INTERNET OF THINGS (IoT) ENABLED WIRELESS SENSOR SYSTEM ENABLING PROCESS CONTROL, PREDICTIVE MAINTENANCE OF ELECTRICAL DISTRIBUTION NETWORKS, LIQUID AND GAS PIPELINES AND MONITORING OF AIR POLLUTANTS INCLUDING NUCLEAR, CHEMICAL, AND BIOLOGICAL AGENTS USING ATTACHED AND/OR EMBEDDED PASSIVE ELECTROMAGNETIC SENSORS
20210174973 · 2021-06-10
Inventors
Cpc classification
H04W84/18
ELECTRICITY
G01R31/50
PHYSICS
H04Q9/00
ELECTRICITY
G01R15/144
PHYSICS
G16Y40/35
PHYSICS
H04L67/12
ELECTRICITY
G01R31/327
PHYSICS
H10N39/00
ELECTRICITY
G01R15/146
PHYSICS
International classification
G16Y40/35
PHYSICS
Abstract
The invention relates generally to an Internet of Things (IoT) enabled wireless sensor system using attached and/or embedded passive electromagnetic sensors (PES) with distribution hardware. One embodiment of this invention includes a wireless sensor system, which permits process control and predictive maintenance on a utility's electrical transmission and distribution grid. Another embodiment includes a wireless sensor system, which permits process control and predictive maintenance of liquid or gas through a pipeline. Another embodiment includes a wireless sensor system, which permits measurement of breathable air pollutants. Furthermore, a method of manufacturing a protective passive electromagnetic sensor pod and passive electromagnetic sensor equipped distribution hardware components is provided.
Claims
1. A wireless sensor system comprising: a. at least one Passive Electromagnetic Sensor; b. at least one Electromagnetic Controller Communicator; c. at least one user distributed computing resource; d. at least one supercomputer with artificial intelligence means; and e. at least one user computer.
2. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor is attached to a component of distribution hardware.
3. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor is embedded in a component of distribution hardware.
4. The wireless sensor system of claim 2 where said component of distribution hardware is comprised of an electrical grid delivery component selected from the following: ACSR conductor wire, fuses, transformers, switches, relays, circuit breakers, bus bars, capacitors, clamps, towers and poles, insulators, connectors, couplings, surge arrestors, stirrups, taps, regulation banks, suppressors, and street light covers.
5. The wireless sensor system of claim 2 where said component of distribution hardware is comprised of a component of municipality lighting hardware selected from the following: light covers, poles, and building architectural components such as walls, doors, and windows.
6. The wireless sensor system of claim 2 where said component of distribution hardware is comprised of a component of pipeline hardware components selected from the following: pipe, valves, and storage containers.
7. The wireless sensor system of claim 3 where said component of distribution hardware is comprised of an electrical grid delivery component selected from the following: ASWR conductor wire, fuses, transformers, switches, relays, circuit breakers, bus bars, capacitors, clamps, towers and poles, insulators, connectors, couplings, surge arrestors, stirrups, taps, regulation banks, suppressors, and street light covers.
8. The wireless sensor system of claim 3 where said component of distribution hardware is comprised of a component of municipality lighting hardware selected from the following: light covers, poles, and building architectural components such as walls, doors, and windows.
9. The wireless sensor system of claim 3 where said component of distribution hardware is comprised of a component of pipeline hardware components selected from the following: pipe, valves, and storage containers.
10. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor is further comprised of a passive acoustic wave sensor.
11. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor is further comprised of a passive microprocessor.
12. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor is rigid.
13. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor is flexible.
14. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor is enclosed in a specialty glass pod.
15. The wireless sensor system of claim 14 where said specialty glass pod is curved.
16. The wireless sensor system of claim 14 where said specialty glass pod is comprised of alkali-aluminosilicate glass.
17. The wireless sensor system of claim 14 where said specialty glass pod is coated on the inside with non-conducting material.
18. The wireless sensor system of claim 17 where said non-conducting material is silicone.
19. The wireless sensor system of claim 10 where said passive acoustic wave sensor is comprised of: a. a flexible piezoelectric polymer substrate; b. at least one interdigital transducer; and c. a delay gap test comprised of films, barriers, gates, and gratings.
20. The wireless sensor system of claim 11 where said passive microprocessor is comprised of: a. an antenna; b. a demodulator; c. at least one electromagnetic power harvester; d. a voltage controller; e. a central processing unit; and f. a modulator.
21. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor measures phenomena selected from the following: electrical voltage, current, temperature, pressure, humidity, oscillation, deflection, molecule flow rates, rainfall, air pollutants, chemical agents, biological agents, nuclear agents, chemical concentration, chemical composition, or particulate matter.
22. The wireless sensor system of claim 1 where said Electromagnetic Controller Communicator is comprised of: a. an electromagnetic Radio-Frequency (RF) antenna; b. an encoder; c. a Radio-Frequency (RF) transceiver; d. a Radio-Frequency (RF) receiver; e. a decoder; f. a CPU; g. a data storage device; h. a battery i. a global positioning system device; j. a cellular communications device; and k. algorithm and programming logic means.
23. The wireless sensor system of claim 1 where said user distributed computing resource is comprised of means of inputting maintenance records of equipment faults, reduction of capacity, and other anomalous conditions, receiving sensor information, alarms, machine to machine orders, utility grid wellness maps, and processing inquiries.
24. The wireless sensor system of claim 1 where said artificial intelligence means is comprised of means of exhibiting intelligent behavior, such as learning, demonstrating, explaining, creating correlations and advising its users, creating correlations between sensor data and equipment faults, reduction of capacity, local and inter-area oscillations, and other anomalous conditions and using these newly found correlations to create algorithms of anomalous conditions and sending these algorithms to ECC's.
25. The wireless sensor system of claim 1 where said Passive Electromagnetic Sensor is further comprised of a unique identification, frequency, and host hardware category identification.
26. A method of enabling process control and predictive maintenance comprising the following steps: a. Installing at least one Passive Electromagnetic Sensor as a component of distribution hardware; b. Installing at least one Electromagnetic Controller Communicator in a location physically separated from said Passive Electromagnetic Sensor; c. Activating said Passive Electromagnetic Sensor by receipt of Radio-Frequency pulses from said Electromagnetic Controller Communicator; d. whereby said Passive Electromagnetic Sensor harvests electromagnetic impulses and converts said electromagnetic impulses into an Acoustic Wave; e. Modifying said Acoustic Wave to create a modified wave form based on a phenomena to be measured; f. Transmitting said modified wave form from said Passive Electromagnetic Sensor to said Electromagnetic Controller Communicator, whereby said Electronic Controller Communicator computes said modified wave form into a phenomena measurement value, which generates phenomena measurement information, alarms, orders, and mapping information data; g. Communicating said data by said Electronic Controller Communicator's cellular communication means to a super computer, whereby said supercomputer assembles said data into a comprehensive process control and predictive model. h. Transmitting said process control and said predictive model to at least one user computer.
27. The method of claim 26 where said Passive Electromagnetic Sensor is installed by embedding within said component of distribution hardware.
28. The method of claim 26 where said Passive Electromagnetic Sensor is installed by attaching to said component of distribution hardware.
29. The method of claim 26 where said distribution hardware is comprised of electrical grid delivery components selected from the following: ASWR conductor wire, fuses, transformers, switches, relays, circuit breakers, bus bars, capacitors, clamps, towers and poles, insulators, connectors, couplings, surge arrestors, stirrups, taps, regulation banks, suppressors, and street light covers.
30. The method of claim 26 where said distribution hardware is comprised of municipality lighting hardware selected from the following: light covers, poles, and building architectural components such as walls, doors, and windows.
31. The method of claim 26 where said distribution hardware is comprised of pipeline hardware components selected from the following: pipe, valves, and storage containers.
32. The method of claim 26 where said Passive Electromagnetic Sensor is comprised of a passive acoustic wave sensor and a passive central processing unit.
33. The method of claim 26 where said Electromagnetic Controller Communicator generates and emits one or more electromagnetic waves.
34. The method of claim 33 where said passive acoustic wave sensor harvests said electromagnetic waves by passing electromagnetic energy through said passive acoustic wave sensor's interdigital transducers, whereby an electromagnetic pulse is converted into an Acoustic Wave.
35. The method of claim 34 whereby said Acoustic Wave travels over said acoustic wave sensor's delay gap, whereby said delay gap is designed based on the phenomena being measured.
36. The method of claim 35 whereby said Acoustic Wave is converted to an electromagnetic wave by said Acoustic Wave passing through said acoustic wave sensor's outbound interdigital transducer.
37. The method of claim 36 where said passive central processing unit processes modified characteristics of said electromagnetic wave and computes a value for the phenomena being measured.
38. The method of claim 37 where said Passive Electromagnetic Sensor transmits said value to said Electromagnetic Controller Communicator.
39. The method of claim 36 where said electromagnetic wave is broadcast to said Electromagnetic Controller Communicator using backscatter communication.
40. A method of manufacturing a protective Passive Electromagnetic Sensor pod comprising the steps of: a. Forming a glass pod comprised of a top sheet and a bottom sheet; b. Coating the inside surface of said top sheet and said bottom sheet with a non-conducting material; c. Depositing a Passive Electromagnetic Sensor onto the inside surface said bottom sheet; d. Covering said Passive Electromagnetic Sensor with said top sheet, which forms a glass pod encasing said Passive Electromagnetic Sensor; e. Heating said glass pod; f. Pressing said glass pod in its heated state to seal said top sheet and said bottom sheet; g. Removing air from said glass pod through a vent hole in said glass pod; h. Replacing said air with argon gas; and i. Sealing said vent hole.
41. The method of claim 40 where said top sheet and said bottom sheet are curved.
42. The method of claim 41 where said top sheet and said bottom sheets are curved to accommodate the shape of a component of distribution hardware.
43. The method of claim 42 where said distribution hardware is comprised of electrical grid delivery components selected from the following: ASWR conductor wire, fuses, transformers, switches, relays, circuit breakers, bus bars, capacitors, clamps, towers and poles, insulators, connectors, couplings, surge arrestors, stirrups, taps, regulation banks, suppressors, and street light covers.
44. The method of claim 42 where said distribution hardware is comprised of municipality lighting hardware selected from the following: light covers, poles, and building architectural components such as walls, doors, and windows.
45. The method of claim 42 where said distribution hardware is comprised of pipeline hardware components selected from the following: pipe, valves, and storage containers.
46. The method of claim 40 where said non-conducting material is comprised of silicone.
47. The method of claim 46 where said silicone is applied by charging said top sheet and said bottom sheet to 30,000 volts.
48. The method of claim 40 further comprising the step of applying a layer of epoxy to said Passive Electromagnetic Sensor.
49. The method of claim 40 where said glass pod is further comprised of an opening over delay gap tests of said Passive Electromagnetic Sensor.
50. A method of manufacturing Passive Electromagnetic Sensor equipped distribution hardware components comprising: a. depositing silicone adhesive to the length of a Passive Electromagnetic Sensor pod; b. attaching said Passive Electromagnetic Sensor pod to a surface of a distribution hardware component during the manufacturing process of said distribution hardware component.
51. The method of claim 50 further comprising the step of placing said Passive Electromagnetic Sensor pod in a magazine.
52. The method of claim 50 where said Passive Electromagnetic Sensor pod is attached to said surface by a mechanical arm.
53. The method of claim 50 where said distribution hardware component is comprised of electrical grid delivery components selected from the following: ASWR conductor wire, fuses, transformers, switches, relays, circuit breakers, bus bars, capacitors, clamps, towers and poles, insulators, connectors, couplings, surge arrestors, stirrups, taps, regulation banks, suppressors, and street light covers.
54. The method of claim 50 where said distribution hardware component is comprised of municipality lighting hardware selected from the following: light covers, poles, and building architectural components such as walls, doors, and windows.
55. The method of claim 50 where said distribution hardware component is comprised of pipeline hardware components selected from the following: pipe, valves, and storage containers.
56. The method of claim 50 further comprising the steps of: a. placing said Passive Electromagnetic Sensor pod in a magazine; b. attaching said Passive Electromagnetic Sensor pod to the long axis of Aluminum Conductor Steel Reinforced (ACSR) wire as said ACSR wire is rolled onto a spool.
57. The method of claim 50 further comprising the steps of: a. placing said Passive Electromagnetic Sensor pod in a magazine; b. attaching said Passive Electromagnetic Sensor pod to the inside long axis of a cutout fuse tube.
58. The method of claim 50 further comprising the steps of: a. placing said Passive Electromagnetic Sensor pod in a magazine; b. attaching said Passive Electromagnetic Sensor pod to the inside long axis of the Wye bushing of a transformer.
59. The method of claim 50 further comprising the steps of: a. placing said Passive Electromagnetic Sensor pod in a magazine; b. attaching said Passive Electromagnetic Sensor pod to the inside long axis of the Delta bushing of a transformer.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
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DETAILED DESCRIPTION OF THE INVENTION
[0110] The present invention is directed to an Internet of Things (IoT) enabled wireless sensor system permitting process control and predictive maintenance on a utility's electrical transmission and distribution grid and/or an Internet of Things (IoT) enabled wireless sensor system permitting process control and predictive maintenance on a company's liquid and gas pipeline and/or an Internet of Things (IoT) enabled wireless sensor system permitting measurement of indoor and outdoor air pollutants using embedded or attached Passive Electromagnetic Sensors (PES).
[0111] In one embodiment, the wireless sensor system is made up of the following components: one or multiple passive electromagnetic sensor (PES)
[0112] The PES is a miniature passive computer sensor
[0113] The Electromagnetic Controller Communicator (ECC)
[0114] One or more user computers 63 are capable of processing inquiries, inputting maintenance records of equipment faults, inputting reduction of capacity, and other anomalous conditions. The user computer can also receive sensor information, alarms, system orders, and utility grid wellness maps.
[0115] One or more distributed computing resources 64 are capable of processing quantities of computations and sophisticated data analytics and calculations.
[0116] One or more supercomputers 65 are comprised of artificial intelligence (AI) means with upload feeds of data and information from each ECC. The AI is capable of exhibiting intelligent behavior, such as learning, demonstrating, explaining, creating correlations and advising its users. The AI is capable of creating correlations between sensor data and equipment faults, sensor data and reduction of capacity, sensor data and other anomalous conditions local and inter-area oscillations. The AI uses these newly found correlations to create algorithms of anomalous conditions and sends these algorithm updates to each ECC.
[0117] These components are connected as follows: A wireless sensor system comprised of hundreds or thousands of uniquely identifiable PES 32-35, communicating using electromagnetic waves 24 & 48, with an ECC 47. The system has hundreds of ECCs being placed at every mile of a utility's electrical transmission and distribution grid
[0118] It should further be noted that the system is installed when PES are embedded or attached as a component in the manufacture of utility transmission and distribution hardware including ACSR conductor wire
[0119] In order to make the PES capable of withstanding exposure to the elements for decades and make it capable of being installed as a component of distribution hardware where it will be crushed and abraded, it must be encased. One solution is to encase the passive electromagnetic sensor (PES) in a specialty glass pod 32-35. This solution is beneficial because the glass pod is inert to electrical energy, doesn't impede electromagnetic waves, can be made to reflect solar radiation, and dissipate heat. Glass does not conduct electricity, making it ideal for an electrical environment full of leaking voltage. The electromagnetic waves being generated by the ECC to power the PES are large enough to pass through the glass pod. The inside of the pod can be made opaque, eliminating solar radiations degradation of the PES. The inside of the pod can be made a vacuum filled with argon and so allow the PES to better dissipate heat. The glass pod can be curved to match the outside diameter of distribution hardware such as ACSR conductor wire, the curvature of a pipeline pump, valve or pipe. The PES pod can also be made so the delay gap tests in the AW part of the PES is open to the environment 27 & 30.
[0120] The PES pod 26-31 is manufactured on a glass sheet production line. Specialty glass, such as alkali-aluminosilicate glass, is used to increase the surface compression value of the glass and make it impervious to shock. These specialty glasses have completed an ion exchange process that creates an internal tension in the glass that imparts an ultra-high surface compression value. Such glass has a Vickers hardness test rating of 622 to 701. This hardness and surface compression value exceeding 10,000 lbs, per inch allows the encased PES to be installed as a manufactured component of distribution hardware using production machinery, where it may be crushed or abraded. This also allows the sensor a higher likelihood of not being destroyed as its host is installed in an electrical distribution grid, pipeline, municipal light grid, or on a building.
[0121] The inside of two separate curved sheets, top and bottom of the enclosure pod, are coated with synthetic silicone or some other non-conducting light-colored opaque material. The silicone coating is applied by charging the glass to 30,000 volts under specific heat conditions. A thin layer of silicone coats and fuses to the inside surface of the glass, making it white, and reduces the PES's exposure to solar radiation over decades of exposure. The synthetic silicone is non-conducting and does not interfere with the transmission of radio waves from the ambient environment to the vacuum sealed passive electromagnetic sensor or vice a versa.
[0122] On the glass sheet production line, an electromagnetic sensor is deposited on a wafer of curved specialty glass that has been coated with synthetic silicone to reduce exposure to solar radiation. The curve of the glass matches the outside diameter of a component of distribution hardware such as ACSR conductor wire
[0123] To manufacture PES equipped distribution hardware components, the completed PES pod 32 & 34 is placed in a magazine. As the outer layer of the ACSR conductor wire is spun around the steel core, a single component silicone adhesive is deposited ⅜″ thick for the length of the pod, plus 10% on each end. In a second station, a mechanical arm attaches the curved pod along the long axis of the ACRS as it is reeling out. The process is executed in a humid environment, allowing for quick cure of the silicone-based adhesive that links the pod to the outer layer of metal. The ACSR is rolled onto spools as it normally is. Due to the nature of the glass pod and the curve of the pod, the pod is not crushed or destroyed as the ACSR is wound under tension.
[0124] In another embodiment, the attachment of the PES pod to the cutout fuse tube 52 is the same as for ACSR above. The PES pod is placed in a magazine. After the cutout fuse tube is cut to size, a single component silicone adhesive is deposited ⅜″ thick for the length of the pod, plus 10% on each end. In a second station, a mechanical arm attaches the curved pod along the inside long axis of the cutout fuse tube. The process is executed in a humid environment, allowing for quick cure of the silicone-based adhesive that links the pod to the inside of the cutout tube. The cut-out tube continues in its manufacture process as normal. Due to the nature of the glass pod and the curve of the pod, the pod is not crushed or damaged when the cutout fuse wire is threaded through the fuse tube.
[0125] In yet another embodiment, the completed PES pod is placed in a magazine. As the complete transformer rolls down the production line, a single component silicone adhesive is deposited ⅜″ thick for the length of the pod, plus 10% on each of the Wye or Delta bushing. In a second station, a mechanical arm attaches the curved pod along the inside long axis of the Wye or Delta bushing of the transformer. Due to the nature of the glass pod and the curve of the pod, the pod is not crushed or damaged when the complete transformer is packaged, transported, and installed.
[0126] It should also be noted that the complete PES pod can be installed manually post distribution hardware installation into the electrical transmission and distribution grid, pipeline system, or municipal light grid.
[0127] In a preferred embodiment, a method of enabling process control and predictive maintenance associated with the disclosed device comprises the following steps: [0128] The wireless network system functions as the distribution hardware serving as host devices (ACSR conductor wire
[0129] The ECC are placed on power poles
[0130] The user computers(s) have four functions: (1) inputs maintenance records of equipment faults, reduction of capacity, and other anomalous conditions for use by the super computer to create correlations with PES measurement data, (2) receive sensor information, alarms, machine to machine orders, and utility grid wellness maps, and (3) process user enquiries about the utility grids wellness, alarms, current situation, etc. (4) serves as distributed processing capability for the network.
[0131] This wireless sensor system acts as a peer to peer network (P2P) where the programming logic onboard the PES causes the system to create a block in a blockchain transaction for each measured phenomena 67. A unique PES requests a transaction as a member of the wireless sensor system peer to peer network (P2P) 66. The network, consisting of multiple PES', ECCs, multiple user computers, distributed computing resources, and one or more supercomputers, verifies the requesting PES's identity and status using algorithms. Once verified, the PES can communicate phenomena information as blocks in a blockchain 68. The PES' microprocessor causes the PBS to communicate the blockchain transaction to the peer to peer network (P2P). This method allows for both local and distributed security and verification phenomena data as trustworthy.
[0132] Peer to peer network (P2P) 66 is also achieved by the programming logic stored on the data storage device 42 onboard the ECC
[0133] The wireless sensor system sends its information to a supercomputer housing artificial intelligence 65 means. The artificial intelligence uses this data and information to explain, demonstrate and advise users on the utility grid's real-time wellness. The artificial intelligence also receives maintenance records of equipment faults, reduction of capacity, and other anomalous conditions from user terminals. The artificial intelligence and distributed computing resources create correlations between anomalous sensor readings and incipient failures, failures, faults, interrupts of service. The AI uses these correlations to learn, improve and finally predict incipient failures, failures, faults, interrupts of service. This allows the IOU or coop to move from preventive to predictive maintenance. The AI also uses these correlations to create more accurate normal and anomalous phenomena patterns for type of host device (ACSR conductor wire
[0134] The wireless sensor system sends its information to one or more supercomputers housing an artificial intelligence (AI) 65 means. The artificial intelligence (AI) combines regional wellness and safety maps into an overall utility structural health monitor of the entire utility electrical grid
[0135] The wireless sensor system simultaneously measures voltage waveform (frequency) at tens, hundreds, and thousands of points on the utility transmission and distribution grid to determine local and inter-area oscillation of voltage waveforms. These simultaneous voltage phase frequency measurements are sent to one or more supercomputers housing an artificial intelligence (AI) 65 means. The artificial intelligence (AI) creates an overall utility grid monitoring system for the measurement of local and inter-area oscillation of voltage frequency which can cause cascading utility grid failures. The local and inter-area oscillation monitoring improves over time as the system grows larger and creates strategies for dampening oscillations through the injection of voltage using energy storage devices.
[0136] In another embodiment, the artificial intelligence (AI) combines sector indoor and outdoor breathable air wellness and safety maps into an overall municipality outdoor breathable air wellness and safety maps. This information allows an automated method for tracking and measuring the presence of pollutants in a municipality's breathable air. Breathable air wellness and safety maps improve over time as the system learns. The AI system creates correlations between weather, industrial activity, government activity, and other factors to move the municipality from reactive to predictive. Predictive knowledge allows the municipality to create policies that improve the indoor and outdoor breathable air quality, and measure the improvement using the device.
[0137] This wireless sensor system, acting as a peer to peer network (P2P), is also used by pipelines carrying oil and gas, water, ammonia, alcohol, hydrogen, steam, or any other gas or liquid. The wireless multi sensor network that comprises a plurality of electromagnetic passive sensors are embedded as a manufactured internal component of a mechanical device used in pipelines such as pipe
[0138] This wireless sensor system, acting as a peer to peer network (P2P), is also used as part of a computer ethernet or fiber optic network in the transmission of internet protocol data packets. The wireless multi sensor network that comprises a plurality of passive electromagnetic sensors, may be embedded as a manufactured internal component of a mechanical device used in computer networks such as cable, WiFi routers, switches, wired routers, network interface cards, computer motherboards, ports, busses, hubs, fittings, jacks, plugs and connections. In addition to the phenomena listed above, these sensors could be made to measure voltage, current, flow rate.
[0139] This wireless sensor system, acting as a peer to peer network (P2P), is also used by national security entities seeking to monitor nuclear, chemical and biological threats to a municipality's outdoor breathable air. The wireless multi sensor network that comprises a plurality of passive electromagnetic sensors are attached to or embedded as a manufactured internal component of a municipality's lighting grid or a utilities transmission and distribution grid. Detection of NBC pollutants may trigger alarms and orders associated with anomalous conditions.
[0140] As discussed, the invention has many different features, variations and multiple different embodiments. The invention has been described in this application at times in terms of specific embodiments for illustrative purposes and without the intent to limit or suggest that the invention conceived is only one particular embodiment. It is to be understood that the invention is not limited to any single specific embodiments or enumerated variations. Many modifications, variations and other embodiments of the invention will come to mind of those skilled in the art to which this invention pertains, and which are intended to be and are covered by both this disclosure. It is indeed intended that the scope of the invention should be determined by proper interpretation and construction of the disclosure, including equivalents, as understood by those of skill in the art relying upon the complete disclosure at the time of filing.