US3646927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas smooth top range
Assignee: White Consolidated Industries Inc
•
Filing: 1970-06-15
•
Granted: 1972-03-07
•
Expires: 1990-06-15
Abstract
Abstract The range has plural radiant burners with individually associated heat exchangers and a common pressurized exhaust system. Each burner has a supply air tube the inlet end of which is obstructed by a coil spring which is variably expanded to act as an adjustable shutter regulating the amount of air that enters through its turns in response to actuation of the gas control valve for the burner. The burners have center simmer sections for low heat and single gas lines with port controlled terminals which variably direct the gas to the center simmer sections or to the main burner sections depending upon the rate of delivery of the same. A safety circuit prevents flow of gas to the range except when exhaust fans are properly operating, and a taut wire exposed to heating by all burners expands when any is above a selected temperature to signal such condition.
Inventors
- 👤 Richard L Perl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/04; F24C3/047; F24C3/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
124 words
A gas smooth top range, comprising a plurality of gas burners, enclosure means therefor including an imperforate top plate for support of cooking utensils on the same above the burners, gaseous fuel and air supply lines connected to the burners, control valves operative in the fuel supply lines for user actuation to regulate the burners respectively, and individual heat exchanger means associated with the burners for cooling the hot gases discharged by the same and preheating the air supplied thereto for combustion, each heat exchanger means comprising boundary surfaces against the opposite sides of which the hot gases and combustion air are caused respectively to flow, with such surfaces having spaced annular portions over which the flows proceed radially in traversing the exchanger means.
Claim 2
Dependent Claim
124 words
A gas smooth top range, comprising a plurality of gas burners, enclosure means therefor including an imperforate top plate for support of cooking utensils on the same above the burners, gaseous fuel and air supply lines connected to the burners, control valves operative in the fuel supply lines for user actuation to regulate the burners respectively, and individual heat exchanger means associated with the burners for cooling the hot gases discharged by the same and preheating the air supplied thereto for combustion, each heat exchanger means comprising boundary surfaces against the opposite sides of which the hot gases and combustion air are caused respectively to flow, with such surfaces having spaced annular portions over which the flows proceed radially in traversing the exchanger means.
Claim 3
Dependent Claim
63 words
A gas smooth top range as set forth in claim 1, wherein the burners are provided with heat bridges between port sections of the same and their respective fuel supply lines to raise the temperature of the fuel delivered through the latter and thereby effect a relative reduction in the weight of the fuel with increase in the operating temperature of the burner.
Claim 4
Dependent Claim
43 words
A gas smooth top range as set forth in claim 1, wherein the air supply lines to the burners include variable air inlet controls coupled to the fuel control valves for automatic adjustment of the former in response to actuation of the latter.
Claim 5
Dependent Claim
61 words
The combination set forth in claim 10, wherein the burner has a fuel supply line, and a heat bridge is provided between an operating part of the burner and said fuel supply line to raise the temperature of the fuel delivered through the latter and thereby effect a relative reduction in its weight as the operating temperature of the burner increases.
Claim 6
Dependent Claim
27 words
A gas smooth top range as set forth in claim 1, wherein each exchanger means includes baffling for producing a swirling movement of the combustion airflow therethrough.
Claim 7
Dependent Claim
37 words
A gas smooth top range as set forth in claim 5, wherein the gas supply lines to the burners deliver the fuel to intermediate locations within the heat exchanger means for mixing with the swirling airflow therein.
Claim 8
Dependent Claim
54 words
A gas smooth top range as set forth in claim 6, wherein the burners have center simmer port sections and outer main port sections, and the gas supply lines include low velocity passages for conveying the fuel substantially directly to such simmer sections automatically when the fuel delivery velocity is below a selected value.
Claim 9
Dependent Claim
27 words
A gas smooth top range as set forth in claim 7, including safety means for providing a sensible signal whenever a burner is above a predetermined temperature.
Claim 10
Dependent Claim
31 words
A gas smooth top range as set forth in claim 8, including blower means at the exhaust side of the burners for establishing the flows of hot gases and combustion air.
Claim 11
Dependent Claim
79 words
In a combined gas burner and heat exchanger, means for establishing an outflow of the hot gases from the burner through one exchanger section in generally radial flow reversely over a succession of annular boundary elements forming one side of the section, and means for delivering combustion air to the burner through another exchanger section in a swirling advance over said boundary elements at the side opposite said one side to cool the outflow and preheat the combustion air.
Claim 12
Dependent Claim
79 words
In a combined gas burner and heat exchanger, means for establishing an outflow of the hot gases from the burner through one exchanger section in generally radial flow reversely over a succession of annular boundary elements forming one side of the section, and means for delivering combustion air to the burner through another exchanger section in a swirling advance over said boundary elements at the side opposite said one side to cool the outflow and preheat the combustion air.
Claim 13
Dependent Claim
27 words
The combination set forth in claim 10, wherein gaseous fuel supply means is included for delivering such fuel to the swirling flow of air within the exchanger.
Claim 14
Dependent Claim
168 words
In gas smooth top range structure including a gas radiant burner, a top plate over the burner made of a glass material which does not experience appreciable thermal expansion in operation of the range, and control means for regulating operation of the burner; the improvement which comprises safety means for indicating to a user a burner temperature above a predetermined value regardless of the setting of said control means, said safety means including cooperable switch members having two conditions of adjustment, one of said members being fixed and the other movable relative to the top plate, actuating means for said other member having an appreciable temperature coefficient of expansion and being exposed to heat produced by the burner, with such heating of the actuating means above a selected degree causing sufficient movement of said other member relative to the one member to alter the condition of adjustment thereof, and means responsive to such change of adjustment of the switch members to provide a sensible signal to the user.
Claim 15
Dependent Claim
168 words
In gas smooth top range structure including a gas radiant burner, a top plate over the burner made of a glass material which does not experience appreciable thermal expansion in operation of the range, and control means for regulating operation of the burner; the improvement which comprises safety means for indicating to a user a burner temperature above a predetermined value regardless of the setting of said control means, said safety means including cooperable switch members having two conditions of adjustment, one of said members being fixed and the other movable relative to the top plate, actuating means for said other member having an appreciable temperature coefficient of expansion and being exposed to heat produced by the burner, with such heating of the actuating means above a selected degree causing sufficient movement of said other member relative to the one member to alter the condition of adjustment thereof, and means responsive to such change of adjustment of the switch members to provide a sensible signal to the user.
Claim 16
Dependent Claim
47 words
Gas smooth top range structure as set forth in claim 12, wherein there is at least one additional burner beneath the top plate with separate control means, and the actuating means is commonly associated with the plural burners to indicate the predetermined heated condition of any one.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |