Patent US3760898A successfully refreshed from Google Patents.
US3760898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive anti-theft and safety device
Assignee: Individual
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Filing: 1971-09-16
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Granted: 1973-09-25
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Expires: 1991-09-16
Abstract
Abstract An anti-theft and safety device for vehicles and the like, said device comprising a normally closed solenoid-operated fuel valve connected to an SCR circuit which is adapted to be triggered through an ignition switch in the start position, thus preventing theft by by-passing the ignition switch. The device further includes an oil pressure or level responsive switch and an RC circuit which are effective to turn off the SCR in response to an adverse oil condition or related engine malfunction.
Inventors
- 👤 P Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:58
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/01; B60R25/04; B60R25/042
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
242 words
A device comprising valve means for controlling the flow of fuel to an engine and circuit means for energizing and deenergizing said valve means, said circuit means including a source of voltage, first switch means between said source of voltage and said valve means, and second switch means in series with said valve means and being enabled by said first switch means to energize said valve means to permit thP flow of fuel therethrough, said second switch means including a silicon controlled rectifier in series with said valve means, said First switch means being movable to a first position for connecting one side of said voltage source to said valve means and a second position for triggering said silicon controlled rectifier and maintaining said valve means connected to the voltage source, said valve means including electrical coil means in series with said silicon controlled rectifier and said first switch means when in either said first position or said second position, said circuit means including oil condition responsive switch means connecting one side of said coil means to ground for energization thereof when in a first position and effectively disconnecting said voltage source from the other side of said coil when in a second position thereby deenergizing said coil means, said circuit means including capacitive circuit means connected in parallel with said coil means for turning off said silicon controlled rectifier when said oil condition responsive switch means is in said second position.
Claim 2
Independent Claim
242 words
A device comprising valve means for controlling the flow of fuel to an engine and circuit means for energizing and deenergizing said valve means, said circuit means including a source of voltage, first switch means between said source of voltage and said valve means, and second switch means in series with said valve means and being enabled by said first switch means to energize said valve means to permit thP flow of fuel therethrough, said second switch means including a silicon controlled rectifier in series with said valve means, said First switch means being movable to a first position for connecting one side of said voltage source to said valve means and a second position for triggering said silicon controlled rectifier and maintaining said valve means connected to the voltage source, said valve means including electrical coil means in series with said silicon controlled rectifier and said first switch means when in either said first position or said second position, said circuit means including oil condition responsive switch means connecting one side of said coil means to ground for energization thereof when in a first position and effectively disconnecting said voltage source from the other side of said coil when in a second position thereby deenergizing said coil means, said circuit means including capacitive circuit means connected in parallel with said coil means for turning off said silicon controlled rectifier when said oil condition responsive switch means is in said second position.
Claim 3
Dependent Claim
116 words
An anti-theft and safety device for connection to an engine electrical ignition system having a source of voltage, an oil condition responsive switch and a multiposition ignition switch, said device comprising: an electrically operated fuel valve adapted to be inserted into the engine fuel supply line and including an electrical coil adapted to be connected at one end thereof to the ignition switch, a silicon controlled rectifier connected to the opposite end of said coil and having a gate lead adapted to be connected to the ignition switch for triggering of said silicon controlled rectifier, said silicon controlled rectifier and said coil being adapted to be connected to the oil condition responsive switch for grounding therethrough.
Claim 4
Dependent Claim
116 words
An anti-theft and safety device for connection to an engine electrical ignition system having a source of voltage, an oil condition responsive switch and a multiposition ignition switch, said device comprising: an electrically operated fuel valve adapted to be inserted into the engine fuel supply line and including an electrical coil adapted to be connected at one end thereof to the ignition switch, a silicon controlled rectifier connected to the opposite end of said coil and having a gate lead adapted to be connected to the ignition switch for triggering of said silicon controlled rectifier, said silicon controlled rectifier and said coil being adapted to be connected to the oil condition responsive switch for grounding therethrough.
Claim 5
Dependent Claim
113 words
An anti-theft and safety device for connection to an engine electrical ignition system having a source of voltage, an oil condition responsive switch and a multiposition ignition switch, said device comprising: an electrically operated fuel valve adapted to be inserted into the engine fuel supply line and including an electrical coil adapted to be connected at one end thereof to the ignition switch, a silicon controlled rectifier connected to the opposite end of said coil and having a gate lead adapted to be connected to the ignition switch for triggering of said silicon controlled rectifier, said device including a capacitive circuit in parallel with said coil for turning off said silicon controlled rectifier.
Claim 6
Dependent Claim
113 words
An anti-theft and safety device for connection to an engine electrical ignition system having a source of voltage, an oil condition responsive switch and a multiposition ignition switch, said device comprising: an electrically operated fuel valve adapted to be inserted into the engine fuel supply line and including an electrical coil adapted to be connected at one end thereof to the ignition switch, a silicon controlled rectifier connected to the opposite end of said coil and having a gate lead adapted to be connected to the ignition switch for triggering of said silicon controlled rectifier, said device including a capacitive circuit in parallel with said coil for turning off said silicon controlled rectifier.
Claim 7
Dependent Claim
29 words
The structure set forth in claim 3 wherein said silicon controlled rectifier and said coil are adapted to be connected to the oil condition responsive switch for grounding therethrough.
Claim 8
Dependent Claim
37 words
The structure set forth in claim 4 wherein said device includes electrical resistance means connected between said gate lead and the ignition switch for attenuating the voltage from the voltage source when triggering said silicon controlled rectifier.
Claim 9
Dependent Claim
180 words
A vehicle anti-theft and safety system comprising: a voltage source, oil condition responsive switch means for completing a circuit under predetermined vehicle malfunctions, electrical coil means for inhibiting operation of a component of the vehicle when said coil means is energized, ignition switch means for selectively serially connecting said oil condition responsive switch means and said coil means to a first side of said voltage source, said coil means including a coil connected in series at one end to said ignition switch means, and gated switch means for connecting the opposite end of said coil to the second side of said voltage source, said gated switch means including a gate lead connected to said ignition switch means, said ignition switch means including on and start positions whereby said ignition switch means connects said gate lead to said voltage source only when in said start position to enable said gated switch means and serially connects said oil condition responsive switch means and said one end of said coil to said voltage source when in both of said on and start positions.
Claim 10
Dependent Claim
180 words
A vehicle anti-theft and safety system comprising: a voltage source, oil condition responsive switch means for completing a circuit under predetermined vehicle malfunctions, electrical coil means for inhibiting operation of a component of the vehicle when said coil means is energized, ignition switch means for selectively serially connecting said oil condition responsive switch means and said coil means to a first side of said voltage source, said coil means including a coil connected in series at one end to said ignition switch means, and gated switch means for connecting the opposite end of said coil to the second side of said voltage source, said gated switch means including a gate lead connected to said ignition switch means, said ignition switch means including on and start positions whereby said ignition switch means connects said gate lead to said voltage source only when in said start position to enable said gated switch means and serially connects said oil condition responsive switch means and said one end of said coil to said voltage source when in both of said on and start positions.
Claim 11
Dependent Claim
32 words
The system set forth in cLaim 6 including capacitive circuit means in parallel with said coil for disabling said gated switch means when said oil condition responsive switch means senses a malfunction.
Claim 12
Dependent Claim
26 words
The system set forth in claim 7 wherein said gated switch means includes a silicon controlled rectifier serially connected to said opposite end of said coil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |