File:Spring weighing scale.jpg

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DescriptionSpring weighing scale.jpg	English: This weighing scale measures the weight of an object using an internal spring and its known spring constant. It can be affixed to a stationary object by the hook on top, while an unknown weight hangs by the hook on the bottom, deflecting the spring and moving the weight indicator along the graduated scale printed on the spring housing. A knob on the side of the spring housing allows the user to calibrate the weighing scale to zero. This sort of scale can also be used to measure any force in any direction transmitted through the scale. Source: http://www.hq.nasa.gov/alsj/tools/judy58.jpg
Date	March 1989
Source	Catalog of Apollo Lunar Surface Geological Sampling Tools and Containera p.38, Judith Haley Allton, Lockheed Engineering and Sciences Company, Houston, Texas (direct link)
Author	NASA

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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Date/Time	Dimensions	User	Comment
2004-10-18 00:27	390×708× (63147 bytes)	Ke4roh	Source: http://www.hq.nasa.gov/alsj/tools/judy58.jpg {{PD-USGov}}

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