
Within a few years, however, most record companies had adopted both the LP and the 45-rpm formats, using the 45-rpm for singles and the LP for classical albums. Engineers easily adapted record players to accommodate both types of discs as well as the older 78-rpm singles. Soon, record companies discovered that the growing popularity of Broadway show tunes and movie soundtracks helped LP sales, because these types of recordings were usually released as sets of discs called albums. These albums (now just a single disc) were so profitable for the record companies that they began releasing more and more popular music on LP rather than as singles. After phasing out the 10-inch, 78-rpm disc around 1958, record companies heavily promoted both the LP and the 45-rpm disc. Sometimes, when songs made famous on the radio were available only on an LP and not a 45-rpm disc, sales of the more expensive LPs could be quite high. The growth of LP sales in the 1960s and 1970s transformed the record business, generating large profits and restoring the industry to the place it had held in the early 1920s before radio was introduced.  


== Map ==
The arrival of the compact disc in the 1980s severely curbed production of LP and 45 discs. Sales of both dropped quickly and most major label record companies stopped releasing them in large amounts by the early 1990s. However, both are still being produced to this day. Vinyl thrives in underground music scenes and niche collector markets, and is still commonly used by DJs for mixing in a live setting. Within the last ten years, vinyl has experienced a minor resurgence in the mainstream, with many of today's top 40 artists issuing their records on vinyl formats with a limited pressing run.


{{#display_map:45.813525, 9.075411~ ~ ~ ~ ~Tempio Voltiano, Guglielmo Marconi, Como, Italy|height=250|zoom=10|static=yes|center=45.813525, 9.075411}}
== Your Surest Selling Job ==


[[Category:Energy|{{PAGENAME}}]]
{{#widget:YouTube16x9|id=DOBeEb8ZY2s</youtube>
[[Category:Electrochemical_devices_&_processes|{{PAGENAME}}]]
 
[[Category:Batteries|{{PAGENAME}}]]
Late 1940s advertisement for new RCA Victrola.
 
[[Category:Engineering and society|Records]] [[Category:Leisure|Records]] [[Category:Music|Records]] [[Category:Consumer electronics|Records]] [[Category:Audio systems|Records]] [[Category:News|Records]]

Revision as of 21:20, 6 January 2015

The LP and the 45

10-inch LP

The long playing (LP) record and the 45-rpm disc were two different approaches to high fidelity music, introduced by two different companies in the late 1940s. Since the beginning of the phonograph, most records had played for about two or three minutes. Sometimes record companies issued longer recordings on large, 12-inch discs. But when the RCA Company began work on an improved disc in the mid-1940s, they stuck to the idea that a record should not have to hold more than one song. In order to make the disc smaller than the 10-inch, 78-rpm discs used since the 1890s, they reduced the speed to 45-rpm and used a much finer groove. This meant that they could pack in more grooves in a smaller space. They used a new plastic material, called vinylite, which resulted in the playing stylus picking up less noise and hiss. World War II interrupted this work, but the new 45-rpm disc and its player were introduced with great fanfare in late 1947.

At about the same time, CBS Record Company (the successor to Columbia Phonograph Company established in the early days of the phonograph) introduced its 12-inch, 33 1/3-rpm, long playing record. The development of the LP dates back to 1945, and was the work of CBS research director Peter Goldmark and other engineers at CBS. It was also made of vinyl plastic, and had very fine grooves, but it was a different size and speed than the 45-rpm and could not be played on the same phonograph without modifications. The LP was not intended to hold short songs like the 45-rpm, but was for classical music, which often ran for 20 minutes or more without a break.

Collection of Sun Records 45s

Within a few years, however, most record companies had adopted both the LP and the 45-rpm formats, using the 45-rpm for singles and the LP for classical albums. Engineers easily adapted record players to accommodate both types of discs as well as the older 78-rpm singles. Soon, record companies discovered that the growing popularity of Broadway show tunes and movie soundtracks helped LP sales, because these types of recordings were usually released as sets of discs called albums. These albums (now just a single disc) were so profitable for the record companies that they began releasing more and more popular music on LP rather than as singles. After phasing out the 10-inch, 78-rpm disc around 1958, record companies heavily promoted both the LP and the 45-rpm disc. Sometimes, when songs made famous on the radio were available only on an LP and not a 45-rpm disc, sales of the more expensive LPs could be quite high. The growth of LP sales in the 1960s and 1970s transformed the record business, generating large profits and restoring the industry to the place it had held in the early 1920s before radio was introduced.

The arrival of the compact disc in the 1980s severely curbed production of LP and 45 discs. Sales of both dropped quickly and most major label record companies stopped releasing them in large amounts by the early 1990s. However, both are still being produced to this day. Vinyl thrives in underground music scenes and niche collector markets, and is still commonly used by DJs for mixing in a live setting. Within the last ten years, vinyl has experienced a minor resurgence in the mainstream, with many of today's top 40 artists issuing their records on vinyl formats with a limited pressing run.

Your Surest Selling Job

{{#widget:YouTube16x9|id=DOBeEb8ZY2s</youtube>

Late 1940s advertisement for new RCA Victrola.