US3832906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gimbal structure for dynamically tuned free rotor gyro
Assignee: TDY Industries LLC
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Filing: 1973-07-30
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Granted: 1974-09-03
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Expires: 1993-07-30
Abstract
Abstract A dynamically tuned, free rotor gyro is provided with three concentric gimbals. The principal moments of inertia of the gimbals are selected to completely cancel the errors of twice spin frequency rectification effects by merely adjusting the inertias of the gimbals.
Inventors
- 👤 R Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:32
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/22; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1293
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
In a tuned free rotor gyroscope having a rotor and a shaft for supplying rotational motion to the rotor, means coupling the rotor to the shaft comprising: a first gimbal member Intermediate the shaft and rotor, said first gimbal having a pair of diametrically opposite points of attachment to the rotor and a pair of diametrically opposite points of attachment to the shaft; a second gimbal member intermediate the shaft and rotor, said second gimbal member having a pair of diametrically opposite points of attachment to the rotor and a pair of diametrically opposite points of attachment to the shaft, said second gimbal member attachment points being relatively displaced from said first gimbal member attachment points by more than 90*; and a third gimbal member intermediate the shaft and rotor, said third gimbal member having a pair of diametrically opposite points of attachment to the rotor and a pair of diametrically opposite points of attachment to the shaft, said third gimbal member attachment points being relatively displaced from said first and second gimbal member attachment points by more than 90*.
Claim 2
Dependent Claim
180 words
In a tuned free rotor gyroscope having a rotor and a shaft for supplying rotational motion to the rotor, means coupling the rotor to the shaft comprising: a first gimbal member Intermediate the shaft and rotor, said first gimbal having a pair of diametrically opposite points of attachment to the rotor and a pair of diametrically opposite points of attachment to the shaft; a second gimbal member intermediate the shaft and rotor, said second gimbal member having a pair of diametrically opposite points of attachment to the rotor and a pair of diametrically opposite points of attachment to the shaft, said second gimbal member attachment points being relatively displaced from said first gimbal member attachment points by more than 90*; and a third gimbal member intermediate the shaft and rotor, said third gimbal member having a pair of diametrically opposite points of attachment to the rotor and a pair of diametrically opposite points of attachment to the shaft, said third gimbal member attachment points being relatively displaced from said first and second gimbal member attachment points by more than 90*.
Claim 3
Dependent Claim
33 words
The coupling means of claim 1 wherein each point of attachment to the shaft of each of said gimbal members is displaced from the adjacent points of attachment to the rotor by 90*.
Claim 4
Dependent Claim
23 words
The coupling means of claim 1 wherein each of said gimbal members is a cylinder concentric and coaxial with the shaft and rotor.
Claim 5
Dependent Claim
19 words
The coupling means of claim 3 wherein the axes of rotation of the points of attachment are all coplanar.
Claim 6
Dependent Claim
33 words
The coupling means of claim 1 wherein each of said points of attachment include a post member, a pad portion, and a flexural member adapted to be fastened between said post and pad.
Claim 7
Dependent Claim
29 words
The coupling means of claim 5 wherein said post members are coupled to the rotor and to the shaft and said pad portions are located on said gimbal members.
Claim 8
Dependent Claim
62 words
The coupling means of claim 1 wherein the moments of inertia of all of the gimbals are equal when expressed Ai + Bi - Ci, wherein i represents the gimbal, and Ai, Bi and Ci are the principal moments of inertia of the associated gimbal with the principal axis associated with Ci being substantially coincident with the spin axis of the shaft.
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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |