US Patent: 45,455
|
Rose Engine
Improved Engine Turning Lathe
|
|
Patentees:
|
| Charles W. Dickinson (exact or similar names) - Newark, Essex County, NJ |
| George Rowden (exact or similar names) - Newark, Essex County, NJ |
|
|
Patent Dates:
|
| Granted: |
Dec. 13, 1864 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Joel Havens
"Vintage Machinery" entry for Dickinson & Rowden
|
|
Description: |
| Thomas P. How-patent attorney
My lathe is designed to be used for the purposes of engraving and of ornamenting jewelry, silverware, &c., and may also be used for engraving dies, for stamping work, for enameling, and for other purposes. It is designed to take the place of the machine known as the " Rose Engine-Lathe," by which these styles of work are usually performed, but which is subject to several disadvantages, one of the most prominent of which is that as the 1 main shaft and its rosettes or patterns with the work to be engraved must all vibrate bodily to wave the line, and the aggregated weight of these being very considerable, their consequent great inertia renders it impracticable to run the lathe at anything more than a very low speed. The vibration of the work or object to be ornamented also renders it difficult i to keep the compound eccentric and tilt-chuck i in complete adjustment, owing to the strain i and wear caused by the constant vibration of these heavy parts when the lathe is in motion. These defects make themselves readily apparent in the quality of the work. This fact will be the more obvious when we confide that the work is exact in its nature, and that a very small deviation from absolute accuracy must therefore, from the nature of the case, make a very easily perceptible difference in the finished engraving. Another important difficulty in the use of : the rose lathe for some kinds of work arises ' from its incapacity to execute the proper vibrations parallel to the surface of the work, when said surface is at an angle between a line parallel with the mandrel of the lathe and another line at right angles thereto. In all such cases the vibration of the work to pro duce the waved line necessarily causes it to approach and recede from the rest which supports the cutting-tool, and as the vibration of the work must necessarily be either in a line parallel to the mandrel or at right-angles to it, this motion to and from the rest is necessarily at some angles very considerable, and involves a corresponding advance and withdrawal of the tool at each vibration. It is obvious that this state of things must necessarily to a certain extent be destructive to the harmony of the design, not only on account of the imperfections resulting- from the alternate advance and withdrawal of the tool, but also in consequence of the fact that the angularity of the surface of the work to the line of motion causes the wave to vary considerably in its form and extent from what it would be were the same motion applied upon a surface parallel to the line of motion. This difficulty is particularly experienced in engraving watchcases while working out over the turn near the periphery. |
|
