US3746044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic signal generator
Assignee: Johnson Service Co
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Filing: 1971-07-29
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Granted: 1973-07-17
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Expires: 1991-07-29
Abstract
Abstract A free fluid stream is established between a supply nozzle and a receiving nozzle. A hollow needle is fixedly mounted at one end and projects through the stream to define a cantilevered spring beam. The needle is offset slightly from the stream axis. A solid rod corresponding to the internal diameter of the needle is adjustably positioned within the hollow needle to control the spring characteristic. The hollow needle is deflected by the stream and returned into interfering relationship by the energy stored in the needle and internal rod to produce a periodic mechanical motion and a time varying fluidic output signal of a periodic wave form at the receiving nozzle.
Inventors
- 👤 Lean M Mc
- 👤 More D La
- 👤 W Velicer
- 👤 R Krishnaiyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:07
CPC Classifications
F; F15; F15C; F15C3/00; F15C3/16; F15B; F15B21/00; F15B21/12; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/218; Y10T137/2202; Y10T137/2207; Y10T137/2278; Y10T137/2322; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86413
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
122 words
A signal generating device for producing a time varying signal comprising stream forming means to establish a free fluid stream within an environment, a stream impeding rod-like element extending substantially perpendicular through said stream and being resiliently mounted in spaced relation to said stream and urged to an initial position in the path of said stream with the center line of the rod-like element adjacent the stream and offset from the center line of the stream and laterally movable by said stream from the path of said stream as a result of the engagement with said stream for selectively producing an essentially constant stream path, and sensing means downstream of said rod-like element to detect the presence and absence of the stream.
Claim 2
Dependent Claim
122 words
A signal generating device for producing a time varying signal comprising stream forming means to establish a free fluid stream within an environment, a stream impeding rod-like element extending substantially perpendicular through said stream and being resiliently mounted in spaced relation to said stream and urged to an initial position in the path of said stream with the center line of the rod-like element adjacent the stream and offset from the center line of the stream and laterally movable by said stream from the path of said stream as a result of the engagement with said stream for selectively producing an essentially constant stream path, and sensing means downstream of said rod-like element to detect the presence and absence of the stream.
Claim 3
Dependent Claim
22 words
The signal generating means of claim 1 wherein said sensing means includes a stream collecting orifice aligned with said stream forming means.
Claim 4
Dependent Claim
41 words
The signal generating device of claim 1 wherein said rod-like element includes a pivot support means mounted laterally offset from the axis of the fluid stream such that said stream is operative to move the member laterally from the stream path.
Claim 5
Dependent Claim
30 words
The signal generating device of claim 1 wherein said rod-like element is a resilient cantilevered spring element mounted to project into the path of said stream in an unstressed position.
Claim 6
Dependent Claim
64 words
The fluidic signal generating device of claim 4 wherein the axis of said spring element is laterally offset from the axis of said fluid stream, and a second spring element is slidably disposed contiguous to said first spring element, and a second mounting means is coupled to said second spring element to adjustably support said second spring element relative to said first spring element.
Claim 7
Dependent Claim
84 words
A signal generating device for producing a time varying signal comprising stream forming means to establish a fluid stream within an environment, and a stream impeding mechanical means resiliently mounted and urged to an initial position in the path of said stream and movable by said stream as a result of the engagement with said stream and, wherein said impeding mechanical means includes a means to vary the resiliency of the impeding member and thereby the frequency of the movement of said impeding member.
Claim 8
Dependent Claim
84 words
A signal generating device for producing a time varying signal comprising stream forming means to establish a fluid stream within an environment, and a stream impeding mechanical means resiliently mounted and urged to an initial position in the path of said stream and movable by said stream as a result of the engagement with said stream and, wherein said impeding mechanical means includes a means to vary the resiliency of the impeding member and thereby the frequency of the movement of said impeding member.
Claim 9
Dependent Claim
98 words
A signal generating device for producing a time varying signal comprising stream forming means to establish a fluid stream within an environment, and a stream impeding mechanical means resiliently mounted and urged to an initial position in the path of said stream and movable by said stream as a result of the engagement with said stream and wherein said mechanical means includes a tubular hollow needle extending perpendicularly of the path of said stream and defining a cantilevered spring element in the path of said stream, and a second solid spring rod element slidably disposed within said needle.
Claim 10
Dependent Claim
98 words
A signal generating device for producing a time varying signal comprising stream forming means to establish a fluid stream within an environment, and a stream impeding mechanical means resiliently mounted and urged to an initial position in the path of said stream and movable by said stream as a result of the engagement with said stream and wherein said mechanical means includes a tubular hollow needle extending perpendicularly of the path of said stream and defining a cantilevered spring element in the path of said stream, and a second solid spring rod element slidably disposed within said needle.
Claim 11
Dependent Claim
57 words
The signal generating device of claim 7 wherein said needle is formed of a resilient spring metal, mounting means fixedly mounting a portion of said needle in spaced relation to said stream to define said cantilevered spring element projecting into the path of said stream, and said second spring rod element being of a resilient spring metal.
Claim 12
Dependent Claim
22 words
The signal generating device of claim 8 wherein said needle includes an enlarged mounting base defining said means fixedly mounting the needle.
Claim 13
Dependent Claim
21 words
The signal generating device of claim 8 wherein said needle is cylindrical, and said second spring element is a solid rod.
Claim 14
Dependent Claim
41 words
The signal generating device of claim 8 wherein said needle extends completely through said stream path, and said second spring element is substantially longer than the length of the needle from the mounting means to the outer end of the needle.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |