US3724279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assembly for measuring the magnitude of unbalance in an object
Assignee: BAE Systems Space & Mission Systems Inc
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Filing: 1971-09-13
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Granted: 1973-04-03
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Expires: 1991-09-13
Abstract
Abstract An assembly for measuring the magnitude of unbalance in an object is disclosed herein and, utilizing a conventional spinning device for spinning the object, provides a direct current output signal which is free of noise or other such distortion and which is proportional in magnitude to a given component of unbalance in the object. This is accomplished by exciting a strain-sensitive bridge circuit responsive to the degree of unbalance in the test object with an oscillatory signal synchronous with the spin rate of the object so as to produce a composite signal, which signal is coupled to a damped galvanometer which by averaging the composite signal over a period of time eliminates noise and other distortion components and thereby produces the desired direct current signal.
Inventors
- 👤 R Woolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
G; G01; G01M; G01M1/00; G01M1/14; G01M1/16; G01M1/22
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
124 words
A device for producing and determining the magnitude of a signal component proportional to a component of unbalance in an object, said device comprising: means for producing an excitation signal synchronous with rotation of the object; circuit means including a plurality of strain responsive elements connected together in a bridge arrangement and responsive to said excitation signal and to strain forces caused by the unbalance of said object for producing an output signal having at least said signal component proportional to said component of unbalance; and means connected with said circuit means and responsive to said output signal for producing an indication signal representative of substantially only the signal component proportional to said component of unbalance whereby said component of unbalance can be determined.
Claim 2
Independent Claim
124 words
A device for producing and determining the magnitude of a signal component proportional to a component of unbalance in an object, said device comprising: means for producing an excitation signal synchronous with rotation of the object; circuit means including a plurality of strain responsive elements connected together in a bridge arrangement and responsive to said excitation signal and to strain forces caused by the unbalance of said object for producing an output signal having at least said signal component proportional to said component of unbalance; and means connected with said circuit means and responsive to said output signal for producing an indication signal representative of substantially only the signal component proportional to said component of unbalance whereby said component of unbalance can be determined.
Claim 3
Independent Claim
79 words
A device for determining the magnitude of a component of unbalance in an object, said device comprising: means for producing an excitation signal synchronous with rotation of the object; circuit means including a plurality of strain responsive elements connected together in a bridge arrangement and responsive to said signal and to strain caused by the unbalance of said object for producing an output signal having at least a signal component proportional to the magnitude of said component of unbalance.
Claim 4
Independent Claim
79 words
A device for determining the magnitude of a component of unbalance in an object, said device comprising: means for producing an excitation signal synchronous with rotation of the object; circuit means including a plurality of strain responsive elements connected together in a bridge arrangement and responsive to said signal and to strain caused by the unbalance of said object for producing an output signal having at least a signal component proportional to the magnitude of said component of unbalance.
Claim 5
Dependent Claim
34 words
A device according to claim 2 including means connected with said circuit means and responsive to said output signal for producing an indication signal that indicates the peak magnitude of said component of unbalance.
Claim 6
Independent Claim
112 words
A device for determining the relative magnitude of a component of unbalance in an object, said device comprising: means for producing an excitation signal synchronous with rotation of the object; circuit meAns including a plurality of strain responsive elements connected together in a bridge arrangement, said elements being responsive to said excitation signal and responsive to strain which is caused by the unbalance in said object and which causes proportional unbalance in said bridge for producing an output signal which is the product of said excitation signal and degree of unbalance of said bridge, said output signal including a signal component proportional in amplitude to the magnitude of said component of unbalance.
Claim 7
Independent Claim
112 words
A device for determining the relative magnitude of a component of unbalance in an object, said device comprising: means for producing an excitation signal synchronous with rotation of the object; circuit meAns including a plurality of strain responsive elements connected together in a bridge arrangement, said elements being responsive to said excitation signal and responsive to strain which is caused by the unbalance in said object and which causes proportional unbalance in said bridge for producing an output signal which is the product of said excitation signal and degree of unbalance of said bridge, said output signal including a signal component proportional in amplitude to the magnitude of said component of unbalance.
Claim 8
Dependent Claim
38 words
A device according to claim 4 including indication means connected to the output of said circuit means and responsive to said output signal for producing a direct current signal proportional to the magnitude of said component of unbalance.
Claim 9
Dependent Claim
37 words
A device according to claim 5 wherein said indication means includes means for averaging said output signal over a period of time whereby each signal component included therewith, except said direct current signal component, averages to zero.
Claim 10
Dependent Claim
139 words
A measuring device for determining a component of unbalance in a moving object which generates a cyclic pattern of forces proportional to the magnitude of the component of unbalance, said measuring device comprising: means responsive to strain cuased by the cyclic pattern of forces for producing an output signal having at least a direct current signal component proportional to the magnitude of said component of unbalance, said means including a bridge circuit having a plurality of strain responsive elements responsive to said strain and signal providing means providing an excitation signal synchronous with said cyclic pattern for exciting said bridge circuit; and, indication means connected with said last-mentioned means and responsive to said output signal for eliminating substantially all signal components except a direct current signal substantially proportional in magnitude to the said component of unbalance in an object.
Claim 11
Dependent Claim
139 words
A measuring device for determining a component of unbalance in a moving object which generates a cyclic pattern of forces proportional to the magnitude of the component of unbalance, said measuring device comprising: means responsive to strain cuased by the cyclic pattern of forces for producing an output signal having at least a direct current signal component proportional to the magnitude of said component of unbalance, said means including a bridge circuit having a plurality of strain responsive elements responsive to said strain and signal providing means providing an excitation signal synchronous with said cyclic pattern for exciting said bridge circuit; and, indication means connected with said last-mentioned means and responsive to said output signal for eliminating substantially all signal components except a direct current signal substantially proportional in magnitude to the said component of unbalance in an object.
Claim 12
Dependent Claim
26 words
A measuring device according to claim 7 wherein said signal providing means includes an alternator connected with said moving object for producing said synchronous excitation signal.
Claim 13
Dependent Claim
41 words
A measuring device according to claim 7 wherein said signal providing means includes a plurality of reversing switches adapted to be connected to a direct current source and responsive to the movement of said object for providing said synchronous excitation signal.
Claim 14
Dependent Claim
168 words
An assembly for measuring the magnitude of a component of unbalance in an object, said assembly comprising: means for supporting said object; means imparting motion to said object for generating a cyclic pattern of forces proportional to the magnitude of unbalance; means responsive to the cyclic pattern of forces for producing an output signal having at least a direct current signal component proportional to the magnitude of said component of unbalance in said object said output signal producing means including a bridge circuit having a plurality of strain responsive elements responsive to strain caused by said cyclic pattern of forces for determining the state of balance of said bridge circuit and signal providing means providing an excitation signal synchronous with said cyclic pattern for exciting said bridge circuit; and indication means connected with said last-mentioned means and responsive to said output signal for eliminating substantially all signal components except said direct current signal whereby said indication means indicates the magnitude of said component of unbalance in said object.
Claim 15
Dependent Claim
168 words
An assembly for measuring the magnitude of a component of unbalance in an object, said assembly comprising: means for supporting said object; means imparting motion to said object for generating a cyclic pattern of forces proportional to the magnitude of unbalance; means responsive to the cyclic pattern of forces for producing an output signal having at least a direct current signal component proportional to the magnitude of said component of unbalance in said object said output signal producing means including a bridge circuit having a plurality of strain responsive elements responsive to strain caused by said cyclic pattern of forces for determining the state of balance of said bridge circuit and signal providing means providing an excitation signal synchronous with said cyclic pattern for exciting said bridge circuit; and indication means connected with said last-mentioned means and responsive to said output signal for eliminating substantially all signal components except said direct current signal whereby said indication means indicates the magnitude of said component of unbalance in said object.
Claim 16
Dependent Claim
36 words
An assembly according to claim 10 wherein said motion imparting means includes a motor and wherein said signal providing means includes an alternator connected with and driven by said motor for providing said synchronous excitation signal.
Claim 17
Dependent Claim
39 words
An assembly according to claim 10 wherein said signal providing means includes a plurality of reversing switches adapted for connection with a direct current source and responsive to the motion of said object for providing said synchrOnous excitation signal.
Claim 18
Dependent Claim
224 words
An assembly for measuring the magnitude of dynamic unbalance in an object, said assembly comprising: a support member; a motor positioned adjacent said support member; linking means connected with said support member and said motor for substantially rigidly supporting said motor relative to said support member; a turntable adapted to support said object; a spindle connected to said turntable and driven by said motor for rotating said object about a given axis whereby unbalance in said object about said axis generates a proportional cyclic pattern of forces in said linking means; means responsive to the strain in said linking means caused by said forces for producing an output signal having at least a direct current component proportional to the magnitude of a component of unbalance in said object, said last-mentioned means including a bridge circuit having a plurality of strain responsive elements mounted to said linking means and responsive to the strain in said linking means caused by said forces for determining the state of balance of said bridge circuit and signal providing means connected with said bridge circuit and providing an excitation signal synchronous with said cyclic pattern for exciting said bridge circuit; and a damped galvanometer connected with said bridge circuit and responsive to said output signal for providing an indication signal substantially proportional in amplitude to said direct current signal component.
Claim 19
Dependent Claim
224 words
An assembly for measuring the magnitude of dynamic unbalance in an object, said assembly comprising: a support member; a motor positioned adjacent said support member; linking means connected with said support member and said motor for substantially rigidly supporting said motor relative to said support member; a turntable adapted to support said object; a spindle connected to said turntable and driven by said motor for rotating said object about a given axis whereby unbalance in said object about said axis generates a proportional cyclic pattern of forces in said linking means; means responsive to the strain in said linking means caused by said forces for producing an output signal having at least a direct current component proportional to the magnitude of a component of unbalance in said object, said last-mentioned means including a bridge circuit having a plurality of strain responsive elements mounted to said linking means and responsive to the strain in said linking means caused by said forces for determining the state of balance of said bridge circuit and signal providing means connected with said bridge circuit and providing an excitation signal synchronous with said cyclic pattern for exciting said bridge circuit; and a damped galvanometer connected with said bridge circuit and responsive to said output signal for providing an indication signal substantially proportional in amplitude to said direct current signal component.
Claim 20
Independent Claim
170 words
A device for measuring the magnitude of cyclic pattern of forces in an object, said device comprising: a bridge circuit including force responsive means connected with said object whereby at any instant the state of balance of said bridge circuit is proportional to the magnitude of the cyclic pattern of forces in said object at that instant; means connected with said bridge circuit and producing an oscillatory signal having a frequency equal to said cyclic pattern, said signal being provided for exciting said bridge circuit whereby said bridge circuit produces an output signal which is the product of said oscillatory signal and the state of balance of said bridge; and means connected with said bridge circuit for averaging the output signal over a period of time whereby all of the components making up said output signal except the direct current component average to zero, said direct current component being proportional to that component of the cyclic pattern of forces that has the same frequency and phase as said oscillatory signal.
Claim 21
Independent Claim
170 words
A device for measuring the magnitude of cyclic pattern of forces in an object, said device comprising: a bridge circuit including force responsive means connected with said object whereby at any instant the state of balance of said bridge circuit is proportional to the magnitude of the cyclic pattern of forces in said object at that instant; means connected with said bridge circuit and producing an oscillatory signal having a frequency equal to said cyclic pattern, said signal being provided for exciting said bridge circuit whereby said bridge circuit produces an output signal which is the product of said oscillatory signal and the state of balance of said bridge; and means connected with said bridge circuit for averaging the output signal over a period of time whereby all of the components making up said output signal except the direct current component average to zero, said direct current component being proportional to that component of the cyclic pattern of forces that has the same frequency and phase as said oscillatory signal.
References Cited (Backward Citations)
US3336809A
Cited
US3307408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |