Jump to content

File:Balance spring types.png

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

Original file (1,540 × 313 pixels, file size: 27 KB, MIME type: image/png)

Summary

Description
English: Drawings of different types of watch and chronometer balance springs. Types: (1) flat spiral, including central collet and end stud, (2) Breguet overcoil, (3) chronometer helix, with axial view showing Breguet end curves, (4) early forms. The early springs are from Nelthropp, others are from Britten. Alterations: combined source images into a composite, removed captions and part labels, scaled and rotated Nelthropp image to match others, added new labels in color, converted to PNG.
Date and 1898
Source downloaded from Britten, Frederick J. (1898) On the Springing and Adjusting of Watches, Spon & Chamberlain, p.6-7, figs.2,3,4 and Nelthropp, Harry L.(1873) A Treatise on Watch-work, Past and Present, E.& F.N. Spon, London, p.187, fig.19 on Google Books
Author Frederick J. Britten and Harry L. Nelthropp
Permission
(Reusing this file)		 Public domain - Britten died in 1913

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

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

media type

image/png

checksum

6d4b3c29b59f29d91fdec265ea1a5ed13359e93f

determination method or standard: SHA-1

data size

27,462 byte

height

313 pixel

width

1,540 pixel

File history

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

Date/TimeThumbnailDimensionsUserComment
current15:59, 5 December 2007Thumbnail for version as of 15:59, 5 December 20071,540 × 313 (27 KB)Chetvorno{{Information |Description=Drawings of different types of watch and clock balance springs. Types: (1)flat spiral, with central collet and end stud, (2)Breguet overcoil, (3)chronometer helix, with axial view showing Breguet end curves, (4)early forms. Th

The following page uses this file:

Global file usage

The following other wikis use this file:

Retrieved from "https://en.wikipedia.org/wiki/File:Balance_spring_types.png"