Liquid fuel heater improvement

Claim 2

In a liquid fuel heater including a granular refactory block, two ports extending into the refactory block, a fuel supply means delivering fuel to said refactory block through a first of said ports, and means conveying air under pressure to penetrate said refactory block and vaporize the fuel delivered to the refactory block, an improvement in said liquid fuel heater comprising a cavity disposed entirely within the said refactory block, said two relatively adjacent ports terminating in said cavity, asbestos wick material positioned within said cavity, and igniter means supported adjacent to said asbestos wick material within a second of said ports.

Claim 3

The liquid fuel heater according to claim 1 in which the refactory block includes intersticial pores therein and the said cavity is characterized by dimensions substantially greater than the intersticial pores of said refactory block.

Claim 4

In a liquid fuel heater including a granular refactory block, a fuel supply means, air conveying means and an electrical resistance igniter, an improvement in the refactory block comprising said refactory block having a plurality of intersticial pores, a cavity disposed within said refactory block of a substantial size relative to one of said intersticial pores, a first port extending from the surface of said refactory block to said cavity receiving liquid fuel delivered by said fuel supply means, a second port extending from the surface of said refactory block into said cavity receiving said electrical resistance igniter and an asbestos wick positioned within said cavity absorbing liquid fuel delivered to said refactory block by said fuel supply means.

Claim 5

In a liquid fuel heater including a granular refactory block, a fuel supply means, air conveying means and an electrical resistance igniter, an improvement in the refactory block comprising said refactory block having a plurality of intersticial pores, a cavity disposed within said refactory block of a substantial size relative to one of said intersticial pores, a first port extending from the surface of said refactory block to said cavity receiving liquid fuel delivered by said fuel supply means, a second port extending from the surface of said refactory block into said cavity receiving said electrical resistance igniter and an asbestos wick positioned within said cavity absorbing liquid fuel delivered to said refactory block by said fuel supply means.

Claim 6

The liquid fuel heater according to claim 3 in which the electrical resistance igniter is positioned adjacent to said asbestos wick and ignites the fuel absorbed by said asbestos wick upon the energization of said electrical resistance igniter.

Claim 9

A liquid fuel heater comprising a granular porous refactory block having intersticial cavities present therein, two relatively adjacent ports extending from the surface of the refactory block and terminating within the refactory block, a fuel supply means delivering liquid fuel to the intersticial cavities of said refactory block through a first one of said ports, means conveying air under pressure to penetrate said refactory block resulting in vaporization of said fuel delivered thereto, a cavity of a substantial size relative to said intersticial cavities disposed within said refactory block, Said ports terminating within said cavity, an asbestos wick positioned within said cavity, said asbestos wick absorbing a quantity of said fuel delivered to said refactory block, an electrical resistance igniter positioned within a second of said ports adjacent to said asbestos wick, and said electrical resistance igniter causing combustion of the fuel absorbed by said asbestos wick to thereby heat the said refactory block and assist in total combustion of the fuel delivered to said refactory block.

Claim 10

A liquid fuel heater comprising a granular porous refactory block having intersticial cavities present therein, two relatively adjacent ports extending from the surface of the refactory block and terminating within the refactory block, a fuel supply means delivering liquid fuel to the intersticial cavities of said refactory block through a first one of said ports, means conveying air under pressure to penetrate said refactory block resulting in vaporization of said fuel delivered thereto, a cavity of a substantial size relative to said intersticial cavities disposed within said refactory block, Said ports terminating within said cavity, an asbestos wick positioned within said cavity, said asbestos wick absorbing a quantity of said fuel delivered to said refactory block, an electrical resistance igniter positioned within a second of said ports adjacent to said asbestos wick, and said electrical resistance igniter causing combustion of the fuel absorbed by said asbestos wick to thereby heat the said refactory block and assist in total combustion of the fuel delivered to said refactory block.

Claim 11

The liquid fuel heater according to claim 6 in which the electrical resistance igniter comprises a plurality of coils of electrically conducting, high resistance wire.

Claim 12

The liquid fuel heater according to claim 7 in which the electrical resistance igniter is positioned that the said plurality of coils extend only partially into the second of said ports whereby the fuel absorbed by said asbestos wick is ignited and sustained to heat the entire refactory block.