File:Steam indicator (Steam and the Steam Engine - Land and Marine, 1875).jpg

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Summary

Description

Steam indicator of the Richard's type, similar to the later and more commonly seen Dobbie Mc Innes type. Used to accurately measure the performance of steam engines by plotting a graph of pressure against piston position (and thus volume).

Date

c. 1875

Source

Scan from Evers, Henry (1875) Steam and the Steam Engine: Land and Marine, Glasgow: Williams Collins

Author

Andy Dingley (scanner)

Permission
(Reusing this file)

	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).
	This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Dimensions	User	Comment
current	08:03, 4 December 2021	489 × 652 (44 KB)	User-duck	Cropped 3x4 using CropTool with lossless mode.
	17:23, 23 January 2011	640 × 653 (44 KB)	Turbojet	oops, original resolution.
	17:09, 23 January 2011	588 × 600 (38 KB)	Turbojet	cleaning
	17:45, 23 January 2009	640 × 653 (54 KB)	Andy Dingley	{{Scans from 'Steam and the Steam Engine - Land and Marine', 1875 \|description= }} <!--{{ImageUpload\|basic}}-->