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US 4,045,155 AGranted
Burner system with absorbent carbon flame responsive switch
AssigneeRobertshaw Controls Company
InventorsDenis G. Wolfe, Joseph S. Danon
Life of this patent
Estimating the term…
Abstract
A thermal responsive switch employs a gas expansion operating member movable by changes in pressure of a gas charge in a chamber containing a carbonaceous adsorbent material formed from a compound of carbon and non-carbon component by removing the non-carbon component.
Claims4
A burner system comprising
- a main burner,
- an electrically operated valve for controlling the supply of fuel to the main burner,
- a pilot burner for igniting the main burner,
- a flame sensing bulb positioned to be impinged upon by a flame from the pilot burner,
- a flame switch having expandable and contractable means for opening and closing a pair of contacts in response to a gas pressure,
- a tube connecting the flame sensing bulb to the expandable and contactable means of the flame switch,
- a gas adsorbent material in the flame sensing bulb,
- a charge of gas in the sensing bulb, the tube and the expandable and contractable means,
- control means connected in series with the contacts of the switch means and the electrically operated valve for controlling the electrically operated valve, and
- the gas adsorbent material including a material selected from carbonized polyvinylidene chloride and carbonized polyvinylidene fluoride.
7 more elements
A burner system comprising
- a main burner,
- an electrically operated valve for containing the supply of fuel to the main burner,
- a pilot burner for igniting the main burner,
- a flame sensing bulb positioned to be impinged upon by a flame from the pilot burner,
- a flame switch having expandable and contractable means for opening and closing a pair of contacts in response to a gas pressure,
- a tube connecting the flame sensing bulb to the expandable and contractable means of the flame switch,
- a gas adsorbent carbonaceous material in the flame sensing bulb,
- a charge of noble gas in the sensing bulb, the tube and the expandable and contractable means,
- control means connected in series with the contacts of the switch means and the electrically operated valve for controlling the electrically operated valve, and
- said adsorbent carbonaceous material including a material selected from carbonized polyvinylidene chloride and carbonized polyvinylidene fluoride and being porous with cavities in a skeletal structure with substantially uniform inlets wherein the average width of the inlets of the cavities is within the range from 9.2 angstroms to 17 angstroms.
7 more elements
Dependencies are inferred from the claim text.