US3586979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Craft position indicating apparatus
Assignee: Individual
•
Filing: 1968-11-06
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Granted: 1971-06-22
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Expires: 1988-11-06
Abstract
Abstract Apparatus for indicating the position of a craft that has crashed and including a main electrical circuit with a battery and a normally inoperative radio signal transmitter therein with switching means connected in this circuit operable to cause the transmitter to transmit radio signals, and control means in the form of a fragile electrical conductor or a fragile tube containing fluid under pressure, to be extended throughout the craft where the control means will be interrupted if the craft crashes. The control means is connected to the switching means to operate the latter when the control means is interrupted as a result of the crash.
Inventors
- 👤 Harold R Hine
- 👤 Edward F Dawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:56
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
101 words
Apparatus for indicating the position of a craft that has crashed, comprising a main electrical circuit including a battery and a radio signal transmitter in series, said transmitter normally being inoperative in the circuit, switching means connected in said circuit operable to cause the transmitter to transmit radio signals, and fragile control means to be mounted on the craft and extending over a large area thereof where said control means will be ruptured if the craft crashes, said control means being connected to said switching means and adapted to operate said switching means solely by the rupture of the control means.
Claim 2
Dependent Claim
101 words
Apparatus for indicating the position of a craft that has crashed, comprising a main electrical circuit including a battery and a radio signal transmitter in series, said transmitter normally being inoperative in the circuit, switching means connected in said circuit operable to cause the transmitter to transmit radio signals, and fragile control means to be mounted on the craft and extending over a large area thereof where said control means will be ruptured if the craft crashes, said control means being connected to said switching means and adapted to operate said switching means solely by the rupture of the control means.
Claim 3
Dependent Claim
36 words
Craft-indicating apparatus as claimed in claim 1 in which said control means comprises a fragile electrical conductor which will break if a part of the craft along which said conductor extends is subjected to extraordinary force.
Claim 4
Dependent Claim
22 words
Craft-indicating apparatus as claimed in claim 1 in which said switching means comprises a silicon-controlled rectifier normally keeping the main circuit open.
Claim 5
Dependent Claim
95 words
Craft-indicating apparatus as claimed in claim 1 in which said switching means comprises a silicon-controlled rectifier normally keeping the main circuit open, the anode and the cathode of said SCR being connected in the main circuit, and a gate circuit connecting the gate of the SCR through a biasing resistor to the positive terminal of said battery, said control means being connected to said gate circuit so that when said control means is interrupted a positive charge is fed to said gate, thereby allowing current to flow in said main circuit to operate the transmitter.
Claim 6
Dependent Claim
75 words
Craft-indicating apparatus as claimed in claim 4 in which said control means comprises a fragile electrical conductor which will break if a part of the craft along which said conductor extends is subjected to extraordinary force, said conductor connecting said gate to the negative terminal of the battery so that when said conductor breaks a positive change is fed to said gate, thereby allowing current to flow in said main circuit to operate the transmitter.
Claim 7
Dependent Claim
15 words
Craft-indicating apparatus as claimed in claim 5 in which said conductor includes a resistance therein.
Claim 8
Dependent Claim
22 words
Craft-indicating apparatus as claimed in claim 5 including a condenser operatively connected to said gate and the negative terminal of the battery.
Claim 9
Dependent Claim
80 words
Craft-indicating apparatus as claimed in claim 4 in which said control means comprises a fluid-operated switch operable to cause said SCR to conduct, a fragile tube connected to said switch and which will break if a part of the craft along which said tube extends is subjected to extraordinary force, and a fluid in the tube under pressure, whereby breakage of said tube operates the fluid-operated switch to allow current to flow in said main circuit to operate the transmitter.
Claim 10
Dependent Claim
89 words
Craft-indicating apparatus as claimed in claim 4 in which said control means comprises a normally open fluid-operated switch in said gate circuit, a fragile tube connected to said switch and which will beak if a part of the craft along which said tube extends is subjected to extraordinary force, and a fluid in the tube under pressure, whereby breakage of said tube closes said switch to cause a positive charge to be fed to said gate, thereby allowing current to flow in said main circuit to operate the transmitter.
Claim 11
Dependent Claim
64 words
Craft-indicating apparatus as claimed in claim 1 in which said control means comprises a switch in the main circuit, a relay normally keeping said switch open, a battery in circuit with said relay, a fragile means extending throughout the craft and normally controlling the relay to keep said switch open, said fragile means on being disrupted causing the relay to operate to close switch.
Claim 12
Dependent Claim
49 words
Craft-indicating apparatus as claimed in claim 10 in which said fragile means comprises a fragile electrical conductor extending throughout the craft and in series with said battery and relay and which will break if a part of the craft along which said conductor extends is subjected to extraordinary force.
Claim 13
Dependent Claim
74 words
Craft-indicating apparatus as claimed in claim 10 including a fluid-operated switch in series with said battery and relay, and in which said fragile means comprises a fragile tube extending throughout the craft and connected to said switch and which will break if a part of the craft along which said tube extends is subjected to extraordinary force, and a fluid in the tube under pressure, whereby breakage of said tube operates the fluid-operated switch.
Claim 14
Dependent Claim
133 words
Craft-indicating apparatus as claimed in claim 1 in which said switching means comprises a silicon-controlled rectifier normally keeping the main circuit open, the anode and the cathode of said SCR being connected to the main circuit, and a gate circuit connecting the gate of the SCR through a biasing resistor to the positive terminal of said battery, and said control means comprising a fluid-operated switch operable to cause said SCR to conduct, a fragile container connnected by a tube to said switch and which will break if the part of the craft on which the container is mounted is subjected to extraordinary force, and a fluid in the container under pressure, whereby breakage of the container operates the fluid-operated switch to allow current to flow in said main circuit to operate the transmitter.
Claim 15
Dependent Claim
55 words
Craft-indicating apparatus as claimed in claim 1 in which said control means comprises a fluid-operated switch in the main circuit in series with said battery and transmitter, and a fluid under pressure in said fragile means, said fragile means being operatively connected to said switch, whereby breakage of said fragile means operates said fluid-operated switch.
Claim 16
Dependent Claim
32 words
Craft-indicating apparatus as claimed in claim 14 in which said fragile means comprises a fragile tube extending throughout the craft and containing said fluid under pressure and operatively connected to said switch.
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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |