File:Perforator.png

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(1,203 × 620 pixels, file size: 977 KB, MIME type: image/png)

Captions

Captions

Perforator for producing punched paper tape for sending morse code.

Summary[edit]

Description
English: Perforator apparatus for producing punched paper tape that was used to control an automatic wireless telegraphy transmitter. This was used at the Telefunken station at Sayville, Long Island. See w:Wheatstone system.
Original caption: "The perforator in which a paper strip is unrolled at any desired speed and punctured by small holes; the separation between holes representing either the dots or dashes produced by an ordinary telegraph key."
Date
Source (July 1913). "The High Power Telefunken Radio Station at Sayville, Long Island". Proceedings of the Institute of Radio Engineers 1 (3): 23–35. DOI:10.1109/JRPROC.1913.216587.
Author Fritz Van Der Woude and Alfred E. Seelig

Licensing[edit]

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Perforator.png

File history

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

Date/TimeThumbnailDimensionsUserComment
current16:10, 30 December 2019Thumbnail for version as of 16:10, 30 December 20191,203 × 620 (977 KB)Mu301 (talk | contribs)User created page with UploadWizard

You cannot overwrite this file.

There are no pages that use this file.

File usage on other wikis

The following other wikis use this file:

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:Perforator.png&oldid=384775125"