US3581758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic-mechanical oscillator
Assignee: United States Department of the Navy
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Filing: 1969-10-24
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Granted: 1971-06-01
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Expires: 1989-10-24
Abstract
Abstract A fluidic mechanical oscillator having a bar with a central hollow hub mounted for rotating oscillation about an axis through the hub. A cylindrical drum rigidly mounted on a low-pressure air pipe is enclosed within a closed hub chamber leaving an annular space between the interior wall of the rotating hub and outside wall of the fixed drum. Within the annular space are placed a pair of ribbon roll valves, each consisting of a closed loop of flexible material which rolls with the rotating hub to open a pair of ports in the hub wall for only a few degrees of the bar''s oscillation and release a puff of pressurized fluid out of the ports. The fluid exits in a pair of jets at the ends of the bar directed tangentially and opposite to the direction of rotation of the bar and in phase with the oscillation. A portion of the jet is also released radially outward against an escapement release lever to provide the incremental time base for a timer.
Inventors
- 👤 Norman Czajkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:53
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/02; F15C1/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
106 words
An oscillator, comprising: a base; a spring-mass system mounted for oscillating motion on said base about an axis; a first pair of fluid nozzles mounted on said spring-mass and directing jets having components parallel to the direction of oscillation and opposite to each other; conduit means connected between said fluid nozzles and a source of pressurized fluid for conveying fluid from the source to said nozzles; and, valve means disposed in said conduit means and moving with said mass for releasing a puff of pressurized fluid from said fluid nozzles for each cycle of oscillation to supply the energy increment needed to compensate for frictional losses.
Claim 2
Dependent Claim
106 words
An oscillator, comprising: a base; a spring-mass system mounted for oscillating motion on said base about an axis; a first pair of fluid nozzles mounted on said spring-mass and directing jets having components parallel to the direction of oscillation and opposite to each other; conduit means connected between said fluid nozzles and a source of pressurized fluid for conveying fluid from the source to said nozzles; and, valve means disposed in said conduit means and moving with said mass for releasing a puff of pressurized fluid from said fluid nozzles for each cycle of oscillation to supply the energy increment needed to compensate for frictional losses.
Claim 3
Dependent Claim
35 words
The oscillator defined in claim 1, further comprising: a pair of radially directed fluid nozzles mounted on said spring-mass for directing a jet of fluid radially to provide an input to an oscillation registering mechanism.
Claim 4
Dependent Claim
84 words
The oscillator defined in claim 1, further comprising: a drum fixedly mounted on said base; said spring-mass system including a circular hub disposed coaxially to and enclosing said fixed drum and defining therein fluid port means communicating with said nozzles, and a torsion spring disposed coaxially with the axis of oscillation; and, said valve means comprising a ribbon roll valve disposed between said hub and said drum and which rolls with said hub to periodically release said puff of pressurized fluid to said nozzles.
Claim 5
Dependent Claim
53 words
The oscillator defined in claim 3, further comprising: a hollow cylindrical boss mounted coaxially on said hub for rotation in bearings mounted in said base; a fluid line fixed to said base and extending axially through the hollow center of said boss and connected at the other end to and supporting said drum.
Claim 6
Dependent Claim
112 words
The oscillator of claim 3, wherein: said torsion spring comprises an upper portion fixed at one end to the top of said hub and at the other end to a fixed support, and a lower, hollow portion connected at one end to the bottom of said hub and at the other end to said base; said drum includes a rigid support rod attached at one end to the center of said drum and extending through said hollow torsion spring to attachment to said base at the other end; and, said conduit means includes a fluid line communicating with said hollow torsion spring and through which pressurized fluid is supplied to said oscillator.
Claim 7
Dependent Claim
52 words
The oscillator of claim 3 wherein said ribbon roll valve comprises: a pair of closed loops of flexible material, both ends of which are disposed in juxtaposed spaced relation providing therebetween a gap for the escape of said puff of pressurized fluid when said gap is aligned with said fluid port means.
Claim 8
Dependent Claim
39 words
The oscillator defined in claim 1, further comprising: a second pair of fluid nozzles mounted diametrically opposed on said mass and directed parallel to the direction of oscillation and opposite to the direction of said first pair of nozzles.
Claim 9
Dependent Claim
73 words
The oscillator defined in claim 7, wherein said conduit means comprises: a fluidic interaction zone; a channel intersecting said interaction zone and extending parallel to the direction of oscillation to communicate with opposite lateral sides of said mass whereby an ambient draft is induced through said channel by reason of the oscillation of said mass; and, a pair of ducts bifurcating from said interaction zone and communicating with said first pair of nozzles.
Claim 10
Dependent Claim
79 words
The oscillator defined in claim 7, wherein said conduit means comprises: a fluidic interaction zone; a pair of ducts bifurcating from said interaction zone and communicating with said first pair of nozzles; whereby rotation of said mass will induce a draft through said ducts and across said interaction zone to induce said puff, when released, to follow said draft along one of said ducts to exit in a jet directed opposite to the direction of motion of said mass.
Claim 11
Dependent Claim
84 words
The oscillator defined in claim 7, further comprising: a drum fixedly mounted on said base; said spring-mass system including a circular hub disposed coaxially to and enclosing said fixed drum and defining therein fluid port means communicating with said nozzles, and a torsion spring disposed coaxially with the axis of oscillation; and said valve means comprising a ribbon roll valve disposed between said hub and said drum and which rolls with said hub to periodically release said puff of pressurized fluid to said nozzles.
Claim 12
Dependent Claim
53 words
The oscillator defined in claim 10, wherein said ribbon roll valve comprises: a pair of closed loops of flexible material, both ends of which are disposed in juxtaposed spaced relation providing therebetween a gap for the escape of said puff of pressurized fluid when said gap is aligned with said fluid port means.
Claim 13
Dependent Claim
73 words
The oscillator defined in claim 10 wherein said conduit means comprises: a fluidic interaction zone; a channel intersecting said interaction zone and extending parallel to the direction of oscillation to communicate with opposite lateral sides of said mass whereby an ambient draft is induced through said channel by reason of the oscillation of said mass; and, a pair of ducts bifurcating from said interaction zone and communicating with said first pair of nozzles.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |