US4400979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Force transducer flexure with conductors on surfaces in the neutral bending plane
Assignee: Honeywell International Inc
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Filing: 1981-07-14
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Granted: 1983-08-30
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Expires: 2001-07-14
Abstract
Abstract A flexure in a force transducer, as an inertial guidance accelerometer, for securing a force sensitive element to a mounting base includes one or more flexure sections having one or more recessed surfaces which are substantially coincident with the neutral bending plane of the flexure. Electrically conductive coating on the recessed surfaces provide electrical connections to components located on the force sensitive element. The conductive coatings on or near the neutral bending plane of the flexure sections minimizes bending moments caused by stresses set up between the conductive coatings and the flexure which may in turn lead to bias errors. At the same time, the flexure configuration provides for the desired strength and spring rate for the force sensitive element.
Inventors
- 👤 Richard A. Hanson
- 👤 Kim W. Atherton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:46
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/02; G01P15/08; G01P15/13; G01P15/132
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
119 words
In a transducer having a mounting base and a force sensitive member having an electrical element, a flexure for securing the member to the mounting base, comprising: at least one flexure section having a pair of faces and a pair of edge surfaces extending between said member and said mounting base; at least one channel having a recessed surface extending into said section from one of said faces wherein at least one of said recessed surfaces is contiguous to one of said edge surfaces, said recessed surfaces being substantially aligned with the neutral bending axis of said flexure section; and an electrically conductive material disposed on said recessed surface extending between said force sensitive member and said mounting base.
Claim 2
Dependent Claim
119 words
In a transducer having a mounting base and a force sensitive member having an electrical element, a flexure for securing the member to the mounting base, comprising: at least one flexure section having a pair of faces and a pair of edge surfaces extending between said member and said mounting base; at least one channel having a recessed surface extending into said section from one of said faces wherein at least one of said recessed surfaces is contiguous to one of said edge surfaces, said recessed surfaces being substantially aligned with the neutral bending axis of said flexure section; and an electrically conductive material disposed on said recessed surface extending between said force sensitive member and said mounting base.
Claim 3
Dependent Claim
113 words
In a transducer having a mounting base and a force sensitive member having an electrical element, a flexure for securing the member to the mounting base, comprising: at least one flexure section having a pair of faces and a pair of edge surfaces extending between said member and said mounting base; at least one channel having a recessed surface extending into said section from one of said faces wherein at least one of said recessed surfaces contiguous to one of said edge surfaces, said recessed surfaces being spaced substantially equidistance from said faces; and an electrically conductive material disposed on said recessed surface extending between said force sensitive member and said mounting base.
Claim 4
Dependent Claim
113 words
In a transducer having a mounting base and a force sensitive member having an electrical element, a flexure for securing the member to the mounting base, comprising: at least one flexure section having a pair of faces and a pair of edge surfaces extending between said member and said mounting base; at least one channel having a recessed surface extending into said section from one of said faces wherein at least one of said recessed surfaces contiguous to one of said edge surfaces, said recessed surfaces being spaced substantially equidistance from said faces; and an electrically conductive material disposed on said recessed surface extending between said force sensitive member and said mounting base.
Claim 5
Dependent Claim
131 words
In an accelerometer having a mounting base and a paddle which carries a first restoring coil, a flexure for securing the paddle to the mounting base, comprising: first and second flexure sections separated by an intervening aperture, said sections extending between said paddle and said mounting base; said flexure sections having upper and lower faces terminating in first and second edge surfaces; a channel in each of said flexure sections having a recessed surface extending into said first section from said upper face, said first recessed surface being disposed contiguous to the edge surface located at said intervening aperture; said recessed surfaces being substantially coincident with the neutral bending plane of the flexure sections; and an electrically conductive coating on the recessed surfaces extending between the mounting base and the paddle.
Claim 6
Dependent Claim
131 words
In an accelerometer having a mounting base and a paddle which carries a first restoring coil, a flexure for securing the paddle to the mounting base, comprising: first and second flexure sections separated by an intervening aperture, said sections extending between said paddle and said mounting base; said flexure sections having upper and lower faces terminating in first and second edge surfaces; a channel in each of said flexure sections having a recessed surface extending into said first section from said upper face, said first recessed surface being disposed contiguous to the edge surface located at said intervening aperture; said recessed surfaces being substantially coincident with the neutral bending plane of the flexure sections; and an electrically conductive coating on the recessed surfaces extending between the mounting base and the paddle.
Claim 7
Dependent Claim
24 words
The flexure of claim 3, wherein the second flexure section is substantially identical to the first flexure section but has an anti-symmetric relationship therewith.
Claim 8
Dependent Claim
43 words
The flexure of claim 3, wherein the second flexure section is substantially a mirror image of the first section such that the second section is symmetric to said first section with respect to a plane bisecting said aperture and normal to said faces.
Claim 9
Dependent Claim
23 words
The flexure of claim 4 or 5, wherein the width of each flexure section is approximately one and one-half times the length thereof.
Claim 10
Dependent Claim
24 words
The flexure of claim 4 or 5, wherein the depth of the channels is substantially one-half the distance between the faces of the sections.
Claim 11
Dependent Claim
28 words
The flexure of claim 4 or 5, wherein the distance between the faces of each section is on the order of one one-hundredth the length of each section.
Claim 12
Dependent Claim
157 words
In an accelerometer having a mounting base and a paddle which carries a first restoring coil, a flexure for securing the paddle to the mounting base, comprising: first and second flexure sections separated by an intervening aperture, said sections extending between said paddle and said mounting base; said flexure sections having upper and lower faces terminating in first and second edge surfaces; a first channel in each of said flexure sections having a first recessed surface extending into said first section from one of said faces, said first recessed surface being contiguous to the edge surface located at said intervening aperture; a second channel having a second recessed surface extending into said first section from the other of said faces; said first and second recessed surfaces being substantially coplanar and coincident with the neutral bending plane of the flexure section; and an electrically conductive coating on the recessed surfaces extending between the mounting base and the paddle.
Claim 13
Dependent Claim
157 words
In an accelerometer having a mounting base and a paddle which carries a first restoring coil, a flexure for securing the paddle to the mounting base, comprising: first and second flexure sections separated by an intervening aperture, said sections extending between said paddle and said mounting base; said flexure sections having upper and lower faces terminating in first and second edge surfaces; a first channel in each of said flexure sections having a first recessed surface extending into said first section from one of said faces, said first recessed surface being contiguous to the edge surface located at said intervening aperture; a second channel having a second recessed surface extending into said first section from the other of said faces; said first and second recessed surfaces being substantially coplanar and coincident with the neutral bending plane of the flexure section; and an electrically conductive coating on the recessed surfaces extending between the mounting base and the paddle.
Claim 14
Dependent Claim
24 words
The flexure of claim 9, wherein the second flexure section is substantially identical to the first flexure section but has an anti-symmetric relationship therewith.
Claim 15
Dependent Claim
43 words
The flexure of claim 9, wherein the second flexure section is substantially a mirror image of the first section such that the second section is symmetric to said first section with respect to a plane bisecting said aperture and normal to said faces.
Claim 16
Dependent Claim
23 words
The flexure of claim 10 or 11, wherein the width of each flexure section is approximately one and one-half times the length thereof.
Claim 17
Dependent Claim
24 words
The flexure of claim 10 or 11, wherein the depth of the channels is substantially one-half the distance between the faces of the sections.
Claim 18
Dependent Claim
28 words
The flexure of claim 10 or 11, wherein the distance between the faces of each section is on the order of one one-hundredth the length of each section.
References Cited (Backward Citations)
US3229530A
Cited
US3331253A
Cited
US3339419A
Cited
US3513711A
Cited
US3702073A
Cited
US4182187A
Cited
US4250757A
Cited
US4342227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |