US208269A - Improvement in dressing millstones - Google Patents
Improvement in dressing millstones Download PDFInfo
- Publication number
- US208269A US208269A US208269DA US208269A US 208269 A US208269 A US 208269A US 208269D A US208269D A US 208269DA US 208269 A US208269 A US 208269A
- Authority
- US
- United States
- Prior art keywords
- stones
- stone
- dressing
- improvement
- pumice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000004575 stone Substances 0.000 description 64
- 235000013339 cereals Nutrition 0.000 description 10
- 239000008262 pumice Substances 0.000 description 10
- 238000000227 grinding Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 210000000481 Breast Anatomy 0.000 description 2
- 210000002816 Gills Anatomy 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000003628 erosive Effects 0.000 description 2
- 230000004301 light adaptation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
- B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
Definitions
- burr-stone for milling purposes it occasionally becomes necessary to redress the grinding-faces of the stone. This has been done in various ways, as by face cracking or roughenin g such surface, or scoring or cutting it with a suitable tool or a diamond.
- One of the principal objects in view in such redressing is to remove a glaze or glit which the face of the stone acquires in use, and leave the clean natural grit of the stone.
- pumice stone The article best answering the requirement of the case I have found to be what is commonly known as pumice stone, and the'manner in which I prefer to use the same is as follows:
- the stones being adjusted, say, as for ordinary grinding, and preferably while running at a comparatively slow rate of speed, I feed to them a small quantity of pumice-stone, preferably in granulated form, say, about one or two gills, more or less, according to the size of the stones and their condition.
- pumice-stone preferably in granulated form, say, about one or two gills, more or less, according to the size of the stones and their condition.
- the dressing may be said to be done automatically, or the stones may be said to dress themselves.
- the pumice-stone in granulated form, as mentioned, the granules or grains approximating in size the grains of cereals usually ground.
- the pumice may be used, however, in powdered form, and, especially when the upper stone has been lifted for any cause, the powdered pumice maybe spread on the bed-stone, and when the upper stone is replaced the dressing may be effected by running the stones substantially as before described.
- This method of dressing the stones is equally applicable whether the grinding-faces or lands are smooth or more or less roughened. In either case it leaves the clean natural grit of the stones in the best possible condition for work.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Description
UNITEDSTATES PATENT QFFICE.
BENJAMIN n. SANDERS, or WELLSBURG, WEST VIRGINIA.
IMPROVEMENT IN DRESSING MILLSTONES.
Specification forming part of Letters Patent No. 208,269, dated September 24, 1878; application filed July 31, 1878.
To all whom it may concern:
Be it known that I, BENJAMIN D. SANDERS, of Wellsburg, county of Brooke, State of West Virginia, have invented or discovered a new and useful Improvement in Dressing Millstones; and I do hereby declare the following to be a full, clear, concise, and exact description thereof.
In the use of burr-stone for milling purposes it occasionally becomes necessary to redress the grinding-faces of the stone. This has been done in various ways, as by face cracking or roughenin g such surface, or scoring or cutting it with a suitable tool or a diamond.
In all such cases it is necessary to lift or remove the upper stone which occasions delay and expense, and the services of a skilled workman must also be employed.
One of the principal objects in view in such redressing is to remove a glaze or glit which the face of the stone acquires in use, and leave the clean natural grit of the stone.
I have experimented at considerable length and in various ways to discover, if possible, some cheaper and better way of removing this glaze from the stones, and as a result of such experiments I have found that the desired end can be most effectually gained by the use of a stone or mineral substance which will readilypulverize into very fine grains, but will also, when so pulverized, have more or less erosive qualities or adaptation to or capacity for removing this objectionable glaze.
The article best answering the requirement of the case I have found to be what is commonly known as pumice stone, and the'manner in which I prefer to use the same is as follows: The stones being adjusted, say, as for ordinary grinding, and preferably while running at a comparatively slow rate of speed, I feed to them a small quantity of pumice-stone, preferably in granulated form, say, about one or two gills, more or less, according to the size of the stones and their condition. These granules or grains will be caught and easily crushed in the bosom of the stones, and as they are reduced and carried toward the skirt or periphery I lower the upper stone somewhat until the grinding-faces are in close relation, such as would be given for very fine grinding. This operation is continued for a little time, say, for one or two minutes, when under ordinary conditions the desired result will be attained, and upon readj usting the stones they will be again ready for use. During this operation the pulverized pumice Spreads evenly and uniformly over the surface of the burrs or stones, and its effect is to cut away or remove the glaze or glit which the stones may have acquired, leavin g instead the clean natural grit of the stones, in which condition they are best adapted for good work in grinding.
In this operation the dressing may be said to be done automatically, or the stones may be said to dress themselves.
By the use of this material, as described, I accomplish a superior result without lifting or removing the stones from place, and with littleloss of time. At the same timethe knowledge and skill required are only such as are possessed by millers generally.
For convenience in feeding, I prefer to use the pumice-stone in granulated form, as mentioned, the granules or grains approximating in size the grains of cereals usually ground.
The pumice may be used, however, in powdered form, and, especially when the upper stone has been lifted for any cause, the powdered pumice maybe spread on the bed-stone, and when the upper stone is replaced the dressing may be effected by running the stones substantially as before described.
While I consider pumice stone the best adapted for effecting a dressing of the stones in the way described, yet I include herein as coming within my invention, and as the mechanical equivalent of such stone, any stone or mineral which being passed between the stones or burrs while running will effect the desired dressing of the grinding-faces.
This method of dressing the stones is equally applicable whether the grinding-faces or lands are smooth or more or less roughened. In either case it leaves the clean natural grit of the stones in the best possible condition for work.
I am aware that it has been proposed to use common sand for the purposes above indicated; but my experience has been that sand is unsuited to the purpose and will not give In testimony wherrof I here hereunto set good results. Hence the use of the same is my hand. hereby diselainied.
I claim as my invention BEN J AKIN D. SANDERS. The process herein described 0f automatically dressing millstone 0r burr-stones-nztme- Witnesses: 1y, subjecting them while running to the ac- J. J. MCCORMICK, tion of pumice-stone, granulated 0r powdered, OLAUDIUS L. PARKER. substantially as described.
Publications (1)
Publication Number | Publication Date |
---|---|
US208269A true US208269A (en) | 1878-09-24 |
Family
ID=2277674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US208269D Expired - Lifetime US208269A (en) | Improvement in dressing millstones |
Country Status (1)
Country | Link |
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US (1) | US208269A (en) |
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0
- US US208269D patent/US208269A/en not_active Expired - Lifetime
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