Patent US3830091A successfully refreshed from Google Patents.
US3830091A
Expired / Lapsed
US
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Accelerometer comparator
Assignee: United States Department of the Navy
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Filing: 1973-04-05
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Granted: 1974-08-20
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Expires: 1993-04-05
Abstract
Abstract An accelerometer test system using an aluminum rod as a shaker or vibrator for comparing the performance of a test accelerometer with a standard accelerometer. The rod is driven by piezoelectric crystals affixed to its sides. The outputs of both accelerometers at ten different frequencies are amplified, filtered and displayed on a digital voltmeter and on an oscilloscope.
Inventors
- 👤 J Sinsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:39
CPC Classifications
G; G01; G01P; G01P21/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
A device for comparing a test accelerometer with a standard accelerometer comprising: vertical aluminum rod means on the end of which is mounted said test accelerometer and said standard accelerometer; at least one driving crystal connected to the opposite sides of the middle of said aluminum rod means to cause it to vibrate longitudinally at a number of harmonic frequencies; generating means for supplying a high amplitude alternating voltage to said driving crystals; and, detecting means for comparing the output of said test accelerometer and said standard accelerometer.
Claim 2
Independent Claim
88 words
A device for comparing a test accelerometer with a standard accelerometer comprising: vertical aluminum rod means on the end of which is mounted said test accelerometer and said standard accelerometer; at least one driving crystal connected to the opposite sides of the middle of said aluminum rod means to cause it to vibrate longitudinally at a number of harmonic frequencies; generating means for supplying a high amplitude alternating voltage to said driving crystals; and, detecting means for comparing the output of said test accelerometer and said standard accelerometer.
Claim 3
Dependent Claim
29 words
The device of claim 1 wherein said aluminum rod means comprises a rod having a length of approximately 100.5 inches and a cross-sectional area of approximately 2 square inches.
Claim 4
Dependent Claim
32 words
The device of claim 2 wherein said generating means comprises: an oscillator for producing an alternating output signal; an amplifier connected to said oscillator; and, a step-up transformer connected to said amplifier.
Claim 5
Dependent Claim
18 words
The device of claim 3 wherein said detecting means comprises a voltmeter and an oscilloscope connected in parallel.
References Cited (Backward Citations)
US2873426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |