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US1956721A - Insulated electrical conductor - Google Patents

Insulated electrical conductor Download PDF

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Publication number
US1956721A
US1956721A US602240A US60224032A US1956721A US 1956721 A US1956721 A US 1956721A US 602240 A US602240 A US 602240A US 60224032 A US60224032 A US 60224032A US 1956721 A US1956721 A US 1956721A
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United States
Prior art keywords
layer
conductor
rubber
stearin pitch
jacket
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
Application number
US602240A
Inventor
Joseph A Kennedy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anaconda Wire and Cable Co
Original Assignee
Anaconda Wire and Cable Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anaconda Wire and Cable Co filed Critical Anaconda Wire and Cable Co
Priority to US602240A priority Critical patent/US1956721A/en
Application granted granted Critical
Publication of US1956721A publication Critical patent/US1956721A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29Protection against damage caused by extremes of temperature or by flame
    • H01B7/295Protection against damage caused by extremes of temperature or by flame using material resistant to flame

Definitions

  • This invention relates to improvements in insulated conductors and more specically to that' type of conductor in which there is a layer of insulation surrounded by a jacket enclosed or impregnated with a body of stearin pitch.
  • Such stearin pitch is desirable for use in this environment because it is substantially or approximately nonble. ⁇ But, such material is relatively sticky or tacky and has a tendency, even when given various treatments known inthe art, to become softened under the inluence of heat.
  • Various ways have been suggested for treating such stearin pitch conductors. It has formerly been proposed to cover the pitch surface with wax. It has also been proposed to coat the same with a layer of silicate ofsoda or a layer of lacquer. 'I'he use of various gums have also been suggested. In conductors heretofore provided, several difficul- 20 ties have been experienced in imparting to the conductors a distinctive coloring.
  • the present invention is intended to overcome the above and other disadvantages in prior practice.
  • FIG. l is an enlarged view partly in elevation and partly in sectionillustrating one embodiment of the invention.
  • Fig. 2 is a section on line 2 2 of Fig. 1;
  • Fig. 3 is a view similar to Fig. 1 illustrating a modication.
  • a Wire, cable or stranded conductor which is surrounded by a. body of insulation 12, such as rubber, or the like in any manner well known in the art.
  • a braided, woven, or a wrapped jacket 14 which may be treated with a water-proong compound, such as asphalt or the like.
  • I have shown a woven sheath. Regardless of what form of jacket is used, I envelop the same with a layer 16 of stearin pitch. This material may enter between the interstices of the strands which make up the sheath and may also form a thin outer layer thereon.
  • the conductor thus far described may be produced in any of the prior known methods.
  • One novel and important feature of the present invention resides in enveloping the stearinpitch r coated jacket with a body of rubber, so as to over-v come the objectional stickiness inherent in stearin pitch.
  • the latex may have suitable pigments incorporated therein. These distinctive colorings will serve to identify various circuit Wires, or the polarity of the conductor.
  • latex enables me in one operation to produce a conductor with a lm of unmasticated ⁇ rubber enveloping the stearin pitch, thus overcoming its stickiness and at the same time enables me to obtain a neat finish having a distinctive identifying color.
  • the latter may be rst covered with a thin layer of hardening material such as silicate of soda, as indicated at 20 in Fig. 3. Over this, there will be applied the 80 layer 18 of rubber, as shown.
  • a thin layer of hardening material such as silicate of soda
  • a conductor having an enclosing layer of insulation, a jacket of interconnected strands surrounding said insulation,-a body of stearin pitch 90 bonded to and enveloping said jacket and a layer of rubber in direct contact with and surrounding said body of stearin pitch.
  • a conductor having an enclosing layer of insulation, a jacket of interconnected strands surrounding said insulation-a body of stearin pitch bonded to and enveloping said jacket and a layer of unmasticated rubber which is the residuel of an original latex aqueous 'solution directly engaging 100 and surrounding said body of stearin pitch.
  • a conductor having an enclosing layer of insulation, a jacket surrounding' said insulation, a body of stearin pitch impregnating said jacket, and a layer of rubber directly engaging and surrounding said body of stearin pitch.
  • a conductor having an enclosing layer of insulation, a. jacket surrounding said insulation, a body of stearin pitch surrounding said jacket and a layer of rubber directly engaging and surrounding said body of stearin pitch said rubber having a. distinctive coloring pigment incorporated therein.
  • a conductor having an enclosing layer of insulation including a body of stearin pitch and a layer of rubber directly engaging and surrounding said body of stearin pitch.
  • a conductor having an enclosing layer of insulation including a body of stearin pitch and a iii?

Landscapes

  • Insulated Conductors (AREA)

Description

J. A. KENNEDY May 1, 1934.
NSULATED ELECTRCAL CONDUCTOR Filed March 5l, 1952,
|NvENToR JJEPH /L/E/v/VED H BY H Z-VEYS M Patented May 1, 1934 PATENT OFFICE 1,956,721 INsULA'rED ELECTRICAL ooNDUC'ron Joseph A. Kennedy, Pawtucket, R. I., assignor to Anaconda Wire & Cable Company, New York, N. Y., a corporation of Delaware Application March 31, 1932, Serial N0. 602,240
7 Claims.
This invention relates to improvements in insulated conductors and more specically to that' type of conductor in which there is a layer of insulation surrounded by a jacket enclosed or impregnated with a body of stearin pitch.
It is well known in the art that such stearin pitch is desirable for use in this environment because it is substantially or approximately nonble.` But, such material is relatively sticky or tacky and has a tendency, even when given various treatments known inthe art, to become softened under the inluence of heat. Various ways have been suggested for treating such stearin pitch conductors. It has formerly been proposed to cover the pitch surface with wax. It has also been proposed to coat the same with a layer of silicate ofsoda or a layer of lacquer. 'I'he use of various gums have also been suggested. In conductors heretofore provided, several difficul- 20 ties have been experienced in imparting to the conductors a distinctive coloring.
The present invention is intended to overcome the above and other disadvantages in prior practice.
'I'he invention will be fully apparent from the vfollowing specification when read in connection with the accompanying drawing and will be pointed out with particularity in the appended claims.
In the drawing- Fig. l is an enlarged view partly in elevation and partly in sectionillustrating one embodiment of the invention;
Fig. 2 is a section on line 2 2 of Fig. 1;
Fig. 3 is a view similar to Fig. 1 illustrating a modication.
Referring detail to the drawing, may be considered either a Wire, cable or stranded conductor which is surrounded by a. body of insulation 12, such as rubber, or the like in any manner well known in the art. Over this, there is a braided, woven, or a wrapped jacket 14, which may be treated with a water-proong compound, such as asphalt or the like. In the embodiment V illustrated in the drawing, I have shown a woven sheath. Regardless of what form of jacket is used, I envelop the same with a layer 16 of stearin pitch. This material may enter between the interstices of the strands which make up the sheath and may also form a thin outer layer thereon.
The conductor thus far described may be produced in any of the prior known methods. One novel and important feature of the present invention resides in enveloping the stearinpitch r coated jacket with a body of rubber, so as to over-v come the objectional stickiness inherent in stearin pitch. In the manufacture of the conductor, I pass the stearin pitch coated conductor through a bath comprising an aqueous dispersion of rubber latex. This deposits a relatively thin film over the exterior of the layer of stearin pitch, which when exposed to air is self-curing, thus forming the outer waterproof rubber layer, indicated at 18. In order to impart any desired distinctive coloring to the outer rubber layer 18, the latex may have suitable pigments incorporated therein. These distinctive colorings will serve to identify various circuit Wires, or the polarity of the conductor.
The use of latex enables me in one operation to produce a conductor with a lm of unmasticated `rubber enveloping the stearin pitch, thus overcoming its stickiness and at the same time enables me to obtain a neat finish having a distinctive identifying color.
In some cases, instead of applying the colored latex directly to the stearin pitch, the latter may be rst covered with a thin layer of hardening material such as silicate of soda, as indicated at 20 in Fig. 3. Over this, there will be applied the 80 layer 18 of rubber, as shown.
While I have described quite precisely the particular embodiments of the invention illustrated it is to be understood that the drawing and description are to be interpreted in an illustrative rather than a limiting sense.
What I claim is:-
1. A conductor having an enclosing layer of insulation, a jacket of interconnected strands surrounding said insulation,-a body of stearin pitch 90 bonded to and enveloping said jacket and a layer of rubber in direct contact with and surrounding said body of stearin pitch.
2. A conductor having an enclosing layer of insulation, a jacket of interconnected strands surrounding said insulation-a body of stearin pitch bonded to and enveloping said jacket and a layer of unmasticated rubber which is the residuel of an original latex aqueous 'solution directly engaging 100 and surrounding said body of stearin pitch.
3. A conductor having an enclosing layer of insulation, a jacket surrounding' said insulation, a body of stearin pitch impregnating said jacket, and a layer of rubber directly engaging and surrounding said body of stearin pitch.
4. A conductor having an enclosing layer of insulation, a. jacket surrounding said insulation, a body of stearin pitch surrounding said jacket and a layer of rubber directly engaging and surrounding said body of stearin pitch said rubber having a. distinctive coloring pigment incorporated therein.
5. A conductor having an enclosing layer of insulation including a body of stearin pitch and a layer of rubber directly engaging and surrounding said body of stearin pitch.
6. A conductor having an enclosing layer of insulation including a body of stearin pitch and a iii?
US602240A 1932-03-31 1932-03-31 Insulated electrical conductor Expired - Lifetime US1956721A (en)

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Application Number Priority Date Filing Date Title
US602240A US1956721A (en) 1932-03-31 1932-03-31 Insulated electrical conductor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571692A (en) * 1944-03-11 1951-10-16 Libbey Owens Ford Glass Co Fishing rod

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571692A (en) * 1944-03-11 1951-10-16 Libbey Owens Ford Glass Co Fishing rod

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