US1636282A - Method of manufacturing electric insulators - Google Patents
Method of manufacturing electric insulators Download PDFInfo
- Publication number
- US1636282A US1636282A US60556A US6055625A US1636282A US 1636282 A US1636282 A US 1636282A US 60556 A US60556 A US 60556A US 6055625 A US6055625 A US 6055625A US 1636282 A US1636282 A US 1636282A
- Authority
- US
- United States
- Prior art keywords
- insulator
- porcelain
- cavity
- filling
- baking
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
- Y10S264/54—Processes in making insulators
Definitions
- Serial No My invention relates to improvements in I the method of manufacturing electric insulators.
- the manufacture of electric insulators presents the difliculty that when baking the porcelain body inner tensions are produced, which cause cracks and other deformations interfering with the insulating capacity. Therefore the porcelain bodies are constructed as far as possible with walls of uniform thickness, which, however, is not al- Ways possible in all the parts of the body. For obtaining walls ofuniform thickness cavities are provided in the thicker portions of the body. But in this method the air confined within the cavities is expanded by heat when baking the bodies, so that a high pressure is exerted on the walls which pressure forces the walls outwardly and produces objectionable passages and other deformations reducing the strength of the porcelain body and the insulating capacity thereof.
- these objections are obviated by filling the cavity or cavities provided within the insulating body with insulating matter having a very small coeflicient of shrinkage or expansion, or having a coeflicient of expansion equal or substantlally equal to the coefiicient of expension of the material of the insulating body.
- the insulating body is provided at its head or in a partition wall with an aperture, and after drying and before baking porcelain powder is filled into the cavity of the body, the powder expelling the air confined within the cavity so that after closing the aperture no internal pressure adapted to deform the walls of the porcelain body can beproduced.
- a previously baked solid body of porcelain can be used for filling the cavity. In both cases, when baking the body there is neither sintering nor ex pension of the filling body. Further the air has been expelled from the cavity, so that when baking there is no objectionable gas pressure within the insulating body.
- FIGs. 1 to 3 are sectional elevations showing three examples of the porcelain bodies used as insulators for overhead leads
- Fig. 4 is an .elevation showing an insulator for insulating bars
- Fig. 5 is an elevation showing a supporting insulator adapted to be provided with top and bot-tom fixtures.
- the insulating body a is provided with a cavity subdivided by a partition 6 into chambers c and d.
- the lower chamber a is designed for receiving the fixture for securing the insulator to its support
- the upper chamber d is designed to receive a filling body 6, the upper chamber communicating with the lower chamber 0 through an aperture f made in the. partition b.
- the upper chamber at is completely filled with porcelain powder providing the filling body 6, as is shown in Fig. 1, whereupon the aperture f is closed by a stopper of porcelain.
- the filling e is entirely indifferent, and in the baked insulator it increases the length of porcelain disposed between the electric lead and the support, and therefore the insulating power of the insulator.
- the aperture f is made in the head of the insulating body and the partition b is made solid.
- the stopper closing the aperture f is glazed and may be dispensed with, if the filling body 6 consists of a coherent body or of sinterlng material.
- the filling body is preferably madefrom a porcelain body which completely fills out the hollow space, and which is connected in a suitable way with the innerwall of the hollow space (1 or which is held in position by means of a supporting member inserted'into the cavity 0 In the other case the.
- filling material such as powdered porcelain or the like
- a plastic mass by admixing thereto glazing material or plastic porcelain, and pressing the same into the v hollow space.
- body'a filling body is produced which 15 ntimately connected with' the Wall of the 1nsulating body, and which has the same coefficient of expansion as the insulatingbody.
- the cavity of the insulator a1. is separated by a partition binto two chambers, the lower one a being open at its bottom and the upper one d being open at its top.
- the upper chamber is provided ;with the filling body 6' in the manner just described, which filling body rests on the partition 6.
- the cavity of the insulating body a is divided by a partition 22 into separate chambers and (Z the lower chamber 0 and i the upper chamber (1 being adapted to receive respectively the bottom fixture and the top fixture.
- the upper part of the lower chamber 0 is filled with the filling body 6 the said filling body being applied thereto either in the manner described with reference to Fig. 3 or by means of a second partition I).
Description
y 1 E. R. c. BOELCKE METHOD OFMANUFACTURING ELECTRIC INSULATORS Filed Oct. 5, 1925 4 INVENTUR MWWMM I .dZ/arzzay.
Patented July 19, 1 927.
UNITED STATES zoom REIN'HOLD CARL IBOELCKE 0F CHARLOTTENBURG, GERMANY.
METHOD OF MANUFACTURING ELECTRIC INSULATOBS.
Application filed October 5, 1925, Serial No My invention relates to improvements in I the method of manufacturing electric insulators.
The manufacture of electric insulators presents the difliculty that when baking the porcelain body inner tensions are produced, which cause cracks and other deformations interfering with the insulating capacity. Therefore the porcelain bodies are constructed as far as possible with walls of uniform thickness, which, however, is not al- Ways possible in all the parts of the body. For obtaining walls ofuniform thickness cavities are provided in the thicker portions of the body. But in this method the air confined within the cavities is expanded by heat when baking the bodies, so that a high pressure is exerted on the walls which pressure forces the walls outwardly and produces objectionable passages and other deformations reducing the strength of the porcelain body and the insulating capacity thereof.
According to the present invention these objections are obviated by filling the cavity or cavities provided within the insulating body with insulating matter having a very small coeflicient of shrinkage or expansion, or having a coeflicient of expansion equal or substantlally equal to the coefiicient of expension of the material of the insulating body. For example the insulating body is provided at its head or in a partition wall with an aperture, and after drying and before baking porcelain powder is filled into the cavity of the body, the powder expelling the air confined within the cavity so that after closing the aperture no internal pressure adapted to deform the walls of the porcelain body can beproduced. Instead of I the porcelain powder a previously baked solid body of porcelain can be used for filling the cavity. In both cases, when baking the body there is neither sintering nor ex pension of the filling body. Further the air has been expelled from the cavity, so that when baking there is no objectionable gas pressure within the insulating body.
In the accompanying drawing Figs. 1 to 3 are sectional elevations showing three examples of the porcelain bodies used as insulators for overhead leads, Fig. 4, is an .elevation showing an insulator for insulating bars and Fig. 5, is an elevation showing a supporting insulator adapted to be provided with top and bot-tom fixtures.
. 60,556, and in Germany December 30, 1924.
In the example shownin Fig. 1 the insulating body a. is provided with a cavity subdivided by a partition 6 into chambers c and d. The lower chamber a is designed for receiving the fixture for securing the insulator to its support, while the upper chamber d is designed to receive a filling body 6, the upper chamber communicating with the lower chamber 0 through an aperture f made in the. partition b. After drying the insulating body the upper chamber at is completely filled with porcelain powder providing the filling body 6, as is shown in Fig. 1, whereupon the aperture f is closed by a stopper of porcelain. When baking the body the filling e is entirely indifferent, and in the baked insulator it increases the length of porcelain disposed between the electric lead and the support, and therefore the insulating power of the insulator.
In the modification shown in Fig. 2 the aperture f is made in the head of the insulating body and the partition b is made solid. When filling the cavity d before baking with porcelain powder 6 the stopper closing the aperture f is glazed and may be dispensed with, if the filling body 6 consists of a coherent body or of sinterlng material. In the first case the filling body is preferably madefrom a porcelain body which completely fills out the hollow space, and which is connected in a suitable way with the innerwall of the hollow space (1 or which is held in position by means of a supporting member inserted'into the cavity 0 In the other case the. filling material, such as powdered porcelain or the like, can be transformed into a plastic mass by admixing thereto glazing material or plastic porcelain, and pressing the same into the v hollow space. In this case when baking the body'a filling body is produced which 15 ntimately connected with' the Wall of the 1nsulating body, and which has the same coefficient of expansion as the insulatingbody.
In an insulator of the class shown in Fig. 4, which is designed for supporting leads in the form of bars, the cavity of the insulator a1. is separated by a partition binto two chambers, the lower one a being open at its bottom and the upper one d being open at its top. The upper chamber is provided ;with the filling body 6' in the manner just described, which filling body rests on the partition 6.
In an insulator of the type shown in Fig. 5 the cavity of the insulating body a is divided by a partition 22 into separate chambers and (Z the lower chamber 0 and i the upper chamber (1 being adapted to receive respectively the bottom fixture and the top fixture. In this case the upper part of the lower chamber 0 is filled with the filling body 6 the said filling body being applied thereto either in the manner described with reference to Fig. 3 or by means of a second partition I).
I claim:
1. The herein described method of manufacturing electric insulators, which consists in moulding the insulator with a cavity, drying the insulator, putting into said cavity insulating matter which does not expand when being baked, and baking the insulator.
8. The herein described method of manufacturing electric insulators, which consists in moulding the insulator with a cavity, drying the insulator, putting into said cavit a mixture of disintegrated porcelain an a plastic binding medium, and baking the insulator.
4. The herein described method of manufacturing electric insulators, which consists in moulding the insulator with a cavity, drying the insulator, putting into said cavity a body of previously baked porcelain, and baking the insulator.
In testimony whereof I hereunto aflix my signature.
EUGEN REINHOLD CARL BOELCKE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1636282X | 1924-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1636282A true US1636282A (en) | 1927-07-19 |
Family
ID=7737788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US60556A Expired - Lifetime US1636282A (en) | 1924-12-30 | 1925-10-05 | Method of manufacturing electric insulators |
Country Status (1)
Country | Link |
---|---|
US (1) | US1636282A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8991211B1 (en) * | 2009-11-01 | 2015-03-31 | The Exone Company | Three-dimensional printing glass articles |
-
1925
- 1925-10-05 US US60556A patent/US1636282A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8991211B1 (en) * | 2009-11-01 | 2015-03-31 | The Exone Company | Three-dimensional printing glass articles |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3034191A (en) | Isostatic molding apparatus | |
ES2159139T3 (en) | SPONGE CERAMIC OF OPEN CELLS WITH HIGH RESISTANCE AND PROCEDURE FOR ITS PRODUCTION. | |
US1636282A (en) | Method of manufacturing electric insulators | |
CA2187829A1 (en) | Temperature compensated microwave filter | |
US7250843B2 (en) | Tubular fuse component with end caps with a hermetically sealing plastic sealing body insert | |
US1164739A (en) | Method of making insulating devices. | |
US2070672A (en) | Method of producing double-wall vessels of ceramic material and with rarefaction of the air within the wall spaces | |
US1739222A (en) | Shrink-head casing for ingot molds | |
US2726404A (en) | Liners for closet tanks or the like | |
AT520919B1 (en) | Transport container for transporting temperature-sensitive cargo | |
US2092001A (en) | Method of making ceramic products | |
US2873342A (en) | Electric heating | |
JPS624205B2 (en) | ||
US2404636A (en) | Vulcanizing mold and method of operation | |
PT98005A (en) | PROCESS FOR OBTAINING CERAMIC ARTICLES WITH OCCASIVE INTERIOR CAVITIES | |
US1347367A (en) | Sparking plug for internal-combustion engines and method of manufacturing the same | |
US2264428A (en) | Article of ceramic or vitreous material | |
US2224853A (en) | Method of manufacturing ceramic or vitreous ware | |
US1910041A (en) | Process of manufacturing electric heating element | |
JP3780060B2 (en) | Functionally gradient material, lamp sealing member, and method for manufacturing the same | |
JPS5795432A (en) | Mold structure for reaction injection molding | |
US1770479A (en) | Mercury switch | |
US2155836A (en) | Insulator | |
US2653281A (en) | Electrostatic capacitor | |
US1733729A (en) | Method of casting link-type insulators |