Heat resistant self extinguishing communications cable and cord

A heat resistant cable or cord connecting element having two ends, one end being connected to a communications transmitter and the second end being connected to a microphone or other voice transmitting device whereby said cable or cord connector comprises a series of wire transmitting elements wherein each of said wire transmitting elements enclosed therein, and a layer of a tightly wound metallic closely formed wire sheath is formed around all of the series of wires followed by a polychloroprene rubber layer surrounding said sheath and all of said wire systems so that a degree of fire retardancy and fire extinguishing ability will be provided and wherein said polychloroprene rubber layer is manufactured from the following ingredients:

• Material
• PHR (Range)
• Preferred PHR
• Polychloroprene
• 100
• 100
• Carbon Black N330
• 14.25 to 15.75
• 15
• Octylated diphenylamines
• 2.14 to 2.36
• 2.25
• Fatty Acid
• 0.33 to .37
• 0.35
• Magnesium Oxide
• 3.8 to 4.2
• 4
• Zinc oxide
• 7.6 to 8.4
• 8
• 3-methyl-thiazolidine-thione-2
• .95 to 1.05
• 1.0
• Aluminum Trihydrate
• 57 to 63
• 60
• Silicon Dioxide
• 14.25 to 15,75
• 15
• Zinc Borate
• 4.75 to 5.25
• 5
• Antimony Oxide
• 6.65 to 7.35
• 7
• Chlorinated Paraffin
• 6.65 to 7.35
• 7
• 1,4-Benzenediamine,
• 1.9 to 2.1
• 2
• N,N'-mixed Phenyl and tolyl
• derivatives
• Polyethylene Glycol
• 1.43 to 1.58
• 1.5
• Polyethylene homopolymer
• 4.75 to 5.25
• 5.