File:DSC00557 - Rotary Snow Plough CN 55361 (48167712272).jpg
![File:DSC00557 - Rotary Snow Plough CN 55361 (48167712272).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/6/6a/DSC00557_-_Rotary_Snow_Plough_CN_55361_%2848167712272%29.jpg/400px-DSC00557_-_Rotary_Snow_Plough_CN_55361_%2848167712272%29.jpg?20200614034341)
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Summary
[edit]DescriptionDSC00557 - Rotary Snow Plough CN 55361 (48167712272).jpg |
English: The rotary snow plough was invented by J. W. Elliot, a Canadian dentist. Used chiefly in the Canadian Rockies, the rotary snow plough could handle any kind of snow on the tracks, in any quantity. A steam engine provided the motive power for its powerful rotating blades. To move forward, the snow plough was pushed by one or two locomotives, also propelled by steam. (The White Pass & Yukon Railway, in Alaska, still uses a steam rotary plough to this day). In Canada, only two rotary snow ploughs of this type are still in existence – this is one of them. Snow has always been a major obstacle faced by railway companies. While wedge ploughs are usually adequate, conditions in the snowiest areas (the Rockies and the Gaspé) call for special equipment.
In 1869, a patent for the Compound Revolving Snow Shovel, which twenty years later became the rotary steam snow plough, was taken out by Toronto dentist J.W. Elliot. His invention led to a first prototype in 1883-84 when the patent was taken over by the American Leslie brothers. Since they were associated with Orange Jull, the device was called the “Elliott-Jull Snow Plow”. Various versions were built until the early 1940s and were used by most North American railway companies and a few French ones. With its ability to move incredible amounts of snow and even smaller tree trunks (flung by avalanches onto the tracks), the “rotary” looked like a roaring beast spitting out its meal. The steam engine that powered its turbine did not provide traction – the plough was pushed by several locomotives. In 1925-26, Arthur Sicard invented the first snowblower by modifying the rotary snow plough’s turbine, giving it the form of an endless screw. All the information used with the pictures was taken from information at the Canadian Railway Museum Site. <a href="http://www.exporail.org/en/collections/our-collection/" rel="noreferrer nofollow">www.exporail.org/en/collections/our-collection/</a> |
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Date | Taken on 22 June 2019, 11:07 | ||||||||||||||
Source | DSC00557 - Rotary Snow Plough CN 55361 | ||||||||||||||
Author |
creator QS:P170,Q122977591
Please see the license conditions. Also, if used outside WMF projects, the photographer would appreciate if you'd let them know |
Camera location | 45° 22′ 35.1″ N, 73° 33′ 50.79″ W ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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Licensing
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This image was originally posted to Flickr by archer10 (Dennis) at https://flickr.com/photos/22490717@N02/48167712272. It was reviewed on 14 June 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
14 June 2020
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current | 03:43, 14 June 2020 | ![]() | 4,000 × 6,000 (22.39 MB) | Rudolphous (talk | contribs) | Transferred from Flickr via #flickr2commons |
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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.
Camera manufacturer | SONY |
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Camera model | ILCE-6300 |
Author | Dennis Jarvis |
Exposure time | 1/200 sec (0.005) |
F-number | f/3.5 |
ISO speed rating | 5,000 |
Date and time of data generation | 11:07, 22 June 2019 |
Lens focal length | 18 mm |
Width | 4,000 px |
Height | 6,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 350 dpi |
Vertical resolution | 350 dpi |
Software used | Adobe Photoshop Elements 17.0 (Macintosh) |
File change date and time | 12:48, 28 June 2019 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.3 |
Date and time of digitizing | 11:07, 22 June 2019 |
Meaning of each component |
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Image compression mode | 5 |
APEX shutter speed | 7.643856 |
APEX aperture | 3.61471 |
APEX brightness | −0.11171875 |
APEX exposure bias | 0 |
Maximum land aperture | 3.6171875 APEX (f/3.5) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 27 mm |
Scene capture type | Standard |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |
Lens used | E 18-200mm F3.5-6.3 OSS LE |
Date metadata was last modified | 09:48, 28 June 2019 |
Unique ID of original document | 08639FFEFBFBEC45118F374D4D5BD6ED |