Arc-extinguishing materials

Claim 2

AN ARC-EXTINGUISHING MATERIAL CONSISTING OF A COMPOUND COMPRISING A PRIMARY INGREDIENT HAVNG ARC-EXTINGUISHING PROPERTIES, AND A BINDER, SAID PRIMARY INGREDIENT INCLUDING AN ELEMENT HAVING A FIRST IONIZATION POTENTIAL NO LESS THAN 7.54 ELECTRON VOLTS AND SELECTED FROM A CLASS CONSISTING OF SILVER, TANTALUM, COPPER, RHENIUM, TUNGSTEN, BORON, PALLADIUM, TELLURIUM, ZINC AND SELENIUM, THE RELATIVE PROPORTIONS 0F SAID PRIMARY INGREDIENT AND SAID BINDER BEING A SILICONE RESIN, THE CARBON ATOMS OF SAID TOTAL COMPOUND BEING NO GREATER THAN FIFTEEN PERCENT OF THE TOTAL CONCENTRATION OF ATOMS THEREOF.

Claim 3

An arc-extinguishing material as set forth in claim 1, wherein said compound has a boiling temperature no greater than 2,000* C, and said element is selected from a class consisting of silver, tellurium, zinc and selenium, the boiling points of such elements in pure form being less than 2,000* C.

Claim 4

An arc-extinguishing material as set forth in claim 1, wherein said compound has a boiling temperature no greater than 2,000* C, and said element is selected from a class consisting of tantalum, copper, tungsten, boron and palladium, the boiling points of such elements in pure form being greater than 2,000* C, said binder and said selected element comprising said compound having a boiling temperature no greater than 2,000* C.

Claim 5

An arc-extinguishing material consisting of a compound characterized by a negligible rate of reformation after decomposition, said compound being boron oxide and a silicon based resin.

Claim 6

An arc-extinguishing material consisting of a compound characterized by a negligible rate of reformation after decomposition, said compound being boron oxide and a silicon based resin.

Claim 7

An arc-extinguishing material consisting of a compound characterized by a negligible rate of reformation after decomposition, said compound being boric acid and a silicone based resin.

Claim 8

An arc-extinguishing material consisting of a compound characterized by a negligible rate of reformation after decomposition, said compound being boric acid and a silicone based resin.

Claim 9

An arc-extinguishing material as set forth in claim 1, wherein said primary ingredient comprises at least 40 percent by weight of said compound.

Claim 10

An arc-extinguishing material as set forth in claim 1, wherein said primary ingredient comprises at least 55 percent by weight of said compOund.

Claim 11

An arc-extinguishing material as set forth in claim 1, wherein said primary ingredient comprises about 56 percent by weight of said compound.

Claim 12

An arc-extinguishing material consisting of a compound characterized by negligible rate of reformation after decomposition, a first ionization potential no less than 7.54 electron volts, a boiling temperature no greater than 2,000* C, for which decomposition is an endothermic process, having thermal conductivity of at least one-thousandth of a calorie per second per square centimeter per degree Centigrade per centimeter, said compound comprising a primary ingredient and a binder, said primary ingredient including an element selected from a class consisting of silver, tantalum, copper, rhenium, tungsten, boron, palladium, tellurium, zinc and selenium, said binder being a silicone resin, the carbon content and proportion thereof relative to said primary ingredient being such that the carbon atoms are no greater than 15 percent of the total atoms of said compound.

Claim 13

An arc-extinguishing material consisting of a compound characterized by negligible rate of reformation after decomposition, a first ionization potential no less than 7.54 electron volts, a boiling temperature no greater than 2,000* C, for which decomposition is an endothermic process, having thermal conductivity of at least one-thousandth of a calorie per second per square centimeter per degree Centigrade per centimeter, said compound comprising a primary ingredient and a binder, said primary ingredient including an element selected from a class consisting of silver, tantalum, copper, rhenium, tungsten, boron, palladium, tellurium, zinc and selenium, said binder being a silicone resin, the carbon content and proportion thereof relative to said primary ingredient being such that the carbon atoms are no greater than 15 percent of the total atoms of said compound.