US1734309A - Electric resistance material - Google Patents

Electric resistance material Download PDF

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Publication number
US1734309A
US1734309A US664575A US66457523A US1734309A US 1734309 A US1734309 A US 1734309A US 664575 A US664575 A US 664575A US 66457523 A US66457523 A US 66457523A US 1734309 A US1734309 A US 1734309A
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Prior art keywords
resistance material
electric resistance
electrical
composition
rubber
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US664575A
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Torrence A Swartz
Wilmer P Uhler
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Priority to US664575A priority Critical patent/US1734309A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

Definitions

  • Our invention relates particularly to a composition of matter which/may be formed to provide electrical resistajfi e devices having extremel high resistive qualities.
  • the principal objects of our invention are to provide an electrical resistance material that will not only afford the infinitely high resistive qualities required, but that will have the tensile and transverse strength desired, and that will maintain its uniformity and permanence.
  • the form of our invention as hereinafter described comprehends an electric resistance material formed of a composition of matter comprising rubber, sulphur and an inert substance serving as a filler, and finely divided particles of electrical conducting material uniformly embodied therein.
  • Ourinvention also includes all of the various novel features of production and embodiment as hereinafter more definitely specified.
  • inert substance such as blanc fixe or barium sulphate (BaSo) having embodied therein carbon, preferably in the form of" lamp-black, gas-black, powdered graphite or other suitable finely divided electrical conducting materials, and that these combined substances may be conveniently mixed by the use of rubber mixing rollers in a well-known manner.
  • composition thus described may be conveniently moulded into suitable form and vulcanized, preferably to form vulcanite, and may be prepared for use in a variety of forms, such as plates, discs, bars, rods or Wire that may be conveniently adapted to any conditions ordinarily found in commercial devices.
  • Our invention is advantageous in that it 7 provides a non-fragile resistance material having an infinitely high resistance value. and consequently can be adapted to conditions not heretofore possible.
  • An electrical resistance material comprising a vulcanized composition consisting of rubber, sulphur, barium sulfate and finely divided particles of carbon, the relative rosortions of said barium sulfate and car on etermining the specific resistivity of the material.
  • An electrical resistance material comprising a coherent vulcanized composition of approximately 40% of rubber, 20% of sulphur, 15 to 35% of lamp black, and 25 to 5% of barium sulfate.

Description

Patented Nov. 5, 1929 UNITED STATES PATENT, OFFICE TORRENCE A. SWARTZ AND WILMER 1P. UHLER, OF TOTTENVILLE, NEW YORK ELECTRIC RESISTANCE MATERIAL No Drawing.
Our invention relates particularly to a composition of matter which/may be formed to provide electrical resistajfi e devices having extremel high resistive qualities.
5 It is wellnown that in certain electrical devices, such as are employed in wireless apparatus and other highly sensitive instruments, it is necessary to employ resistance of extremely high value, and that resistance materials, as heretofore produced, lack the desired tensile and transverse strength and therefore have their limitations for installation. Furthermore, in resistance devices employing carbon and graphite coated surfaces,
it is diflicult to either secure or maintain uniformity and permanence of resistance value.
The principal objects of our invention are to provide an electrical resistance material that will not only afford the infinitely high resistive qualities required, but that will have the tensile and transverse strength desired, and that will maintain its uniformity and permanence.
Other objects of our invention are to provide an electric resistance material in which the electrical conducting medium may be so varied as to afford an extremely wide range of conductivity and that may be readily moulded or otherwise formed into any desired shape or drawn into wire if desired, and
which may be flexed and connected in any desired manner.
The form of our invention as hereinafter described comprehends an electric resistance material formed of a composition of matter comprising rubber, sulphur and an inert substance serving as a filler, and finely divided particles of electrical conducting material uniformly embodied therein.
Ourinvention also includes all of the various novel features of production and embodiment as hereinafter more definitely specified.
We have found that a resistance material having extremely high electrical resistive 4 qualities, combined with the desired features Application filed September 24, 1928. Serial No. 664,575.
inert substance such as blanc fixe or barium sulphate (BaSo) having embodied therein carbon, preferably in the form of" lamp-black, gas-black, powdered graphite or other suitable finely divided electrical conducting materials, and that these combined substances may be conveniently mixed by the use of rubber mixing rollers in a well-known manner.
We have also found that desirable results may be attained by forming the composition of forty (40%) per cent rubber, twenty (20%) per cent sulphur, fifteen (15%) per cerit-thirty-five (35%) per cent lamp-black, and twenty-five (25%) per cent-five (5%) per cent blanc fixe. It is to be understood, however, that the proportions herein set forth may be widely varied to adapt the resulting resistance material to varying conditions that may be encountered.
\ The composition thus described may be conveniently moulded into suitable form and vulcanized, preferably to form vulcanite, and may be prepared for use in a variety of forms, such as plates, discs, bars, rods or Wire that may be conveniently adapted to any conditions ordinarily found in commercial devices.
Our invention is advantageous in that it 7 provides a non-fragile resistance material having an infinitely high resistance value. and consequently can be adapted to conditions not heretofore possible.
We do not desire to limit our invention to 0 the specific materials and their proportions herein set forth, as it is obvious that various modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Having thus described our invention, we claim I 1. An electrical resistance material comprising a vulcanized composition consisting of rubber, sulphur, barium sulfate and finely divided particles of carbon, the relative rosortions of said barium sulfate and car on etermining the specific resistivity of the material.
2. An electrical resistance material comprising a coherent vulcanized composition of approximately 40% of rubber, 20% of sulphur, 15 to 35% of lamp black, and 25 to 5% of barium sulfate.
In witness whereof, we have hereunto set our hands the 20th day of September, A. D., 1923, and the 20th day of September, A. D.,
1923 respectively. TORRENCE A. SWARTZ.
WILMER P. UHLER.
US664575A 1923-09-24 1923-09-24 Electric resistance material Expired - Lifetime US1734309A (en)

Priority Applications (1)

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US664575A US1734309A (en) 1923-09-24 1923-09-24 Electric resistance material

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US664575A US1734309A (en) 1923-09-24 1923-09-24 Electric resistance material

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US1734309A true US1734309A (en) 1929-11-05

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