US3704961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for a cycloid propeller for ships
Assignee: Siemens AG
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Filing: 1971-06-15
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Granted: 1972-12-05
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Expires: 1991-06-15
Abstract
Abstract A servo motor controlled by a speed control lever and a servo motor controlled by a steering wheel adjust the position of the control point of the pivoted blades of a cycloid propeller in two directions. The control connection between the lever and the servo motor controlled thereby includes a first signal transmitter and the control connection between the wheel and the servo motor controlled thereby includes a second signal transmitter. The signal provided by the first signal transmitter is controlled as a function of a function generator supplied with the signal provided by the second transmitter.
Inventors
- 👤 Kurt Fork
- 👤 Werner Fork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:12
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/04; B63H1/06; B63H1/08; B63H1/10; B63H2001/105
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
131 words
A control system for a cycloid propeller having pivoted blades having a control pint, first and second servo motors, a speed control lever controlling the first servo motor and a steering wheel controlling the second servo motor to adjust the position of the control point of the blades in two directions, said control system comprising a first control connection between the lever and the first servo motor, control connection including a first signal transmitter for producing a first signal; a second control connection between the wheel and the second servo motor, the second control connection including a second signal transmitter for producing a second signal; a function generator for controlling the first signal as a function of the function generator; and means for supplying the second signal to the function generator.
Claim 2
Dependent Claim
131 words
A control system for a cycloid propeller having pivoted blades having a control pint, first and second servo motors, a speed control lever controlling the first servo motor and a steering wheel controlling the second servo motor to adjust the position of the control point of the blades in two directions, said control system comprising a first control connection between the lever and the first servo motor, control connection including a first signal transmitter for producing a first signal; a second control connection between the wheel and the second servo motor, the second control connection including a second signal transmitter for producing a second signal; a function generator for controlling the first signal as a function of the function generator; and means for supplying the second signal to the function generator.
Claim 3
Dependent Claim
38 words
A control system as claimed in claim 1, wherein the first control connection includes a multiplier having one input connected to the first signal transmitter and another input coupled to the second signal transmitter via the function generator.
Claim 4
Dependent Claim
97 words
A control system as claimed in claim 1, wherein each of the first and second servo motors has an axis and the blades have a direction of eccentricities for a straight ahead course, and wherein the first control connection includes computer means and the second control connection includes computer means for computing the relations x cos gamma + y sin gamma and - x sin gamma + y cos gamma wherein gamma is the angle between the axis of one of the first and second servo motors and the direction of eccentricities for a straight ahead course.
Claim 5
Dependent Claim
13 words
A control system as claimed in claim 2, further comprising another control connection.
References Cited (Backward Citations)
DE898406C
Cited
US3241618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |