Original file (1,057 × 532 pixels, file size: 35 KB, MIME type: image/png)
Summary edit
| Description |
Automatic Oil Muffle Furnace. A muffle furnace, employed for annealing, hardening, and tempering; the heat being obtained by means of petroleum, which is contained in the tank A, and is kept under pressure by pumping at intervals with the wooden handle, so that when the valve B is opened the oil is vaporized by passing through a heating coil at the furnace entrance, and when ignited burns fiercely as a gas flame. This passes into the furnace through the two holes, C, C, and plays under and up around the muffle D, standing on a fireclay slab. The doorway is closed by two fireclay blocks at E. A temperature of over 2000°F can be obtained in furnaces of this class, and that heat is of course under perfect control. |
|---|---|
| Source |
Encyclopædia Britannica Eleventh Edition, Vol. 2, page 72 |
| Date |
1911 |
| Author |
Encyclopædia Britannica |
| Permission (Reusing this file) |
Public domain
|
Licensing: edit
 | This image is in the public domain in the United States. In most cases, this means that it was first published prior to January 1, 1929 (see the template documentation for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details. |  |
 | This file is a candidate to be copied to Wikimedia Commons.
Any user may perform this transfer; refer to Wikipedia:Moving files to Commons for details. If this file has problems with attribution, copyright, or is otherwise ineligible for Commons, then remove this tag and DO NOT transfer it; repeat violators may be blocked from editing. Other Instructions
| ||
| |||
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:19, 23 October 2008 | | 1,057 × 532 (35 KB) | Eric Shalov (talk | contribs) | {{Information |Description=Automatic Oil Muffle Furnace. A muffle furnace, employed for annealing, hardening, and tempering; the heat being obtained by means of petroleum, which is contained in the tank A, and is kept under pressure by pumping at interval |
You cannot overwrite this file.
