US1979995A - Insulation - Google Patents
Insulation Download PDFInfo
- Publication number
- US1979995A US1979995A US677868A US67786833A US1979995A US 1979995 A US1979995 A US 1979995A US 677868 A US677868 A US 677868A US 67786833 A US67786833 A US 67786833A US 1979995 A US1979995 A US 1979995A
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- US
- United States
- Prior art keywords
- conductor
- asbestos
- plate
- loosening
- insulation
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/12—Insulating conductors or cables by applying loose fibres
Definitions
- I is A tol-ney.
- the loosening device consists in a plurality of steel pointed membersarranged to engage the asbestoswovering, and to rotate at a relatively high speed around the conductor.
- the invention is shown as applied to apparatus for applying asbestos fibres to an electrical conductor.
- the conductor 10 is advanced in a vertical direction through the apparatus. It will be understood that the conductor 10 will usually be fed from a suitable supply spool (notshown) from which it will be advanced to a suitable collecting spool (also notshown). This collecting spool will be driven by some suitable means to advance the conductor through the apparatus, or the conductor may be advanced by any wellknown suitablemeans.
- the conductor 10 as it advances passes through a suitable container 11 in which a suitable adhesive material is placed so that the conductor Then the asbestos which has thus been applied to the conductor is subjectedlto a suitable crushing or loosening operation, whereby the asbestos fibres are distributed uniformly over the surface of the conductor.
- This loosening device comprises a plate 14 upon which are supported a plurality of tooth-like.
- each of the members 15, as shown, is provided at its upper end with a tapered point 16, and while the members 15 are positioned adjacent the periphery of the plate 14, they are. inclined inwardly so that the points 16 engage the asbestos covering of the conductor 10 as it advances.
- the plate 14 is driven at a'relatively high speed by any suitable means, such, for example, as an electric motor, which may be connected to the plate by means of a beltdrive.
- the plate 14- is providedwith a pulley 17 over which a suitable driving belt may be passed.
- the plate 13 which carries the asbestos spool 12 may be rotated in a counter-clockwise direction, as viewed in the figure, so that as the conductor advances in an upward direction, the asbestos yarn will be unwound from the spool 12 and wound about the conductor. If desired, the
- the ' plate 13 may be stationary, because it has been found that the action of the loosening members the yarn to distribute it,- will at the same time function to wind it spirally about the conductor.
- the plate 14 carrying the loosening members 15 will be rotated in a clockwise direction, as viewed in the figure.
- the asbestos covering is subjected to a smoothing operation, This is accomplishedby means of a rotary device comprising a pair of shoes 18, which are biased to engage opposite sides of the conductor by means of suitable springs 20.
- a rotary device comprising a pair of shoes 18, which are biased to engage opposite sides of the conductor by means of suitable springs 20.
- Theseshoes 18 are carried by means of a supporting plate 21, which is arranged to be rotated at a high speed about the conductor.
- the member 21, as'shown, is provided with a suitable pulley 22 over which a driving belt may be directed.
- a suitable impregnating compound such as an electrically insulating varnish, whereby the insulating covering isthoroughly impregnated with the compound, after which many modifications may be made, and I, therefore, contemplate by the appended claims to cover any such modifications as tall within the true spirit and scope of my invention.
- Apparatus for applyingfasbestos and like materials to a conductor and the like comprising means for advancing said conductor, means for said supporting member, each member having one end resting on said supporting member and its other end terminating in a sharp point, said members being arranged so that said points engagethe material covering said conductor as the conductor advances, and means for efiecting relative motion between said supporting member and said conductor whereby said covering is unlformly distributed about said conductor.
- Apparatus for applying asbestos and like materials to a conductor andthe like comprising means for advancing said conductor, means for applying an adhesive to said conductor as it advances, means for wrapping a yarn formed of said material onto said conductor as it advances, a
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
E. PFITZER Nov. 6, 1934.
INSULATION Filed June 27, 1933 Inventor: Emil FitZeF:
I is A tol-ney.
Patented Nov; 6, 1934 UNlTED STATES PATENT OFFICE INSULATION Emil Pl'itzer, Berlin-Kopenick, Germany, assignor to General Electric Company, a corporation of New York Application June 27, 1933', Serial No, 677,868
In Germany December 9, 1932 2 Claims. ('01. 117-2 dry to the conductor which will have been previously covered with an adhesive. In these processes, the structure of the asbestos is loosened before it is applied to the conductor. The loss oi mechanical strength of the asbestos due to this loosening has resulted in poor insulation in some cases, because it has been difiicult to prevent slip ping of the insulation while applying it to the conductor and during the subsequent finishing steps which consist in smoothing, impregnating, and like operations.
It has also been proposed in order to avoid loosening of the fibrous material before applying it, to apply the asbestos yarn to the conductor by spinning it onto the conductor, which will have been previously provided with an adhesive covering. The disadvantage of this process resides in the fact that the asbestos yarn at the best possesses but very little tensile strength, and consequently the yarn cannot be wound with sufllcient tension to cause it to lie tightly and compactly on the conductor. As a result, spiral gaps are formed in the insulation covering which cannot be completely eliminated by subsequent smoothing operations.
In accordance with this invention, asbestos yarn is applied to the conductor to which an adhesive has been applied. Then the asbestos covering is subjected to the action of suitable loosening devices so as to distribute the asbestos fibres uniformly over the conductor. In one form of this invention, the loosening device consists in a plurality of steel pointed membersarranged to engage the asbestoswovering, and to rotate at a relatively high speed around the conductor.
For a more complete understanding of this invention, reference should be had to the accompanying drawing in which the single figure illustrates in diagrammatic form apparatus for insulating electrical conductors arranged in accordance with this invention.
Referring to the drawing, the invention is shown as applied to apparatus for applying asbestos fibres to an electrical conductor. As shown, the conductor 10 is advanced in a vertical direction through the apparatus. It will be understood that the conductor 10 will usually be fed from a suitable supply spool (notshown) from which it will be advanced to a suitable collecting spool (also notshown). This collecting spool will be driven by some suitable means to advance the conductor through the apparatus, or the conductor may be advanced by any wellknown suitablemeans.
The conductor 10 as it advances passes through a suitable container 11 in which a suitable adhesive material is placed so that the conductor Then the asbestos which has thus been applied to the conductor is subjectedlto a suitable crushing or loosening operation, whereby the asbestos fibres are distributed uniformly over the surface of the conductor. A w
This loosening device comprises a plate 14 upon which are supported a plurality of tooth-like.
The plate 13 which carries the asbestos spool 12 may be rotated in a counter-clockwise direction, as viewed in the figure, so that as the conductor advances in an upward direction, the asbestos yarn will be unwound from the spool 12 and wound about the conductor. If desired, the
' plate 13 may be stationary, because it has been found that the action of the loosening members the yarn to distribute it,- will at the same time function to wind it spirally about the conductor. Preferably, the plate 14 carrying the loosening members 15 will be rotated in a clockwise direction, as viewed in the figure.
. It has been found that asbestos applied to the conductor in accordance with this invention will completely cover the conductor ina uniform layer, which possesses considerable mechanical strength.
After the conductor 10 advances vertically .beyond the loosening devices 15, the asbestos covering is subjected to a smoothing operation, This is accomplishedby means of a rotary device comprising a pair of shoes 18, which are biased to engage opposite sides of the conductor by means of suitable springs 20. Theseshoes 18 are carried by means of a supporting plate 21, which is arranged to be rotated at a high speed about the conductor. The member 21, as'shown, is provided with a suitable pulley 22 over which a driving belt may be directed. e
After the conductor 10 leaves the smoothing shoes 18, it is passed through a suitable container 23 in which a suitable impregnating compound is contained, such as an electrically insulating varnish, whereby the insulating covering isthoroughly impregnated with the compound, after which many modifications may be made, and I, therefore, contemplate by the appended claims to cover any such modifications as tall within the true spirit and scope of my invention.
-What I claim as new and desire to secure by Letters Patent 01'. the United States is:
1. Apparatus for applyingfasbestos and like materials to a conductor and the like comprising means for advancing said conductor, means for said supporting member, each member having one end resting on said supporting member and its other end terminating in a sharp point, said members being arranged so that said points engagethe material covering said conductor as the conductor advances, and means for efiecting relative motion between said supporting member and said conductor whereby said covering is unlformly distributed about said conductor.
2. Apparatus for applying asbestos and like materials to a conductor andthe like comprising means for advancing said conductor, means for applying an adhesive to said conductor as it advances, means for wrapping a yarn formed of said material onto said conductor as it advances, a
supporting member arranged to rotate on an axis.
said supporting member at a relatively high speed.
' EMIL PFI'I'ZER.
a'plurality of members spaced at intervals on
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1979995X | 1932-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1979995A true US1979995A (en) | 1934-11-06 |
Family
ID=7853919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US677868A Expired - Lifetime US1979995A (en) | 1932-12-09 | 1933-06-27 | Insulation |
Country Status (1)
Country | Link |
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US (1) | US1979995A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3053039A (en) * | 1959-05-14 | 1962-09-11 | Siemens Ag | Method and apparatus for producing stranded-cable components |
-
1933
- 1933-06-27 US US677868A patent/US1979995A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3053039A (en) * | 1959-05-14 | 1962-09-11 | Siemens Ag | Method and apparatus for producing stranded-cable components |
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