This image is in the public domain because it is a mere mechanical scan or photocopy of a public domain original, or – from the available evidence – is so similar to such a scan or photocopy that no copyright protection can be expected to arise. The original itself is in the public domain for the following reason:
Public domainPublic domainfalsefalse
این اثر در ایالات متحده آمریکا در مالکیت عمومی قرار دارد به این دلیل که قبل از ۱ ژانویهٔ ۱۹۲۹ منتشر یا در ادارهٔ حق تکثیر آمریکا ثبت شدهاست.
آثار ماکلیت عمومی میبایست خارج از حق تکثیر هم در آمریکا و هم در کشور مبدأ اثر باشند تا بتوانند در ویکیانبار قرار بگیرند. اگر اثر، اثر ایالات متحده آمریکا نباشد، پرونده میبایست یک برچسپ حق تکثیر اضافی داشته باشند که وضعیت حق تکثیر را در کشور مبدأ مشخص کند.
This tag is designed for use where there may be a need to assert that any enhancements (eg brightness, contrast, colour-matching, sharpening) are in themselves insufficiently creative to generate a new copyright. It can be used where it is unknown whether any enhancements have been made, as well as when the enhancements are clear but insufficient. For known raw unenhanced scans you can use an appropriate {{PD-old}} tag instead. For usage, see Commons:When to use the PD-scan tag.
Note: This tag applies to scans and photocopies only. For photographs of public domain originals taken from afar, {{PD-Art}} may be applicable. See Commons:When to use the PD-Art tag.
Public domainPublic domainfalsefalse
This work is based on a work in the public domain. It has been digitally enhanced and/or modified. This derivative work has been (or is hereby) released into the public domain by its author, Gazebo. This applies worldwide.
In some countries this may not be legally possible; if so:
Gazebo grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
{{Information |Description ={{en|1=A cutaway diagram of a Lamneck central heating gas furnace.}} |Source =[http://books.google.com/books?id=TysyAQAAMAAJ ''Report of the Househeating Committee''], American Gas Institute, 1917, pg. 15 on {{w|G...
این پرونده حاوی اطلاعات اضافهایست که احتمالاً دوربین دیجیتال یا پویشگری که در ایجاد یا دیجیتالی کردن آن به کار رفته آن را افزوده است. اگر پرونده از وضعیت ابتداییاش تغییر داده شده باشد آنگاه ممکن است شرح و تفصیلات موجود اطلاعات تصویر را تماماً بازتاب ندهد.
توضیحات پرونده PNG
This image of a Lamneck central heating gas furnace is from the Google Books edition of the book "Report of the Househeating Committee," American Gas Institute, 1917, pg. 15. More information about this book is available at <http://books.google.com/books?id=TysyAQAAMAAJ> on the Web. This image was retouched by the Wikimedia Commons user Gazebo <http://commons.wikimedia.org/wiki/User:Gazebo> and these modifications have been dedicated to the public domain. The original image out of copyright in the US. Foreign copyrights may apply.