File:BraytonEngineLitho.jpg

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Description
English: Early Brayton engine lithograph taken from Dugald Clerk's 1886 book "Oil and Gas Engines" - available without copyright on the internet. The image probably dates to 1873, but even if that is incorrect then Dugald Clerk died in 1932 hence categorised as : .
Date 24 November 2011 (original upload date)
Source Own work by the original uploader
Author

Early Brayton engine lithograph taken from Dugald Clerk's 1886 book "Oil and Gas Engines" - available without copyright on the internet. The image probably dates to 1873, but even if that is incorrect then Dugald Clerk died in 1932 hence categorised as :

Licensing

Public domain

This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer.


You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).

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This engine is the original gas engine (not gasoline), and most later engines were liquid fuelled. It is unlike any working engines before, and unlike most piston engines since. The following account from Dugald Clerk summarises its action :

"In this engine there are two cylinders, compressing pump and motor. The charge of gas and air is drawn into the pump on the out-stroke and compressed on the return into a receiver ; the pressure usual in the receiver varies from 60 to 80 Ibs. per square inch above atmosphere. The motor cylinder takes its supply from the receiver but the mixture is ignited as it enters, a grating arrangement preventing the flame from passing back; the mixture, in fact, does not enter the motor cylinder at all ; what enters it, is a continuous flame. At a certain point the supply of flame is cut off and the piston, moving on to the end of its stroke, expands the volume, of hot gases to nearly atmospheric pressure before discharge."

Original upload log

Transferred from en.wikipedia to Commons using For the Common Good.

The original description page was here. All following user names refer to en.wikipedia.
Date/Time Dimensions User Comment
00:17, 24 November 2011 597 × 684 (135,005 bytes) w:en:Oldnoccer (talk | contribs) Early Brayton engine lithograph taken from Dugald Clerk's 1886 book "Oil and Gas Engines" - available without copyright on the internet. Even if that is incorrect then Clerk died over 75 years ago hence categorised as {{PD-old-70}}. This engine is the or

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current00:56, 26 April 2015Thumbnail for version as of 00:56, 26 April 2015597 × 684 (132 KB)Andy DingleyTransferred from en.wikipedia: see original upload log above
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