US3824845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of transferring electrical data signals from moving bodies
Assignee: Newport News Shipbuilding and Dry Dock Co
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Filing: 1972-12-22
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Granted: 1974-07-23
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Expires: 1992-12-22
Abstract
Abstract Method of transferring electrical data signals from moving bodies, particularly low frequency, low level signals such as generated by strain gages. The method is distinguished in its use of an input holding capacitor to transmit low impedance signals while eliminating high impedance signals, such that a continued output signal is provided, notwithstanding discontinuous contact between sliding contact devices attached to the moving body and brushes attached to the receiving signal circuit.
Inventors
- 👤 H Huebner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:54
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/02; G01L3/04; G01L3/10; G01L3/108; G01L1/00; G01L1/20; G01L1/22; G01L1/225
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A method of transferring electrical data signals from a moving body comprising: A. conducting an excitation signal into said moving body through a first sliding contact device; B. modifying said signal such that it is representative of a physical parameter of said body; C. conditioning said signal to provide a low impedance output signal; D. conducting said output signal off said body through a second sliding contact device which is in parallel with a holding capacitor; E. detecting said output signals across said holding capacitor by means of a high impedance circuit such that said capacitor holds the value of the output signal during moments when said second sliding contact device experiences electrical discontinuities between the contacts; and F. registering said output signal as an indication of said physical parameter of said body.
Claim 2
Independent Claim
133 words
A method of transferring electrical data signals from a moving body comprising: A. conducting an excitation signal into said moving body through a first sliding contact device; B. modifying said signal such that it is representative of a physical parameter of said body; C. conditioning said signal to provide a low impedance output signal; D. conducting said output signal off said body through a second sliding contact device which is in parallel with a holding capacitor; E. detecting said output signals across said holding capacitor by means of a high impedance circuit such that said capacitor holds the value of the output signal during moments when said second sliding contact device experiences electrical discontinuities between the contacts; and F. registering said output signal as an indication of said physical parameter of said body.
Claim 3
Independent Claim
112 words
A system of transferring electrical data signals from rotating shafts comprising: A. an off-shaft circuit including: i. a DC power supply in electrical contact with a rotating shaft; and ii. a signal receiving circuit in electrical contact with said rotating shaft; and B. an on-shaft circuit positioned intermediate said DC power supply and said signal receiving circuit and further including electrically connected in said on-shaft circuit: i. a power supply connected to receive power from said DC power supply; ii. a capacitor connected between said rotating shaft and said power supply; iii. a strain gage bridge connected to said power supply; and iv. an amplifier electrically connected to said strain gage bridge.
Claim 4
Independent Claim
112 words
A system of transferring electrical data signals from rotating shafts comprising: A. an off-shaft circuit including: i. a DC power supply in electrical contact with a rotating shaft; and ii. a signal receiving circuit in electrical contact with said rotating shaft; and B. an on-shaft circuit positioned intermediate said DC power supply and said signal receiving circuit and further including electrically connected in said on-shaft circuit: i. a power supply connected to receive power from said DC power supply; ii. a capacitor connected between said rotating shaft and said power supply; iii. a strain gage bridge connected to said power supply; and iv. an amplifier electrically connected to said strain gage bridge.
Claim 5
Dependent Claim
59 words
A system of transferring electrical data signals from rotating shafts as in claim 2, wherein said signal receiving circuit includes: A. a pair of brushes in contact with said shaft; B. electrical leads from said brushes; C. an input holding capacitor connected between said leads; and D. an amplifier connected to said leads subsequent to said input holding capacitor.
Claim 6
Dependent Claim
29 words
A system of transferring electrical data signals from rotating shAfts as in claim 3, wherein said signal receiving circuit has a low charging impedance and a high discharging impedance.
Claim 7
Dependent Claim
26 words
A system of transferring electrical data signals from rotating shafts as in claim 4, wherein said shafts are supplied with slip rings contactable with said brushes.
Claim 8
Dependent Claim
39 words
A system of transferring electrical data signals from rotating shafts as in claim 5, wherein said receiving circuit capacitor has a value of 20 microfarads with a charging resistance of 10 ohms and a discharging resistance of 200k ohms.
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) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |