Patent US4547771A successfully refreshed from Google Patents.
US4547771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration sensor
Assignee: Chesterton AW Co
•
Filing: 1982-08-13
•
Granted: 1985-10-15
•
Expires: 2002-08-13
Abstract
Abstract In a vibration level indicator of the type having a vibration transducer and means for determining the average vibration level, the improvement having a storage element for holding a reference value corresponding to a selected level of the vibrations, and compare and display means responsive to the storage element and the transducer for indicating the relative relationship between the average level and the selected level.
Inventors
- 👤 Robert E. Rockwood
- 👤 Victor Ximenes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:58
CPC Classifications
G; G01; G01H; G01H1/00; G08; G08B; G08B21/00; G08B21/18; G08B21/182
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
An apparatus for indicating changes in the average level of vibrations in a vibrating object compared with a selected constant level of vibrations, said vibrating object being characterized in that said average level normally alternates above and below said constant level, spending equal amounts of time on either side of said selected constant level, said apparatus having a transducer for sensing said vibrations and means responsive to said transducer for determining said average level, the improvement wherein said means comprises a storage element for holding a reference value corresponding to said selected level of said vibrations, and compare and indicator means responsive to said storage element and said transducer for indicating the relationship between said average level and said reference value, said compare and indicator means having an indicator which alternates equally between two discrete perceptible states when said average level is alternating equally above and below said reference value, and any changes in said relationship are represented by changes in the relative proportion of time during which said indicator occupies each of said two states.
Claim 2
Independent Claim
176 words
An apparatus for indicating changes in the average level of vibrations in a vibrating object compared with a selected constant level of vibrations, said vibrating object being characterized in that said average level normally alternates above and below said constant level, spending equal amounts of time on either side of said selected constant level, said apparatus having a transducer for sensing said vibrations and means responsive to said transducer for determining said average level, the improvement wherein said means comprises a storage element for holding a reference value corresponding to said selected level of said vibrations, and compare and indicator means responsive to said storage element and said transducer for indicating the relationship between said average level and said reference value, said compare and indicator means having an indicator which alternates equally between two discrete perceptible states when said average level is alternating equally above and below said reference value, and any changes in said relationship are represented by changes in the relative proportion of time during which said indicator occupies each of said two states.
Claim 3
Dependent Claim
24 words
The improvement of claim 1 wherein said storage element is controllable for updating said reference value to correspond to the current said average level.
Claim 4
Dependent Claim
47 words
The improvement of claim 1 wherein said compare and indicator means comprises a comparator for providing a signal when said average level is greater than said selected constant level, and said indicator is responsive to said comparator and arranged to be activated when said signal is provided.
Claim 5
Dependent Claim
73 words
The improvement of claim 3 further comprising an additional comparator for providing a further signal when said average level is less than said selected constant level, and an additional visual indicator responsive to said additional comparator and arranged to be activated when said further signal is provided, whereby when fluctuations of said average level are centered on said selected constant level, said visual indicators are activated alternately at the frequency of said fluctuations.
Claim 6
Dependent Claim
47 words
The improvement of claim 1 wherein said compare and indicator means comprises a comparator for providing a signal when said average level is less than said selected constant level, and said indicator is responsive to said comparator and arranged to be activated when said signal is provided.
Claim 7
Dependent Claim
43 words
The improvement of claim 3, 4 or 5 wherein said storage element is a controllable voltage source, said reference value is a first voltage, said means for determining provides a second voltage corresponding to said average level, and said comparator compares said voltages.
Claim 8
Dependent Claim
25 words
The improvement of claim 1 wherein said compare and indicator means comprises a readout element for displaying said average level and said selected constant level.
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) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |