US3673873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensing instrument having a cantilevered proof mass
Assignee: Boeing North American Inc
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Filing: 1969-10-23
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Granted: 1972-07-04
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Expires: 1989-10-23
Abstract
Abstract Inertial sensing instrument, particularly accelerometers, that utilize a cantilevered proof mass having a flexure pivot for the inertial sensing element. Chemical etching is used to provide a smooth convex taper to the proof mass so as to establish the cantilever.
Inventors
- 👤 Joseph F Estes
- 👤 Imre Kertesz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:49
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
An accelerometer comprising in combination: a ring shaped base member tapered from a central portion of said base member in a first direction; a disc shaped proof mass fitting within said ring shaped base member, cantilevered from the tapered end of said base member in an opposite direction and extending beyond said central portion; a first and second, flat surfaced stator body clamped on either side of said base member such that said base member is cantilevered from said stator bodies at said central portion to provide for movement of said base member in the area provided by said taper; and pickoff means having a first part on said proof mass and a second part mounted on said stator bodies.
Claim 2
Dependent Claim
120 words
An accelerometer comprising in combination: a ring shaped base member tapered from a central portion of said base member in a first direction; a disc shaped proof mass fitting within said ring shaped base member, cantilevered from the tapered end of said base member in an opposite direction and extending beyond said central portion; a first and second, flat surfaced stator body clamped on either side of said base member such that said base member is cantilevered from said stator bodies at said central portion to provide for movement of said base member in the area provided by said taper; and pickoff means having a first part on said proof mass and a second part mounted on said stator bodies.
Claim 3
Dependent Claim
17 words
The accelerometer according to claim 1 wherein said proof mass is centrally disposed within said base member.
Claim 4
Dependent Claim
17 words
The accelerometer according to claim 1 wherein said proof mass is centrally disposed within said base member.
Claim 5
Dependent Claim
31 words
The accelerometer according to claim 1 wherein said proof mass including said base member is tapered to form convex upper and lower surfaces over approximately one half of the proof mass.
Claim 6
Dependent Claim
31 words
The accelerometer according to claim 1 wherein said proof mass including said base member is tapered to form convex upper and lower surfaces over approximately one half of the proof mass.
Claim 7
Dependent Claim
38 words
The accelerometer according to claim 1 wherein said base member is annularly disposed about said proof mass and only a sector of the base member is tapered to provide cantilever over the tapered sEctor of said base member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |