DE341940C - - Google Patents
Info
- Publication number
- DE341940C DE341940C DENDAT341940D DE341940DA DE341940C DE 341940 C DE341940 C DE 341940C DE NDAT341940 D DENDAT341940 D DE NDAT341940D DE 341940D A DE341940D A DE 341940DA DE 341940 C DE341940 C DE 341940C
- Authority
- DE
- Germany
- Prior art keywords
- precious stone
- stone
- semi
- precious
- production
- 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.)
- Active
Links
- 239000010437 gem Substances 0.000 claims description 11
- 229910001751 gemstone Inorganic materials 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 239000004575 stone Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 2
- 238000005296 abrasive Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052904 quartz Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
- G01R11/12—Arrangements of bearings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sliding-Contact Bearings (AREA)
Description
Verfahren zur Herstellung von Spurzapfen aus Edelstein oder Halbedelstein mit kugeliger Oberfläche, insbesondere für Elektrizitätszähler. Die Erfindung bezweckt, bei der Herstellung von Geräten, insbesondere von Elektrizitätszählern, die Kosten für die Spurlager zu vermindern, in denen ein Edelstein öder Halbedelstein einen Teil des Lagers bilden muß. Für die Erfindung ist vorausgesetzt, da.ß der Stein den als Zapfen wirkenden Teil des Spurlagers bildet. Gegenstand der Erfindung ist ein Verfahren zur Herstellung eines solchen Zapfens: Es kennzeichnet sich dadurch, daß ein Stück Edelsteinoder Halbedelstein bis zur Schmelzgrenze erhitzt. wird. Versuche haben gezeigt, daß der erhitzte Stein bei beginnender Tropfenbildung von selbst eine kugelige Form annimmt, und daß nach dem Wiedererkalten die .Oberfläche des Steines von höchster Glätte ist-. Durch Anwendung des Verfahrens läßt sich also das Schleifen und Polieren einer kugeligen Lauffläche vermeiden. Dies ist nicht allein wegen des Fortfalls des Schleif- und Polierlohnes von Vorteil, sondern ganz besonders wegen der Ersparung der sehr beträchtlichen Kosten des als Schleifmittel benutzten Diamantstaubes.Process for the production of spur cones from precious or semi-precious stone with spherical surface, especially for electricity meters. The invention aims in the manufacture of devices, especially electricity meters, the cost for the thrust bearings, in which a precious stone or semi-precious stone one Must form part of the warehouse. The prerequisite for the invention is that the stone forms the part of the thrust bearing that acts as a journal. The subject of the invention is a process for the production of such a tenon: It is characterized by that a piece of precious stone or semi-precious stone is heated to the melting point. will. try have shown that the heated stone by itself when droplets begin to form assumes a spherical shape, and that after re-cooling the .surface of the The stone is of the highest smoothness. By applying the method can therefore avoid grinding and polishing a spherical running surface. this is not Simply because of the elimination of the grinding and polishing wages an advantage, but entirely especially because of the saving of the very substantial cost of the abrasive used diamond dust.
Zur Ausübung des Verfahrens reicht bei manchen Mineralien, z. B. bei,'Quarz, der hier zu den Halbedelsteinen zu rechnen ist, das Knallgasgebläse aus; bei anderen wird für die' Erhitzung der elektrische Lichtbogen benutzt.For some minerals, such. B. at, 'Quartz, which is to be counted here among the semiprecious stones, the oxyhydrogen blower off; with others the electric arc is used for heating.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE341940C true DE341940C (en) |
Family
ID=571960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT341940D Active DE341940C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE341940C (en) |
-
0
- DE DENDAT341940D patent/DE341940C/de active Active
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