Safety pilot enclosure having flame-diverting air inlet
阅读：951发布：2023-02-15
专利汇可以提供Safety pilot enclosure having flame-diverting air inlet专利检索，专利查询，专利分析的服务。并且A gust-protecting safety pilot enclosure utilizes a hood which directs the pilot flame in two tongues, one of which heats a thermocouple within the enclosure and the other extends slantingly through the upper portion of the enclosure wall to ignite the main burner. A horizontal air flow opening in the enclosure wall beyond the thermocouple serves, when the pilot flame height is reduced, to divert a portion of the flame from the tongue which extends toward the thermocouple to the tongue which extends toward the main burner, thereby to prefer ignition of the main burner over voltage output from the thermocouple.，下面是Safety pilot enclosure having flame-diverting air inlet专利的具体信息内容。
1. For use with gas-fired furnaces and like appliances wherein a safety pilot both ignites the gas from a main burner orifice and provides heat to a thermocouple which controls a shut-off valve to such main burner, a safety pilot comprising a thermocouple supported substantially vertically, pilot gas supply means including a substantially vertical orifice for gas only, the orifice being spaced from the thermocouple in a substantially vertical plane, and a metal flame-developing hood positioned slantingly above the pilot gas orifice and having downward-flanged edges tapering wideningly outward from a central hood indentation, whereby to develop a two-tongued forked flame, the hood being positioned at such angle to such vertical plane that one of the hood edges directs a tongue of such flame toward the thermocouple and the other edge extends angularly outward, characterized in having a sheet metal enclosure having substantially vertical side walls, whereby to shield such pilot orifice and at least the lower portions of the hood and thermocouple from horizontal air flow, one of said side walls extending between the pilot orifice and such main burner and its upper portion being presented beneath such angularly outward extending edge of the hood, further characterized in that a horizontal air flow opening extends through that side wall of the enclosure which is adjacent to the thermocouple and remote from the pilot gas orifice, whereby, if the pilot flame height lowers, inflow of air into the enclosure through said horizontal air flow opening will divert a portion of the flame from that tongue which extends toward the thermocouple to the other tongue which extends over that side wall of the enclosure separating the pilot flame from the main burner, thereby to prefer ignition of the main burner over voltage output from the thermocouple.
2. A safety pilot as defined in claim 1, wherein the said side wall of the enclosure projects above said outward-extending hood edge and has a cut-out through which said hood edge projects.
3. A safety pilot as defined in claim 1, wherein the said side wall of the enclosure projects above said outward-extending hood edge and has a cut-out through which said hood edge projects, and said cut-out has a sloping edge substantially corresponding to the slope of said hood edge, and said enclosure side wall beneath said cut-out comprises a laterally inward indented pocket, whereby to provide a gap through which may project such tongue of flame to ignite the main burner.
4. A safety pilot as defined in claim 1, wherein the horizontal air flow opening is located at substantially the elevation of that portion of the hood at which flame develops.
5. A safety pilot as defined in claim 4, wherein the enclosure is provided with an upper horizontal lip extending inwardly above said horizontal air flow opening, whereby to direct inflowing air substantially horizontally toward the thermocouple and impede upward escape of such air.
6. A safety pilot as defined in claim 1, further having a bottom for said sheet metal enclosure, in which the pilot gas orifice, flame-developing hood and thermocouple are mounted, said bottom being otherwise substantially imperforate, whereby to avoid upward gusts of air through the enclosure.
7. A safety pilot as defined in claim 1, wherein the flame-developing hood has a base portion arising from the pilot gas orifice and open opposite to the thermocouple, and wherein a pedestal shield is provided at substantially the junction of the orifice with the hood, said shield extending substantially horizontally outward from the pilot gas orifice a distance substantially equal to the height thereabove at which the hood develops the flame, whereby to avoid such upflow of air adjacent to the pilot gas orifice as might so displace the flame upward and extinguish it.
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