US4030371A
Expired / Lapsed
US
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Gyroscopic apparatus
Assignee: National Research Development Corp UK
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Filing: 1975-09-26
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Granted: 1977-06-21
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Expires: 1995-09-26
Abstract
Abstract Gyroscopic apparatus in which the rotor is elastically-connected to its drive, whereby deflection of the rotor bends the connection and thus sets up a deflection torque which acts upon the rotor. The connection of the rotor to the drive also includes masses carried by springs. When the rotor deflects, these masses oscillate in directions parallel to the driving axis, and when the rotor is spinning at a certain (tuning) speed the sum of the oscillating forces exerted upon the rotor by the individual moving masses will be a steady quantity which may be made equal and opposite to the deflection torque. The apparatus may thus behave like a "free rotor" gyroscope.
Inventors
- 👤 David Nicholas Bulman
- 👤 Leonard Maunder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:21
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/22; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1282; Y10T74/1293; Y10T74/1296
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
192 words
Gyroscopic apparatus in which: a driving element is rotatable about a driving axis; a rotor has its center of gravity on said driving axis; there is an elastic connection between said rotor and said driving element; said elastic connection constrains said rotor to rotate normally in a plane lying at right angles to said driving axis, but permits it to deflect from said plane against elastic resistance; said elastic connection includes a plurality of similar structures joining said rotor to said driving element and capable of exerting torque upon said rotor when deflected; said structures each comprise a mass, a first member connecting said mass to said driving element and a second member connecting said mass to said rotor; said first and second members are resilient in directions substantially parallel to said driving axis, whereby said masses have freedom to move in similar directions against elastic restraint; and said restrained movement of said masses results in variation of said torque exerted by said structures upon said rotor when deflected, whereby at certain rotor speeds the resultant of said torques substantially compensates for any other external torques to which said rotor is subject.
Claim 2
Dependent Claim
192 words
Gyroscopic apparatus in which: a driving element is rotatable about a driving axis; a rotor has its center of gravity on said driving axis; there is an elastic connection between said rotor and said driving element; said elastic connection constrains said rotor to rotate normally in a plane lying at right angles to said driving axis, but permits it to deflect from said plane against elastic resistance; said elastic connection includes a plurality of similar structures joining said rotor to said driving element and capable of exerting torque upon said rotor when deflected; said structures each comprise a mass, a first member connecting said mass to said driving element and a second member connecting said mass to said rotor; said first and second members are resilient in directions substantially parallel to said driving axis, whereby said masses have freedom to move in similar directions against elastic restraint; and said restrained movement of said masses results in variation of said torque exerted by said structures upon said rotor when deflected, whereby at certain rotor speeds the resultant of said torques substantially compensates for any other external torques to which said rotor is subject.
Claim 3
Dependent Claim
36 words
Gyroscopic apparatus according to claim 1, in which the entire spans of said structures and said masses carried by said structures lie substantially in the plane of rotation of said rotor including its center of gravity.
Claim 4
Dependent Claim
70 words
Gyroscopic apparatus according to claim 2, in which said structures comprise lightweight and resilient spokes, each carrying said mass located at a point along its length, whereby the motion of said rotor when deflected from its normal plane of rotation causes said loaded spokes to oscillate as spring-mass-spring systems whereby the said carried masses oscillate in a direction substantially parallel to said driving axis to set up said compensating torques.
Claim 5
Dependent Claim
25 words
Gyroscopic apparatus according to claim 3 in which the length of each spoke between said carried mass and said driving element is stiff in torsion.
Claim 6
Dependent Claim
54 words
Gyroscopic apparatus according to claim 1 in which said elastic connection also includes a thin shaft connecting said driving axis of said driving element to the axis of said rotor and normally coaxial with both of said axes but able to flex elastically to allow these two said axes to move out of alignment.
Claim 7
Dependent Claim
33 words
Gyroscopic apparatus according to claim 3 in which there are at least two pairs of said spokes, the spokes of each pair being located diametrically opposite to each other about said driving axis.
Claim 8
Dependent Claim
51 words
Gyroscopic apparatus according to claim 6, in which the said masses carried by each of a said diametrically-opposite pair of spokes are rigidly connected by connecting members so that said masses and their rigid connecting members oscillate as a joint mass when said rotor is deflected from its said normal plane.
Claim 9
Dependent Claim
57 words
Gyroscopic apparatus according to claim 1 in which said plurality of mass-carrying structures radiate from a split-tapered central member co-operating with a tapered member on said driving element, whereby by varying the engagement of the two tapers the radial tension of said structures and the character of said motion of said carried masses may be varied also.
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |