US3693400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for measuring the characteristics of mechanical-to-electrical transducers
Assignee: Western Atlas International Inc
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Filing: 1970-05-20
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Granted: 1972-09-26
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Expires: 1990-05-20
Abstract
Abstract A transducer to be tested is mounted on a shaking table which is energized by a desired driving test signal. The table''s motion is precisely measured with reference to an inertial system, for example, a freely falling body. The precise measurement of the shaking table''s movements is correlated with the electric output signal from the transducer, and the result of this correlation allows an accurate measurement of the characteristics of the transducer subjected to vibrations by the shaking table.
Inventors
- 👤 Carl H Savit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:55
CPC Classifications
G; G01; G01P; G01P21/00; G01V; G01V13/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
74 words
A method for testing a mechanical-to-electrical transducer comprising the steps of: mounting said transducer on a support platform; vibrating said platform in accordance with a desired test signal; releasing a free-falling body; precisely measuring the motion of said platform with reference to said free- falling body; and comparing the transducer''s output electrical signal, induced by the vibrations of said platform, with the precisely measured motion to obtain an accurate measurement of the transducer''s characteristics.
Claim 2
Independent Claim
74 words
A method for testing a mechanical-to-electrical transducer comprising the steps of: mounting said transducer on a support platform; vibrating said platform in accordance with a desired test signal; releasing a free-falling body; precisely measuring the motion of said platform with reference to said free- falling body; and comparing the transducer''s output electrical signal, induced by the vibrations of said platform, with the precisely measured motion to obtain an accurate measurement of the transducer''s characteristics.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said motion is measured with laser beams.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein said free falling body is maintained in an evacuated chamber.
Claim 5
Dependent Claim
15 words
The method of claim 2 wherein said free falling body is a laser beam generator.
Claim 6
Dependent Claim
13 words
The method of claim 1 wherein said support platform is a shaking table.
Claim 7
Dependent Claim
44 words
The method of claim 1 wherein, said motion is measured by simultaneously measuring a first distance and a second distance, said first distance being between a distance-measuring device and said platform, and said second distance being between said distance-measuring device and said falling body.
Claim 8
Dependent Claim
21 words
The method of claim 1 wherein said motion is measured by measuring the distance between the falling body and said platform.
Claim 9
Independent Claim
44 words
A method of measuring the motion of a transducer comprising the steps of: mounting said transducer on a support platform; moving said platform in accordance with a desired test signal; and precisely measuring the motion of said transducer with reference to a freely-falling body.
Claim 10
Independent Claim
44 words
A method of measuring the motion of a transducer comprising the steps of: mounting said transducer on a support platform; moving said platform in accordance with a desired test signal; and precisely measuring the motion of said transducer with reference to a freely-falling body.
Claim 11
Dependent Claim
26 words
The method of claim 8, wherein said transducer is a mechanical-to-electrical transducer, and measuring the transducer''s output electric signal induced by the motion of said platform.
Claim 12
Dependent Claim
27 words
The method of claim 9, and comparing said output electric signal with the measured motion of said transducer to obtain an accurate measurement of the transducer''s characteristics.
Claim 13
Independent Claim
42 words
An apparatus for measuring the motion of a transducer comprising: a support platform for supporting said transducer; means moving said platform in accordance with a desired test signal; and means measuring the motion of said platform with reference to a freely-falling body.
Claim 14
Independent Claim
42 words
An apparatus for measuring the motion of a transducer comprising: a support platform for supporting said transducer; means moving said platform in accordance with a desired test signal; and means measuring the motion of said platform with reference to a freely-falling body.
Claim 15
Dependent Claim
14 words
The apparatus of claim 11 wherein said body freely falls within a vacuum chamber.
Claim 16
Independent Claim
61 words
A method of measuring the motion of a transducer comprising the steps of: mounting said transducer on a support platform; moving said platform in accordance with a desired test signal; precisely measuring the relative motion between said transducer and a reference body; and isolating said reference body from external vibrations by maintaining said reference body in a state of free fall.
Claim 17
Independent Claim
61 words
A method of measuring the motion of a transducer comprising the steps of: mounting said transducer on a support platform; moving said platform in accordance with a desired test signal; precisely measuring the relative motion between said transducer and a reference body; and isolating said reference body from external vibrations by maintaining said reference body in a state of free fall.
Claim 18
Dependent Claim
15 words
The method of claim 13 wherein said reference body is contained within an evacuated enclosure.
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |