Patent US3782881A successfully refreshed from Google Patents.
US3782881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas burner protective apparatus
Assignee: Trane US Inc
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Filing: 1971-11-09
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Granted: 1974-01-01
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Expires: 1991-11-09
Abstract
Abstract Covers a power gas burner supply system embodying apparatus for detecting and responding to any predetermined reduction in the volume of air supplied with the gas to the burner system. The detecting apparatus may include a hollow pipe one end of which senses the air flow which is transmitted to the burner system, and a pressure-actuated diaphragm swtich is coupled to the other end of the hollow pipe. The diaphragm, which is normally deflected when the air supply is adequate, is subjected to a change in deflection as the volume of air falls off. The switch may be used to trigger the removal of the gas furnish to the burner system as the deflection changes sufficiently. By maintaining the supply of air above a predetermined level, the burner system is continuously maintained in a satisfactory operating condition and the production of carbon monoxide by the burner system is virtually eliminated.
Inventors
- 👤 H Feeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:44
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/72
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
187 words
Protective apparatus for a power burner system having a conduit into which air and gaseous fuel are separately fed to the conduit at two points spaced from each other, the apparatus including a hollow tube having a single passage responding solely to static and velocity pressures of the air fed into the conduit, one end of which is pointed toward the source of air so that it senses the pressure changes corresponding to the velocity changes of the air moving in said conduit in the direction of the burner system, the pressurized air to be mixed with the gaseous fuel for the burner system, and switch mechanism means having a diaphragm which is coupled to the other end of the hollow tube so that only the incoming pressurized air may be applied to the diaphragm so that it may be deflected solely in accordance with the pressure of the air against the diaphragm, thereby to maintain at least a predetermined volume of air flowing in said conduit and to interrupt the supply of gaseous fuel when the volume of air supplied recedes below said predetermined volume rate.
Claim 2
Dependent Claim
187 words
Protective apparatus for a power burner system having a conduit into which air and gaseous fuel are separately fed to the conduit at two points spaced from each other, the apparatus including a hollow tube having a single passage responding solely to static and velocity pressures of the air fed into the conduit, one end of which is pointed toward the source of air so that it senses the pressure changes corresponding to the velocity changes of the air moving in said conduit in the direction of the burner system, the pressurized air to be mixed with the gaseous fuel for the burner system, and switch mechanism means having a diaphragm which is coupled to the other end of the hollow tube so that only the incoming pressurized air may be applied to the diaphragm so that it may be deflected solely in accordance with the pressure of the air against the diaphragm, thereby to maintain at least a predetermined volume of air flowing in said conduit and to interrupt the supply of gaseous fuel when the volume of air supplied recedes below said predetermined volume rate.
Claim 3
Dependent Claim
33 words
Protective apparatus for a burner system according to claim 1, such apparatus being connected to a blower for supplying air to the conduit in a predetermined volume rate and at a predetermined pressure.
Claim 4
Dependent Claim
42 words
Protective apparatus for a burner system according to claim 1, in which the hollow tube is bent at substantially a 90* angle so that its sensing end is essentially pointed directly toward the air supply source to receive only the incoming air.
Claim 5
Dependent Claim
159 words
Apparatus for preventing the formation of a substantial amount of carbon monoxide in a burner system supplied by a mixture of air and gaseous fuel, comprising a conduit to which the air and gaseous fuel are supplied at different points along the conduit, a hollow pipe having a single fluid passage therein, one end of which is inserted in said conduit and transmits only the pressure changes corresponding principally to the changes of velocity of the air which flows in said conduit in the direction of the burner system for mixture with the gaseous fuel, and means responsive to the air pressure within the pipe receding below a predetermined value for interrupting the flow of gaseous fuel to the burner system, said means including a diaphragm against which said air pressure alone is directed and responds solely to the pressure of the air within said pipe and a solenoid for controlling the gaseous fuel flow to the burner system.
Claim 6
Dependent Claim
159 words
Apparatus for preventing the formation of a substantial amount of carbon monoxide in a burner system supplied by a mixture of air and gaseous fuel, comprising a conduit to which the air and gaseous fuel are supplied at different points along the conduit, a hollow pipe having a single fluid passage therein, one end of which is inserted in said conduit and transmits only the pressure changes corresponding principally to the changes of velocity of the air which flows in said conduit in the direction of the burner system for mixture with the gaseous fuel, and means responsive to the air pressure within the pipe receding below a predetermined value for interrupting the flow of gaseous fuel to the burner system, said means including a diaphragm against which said air pressure alone is directed and responds solely to the pressure of the air within said pipe and a solenoid for controlling the gaseous fuel flow to the burner system.
Claim 7
Dependent Claim
68 words
Apparatus for preventing the formation of a substantial amount of carbon monoxide in a burner system according to claim 4, including a blower for feeding air to the burner system at a predetermined pressure above atmospheric pressure so that the pressure within the pipe will be equal to or above the value at which the diaphragm responds to interrupt the flow of gaseous fuel to the burner system.
Claim 8
Dependent Claim
75 words
Apparatus for preventing the formation of a substantial amount of carbon monoxide in a burner system according to claim 5, in which the hollow pipe is bent at substantially a 90* angle so that one end thereof is pointed toward the blower so as to respond essentially exclusively to the pressure of the air fed by the blower to the burner system and its other end is coupled to the diaphragm to deflect the diaphragm.
Claim 9
Dependent Claim
70 words
Apparatus for preventing the formation of a substantial amount of carbon monoxide in a burner system according to claim 6, including a valve for the control of the flow of gaseous fuel to the burner system, and means for coupling the diaphragm to the valve to operate the valve to cut off the flow of gaseous fuel to the burner system when the diaphragm is deflected by a predetermined amount.
Claim 10
Dependent Claim
140 words
A gas and air supply system for a power burner comprising, in addition to the burner, a conduit through which the gaseous fuel and air may be fed to the burner at different points along the coNduit, a solenoid valve for controlling the flow of gaseous fuel to the conduit, a bent hollow pipe having a single passage, one end of which is inserted into the conduit for responding principally to the air pressure changes corresponding to the velocity of the air flowing through the conduit to the burner, and a diaphragm switch coupled between the other end of said pipe and said valve for closing the valve to stop the flow of gaseous fuel therethrough when the pressure of the air supplied to the pipe falls below a predetermined value regardless of the presence or absence of gaseous fuel.
Claim 11
Dependent Claim
140 words
A gas and air supply system for a power burner comprising, in addition to the burner, a conduit through which the gaseous fuel and air may be fed to the burner at different points along the coNduit, a solenoid valve for controlling the flow of gaseous fuel to the conduit, a bent hollow pipe having a single passage, one end of which is inserted into the conduit for responding principally to the air pressure changes corresponding to the velocity of the air flowing through the conduit to the burner, and a diaphragm switch coupled between the other end of said pipe and said valve for closing the valve to stop the flow of gaseous fuel therethrough when the pressure of the air supplied to the pipe falls below a predetermined value regardless of the presence or absence of gaseous fuel.
Claim 12
Dependent Claim
68 words
A gas and air supply system for a burner according to claim 8, in which the hollow pipe is bent at substantially a 90* angle so that the end thereof which is inserted into the conduit is upstream of the point in the conduit at which gaseous fuel is supplied to the conduit and is pointed in the general direction of the flow of air through the conduit.
Claim 13
Dependent Claim
69 words
A gas and air supply system for a burner according to claim 8, in which gaseous fuel is fed to the burner through a nozzle pointed toward the burner, the dimensions of the nozzle and the conduit being so related that the ratio of the volume of air to the volume of gaseous fuel supplied to the burner will be substantially constant during wide changes in the air volume.
Claim 14
Dependent Claim
140 words
A protective system to protect a power gaseous fuel burner against the production of carbon monoxide beyond a predetermined safe level, comprising a conduit coupled to the gaseous fuel burner, a bent pipe having a single passage which has one end within the conduit and pointed toward the direction from which air is fed into the conduit to develop air pressure changes corresponding principally and substantially solely to the air velocity changes in the cOnduit, a solenoid valve for controlling the flow of gaseous fuel into the conduit to be mixed with the air fed into the conduit, the mixture of air and gaseous fuel being supplied through the conduit to the burner, and a diaphragm switch coupling the solenoid valve to the end of the pipe which is outside the onduit to control the operation of the solenoid valve.
Claim 15
Dependent Claim
140 words
A protective system to protect a power gaseous fuel burner against the production of carbon monoxide beyond a predetermined safe level, comprising a conduit coupled to the gaseous fuel burner, a bent pipe having a single passage which has one end within the conduit and pointed toward the direction from which air is fed into the conduit to develop air pressure changes corresponding principally and substantially solely to the air velocity changes in the cOnduit, a solenoid valve for controlling the flow of gaseous fuel into the conduit to be mixed with the air fed into the conduit, the mixture of air and gaseous fuel being supplied through the conduit to the burner, and a diaphragm switch coupling the solenoid valve to the end of the pipe which is outside the onduit to control the operation of the solenoid valve.
Claim 16
Dependent Claim
28 words
A protective system according to claim 11 in which a gaseous fuel regulator controls the pressure of the gaseous fuel supplied through the solenoid valve to the conduit.
Claim 17
Dependent Claim
72 words
A protective system according to claim 12, in which a nozzle is positioned within the conduit for feeding gaseous fuel to the burner, the area of the opening of the nozzle and the area of the transmission section of the conduit bearing a predetermined ratio so that the volume of the gaseous fuel will be proportioned to the volume of the air without change, notwithstanding changes in the volume of the air.
Claim 18
Dependent Claim
18 words
A protective system according to claim 13, including a blower for pressurizing the air supplied to the conduit.
Claim 19
Dependent Claim
104 words
Apparatus for substantially preventing the formation of carbon monoxide in a power burner system, comprising a gaseous fuel valve control mechanism coupled to a conduit through which air and gaseous fuel are fed to the burner system, said mechanism including a single tubular bent path which is simultaneously affected only by the velocity and static air pressures within the conduit, and means to operate said mechanism when the total air pressure in the conduit exceeds a predetermined value and to release said mechanism and to stop the flow of gaseous fuel when the total air pressure within the conduit recedes below said predetermined value.
Claim 20
Dependent Claim
104 words
Apparatus for substantially preventing the formation of carbon monoxide in a power burner system, comprising a gaseous fuel valve control mechanism coupled to a conduit through which air and gaseous fuel are fed to the burner system, said mechanism including a single tubular bent path which is simultaneously affected only by the velocity and static air pressures within the conduit, and means to operate said mechanism when the total air pressure in the conduit exceeds a predetermined value and to release said mechanism and to stop the flow of gaseous fuel when the total air pressure within the conduit recedes below said predetermined value.
Claim 21
Dependent Claim
23 words
Apparatus according to claim 15 in which the means to operate the mechanism includes a diaphragm which responds to the total air pressure.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |