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Original file ‎(1,803 × 1,357 pixels, file size: 337 KB, MIME type: image/jpeg)

Summary

Description
English: Balance wheel in a cheap 1950s mechanical alarm clock, the Apollo, by Lux Mfg. Co. 2.4 cm diameter. Arrows point to the hairspring (1) and the regulator (2). It has a rate of 4 beats (ticks) or two cycles per second. The clock belongs to me and is still working.
Date
Source Own work
Author Chris Burks Chetvorno

Licensing

Public domain This work has been released into the public domain by its author, I, Chris Burks (Chetvorno). This applies worldwide.
In some countries this may not be legally possible; if so:
I, Chris Burks (Chetvorno) grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Captions

Balance wheel and hairspring in a 1950s alarm clock

Items portrayed in this file

depicts

creator

some value

object has role: photographer
author name string: Chetvorno
Wikimedia username: Chetvorno

copyright status

copyrighted, dedicated to the public domain by copyright holder

copyright license

released into the public domain by the copyright holder

inception

16 June 2007

source of file

original creation by uploader

exposure time

0.05 second

f-number

8

focal length

7.2 millimetre

ISO speed

400

instance of

photograph

MIME type

image/jpeg

checksum

ae169fae27e02a132b8f1bb7d4cdd14438161416

determination method: SHA-1

data size

344,598 byte

height

1,357 pixel

width

1,803 pixel

File history

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Date/TimeThumbnailDimensionsUserComment
current12:53, 19 June 2007Thumbnail for version as of 12:53, 19 June 20071,803 × 1,357 (337 KB)Chetvorno{{Information |Description=Balance wheel in a cheap 1950s mechanical alarm clock, the Apollo, by Lux Mfg. Co. |Source=self-made |Date=June 16, 2007 |Author= Chetvorno }}
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source: https://en.wikipedia.org/wiki/File:Alarm_Clock_Balance_Wheel.jpg

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