US2010151398A1PendingUtilityA1
Gas fire ember element
Est. expiryMay 18, 2027(~0.8 yrs left)· nominal 20-yr term from priority
Inventors:Robert S. Smith
F24C 3/006F23D 14/145F23D 2212/20
56
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Claims
Abstract
A gas fire ember element comprises a bundle of wire of a heat and oxidation resistant metal (Fecralloy® or Nichrome®, for example). The density of wire in the bundle is so loose (between 0.01 and 0.1% by total volume of the bundle) that burning gas percolates through it. The wire has a filament cross section of between 500 μm2 and 8,000 μm2. so that it quickly glows and stops glowing as it is heated or not heated by flickering gas flame. The bundle can be hollow, said wire being confined to a surface region of the bundle having a thickness between 50 μm and 5,000 μm. Either the density of wire in the surface region is between 0.01% and 0.1% by total volume of the surface region, or a projection of the wire in the surface region occupies between 0.01% and 0.1% by total area of said projection. The wire in the surface region may be a mesh.
Claims
exact text as granted — not AI-modified1 . An ember element for use in domestic gas fires comprising a bundle of wire of a heat and oxidation resistant metal, the density of wire in the bundle being between 0.005% and 0.5% by total volume of the bundle and the wire having a filament cross section of between 500 μm 2 and 10,000 μm 2 .
2 . An ember element for use in domestic gas fires comprising a bundle of wire of a heat and oxidation resistant metal, the wire having a filament cross section of between 500 μm 2 and 10,000 μm 2 , wherein said bundle is hollow, at least 70% of said wire being confined to a surface region of the bundle having a thickness between 50 μm and 5,000 μm wherein the density of wire in the surface region is between 0.005% and 0.75% by total volume of the surface region.
3 . An ember element for use in domestic gas fires comprising a bundle of wire of a heat and oxidation resistant metal, the wire having a filament cross section of between 500 μm 2 and 10,000 μm 2 , wherein said bundle is hollow, at least 70% of said wire being confined to a surface region of the bundle having a thickness between 50 μm and 5,000 μm, wherein a projection of the wire in the surface region occupies between 0.005% and 0.75% by total area of said projection.
4 . An ember element as claimed in claim 1 , in which said bundle comprises only said wire.
5 . An ember element as claimed in claim 1 , in which said bundle is formed on a frame that gives rigidity to the bundle.
6 . An ember element as claimed in claim 5 , in which said frame is constructed from a mesh to support the bundle.
7 . An ember element as claimed in claim 1 , in which said metal is an alloy of iron, chromium, aluminium and yttrium and/or zirconium.
8 . An ember element as claimed in claim 7 , in which the components of said alloy are in the proportions:
Cr
15-25
Al
3-10
Y
0.1 to 1
Zr
0 to 1
Fe
Balance
9 . An ember element as claimed in claim 1 , in which said metal is an alloy of nickel and chromium.
10 . An ember element as claimed in claim 9 , in which said alloy has between 55% and 85% of nickel and 15% and 45% of chromium.
11 . An ember element as claimed in claim 1 , in which said wire has a cross-section of between 2000 μm 2 and 5000 μm 2 .
12 . An ember element as claimed in claim 11 , in which said wire has a cross section of between 3500 μm 2 and 4000 μm 2 .
13 . An ember element as claimed in claim 1 , in which said wire has a round cross section and a diameter between 50 μm and 80 μm.
14 . An ember element as claimed in claim 1 , in which said density is between 0.01% to 0.4% by volume.
15 . An ember element as claimed in claim 1 , in which said wire is a single wire filament tangled into a ball.
16 . An ember element as claimed in claim 1 , in which said bundle is a plurality of wire filaments of lengths between 30 mm and 300 mm.
17 . An ember element as claimed in claim 1 , in which said bundle has a volume between 0.5 cm 3 and 8000 cm 3 .
18 . An ember element as claimed in claim 1 , in which said bundle is given a regular geometric shape.
19 . An ember element as claimed in claim 18 , in which said shape is tetrahedral.
20 . An ember element as claimed in claim 1 , in which the wire has an oxidation catalyst coating.
21 . An ember element as claimed in claim 20 , in which the catalyst is platinum.
22 . An ember element for a gas fire as claimed in claim 17 , in which said bundle has a volume between 1 cm 3 and 500 cm 3 .
23 . An ember element as claimed in claim 22 , in which said bundle has a volume between 5 cm 3 and 50 cm 3 .
24 . An ember element as claimed in claim 14 , in which said density is between 0.03% and 0.3% by volume.
25 . An ember element as claimed in claim 2 , in which said metal is an alloy of iron, chromium, aluminium and yttrium and/or zirconium.
26 . An ember element as claimed in claim 22 , in which the components of said alloy are in the proportions:
Cr
15-25
Al
3-10
Y
0.1 to 1
Zr
0 to 1
Fe
Balance
27 . An ember element as claimed in claim 2 , in which said wire has a cross section of between 3500 μm2 and 4000 μm2.
28 . An ember element as claimed in claim 2 , in which said density is between 0.01% to 0.4% by volume.
29 . An ember element as claimed in claim 28 , in which said density is between 0.03% and 0.3%.
30 . An ember element as claimed in claim 2 , in which said bundle has a volume between 0.5 cm 3 and 8000 cm 3 .
31 . An ember element as claimed in claim 30 , in which said bundle has a volume between 1 cm 3 and 500 cm 3 .
32 . An ember element as claimed in claim 31 , in which said bundle has a volume between 5 cm 3 and 50 cm 3 .
33 . An ember element as claimed in claim 3 , in which said metal is an alloy of iron, chromium, aluminium and yttrium and/or zirconium.
34 . An ember element as claimed in claim 33 , in which the components of said alloy are in the proportions:
Cr
15-25
Al
3-10
Y
0.1 to 1
Zr
0 to 1
Fe
Balance
35 . An ember element as claimed in claim 3 , in which said wire has a cross section of between 3500 μm2 and 4000 μm2.
36 . An ember element as claimed in claim 3 , in which said density is between 0.01% to 0.4% by volume.
37 . An ember element as claimed in claim 36 , in which said density is between 0.03% and 0.3% by volume.
38 . An ember element as claimed in claim 3 , in which said bundle has a volume between 0.5 cm 3 and 8000 cm 3 .
39 . An ember element as claimed in claim 38 , in which said bundle has a volume between 1 cm 3 and 500 cm 3 .
40 . An ember element as claimed in claim 39 , in which said bundle has a volume between 5 cm 3 and 50 cm 3 .Cited by (0)
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