US3976270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of surface ice accretion
Assignee: Australian Government
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Filing: 1975-07-22
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Granted: 1976-08-24
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Expires: 1995-07-22
Abstract
Abstract This specification discloses an ice accretion detector for aircraft comprising a sensing hole or port formed in part of the aircraft structure where icing is known to occur and connected to the key control port of a OR/NOR fluidic key and an air supply supplying air under pressure to the supply port of the key while a pneumatic indicator is connected to the output port of the key. When the sensing hole is closed by the formation of ice the fluidic key is switched into its other state and the pneumatic indicator senses this change and indicates the formation of ice.
Inventors
- 👤 Brian George Catchpole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:35
CPC Classifications
B; B64; B64D; B64D15/00; B64D15/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
76 words
An ice detector for use on an aircraft comprising a sensing port adapted to be located in a position where ice accretion is known to occur, means for passing fluid under pressure out through said port, means for sensing an increase in the pressure of the fluid signifying that the port is blocked by ice, and ice accretion indicator means adapted to be positioned inside the aircraft and activated by the sensing of said pressure increase.
Claim 2
Dependent Claim
76 words
An ice detector for use on an aircraft comprising a sensing port adapted to be located in a position where ice accretion is known to occur, means for passing fluid under pressure out through said port, means for sensing an increase in the pressure of the fluid signifying that the port is blocked by ice, and ice accretion indicator means adapted to be positioned inside the aircraft and activated by the sensing of said pressure increase.
Claim 3
Dependent Claim
28 words
The detector of claim 1, further comprising means for controlling the flow rate of the fluid below a rate at which de-icing effects occur in the sensing port.
Claim 4
Dependent Claim
10 words
The detector of claim 2, wherein the fluid is air.
Claim 5
Dependent Claim
125 words
An ice detector for use on an aircraft comprising a sensing port adapted to be located in a position where ice accretion is known to occur, a fluidic relay including a supply port, a control port, and an output port, said sensing port being connected to said control port, said supply port being adapted to be connected to a supply of fluid under pressure, said output port being connected to an indicator, said relay being in one state when said sensing and control ports are open, indicating no ice formation, and being in another state when said sensing and control ports are blocked, indicating ice formation, said indicator being actuated by the change from said one state to said another state to indicate ice formation.
Claim 6
Dependent Claim
125 words
An ice detector for use on an aircraft comprising a sensing port adapted to be located in a position where ice accretion is known to occur, a fluidic relay including a supply port, a control port, and an output port, said sensing port being connected to said control port, said supply port being adapted to be connected to a supply of fluid under pressure, said output port being connected to an indicator, said relay being in one state when said sensing and control ports are open, indicating no ice formation, and being in another state when said sensing and control ports are blocked, indicating ice formation, said indicator being actuated by the change from said one state to said another state to indicate ice formation.
Claim 7
Dependent Claim
12 words
The detector of claim 4, wherein said relay comprises an OR/NOR relay.
References Cited (Backward Citations)
US2755456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |