Patent US6225447B1 successfully refreshed from Google Patents.
US3829781A
Expired / Lapsed
US
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Aircraft emergency warning system
Assignee: Pacific Communications Inc
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Filing: 1972-06-19
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Granted: 1974-08-13
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Expires: 1992-06-19
Abstract
Abstract An aircraft emergency warning system comprising a radio signal generator having an integral power source, such as a battery, and an antenna for sending said signal. The signal is initiated by a switch which operates manually or upon ''''G'''' forces being exerted thereon, such as those forces encountered in a crash of an aircraft in which the emergency system is implaced. The emergency system can be integrally tested by a ''''test means'''' in the form of the signal being ''''effectuated'''' and operating a test light. When the system is armed, a crash causes ''''G'''' forces during the crash to turn on the warning system through the switch. The switch comprises a relay which is closed by a first magnet. The first magnet has its forces normally shunted through an armature. Upon crash the armature is latched by a second magnet which holds it in place, causing said first magnet to close the relay which completes a circuit for issuing an emergency signal.
Inventors
- 👤 R Letson
- 👤 W Cormey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
B; B64; B64D; B64D45/00; G; G01; G01S; G01S5/00; G01S5/02; G01S5/0205; G01S5/0226; G01S5/0231; B64D2045/0065
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
121 words
An aircraft emergency radio signal system having an electrical power source means for generating and broadcasting a radio signal connected for operation by said electrical power source and, means to switch the radio signal means into an operative condition when G-forces have been encountered by the switching means above a pre-established level wherein the improvement is a switching means comprising: a first magnet; a movable armature; a relay actuated by said first magnet which is shunted when the switch is in the open position through said armature being in proximate relationship thereto until said armature is moved by the pre-established G-forces; and, a second magnet for latching said armature thereto upon the Gforces moving said armature into magnetically holding juxtaposition therewith.
Claim 2
Dependent Claim
121 words
An aircraft emergency radio signal system having an electrical power source means for generating and broadcasting a radio signal connected for operation by said electrical power source and, means to switch the radio signal means into an operative condition when G-forces have been encountered by the switching means above a pre-established level wherein the improvement is a switching means comprising: a first magnet; a movable armature; a relay actuated by said first magnet which is shunted when the switch is in the open position through said armature being in proximate relationship thereto until said armature is moved by the pre-established G-forces; and, a second magnet for latching said armature thereto upon the Gforces moving said armature into magnetically holding juxtaposition therewith.
Claim 3
Dependent Claim
27 words
The system as claimed in claim 1 further comprising: spring means for biasing said armature in proximate relationship to said first magnet until ''''G'''' forces are encountered.
Claim 4
Dependent Claim
24 words
The system as claimed in claim 2 further comprising: switching means to test the system by manually moving said armature from said first magnet.
Claim 5
Dependent Claim
28 words
The system as claimed in claim 3 further comprising: a light for emitting a visual indication of the radio signal when said switch is in a test mode.
Claim 6
Dependent Claim
71 words
A ''''G'''' switch for conducting the flow of electrical current when said switch is subjected to a generally pre-established gravity force thereon comprising: a reed relay; a magnet which actuates said reed relay; an armature for placement in juxtaposition to said magnet; and, a second magnet for latching said armature thereto away from said first magnet after a pre-established G-force has moved said armature in the direction of said second magnet.
Claim 7
Dependent Claim
71 words
A ''''G'''' switch for conducting the flow of electrical current when said switch is subjected to a generally pre-established gravity force thereon comprising: a reed relay; a magnet which actuates said reed relay; an armature for placement in juxtaposition to said magnet; and, a second magnet for latching said armature thereto away from said first magnet after a pre-established G-force has moved said armature in the direction of said second magnet.
Claim 8
Dependent Claim
48 words
The switch as claimed in claim 5 further comprising: spring biasing means for holding said armature in unlatched position of a suitable compressive strength to hold it in proximate relationship to said first magnet until a pre-established G-force causes said armature to be latched to said second magnet.
Claim 9
Dependent Claim
72 words
The switch as claimed in claim 6 wherein said shunt comprises: a shunt for shunting the magnetic forces of said second magnet in relation to the armature, adjustably located along said second magnet so that the latching effect of the magnetic forces of said second magnet on said armature can be adjusted by virtue of the shunt increasing or decreasing the amount of magnetic force of said second magnet on said amrature.
Claim 10
Dependent Claim
22 words
The switch as claimed in claim 7 further comprising: a means for moving and holding said amature away from said first magnet.
Claim 11
Dependent Claim
42 words
The switch as claimed in claim 8 further comprising: a stem; a knob attached to said stem; a cam surface on said stem of said switch which moves against a portion of the armature which forms a follower for said cam surface.
Claim 12
Dependent Claim
40 words
The switch as claimed in claim 9 in combination with a radio signal means comprising: a source of electrical power; and, radio signal producing means connected to said relay for operation by said power when said relay has been actuated.
Claim 13
Dependent Claim
50 words
The combination as claimed in claim 10 further comprising: a light connected to said radio signal means which can be actuated when said switch is turned to a position for causing said radio signal to emanate; and, means for connecting said relay to said light through the radio signal means.
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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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |