File:AEROVANE FAN FROM NORTHWEST. - Consolidation Coal Company Mine No. 11, Aerovane Fan, East side of State Route 936, Midlothian, Allegany County, MD HAER MD,1-MLOTH.V,1B-2.tif

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

Original file ‎(5,000 × 4,035 pixels, file size: 19.24 MB, MIME type: image/tiff)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

AEROVANE FAN FROM NORTHWEST. - Consolidation Coal Company Mine No. 11, Aerovane Fan, East side of State Route 936, Midlothian, Allegany County, MD
Title
AEROVANE FAN FROM NORTHWEST. - Consolidation Coal Company Mine No. 11, Aerovane Fan, East side of State Route 936, Midlothian, Allegany County, MD
Depicted place Maryland; Allegany County; Midlothian
Date Documentation compiled after 1968
Dimensions 4 x 5 in.
Current location
Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA http://hdl.loc.gov/loc.pnp/pp.print
Accession number
HAER MD,1-MLOTH.V,1B-2
Credit line
This file comes from the Historic American Buildings Survey (HABS), Historic American Engineering Record (HAER) or Historic American Landscapes Survey (HALS). These are programs of the National Park Service established for the purpose of documenting historic places. Records consist of measured drawings, archival photographs, and written reports.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

Notes
  • Significance: The aerovane fan illustrates the evolution of mine ventilation in the United States during the first half of the twentieth century. It is an example of an axial flow fan. These fans generally replaced centrifugal fans for mine ventilation because of their small size and their ability to produce high air pressure at slower speeds. These improvements enabled these fans to provide improved mine ventilation and improve health and safety of mine workers. This aerovane fan, typical of mine ventilation fan designs of its period, was patented by Theodore L. Troller.
  • Survey number: HAER MD-87-B
Source https://www.loc.gov/pictures/item/md1332.photos.320036p
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.
Object location39° 38′ 03.01″ N, 78° 57′ 01.01″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

File history

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

Date/TimeThumbnailDimensionsUserComment
current19:35, 28 July 2014Thumbnail for version as of 19:35, 28 July 20145,000 × 4,035 (19.24 MB)Fæ (talk | contribs)GWToolset: Creating mediafile for Fæ. HABS 21 July 2014 (1601:1800)

You cannot overwrite 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:AEROVANE_FAN_FROM_NORTHWEST._-_Consolidation_Coal_Company_Mine_No._11,_Aerovane_Fan,_East_side_of_State_Route_936,_Midlothian,_Allegany_County,_MD_HAER_MD,1-MLOTH.V,1B-2.tif&oldid=774013130"