US3657918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Performance monitor for a vertical gyro
Assignee: Bendix Corp
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Filing: 1969-06-19
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Granted: 1972-04-25
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Expires: 1989-06-19
Abstract
Abstract Apparatus for monitoring a vertical gyro includes means for monitoring gyro vertically in the roll axis as a function of true air speed and rate of turn and monitoring vertically in the pitch axis as a function of air speed rate of change.
Inventors
- 👤 Charles E Hurlbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:31
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/44; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1232; Y10T74/1254; Y10T74/1261
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
225 words
A vertical gyro system for aircraft comprising: a pendulum mounted to the craft so as to be responsive to displacement thereof about the pitch axis; means connected to the gyro and to the pendulum for providing a signal corresponding to the difference between gyro and pendulum positions when the craft is displaced about the pitch axis; means for providing an aircraft airspeed signal; means connected to the pitch axis difference signal means And the airspeed signal means and responsive to the signals therefrom for providing a pitch axis monitoring signal; means for providing an aircraft heading signal; a second pendulum mounted to the craft so as to be responsive to displacement thereof about the roll axis; means connected to the gyro and to the second pendulum for providing a signal corresponding to the difference between gyro and pendulum positions when the craft is displaced about the roll axis; means connected to the roll axis difference signal means, the heading signal means and the airspeed signal means and responsive to the signals therefrom for providing a roll axis monitoring signal; means connected to the roll axis signal means and responsive to the signal therefrom for monitoring gyro verticality; and means connected to the roll axis monitoring signal means and to the pitch axis monitoring signal means and responsive to the signals therefrom for monitoring gyro verticality.
Claim 2
Dependent Claim
225 words
A vertical gyro system for aircraft comprising: a pendulum mounted to the craft so as to be responsive to displacement thereof about the pitch axis; means connected to the gyro and to the pendulum for providing a signal corresponding to the difference between gyro and pendulum positions when the craft is displaced about the pitch axis; means for providing an aircraft airspeed signal; means connected to the pitch axis difference signal means And the airspeed signal means and responsive to the signals therefrom for providing a pitch axis monitoring signal; means for providing an aircraft heading signal; a second pendulum mounted to the craft so as to be responsive to displacement thereof about the roll axis; means connected to the gyro and to the second pendulum for providing a signal corresponding to the difference between gyro and pendulum positions when the craft is displaced about the roll axis; means connected to the roll axis difference signal means, the heading signal means and the airspeed signal means and responsive to the signals therefrom for providing a roll axis monitoring signal; means connected to the roll axis signal means and responsive to the signal therefrom for monitoring gyro verticality; and means connected to the roll axis monitoring signal means and to the pitch axis monitoring signal means and responsive to the signals therefrom for monitoring gyro verticality.
Claim 3
Dependent Claim
86 words
A system as described by claim 11, wherein the means for providing a roll axis monitoring signal includes: a rate generator connected to the heading signal means and to the airspeed signal means and responsive to the signals therefrom for providing a signal corresponding to the centripetal force of the craft; and a comparator connected to the rate generator and to the roll axis difference signal means for comparing the signals therefrom and for providing the roll axis monitoring signal in accordance with the difference therebetween.
Claim 4
Dependent Claim
105 words
A system as described by claim 1, wherein the vertical gyro includes: a roll axis synchro having a rotor, a winding carried by the rotor and a stator winding inductively coupled to the rotor winding; a pitch axis synchro having a rotor, a winding carried by the rotor and a stator winding inductively coupled to the rotor winding; a roll axis torquer having a rotor coupled to the rotor of the roll axis synchro and a pair of inductively coupled windings; and a pitch axis torquer having a rotor coupled to the rotor of the roll axis synchro and a pair of inductively coupled windings.
Claim 5
Dependent Claim
104 words
A system as described by claim 3 wherein the pendulum includes: a roll axis pendulum having a stator winding connected to the stator winding of the roll axis synchro, a pendulus mass sensitive to displacement of the craft about the roll axis and a winding carried by the pendulus mass and inductively coupled to the stator winding; and a pitch axis pendulum having a stator winding connected to the stator winding of the pitch axis synchro, a pendulus mass sensitive to displacement of the craft about the pitch axis and a winding carried by the pendulus mass and inductively coupled to the stator winding.
Claim 6
Dependent Claim
106 words
A system as described by claim 4, including: a first normally closed switch for connecting one of the windings of the roll axis torquer to the winding carried by the pitch axis pendulus mass. a second normally closed switch for connecting one of the windings of the pitch axis torquer to the winding carried by the roll axis pendulus mass; means connected to the rate generator and responsive to the centripetal force signal therefrom above a predetermined level for opening the first switch; and means connected to the differentiator and responsive to the differentiated airspeed signal therefrom above a predetermined level for opening the second switch.
Claim 7
Dependent Claim
143 words
A system as described by claim 5, wherein: the means connected to the rate generator and responsive to the centripetal force signal therefrom above a predetermined level for opening the first switch includes a threshold detector for detecting when the centripetal force signal exceeds the predetermined level and thereupon providing a controlling output, and a relay connected to the threshold detector and connected to the first switch, and energized by the controlling output for closing said switch; and the means connected to the differentiator and responsiVe to the differentiated airspeed signal therefrom above a predetermined level includes another threshold detector for detecting when the differentiated airspeed signal exceeds the predetermined level and thereupon providing another controlling output, and another relay connected to the other threshold detector and connected to the second switch, and energized by the other controlling output for closing said switch.
Claim 8
Dependent Claim
57 words
A system as described by claim 5, including: A source of alternating current connected to the roll axis synchro rotor winding, the pitch axis synchro rotor winding, the other of the pitch axis torquer windings and the other of the roll axis torquer windings for exciting said roll and pitch synchros and said roll and pitch torquers.
Claim 9
Dependent Claim
43 words
A system as described by claim 5, including: an amplifier connected intermediate the first switch and the winding carried by the pitch axis pendulus mass; and another amplifier connected intermediate the second switch and the winding carried by the roll axis pendulus mass.
Claim 10
Dependent Claim
111 words
A system as described by claim 1, wherein the means connected to the roll axis monitoring signal means and to the pitch axis monitoring signal means and responsive to the signals therefrom for monitoring gyro verticality includes: gating means connected to the roll axis monitoring signal means and to the pitch axis monitoring signal means and responsive to the signals therefrom for providing a controlling output when one of said signals exceeds a predetermined level; filter means connected to the gating means for filtering the controlling output; and indicating means connected to the filter means and responsive to the filtered control signal for actuating the indicating means to signal verticality error.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |