US3602661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion responsive sensor
Assignee: Saab AB
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Filing: 1969-12-05
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Granted: 1971-08-31
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Expires: 1989-12-05
Abstract
Abstract The immersion responsive sensor of an automatically inflatable life jacket comprises concentric inner and outer tubular electrodes, the outer one having water access apertures at zones spaced axially from the ends of the inner one. The outer one comprises part of a housing that encloses a battery. Seal means extend across the outer electrode in axially spaced relation to the inner one and have frustoconical inner surfaces that drain water toward the apertures.
Inventors
- 👤 Karl-Gosta Liedberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:51
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/24; B63B; B63B2209/00; B63B2209/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
230 words
Means responsive to immersion in water to complete a circuit through which an electrical device such as a squib igniter is energized from a battery to effect actuation of emergency equipment, said immersion responsive means comprising: A. an elongated substantially tubular outer member 1. having an end portion that comprises a battery chamber in which the battery is receivable and 2. having an intermediate portion between its ends that has an electrically conductive inner surface which provides one of a pair of electrodes for electrical connection by water, said intermediate portion being apertured in zones near its ends to provide for entry of water thereinto; B. sealing means including sealing wall members of electrically insulating material spanning said tubular member and sealed thereto all around it at the ends of said intermediate portion, axially outwardly adjacent to each of said apertured zones, one of said sealing wall members cooperating with said end portion of the tubular member in defining the battery chamber; and C. a rigid inner member, means whereby said rigid member is supported by one of said sealing wall members in substantially coaxial radially inwardly spaced relationship to the intermediate portion of the outer tubular member and which extends through a substantial portion of the length of said intermediate portion, said inner member having an electrically conductive outer surface which provides the other of said pair of electrodes.
Claim 2
Dependent Claim
230 words
Means responsive to immersion in water to complete a circuit through which an electrical device such as a squib igniter is energized from a battery to effect actuation of emergency equipment, said immersion responsive means comprising: A. an elongated substantially tubular outer member 1. having an end portion that comprises a battery chamber in which the battery is receivable and 2. having an intermediate portion between its ends that has an electrically conductive inner surface which provides one of a pair of electrodes for electrical connection by water, said intermediate portion being apertured in zones near its ends to provide for entry of water thereinto; B. sealing means including sealing wall members of electrically insulating material spanning said tubular member and sealed thereto all around it at the ends of said intermediate portion, axially outwardly adjacent to each of said apertured zones, one of said sealing wall members cooperating with said end portion of the tubular member in defining the battery chamber; and C. a rigid inner member, means whereby said rigid member is supported by one of said sealing wall members in substantially coaxial radially inwardly spaced relationship to the intermediate portion of the outer tubular member and which extends through a substantial portion of the length of said intermediate portion, said inner member having an electrically conductive outer surface which provides the other of said pair of electrodes.
Claim 3
Dependent Claim
169 words
having an intermediate portion between its ends that has an electrically conductive inner surface which provides one of a pair of electrodes for electrical connection by water, said intermediate portion being apertured in zones near its ends to provide for entry of water thereinto; B. sealing means including sealing wall members of electrically insulating material spanning said tubular member and sealed thereto all around it at the ends of said intermediate portion, axially outwardly adjacent to each of said apertured zones, one of said sealing wall members cooperating with said end portion of the tubular member in defining the battery chamber; and C. a rigid inner member, means whereby said rigid member is supported by one of said sealing wall members in substantially coaxial radially inwardly spaced relationship to the intermediate portion of the outer tubular member and which extends through a substantial portion of the length of said intermediate portion, said inner member having an electrically conductive outer surface which provides the other of said pair of electrodes.
Claim 4
Dependent Claim
169 words
having an intermediate portion between its ends that has an electrically conductive inner surface which provides one of a pair of electrodes for electrical connection by water, said intermediate portion being apertured in zones near its ends to provide for entry of water thereinto; B. sealing means including sealing wall members of electrically insulating material spanning said tubular member and sealed thereto all around it at the ends of said intermediate portion, axially outwardly adjacent to each of said apertured zones, one of said sealing wall members cooperating with said end portion of the tubular member in defining the battery chamber; and C. a rigid inner member, means whereby said rigid member is supported by one of said sealing wall members in substantially coaxial radially inwardly spaced relationship to the intermediate portion of the outer tubular member and which extends through a substantial portion of the length of said intermediate portion, said inner member having an electrically conductive outer surface which provides the other of said pair of electrodes.
Claim 5
Dependent Claim
55 words
The immersion responsive means of claim 1, further characterized by: each of said sealing wall members having an axially inner surface which is inclined laterally and axially outwardly from the axis of the outer tubular member, to encourage any water in said intermediate portion to drain out of the same through its apertured end zones.
Claim 6
Dependent Claim
49 words
The immersion responsive means of claim 1, further characterized by: the opposite end portion of the outer tubular member cooperating with the other sealing member to define another chamber for housing electrical instrumentalities for connection with the battery and with said inner and outer members and the electrical device.
Claim 7
Dependent Claim
92 words
The immersion responsive means of claim 3, wherein said inner member is tubular, further characterized by: A. said sealing means including a tubular electrical insulating element extending coaxially through said intermediate portion of the tubular outer member, within said inner member, from one to the other of the sealing wall members and in sealing relation with them; and B. an elongated electrical conductor extending through said insulating element and the wall members for connection at one end with one terminal of the battery and at its other end with said electrical instrumentalities.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |