US4073186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow meter and metering systems
Assignee: Individual
•
Filing: 1976-11-01
•
Granted: 1978-02-14
•
Expires: 1996-11-01
Abstract
Abstract A meter housing including internal metering apparatus movable by fuel flowing through the housing. The metering apparatus in its driven function operates in a rotating, reciprocating or wobbling manner, and with its operation moves a permanent type magnet. The magnet is associated with a sensing device in an electrical circuit which senses the moving functions of the magnet and transmits operating cycles to a pulse receiver in the electrical circuit which in turn operates selected types of counters or read-out devices such as digital tachometers, totalizing counters, re-set counters, or the like. Importantly, the magnet is a part of the metering apparatus operating in the fluid compartment of the housing and the sensing device is disposed in another compartment in the housing close enough for influence by the magnet but completely isolated from the fuel by a fluid impervious wall, thus preventing any possibility of explosion. Also importantly, the sensing device and other components in the circuit are solid state electronic components which will withstand rugged treatment. Temperature compensating elements are employed in the measuring system. The metering apparatus can be used with various types of combustion systems, such as gas engines, Diesel engines, and various other combustion apparatuses. Furthermore, the meter may be associated with vehicles to show off-highway fuel consumption. Various types of rate designations such as gallons per hour, miles per gallon, revolutions per gallon, and other functions may also be employed. Also, an alternative form of metering apparatus is employed that meters extremely small increments to accomplish sensitive readouts.
Inventors
- 👤 Curtis L. Erwin, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:47
CPC Classifications
G; G01; G01F; G01F9/00; G01F9/001; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 62
Claim 1
Independent Claim
98 words
A flow meter for measuring fluid comprising a housing having a fluid compartment, movable measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said movable measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and indicating means responsive to the output of said pickup means indicating fluid flowing through said meter.
Claim 2
Dependent Claim
98 words
A flow meter for measuring fluid comprising a housing having a fluid compartment, movable measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said movable measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and indicating means responsive to the output of said pickup means indicating fluid flowing through said meter.
Claim 3
Dependent Claim
24 words
The flow meter of claim 1 including compensating means correcting the indications of said indicating means due to variations in temperature of the fluid.
Claim 4
Dependent Claim
29 words
The flow meter of claim 1 having means for connection into the fuel supply means of a combustion system and arranged to measure fuel consumed by the combustion system.
Claim 5
Dependent Claim
98 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, movable measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said movable measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and recording means responsive to the output of said pickup means recording fluid flowing through said meter.
Claim 6
Dependent Claim
98 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, movable measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said movable measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and recording means responsive to the output of said pickup means recording fluid flowing through said meter.
Claim 7
Dependent Claim
29 words
The flow meter of claim 4 having means for connection into the fuel supply means of a combustion system and arranged to measure fuel consumed by the combustion system.
Claim 8
Dependent Claim
98 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, rotational measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said rotational measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and indicating means responsive to the output of said pickup means indicating fluid flowing through said meter.
Claim 9
Dependent Claim
98 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, rotational measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said rotational measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and indicating means responsive to the output of said pickup means indicating fluid flowing through said meter.
Claim 10
Dependent Claim
19 words
The flow meter of claim 6 wherein said indicating means indicates the rate of fuel flowing through said meter.
Claim 11
Dependent Claim
24 words
The flow meter of claim 6 including compensating means correcting the indications of said indicating means due to variations in temperature of the fluid.
Claim 12
Dependent Claim
38 words
The flow meter of claim 6 including sensing means sensing the temperature of the fluid, and compensating means responsive to said sensing means correcting the output of said pickup means due to variations in temperature of the fluid.
Claim 13
Dependent Claim
29 words
The flow meter of claim 6 having means for connection into the fuel supply means of a combustion system and arranged to measure fuel consumed by the combustion system.
Claim 14
Dependent Claim
98 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, rotational measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said rotational measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means bing disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and recording means responsive to the output of said pickup means recording fluid flowing through said meter.
Claim 15
Dependent Claim
98 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, rotational measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said rotational measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means bing disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and recording means responsive to the output of said pickup means recording fluid flowing through said meter.
Claim 16
Dependent Claim
19 words
The flow meter of claim 11 wherein said indicating means indicates the rate of fuel flowing through said meter.
Claim 17
Dependent Claim
24 words
The flow meter of claim 11 including compensating means correcting the recording of said recording means due to variations in temperature of the fluid.
Claim 18
Dependent Claim
38 words
The flow meter of claim 11 including sensing means sensing the temperature of the fluid, and compensating means responsive to said sensing means correcting the output of said pickup means due to variations in temperature of the fluid.
Claim 19
Dependent Claim
29 words
The flow meter of claim 11 having means for connection into the fuel supply means of a combustion system and arranged to measure fuel consumed by the combustion system.
Claim 20
Dependent Claim
129 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, movable measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, sensing means sensing the temperature of the fluid, compensating means responsive to said sensing means correcting the output of said pickup means due to variations in temperature of the fluid, and indicating means responsive to the compensated output indicating the temperature compensated measurement of fluid flowing through the meter.
Claim 21
Dependent Claim
129 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, movable measuring means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment operably connected with said measuring means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, sensing means sensing the temperature of the fluid, compensating means responsive to said sensing means correcting the output of said pickup means due to variations in temperature of the fluid, and indicating means responsive to the compensated output indicating the temperature compensated measurement of fluid flowing through the meter.
Claim 22
Dependent Claim
29 words
The flow meter of claim 16 having means for connection into the fuel supply means of a combustion system and arranged to measure fuel consumed by the combustion system.
Claim 23
Dependent Claim
91 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, movable means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment, an electric circuit, solid state magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and indicating means responsive to the output of said pickup means indicating fluid flowing through said meter.
Claim 24
Dependent Claim
91 words
A flow meter for measuring fluids comprising a housing having a fluid compartment, movable means in said fluid compartment arranged to be operated by the fluid flow, magnet means in said fluid compartment, an electric circuit, solid state magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and indicating means responsive to the output of said pickup means indicating fluid flowing through said meter.
Claim 25
Dependent Claim
14 words
The flow meter of claim 18 wherein said meter comprises a slow flow meter.
Claim 26
Dependent Claim
19 words
The flow meter of claim 18 wherein said indicating means indicates the rate of fuel flowing through said meter.
Claim 27
Dependent Claim
19 words
The flow meter of claim 18 wherein said indicating means totalizes the amount of fuel flowing through said meter.
Claim 28
Dependent Claim
14 words
The flow meter of claim 18 including means recording the measurements of said meter.
Claim 29
Dependent Claim
33 words
The flow meter of claim 18 wherein said housing includes a second compartment separated from said fluid compartment by fluid impervious wall means, said magnetic pickup means being disposed in said second compartment.
Claim 30
Dependent Claim
38 words
The flow meter of claim 18 including sensing means sensing the temperature of the fluid, and compensating means responsive to said sensing means correcting the output of said pickup means due to variations in temperature of the fluid.
Claim 31
Dependent Claim
87 words
The flow meter of claim 18 arranged for use with a fuel measuring system for a vehicle driven by an internal combustion means and having a fuel supply, the vehicle having shiftable operating means, said measuring system including switch means in said circuit arranged to be operably movable to open and closed positions by said shiftable operating means and controlling said indicating means, said indicating means being responsive to a selected positioning of said switch in one of its positions to indicate fuel flowing through said meter.
Claim 32
Dependent Claim
103 words
The flow meter of claim 18 arranged for use with a fuel measuring system for a vehicle driven by an internal combustion means and having a fuel supply, the vehicle having shiftable operating means, said measuring system including switch means in said circuit arranged to be operably movable to open and closed positions by said shiftable operating means and controlling said indicating means, said indicating means being responsive to a selected positioning of said switch in one of its positions to indicate fuel flowing through said meter, and second indicating means responsive to said pickup means indicating total fuel flowing through said meter.
Claim 33
Dependent Claim
79 words
The flow meter of claim 18 arranged for use with a fuel measuring system for a vehicle driven by an internal combustion means and having a fuel supply, the vehicle having two sets of brakes, said measuring system including a pair of switch means in said circuit arranged to be operably movable to open and closed positions by respective brakes and controlling said indicating means, said indicating means being responsive to one or the other of said switch means.
Claim 34
Dependent Claim
62 words
The flow meter of claim 18 wherein said movable means comprises a cylinder and plunger assembly having reciprocative movement in said cylinder by fuel flowing through said housing, and adjustable stop means in said housing at each of the ends of the reciprocating movement of said plunger assembly, said stop means being adjustable to vary the limits of movement of said plunger.
Claim 35
Dependent Claim
58 words
The flow meter of claim 18 arranged for use with a fuel measuring system and a combustion means in which a portion of the fuel fed thereto is unburned and including a return line from the combustion means arranged to recirculate fuel back to the combustion means, and treatment means having means for connection in the measuring system.
Claim 36
Dependent Claim
15 words
The flow meter of claim 18 wherein said meter comprises an oscillating piston type meter.
Claim 37
Dependent Claim
22 words
The flow meter of claim 18 including valved air bleeder means leading from said fluid compartment to the exterior of said housing.
Claim 38
Dependent Claim
29 words
The flow meter of claim 18 having means for connection into the fuel supply means of a combustion system and arranged to measure fuel consumed by the combustion system.
Claim 39
Dependent Claim
116 words
A flow meter for measuring fluids, said flow meter comprising a housing having a fluid compartment, piston in said fluid compartment driven reciprocally by the flow of fluid through the meter, a fluid reversing snap action type valve operated by said piston, drive means operated by said piston, magnet means in said fluid compartment operated by said drive means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and indicating means responsive to the output of said pickup means indicating fluid flowing through said meter.
Claim 40
Dependent Claim
116 words
A flow meter for measuring fluids, said flow meter comprising a housing having a fluid compartment, piston in said fluid compartment driven reciprocally by the flow of fluid through the meter, a fluid reversing snap action type valve operated by said piston, drive means operated by said piston, magnet means in said fluid compartment operated by said drive means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and indicating means responsive to the output of said pickup means indicating fluid flowing through said meter.
Claim 41
Dependent Claim
14 words
The flow meter of claim 33 wherein said meter comprises a slow flow meter.
Claim 42
Dependent Claim
19 words
The flow meter of claim 33 wherein said indicating means indicates the rate of fluid flowing through said meter.
Claim 43
Dependent Claim
19 words
The flow meter of claim 33 wherein said indicating means totalizes the amount of fluid flowing through said meter.
Claim 44
Dependent Claim
14 words
The flow meter of claim 33 including means recording the measurements of said meter.
Claim 45
Dependent Claim
33 words
The flow meter of claim 33 wherein said housing includes a second compartment separated from said fluid compartment by fluid impervious wall means, said magnetic pickup means being disposed in said second compartment.
Claim 46
Dependent Claim
38 words
The flow meter of claim 33 including sensing means sensing the temperature of the fluid, and compensating means responsive to said sensing means correcting the output of said pickup means due to variations in temperature of the fluid.
Claim 47
Dependent Claim
87 words
The flow meter of claim 33 arranged for use with a fuel measuring system for a vehicle driven by an internal combustion means and having a fuel supply, the vehicle having shiftable operating means, said measuring system including switch means in said circuit arranged to be operably movable to open and closed positions by said shiftable operating means and controlling said indicating means, said indicating means being responsive to a selected positioning of said switch in one of its positions to indicate fuel flowing through said meter.
Claim 48
Dependent Claim
103 words
The flow meter of claim 33 arranged for use with a fuel measuring system for a vehicle driven by an internal combustion means and having a fuel supply, the vehicle having shiftable operating means, said measuring system including switch means in said circuit arranged to be operably movable to open and closed positions by said shiftable operating means and controlling said indicating means, said indicating means being responsive to a selected positioning of said switch in one of its positions to indicate fuel flowing through said meter, and second indicating means responsive to said pickup means indicating total fuel flowing through said meter.
Claim 49
Dependent Claim
79 words
The flow meter of claim 33 arranged for use with a fuel measuring system for a vehicle driven by an internal combustion means and having a fuel supply, the vehicle having two sets of brakes, said measuring system including a pair of switch means in said circuit arranged to be operably movable to open and closed positions by respective brakes and controlling said indicating means, said indicating means being responsive to one or the other of said switch means.
Claim 50
Dependent Claim
39 words
The flow meter of claim 33 including adjustable stop means in said housing at each of the ends of the reciprocating movement of said piston, said stop means being adjustable to vary the limits of movement of said piston.
Claim 51
Dependent Claim
58 words
The flow meter of claim 33 arranged for use with a fuel measuring system and a combustion means in which a portion of the fuel fed thereto is unburned and including a return line from the combustion means arranged to recirculate fuel back to the combustion means, and treatment means having means for connection in the measuring system.
Claim 52
Dependent Claim
29 words
The flow meter of claim 33 having means for connection into the fuel supply means of a combustion system and arranged to measure fuel consumed by the combustion system.
Claim 53
Dependent Claim
145 words
A flow meter arranged for use with an engine which produces output functions and which has fuel supply means, said flow meter comprising a housing having a fluid compartment, movable means in said fluid compartment arranged to be operated by the flow of fuel in the fuel supply means, magnet means in said fluid compartment, an electric circuit, solid state magnetic pickup means in said circuit actuated by said magnet means, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, means operative with said movable means providing influence of said magnet means on said pickup means, sensing means arranged to sense the engine functions, and means responsive to the measurement of the meter and said sensing means and arranged to provide an output comprising the amount of fuel used per unit of distance.
Claim 54
Dependent Claim
145 words
A flow meter arranged for use with an engine which produces output functions and which has fuel supply means, said flow meter comprising a housing having a fluid compartment, movable means in said fluid compartment arranged to be operated by the flow of fuel in the fuel supply means, magnet means in said fluid compartment, an electric circuit, solid state magnetic pickup means in said circuit actuated by said magnet means, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, means operative with said movable means providing influence of said magnet means on said pickup means, sensing means arranged to sense the engine functions, and means responsive to the measurement of the meter and said sensing means and arranged to provide an output comprising the amount of fuel used per unit of distance.
Claim 55
Dependent Claim
228 words
A flow metering system arranged for use with a combustion means having fuel supply means and in which a portion of the fuel fed thereto is unburned and including a return line from the combustion means arranged to return fuel back to the fuel supply means, said system comprising first and second flow meters one of which has means for connection in the fuel supply means of the combustion means and arranged to measure fuel supplied to the combustion means and the other of which has means for connection in the return line of the combustion means, at least one of said first and second meters comprising a housing having a fluid compartment, movable means in said fluid compartment arranged to be operated by the flow of fuel, magnet means in said fluid compartment, an electric circuit, solid state magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, the other of said first and second meters having a pickup output, means responsive to the pickup outputs of both meters arranged to provide a resultant which comprises the differential of said two pickup outputs, and indicating means responsive to said resultant arranged to indicate the differential of fuel flowing through said meters.
Claim 56
Dependent Claim
228 words
A flow metering system arranged for use with a combustion means having fuel supply means and in which a portion of the fuel fed thereto is unburned and including a return line from the combustion means arranged to return fuel back to the fuel supply means, said system comprising first and second flow meters one of which has means for connection in the fuel supply means of the combustion means and arranged to measure fuel supplied to the combustion means and the other of which has means for connection in the return line of the combustion means, at least one of said first and second meters comprising a housing having a fluid compartment, movable means in said fluid compartment arranged to be operated by the flow of fuel, magnet means in said fluid compartment, an electric circuit, solid state magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, the other of said first and second meters having a pickup output, means responsive to the pickup outputs of both meters arranged to provide a resultant which comprises the differential of said two pickup outputs, and indicating means responsive to said resultant arranged to indicate the differential of fuel flowing through said meters.
Claim 57
Dependent Claim
226 words
A flow metering system arranged for use with a combustion means having fuel supply means and in which a portion of the fuel fed thereto is unburned and including a return line from the combustion means arranged to return fuel back to the fuel supply means, said system comprising first and second flow meters one of which has means for connection in the fuel supply means of the combustion means and arranged to measure fuel supplied to the combustion means and the other of which has means for connection in the return line of the combustion means, at least one of said first and second meters comprising a housing having a fluid compartment, a piston in said fluid compartment driven reciprocally by the flow of fuel, a fluid reversing snap action type valve operated by said piston, drive means operated by said piston, magnet means in said fluid compartment operated by said drive means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, the other of said first and second meters having a pickup output, means responsive to the pickup outputs of both meters arranged to provide a resultant which comprises the differential of said two pickup outputs, and indicating means responsive to said resultant arranged to indicate the differential of fuel flowing through said meters.
Claim 58
Dependent Claim
226 words
A flow metering system arranged for use with a combustion means having fuel supply means and in which a portion of the fuel fed thereto is unburned and including a return line from the combustion means arranged to return fuel back to the fuel supply means, said system comprising first and second flow meters one of which has means for connection in the fuel supply means of the combustion means and arranged to measure fuel supplied to the combustion means and the other of which has means for connection in the return line of the combustion means, at least one of said first and second meters comprising a housing having a fluid compartment, a piston in said fluid compartment driven reciprocally by the flow of fuel, a fluid reversing snap action type valve operated by said piston, drive means operated by said piston, magnet means in said fluid compartment operated by said drive means, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, the other of said first and second meters having a pickup output, means responsive to the pickup outputs of both meters arranged to provide a resultant which comprises the differential of said two pickup outputs, and indicating means responsive to said resultant arranged to indicate the differential of fuel flowing through said meters.
Claim 59
Dependent Claim
139 words
A flow metering system arranged for use with at least two engines having fuel supply means, individual flow meters arranged for use with respective engine, each of said meters comprising a housing having a fluid compartment, movable means in said fluid compartment arranged to be operated by the flow of fuel in the fuel supply means of its respective engine, magnet means in said fluid compartments, an electric circuit, immovable magnetic pickup means in said circuit associated with each meter and being actuated by said magnet means, said pickup means having an output and being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and selective indicating means for each of said meters responsive to the outputs of said respective pickup means to indicate fuel flowing through each of said meters.
Claim 60
Dependent Claim
139 words
A flow metering system arranged for use with at least two engines having fuel supply means, individual flow meters arranged for use with respective engine, each of said meters comprising a housing having a fluid compartment, movable means in said fluid compartment arranged to be operated by the flow of fuel in the fuel supply means of its respective engine, magnet means in said fluid compartments, an electric circuit, immovable magnetic pickup means in said circuit associated with each meter and being actuated by said magnet means, said pickup means having an output and being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, and selective indicating means for each of said meters responsive to the outputs of said respective pickup means to indicate fuel flowing through each of said meters.
Claim 61
Dependent Claim
270 words
A flow metering system arranged for use with a combustion means having fuel supply means and in which a portion of the fuel fed thereto is unburned and including a return line from the combustion means arranged to return fuel back to the fuel supply means, said system comprising first and second flow meters one of which has means for connection in the fuel supply means of the combustion means and arranged to measure fuel supplied to the combustion means and the other of which has means for connection in the return line of the combustion means, at least one of said first and second meters comprising a housing having a fluid compartment, movable measuring means in said fluid compartment arranged to be operated by the flow of fuel, magnet means in said fluid compartment, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, the other of said first and second meters having a pickup output, sensing means sensing the temperature of the fuel, compensating means responsive to said sensing means and arranged to correct the output of said pickup means due to variations in temperature of the fuel, means responsive to the outputs of both pickup means at least one of which is compensated and arranged to provide a resultant which comprises the differential of said two pickup outputs, and indicating means responsive to said resultant arranged to indicate the compensated differential of fuel flowing through said meters.
Claim 62
Dependent Claim
270 words
A flow metering system arranged for use with a combustion means having fuel supply means and in which a portion of the fuel fed thereto is unburned and including a return line from the combustion means arranged to return fuel back to the fuel supply means, said system comprising first and second flow meters one of which has means for connection in the fuel supply means of the combustion means and arranged to measure fuel supplied to the combustion means and the other of which has means for connection in the return line of the combustion means, at least one of said first and second meters comprising a housing having a fluid compartment, movable measuring means in said fluid compartment arranged to be operated by the flow of fuel, magnet means in said fluid compartment, an electric circuit, immovable magnetic pickup means in said circuit actuated by said magnet means and having an output, said pickup means being disposed remote from said fluid compartment but within the influence of said magnet means for actuation thereby, the other of said first and second meters having a pickup output, sensing means sensing the temperature of the fuel, compensating means responsive to said sensing means and arranged to correct the output of said pickup means due to variations in temperature of the fuel, means responsive to the outputs of both pickup means at least one of which is compensated and arranged to provide a resultant which comprises the differential of said two pickup outputs, and indicating means responsive to said resultant arranged to indicate the compensated differential of fuel flowing through said meters.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |