US3602490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seismometer spring
Assignee: Mandrel Industries Inc
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Filing: 1969-09-24
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Granted: 1971-08-31
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Expires: 1989-09-24
Abstract
Abstract The two mediately positioned cantilevered rings of four spaced concentric rings of resilient spring material are joined to adjacent rings at diametrically opposite locations by resilient bridges to form a leaf spring structure having inner and outer support rings bridged to respective anchor sides of adjacent inner and outer mediately positioned cantilevered rings whose free ends are joined by a resilient bridge. In one embodiment the inner and outer rings are mounted respectively by a slipring assembly to the fixed reference and the suspended inertial mass to allow relative rotation between each of them and the leaf spring structure when subjected to tortuous forces.
Inventors
- 👤 Allen H Mueller
- 👤 Ernest Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:15
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
168 words
A flat spring for use in seismometers to suspend an inertial mass structure from a fixed reference rigid support structure which structures are coil and magnet assemblies comprising; first support member of resilient spring material for supporting the spring at one of said structures, a second support member of resilient spring material for supporting the spring at the other of the structures; and first and at least second concentrically nested spaced annular members of resilient spring material located between the support members, each of said annular members having an anchor side and free side at diametrically opposite locations, the first annular member fixed at the inside of its anchor side to be cantilevered from the first support member, the second annular member fixed at the outside of its anchor side to be cantilevered from the second support member circumjacent the first annular member to have its free side juxtaposed the free side of said first annular member, the juxtapositioned free sides of said cantilevered annular members joined together.
Claim 2
Dependent Claim
168 words
A flat spring for use in seismometers to suspend an inertial mass structure from a fixed reference rigid support structure which structures are coil and magnet assemblies comprising; first support member of resilient spring material for supporting the spring at one of said structures, a second support member of resilient spring material for supporting the spring at the other of the structures; and first and at least second concentrically nested spaced annular members of resilient spring material located between the support members, each of said annular members having an anchor side and free side at diametrically opposite locations, the first annular member fixed at the inside of its anchor side to be cantilevered from the first support member, the second annular member fixed at the outside of its anchor side to be cantilevered from the second support member circumjacent the first annular member to have its free side juxtaposed the free side of said first annular member, the juxtapositioned free sides of said cantilevered annular members joined together.
Claim 3
Dependent Claim
53 words
The spring according to claim 1 wherein the first and second support members are of an annular configuration, the first annular support member is concentrically nested and radially spaced within the first annular cantilevered member, and the second annular support member is concentrically nested and radially spaced circumjacent the second annular cantilevered member.
Claim 4
Dependent Claim
33 words
The spring according to claim 2 further comprising bridge portions joining the anchor sides of the annular cantilevered members to the support members and the free sides of the annular cantilevered members together.
Claim 5
Dependent Claim
63 words
The spring according to claim 2 wherein the annular support members and cantilevered members are portions of a thin sheet of resilient spring material having at least three spaced generally concentric arcuate slots each of which has a pair of slot ends and a midpoint, the slots are relatively oriented with the midpoint of each slot located diametrically opposite that of adjacent slots.
Claim 6
Dependent Claim
41 words
The spring according to claim 1 wherein each of the annular cantilevered members has a varying width along its extent with the width maximum at its anchor and free sides and minimum about halfway in between the anchor and free sides.
Claim 7
Dependent Claim
16 words
The spring according to claim 5 wherein the minimum width is approximately one-half the maximum width.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |