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US3882394A
Expired / Lapsed
US
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Airplane crash locating device
Assignee: AERO ELECTRONICS DEV CO Inc
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Filing: 1973-08-20
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Granted: 1975-05-06
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Expires: 1993-08-20
Abstract
Abstract An impact energized airplane crash locating device comprising an elongated cylindrical glass filled polycarbonate plastic housing surrounding a transmitter and power supply retained within the central portion of the housing accessable through threadedly attached end covers of the unit. One end cap is provided with manual and novel impact controlled switched selectively operable while the other end cap provides access to the transmitter. An antenna is selectively mounted on the outside of the housing or at a distance therefrom.
Inventors
- 👤 Charles A Koster
- 👤 Wayne E Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:41
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034; H04B1/38; H04B2001/3894
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
An airplane locating device comprising: an open ended cylinrical housing having an axially disposed bore, demountable closure caps one for attaching to each end of said housing, a radially disposed baffle in said bore to provide a transmitter compartment at one end of the housing and a battery compartment at the other end of the housing, a radiation antenna attached to the outer circumference of the housing at the transmitter compartment end thereof, switching means mounted in one of said caps for selectively connecting a battery placed in said battery compartment with a transmitter placed in said transmitter compartment, said switching means comprising a selector switch and an impact switch, said selector switch in one position directly connecting the battery in said battery compartment to the transmitter in said transmitter compartment and when in another position connecting the battery through said impact switch to the transmitter, said impact switch upon closure under given impact forces energizing the transmitter, and electrical means for opening said impact switch,
Claim 2
Dependent Claim
166 words
An airplane locating device comprising: an open ended cylinrical housing having an axially disposed bore, demountable closure caps one for attaching to each end of said housing, a radially disposed baffle in said bore to provide a transmitter compartment at one end of the housing and a battery compartment at the other end of the housing, a radiation antenna attached to the outer circumference of the housing at the transmitter compartment end thereof, switching means mounted in one of said caps for selectively connecting a battery placed in said battery compartment with a transmitter placed in said transmitter compartment, said switching means comprising a selector switch and an impact switch, said selector switch in one position directly connecting the battery in said battery compartment to the transmitter in said transmitter compartment and when in another position connecting the battery through said impact switch to the transmitter, said impact switch upon closure under given impact forces energizing the transmitter, and electrical means for opening said impact switch,
Claim 3
Dependent Claim
26 words
The airplane locating device set forth in claim 1 wherein: said impact switch is provided with both mechanical and electrical means for individually opening its contacts.
Claim 4
Dependent Claim
17 words
The airplane locating device set forth in claim 1 wherein: said electrical means comprises a bimetallic element.
Claim 5
Dependent Claim
19 words
The airplane locating device set forth in claim 1 wherein: said antenna is remotelly positioned relative to said housing.
Claim 6
Dependent Claim
26 words
The airplane locating device set forth in claim 1 wherein: said housing is formed from a glass impregnated polycarbonate plastic of high durability and impact strength.
Claim 7
Dependent Claim
25 words
The airplane locating device set forth in claim 1 wherein: said switching means is mounted in said cap on the battery end of said housing.
Claim 8
Dependent Claim
27 words
The airplane locating device set forth in claim 1 in further combination with: means for short circuiting said impact switch for test purposes for energizing said transmitter.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |