File:Topping tool (AM 2004.44.34-15).jpg
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Summary
[edit]Topping tool ( ) | ||||||||||||||||||||||||
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Artist |
Triumph |
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Title |
Topping tool |
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Object type | Classification: 96717 | |||||||||||||||||||||||
Description |
English: Wheel topping tool, Triumph, with cutters brass and steel mechanical tool on rectangular wooden base with drawer. Large wheel on right hand side with wooden handle, rotates shaft which then rotates smaller wheel. Various screws and rods extending from tool. Drawer holds 17 cutters of differing gauge and 2 metal stakes. This machine has been set up with a wheel and cutter in position to show the action. A topping or rounding off tool. These machines were used for slightly reducing the diameter of and-or truing up wheels which were not running true. They were also used for shaping the teeth of wheels which were being made. After radial slots had been cut into the outside of a wheel, leaving square-shaped teeth around the circumference, the topping tool, used with appropriate sized and shaped cutter, shaped the ends of the teeth to the correct curvature. The selected cutter, of the exact shape of the required space between two adjacent teeth, had an adjustable part offset to one side, set so that it entered the space between the next two teeth of the wheel. With each revolution it pulled the next two teeth of the wheel into position to be shaped. Each revolution of the cutter advanced the wheel by one tooth. |
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Date |
circa 1920 date QS:P571,+1920-00-00T00:00:00Z/9,P1480,Q5727902 ; 20th century; 21 May 2004; 06 May 2004 |
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Dimensions |
width: 360mm |
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Collection |
institution QS:P195,Q758657 |
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Accession number |
2004.44.34 |
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Place of creation | not researched | |||||||||||||||||||||||
Credit line | Collection of Auckland Museum Tamaki Paenga Hira, 2004.44.34 | |||||||||||||||||||||||
Notes | Museum Tag: Collections Hub | |||||||||||||||||||||||
Source/Photographer | Photo | |||||||||||||||||||||||
Permission (Reusing this file) |
This image has been released as "CCBY" by Auckland Museum. For details refer to the Commons project page. | |||||||||||||||||||||||
Other versions |
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Licensing
[edit]This file is licensed under the Creative Commons Attribution 4.0 International license.
Attribution: Auckland Museum
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:35, 26 January 2018 | 4,000 × 3,000 (2.51 MB) | Fæ (talk | contribs) | Auckland Museum Page 240.74 Object #24073 2004.44.34 Image 15/15 http://api.aucklandmuseum.com/id/media/v/110944 |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot G9 |
Exposure time | 1/10 sec (0.1) |
F-number | f/2.8 |
ISO speed rating | 100 |
Date and time of data generation | 15:25, 27 June 2008 |
Lens focal length | 7.4 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 15:25, 27 June 2008 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 15:25, 27 June 2008 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 3.3125 |
APEX aperture | 2.96875 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 13,745.704467354 |
Focal plane Y resolution | 13,698.630136986 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |