Patent EP0106096A1 successfully refreshed from Google Patents.
US3719079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air momentum anemometer
Assignee: Individual
•
Filing: 1971-04-05
•
Granted: 1973-03-06
•
Expires: 1991-04-05
Abstract
Abstract A device for the measurement of horizontal wind velocity, especially low wind velocity. The horizontal component of momentum of the airstream is displaced from its normal flow. This is accomplished by either injecting an air jet into the airstream to displace the horizontal component of momentum, or withdrawing from the airstream the horizontal component of momentum by passing the airstream over an inlet into which inlet is drawn the horizontal component of the momentum flux of the airstream. The momentum of the air is converted to a force which is thus sensed and measured by a transducer, and since the force transduced is proportional to the first power of wind speed, large forces which may be accurately measured at low wind speeds are achieved.
Inventors
- 👤 W Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:51
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/02; G01P13/00; G01P13/02; G01P5/005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
109 words
A device for measuring wind velocity which comprises: means to displace a portion of an airstream from its flow path in a direction substantially normal to said flow path; means to sense the momentum flux of the displaced portion of the airstream spaced apart from the means to displace the portion from the airstream in a direction substantially normal to the original flow path and to convert the momentum flux of the displaced portion of the airstream into a force directly proportional to that displaced momentum flux; means responsive to the means to sense and convert to produce a signal representing said force; and means to measure the signal.
Claim 2
Independent Claim
109 words
A device for measuring wind velocity which comprises: means to displace a portion of an airstream from its flow path in a direction substantially normal to said flow path; means to sense the momentum flux of the displaced portion of the airstream spaced apart from the means to displace the portion from the airstream in a direction substantially normal to the original flow path and to convert the momentum flux of the displaced portion of the airstream into a force directly proportional to that displaced momentum flux; means responsive to the means to sense and convert to produce a signal representing said force; and means to measure the signal.
Claim 3
Independent Claim
109 words
A device for measuring wind velocity which comprises: means to displace a portion of an airstream from its flow path in a direction substantially normal to said flow path; means to sense the momentum flux of the displaced portion of the airstream spaced apart from the means to displace the portion from the airstream in a direction substantially normal to the original flow path and to convert the momentum flux of the displaced portion of the airstream into a force directly proportional to that displaced momentum flux; means responsive to the means to sense and convert to produce a signal representing said force; and means to measure the signal.
Claim 4
Independent Claim
109 words
A device for measuring wind velocity which comprises: means to displace a portion of an airstream from its flow path in a direction substantially normal to said flow path; means to sense the momentum flux of the displaced portion of the airstream spaced apart from the means to displace the portion from the airstream in a direction substantially normal to the original flow path and to convert the momentum flux of the displaced portion of the airstream into a force directly proportional to that displaced momentum flux; means responsive to the means to sense and convert to produce a signal representing said force; and means to measure the signal.
Claim 5
Dependent Claim
24 words
The device of claim 1 wherein the means to displace a portion of the airstream includes means to withdraw said portion from the airstream.
Claim 6
Dependent Claim
37 words
The device of claim 1 wherein the sensing and converting means is a honeycomb-like device and the means to produce a signal responsive to the force exerted on the walls of the honeycomb includes a strain gauge.
Claim 7
Dependent Claim
23 words
The device of claim 1 wherein the means to displace a portion of the airstream includes a jet stream injected into said airstream.
Claim 8
Dependent Claim
23 words
The device of claim 4 which includes means to direct said jet stream in a direction normal to the flow of said airstream.
Claim 9
Dependent Claim
27 words
The device of claim 4 which includes means to inject said jet stream in a direction normal to the means to sense and convert said momentum flux.
Claim 10
Dependent Claim
32 words
The device of claim 4 which includes means to introduce the jet stream in a direction normal to the flow of the airstream to the means and sense and convert momentum flux.
Claim 11
Independent Claim
158 words
A device for measuring wind velocity which comprises: means to withdraw a portion of an airstream from its flow path in a direction substantially normal to said flow path; a honeycomb-like device axially aligned with and spaced apart from and intermediate the airstream and the means to withdraw a portion of the airstream from its flow path in a direction substantially normal to the original flow path, the walls of the honeycomb defining cavities therein, to sense and convert the momentum flux of the displaced portion of the air stream such that substantially only the momentum flux of the displaced portion of the airstream in its direction of flow is sensed and converted into a force directly proportional to that displaced momentum flux; means responsive to the honeycomb-like device to measure the force exerted on the walls of the honeycomb secured to said honeycomb to produce an electrical signal representing said force; and means to measure the signal.
Claim 12
Independent Claim
158 words
A device for measuring wind velocity which comprises: means to withdraw a portion of an airstream from its flow path in a direction substantially normal to said flow path; a honeycomb-like device axially aligned with and spaced apart from and intermediate the airstream and the means to withdraw a portion of the airstream from its flow path in a direction substantially normal to the original flow path, the walls of the honeycomb defining cavities therein, to sense and convert the momentum flux of the displaced portion of the air stream such that substantially only the momentum flux of the displaced portion of the airstream in its direction of flow is sensed and converted into a force directly proportional to that displaced momentum flux; means responsive to the honeycomb-like device to measure the force exerted on the walls of the honeycomb secured to said honeycomb to produce an electrical signal representing said force; and means to measure the signal.
Claim 13
Independent Claim
101 words
A method for measuring the velocity of An airstream which includes; displacing at least a portion of an airstream in a direction substantially normal to the flow path of said air stream; sensing the momentum flux of the displaced portion of the airstream at a location spaced apart from the airstream displacing location in a direction substantially normal to the original flow path of the airstream and converting the momentum flux of the displaced portion of the airstream into a force directly proportional to that displaced momentum flux; producing a signal corresponding to the force; and measuring the signal so produced.
Claim 14
Independent Claim
101 words
A method for measuring the velocity of An airstream which includes; displacing at least a portion of an airstream in a direction substantially normal to the flow path of said air stream; sensing the momentum flux of the displaced portion of the airstream at a location spaced apart from the airstream displacing location in a direction substantially normal to the original flow path of the airstream and converting the momentum flux of the displaced portion of the airstream into a force directly proportional to that displaced momentum flux; producing a signal corresponding to the force; and measuring the signal so produced.
Claim 15
Dependent Claim
37 words
The method of claim 9 wherein the displacing of the airstream comprises injecting an air jet into the stream in a direction substantially normal to the flow of the airstream to displace a portion of the airstream.
Claim 16
Dependent Claim
95 words
The method of claim 9 wherein the displacing of the airstream comprises injecting normally into the airstream an air jet; entraining in the wakestream of the air jet the horizontal component of momentum flux of the portion of the airstream whereby at a distance from its source the wakestream contains both the vertical momentum flux of the air jet delivered to it at the air jet source and the horizontal momentum flux of the entrained environmental air; and measuring the force moment generated by deflection of the core of the wakestream from its null position.
Claim 17
Dependent Claim
52 words
The method of claim 9 wherein the displacing of the airstream comprises withdrawing the portion of the airstream from the airstream; exerting a deflecting force on a previously positioned transducer with the horizontal component of momentum flux of said withdrawn portion; and measuring the amount of deflecting force exerted on said transducer.
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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |