Intruder detector and warning system

Claim 2

A transistorized intruder detection and warning system for vehicles of the type including an electrically energizable warning device, closable access doors and an electrical ignition circuit comprising: A. means mounting the system within a vehicle; B. a system energization circuit including, 1. a source of electrical potential, 2. an output circuit including a first normally open switch connected with said source of potential, 3. a switching circuit including a first solenoid interconnected with the ignition circuit adapted to close the first normally open switch when the ignition circuit is opened; C. a driver circuit adapted to electrically drive the warning device including a solid state multivibrator circuit connected with the warning device of the vehicle and adapted to be energized selectively to drive the warning device; D. a solid state control circuit connected between the driver circuit and the energization circuit adapted to be activated to complete an electrical circuit between the energization circuit and the driver circuit; E. a plurality of normally open door switches, each of which is electrically connected with the control circuit and operatively coupled with a door of the vehicle adapted to close in response to an opening of the door for effecting an activation of the control circuit when a door of the vehicle is open; F. a timing circuit electrically connected with the control circuit adapted to impose a selected time delay between the opening of a preselected door and the activation of the driver circuit; G. means including circuit means connected with the driver circuit for interrupting the energization of the warning device in respOnse to a closing of an open door; and H. means connected with the driver circuit for effecting a delay between the closing of an open door and the interruption of the energization of the warning device.

Claim 3

The system according to claim 1 further comprising: A. a disabling circuit including a toggle switch connected within the energization circuit between the source of electrical potential and the control circuit adapted to be manually opened for disabling the system energization circuit; and B. switch means connected with the ignition circuit adapted to positively inactivate the vehicle ignition circuit simultaneously with the activation of the control circuit.

Claim 4

an output circuit including a first normally open switch connected with said source of potential,

Claim 5

an output circuit including a first normally open switch connected with said source of potential,

Claim 6

The system according to claim 2 wherein the energization circuit further includes: A. a second normally open switch connected in series with the first normally open switch; B. a second solenoid adapted to be energized for closing said second normally open switch; and C. means connecting a preselected one of the normally open door switches of the set of normally open switches in series with said second solenoid adapted to complete a circuit from the first normally open switch through the second solenoid for energizing said second solenoid at the first opening of the preselected door subsequent to an opening of the ignition circuit.

Claim 7

a switching circuit including a first solenoid interconnected with the ignition circuit adapted to close the first normally open switch when the ignition circuit is opened; C. a driver circuit adapted to electrically drive the warning device including a solid state multivibrator circuit connected with the warning device of the vehicle and adapted to be energized selectively to drive the warning device; D. a solid state control circuit connected between the driver circuit and the energization circuit adapted to be activated to complete an electrical circuit between the energization circuit and the driver circuit; E. a plurality of normally open door switches, each of which is electrically connected with the control circuit and operatively coupled with a door of the vehicle adapted to close in response to an opening of the door for effecting an activation of the control circuit when a door of the vehicle is open; F. a timing circuit electrically connected with the control circuit adapted to impose a selected time delay between the opening of a preselected door and the activation of the driver circuit; G. means including circuit means connected with the driver circuit for interrupting the energization of the warning device in respOnse to a closing of an open door; and H. means connected with the driver circuit for effecting a delay between the closing of an open door and the interruption of the energization of the warning device.

Claim 8

a switching circuit including a first solenoid interconnected with the ignition circuit adapted to close the first normally open switch when the ignition circuit is opened; C. a driver circuit adapted to electrically drive the warning device including a solid state multivibrator circuit connected with the warning device of the vehicle and adapted to be energized selectively to drive the warning device; D. a solid state control circuit connected between the driver circuit and the energization circuit adapted to be activated to complete an electrical circuit between the energization circuit and the driver circuit; E. a plurality of normally open door switches, each of which is electrically connected with the control circuit and operatively coupled with a door of the vehicle adapted to close in response to an opening of the door for effecting an activation of the control circuit when a door of the vehicle is open; F. a timing circuit electrically connected with the control circuit adapted to impose a selected time delay between the opening of a preselected door and the activation of the driver circuit; G. means including circuit means connected with the driver circuit for interrupting the energization of the warning device in respOnse to a closing of an open door; and H. means connected with the driver circuit for effecting a delay between the closing of an open door and the interruption of the energization of the warning device.

Claim 9

The system according to claim 3 wherein the solid state control circuit includes: A. a pair of transistors including a first and a second operatively associated PNP transistor; B. means connecting the base of the first transistor of the pair with ground potential through at least one switch of said plurality of normally open door switches when a door of the vehicle is open, whereby the first transistor is caused to conduct an electrical current; C. transistor controlled switch means operatively coupled with the first transistor of said pair adapted to close in response to a current flow established through the first transistor; D. circuit means electrically connecting the emitter of the second transistor with the driver circuit and the base with ground potential through said transistor controlled switch means, whereby the second transistor is caused to conduct after the first transistor is caused to conduct; and E. a capacitor electrically connected with the base of the second transistor adapted to apply a forward biasing voltage to the base of the second transistor subsequent to the opening of the transistor controlled switch means, whereby the second transistor continues to conduct after the first transistor ceases to conduct, so that an electrical signal is applied for a determinable duration to the driver circuit after all doors are closed.

Claim 10

The system of claim 4 wherein said timing circuit includes: A. an SCR connected to ground; B. a capacitor of the preselected capacitance connected with the system energization circuit and the gate of the SCR, whereby the SCR is caused to be switched to a conductive state subsequent to the charging of the capacitor by the energization circuit; and C. means connecting the output of said SCR to the collector of the first transistor of the pair of PNP transistors, whereby a current flow may be established through the first transistors in the presence of a forward biasing signal applied to its base and in response to a pulse provided to the gate of said SCR by the system energization circuit.

Claim 11

An intruder detector and warning system for a vehicle having a multiplicity of doors comprising: A. a source of DC electrical energy; B. a vehicle ignition circuit connected with said source of energy; C. first switch means connected with the ignition circuit adapted to close in response to the opening of the ignition circuit; D. second switch means including a plurality of normally open switches coupled with the doors of the vehicle, each adapted to complete a circuit to ground in response to an opening of An associated door; E. third switch means comprising a circuit including an output terminal being operatively connected with the second switch means adapted to respond to a closing of the second switch means for completing an output circuit from the source of electrical energy to said output terminal; F. a time-delay circuit connected with the output circuit at said terminal adapted to be energized by an output signal directed from the source of energy through the output terminal; G. a detector including a circuit connected with the time-delay circuit adapted to be electrically energized in response to an output from the time-delay circuit; H. means connected with the detector circuit adapted to switch the detector circuit to an activated state in response to a closing of said second switch means, whereby said detector circuit is caused to provide a detector output signal; I. fourth switch means connected with the detector circuit adapted to provide an SCR gate signal in response to a detector output signal; J. means including an SCR connected with the fourth switch means adapted to respond to the SCR gate signal to switch the SCR to cause the SCR to provide an output signal; K. a solid state multivibrator circuit connected with the SCR adapted to be driven by the output signal provided thereby to establish a pulsating relay activating signal; L. a warning device relay circuit electrically connected with the multivibrator adapted to respond to the activating output signal; M. fifth switch means connected between the SCR and the multivibrator circuit adapted to respond to an absence of a detector output signal for thus opening the circuit between the SCR and the multivibrator in the absence of a detector output signal; N. delay means including a circuit having connected therein a capacitor adapted to delay the opening of the fifth switch means, whereby the multivibrator drives the relay circuit in the absence of a detector output signal for a determinable period of time; and O. means connected between the fourth and the fifth switch means adapted to prepare the fifth switch for closing when a detector output signal is provided by the detector circuit subsequent to an opening thereof.

Claim 12

An intruder detector and warning system for a vehicle having a multiplicity of doors comprising: A. a source of DC electrical energy; B. a vehicle ignition circuit connected with said source of energy; C. first switch means connected with the ignition circuit adapted to close in response to the opening of the ignition circuit; D. second switch means including a plurality of normally open switches coupled with the doors of the vehicle, each adapted to complete a circuit to ground in response to an opening of An associated door; E. third switch means comprising a circuit including an output terminal being operatively connected with the second switch means adapted to respond to a closing of the second switch means for completing an output circuit from the source of electrical energy to said output terminal; F. a time-delay circuit connected with the output circuit at said terminal adapted to be energized by an output signal directed from the source of energy through the output terminal; G. a detector including a circuit connected with the time-delay circuit adapted to be electrically energized in response to an output from the time-delay circuit; H. means connected with the detector circuit adapted to switch the detector circuit to an activated state in response to a closing of said second switch means, whereby said detector circuit is caused to provide a detector output signal; I. fourth switch means connected with the detector circuit adapted to provide an SCR gate signal in response to a detector output signal; J. means including an SCR connected with the fourth switch means adapted to respond to the SCR gate signal to switch the SCR to cause the SCR to provide an output signal; K. a solid state multivibrator circuit connected with the SCR adapted to be driven by the output signal provided thereby to establish a pulsating relay activating signal; L. a warning device relay circuit electrically connected with the multivibrator adapted to respond to the activating output signal; M. fifth switch means connected between the SCR and the multivibrator circuit adapted to respond to an absence of a detector output signal for thus opening the circuit between the SCR and the multivibrator in the absence of a detector output signal; N. delay means including a circuit having connected therein a capacitor adapted to delay the opening of the fifth switch means, whereby the multivibrator drives the relay circuit in the absence of a detector output signal for a determinable period of time; and O. means connected between the fourth and the fifth switch means adapted to prepare the fifth switch for closing when a detector output signal is provided by the detector circuit subsequent to an opening thereof.

Claim 13

The system of claim 6 wherein the detector includes a pair of interconnected solid state switches connected in a manner such that the first switch must be rendered conductive before the second switch can be rendered conductive.

Claim 14

They system of claim 7 further including an electrically driven solenoid and a normally open switch operatively coupled thereto and connected between a source of forward biasing potential and the base of the second solid state switch adapted to close when the first solid state switch is rendered conductive so that the second solid state switch is caused to conduct as it is forward biased.

Claim 15

The system of claim 6 wherein the fifth switch means includes an electrically energizable solenoid and a mechanically actuated switch coupled with the solenoid and adapted to be actuated thereby.

Claim 16

The system according to claim 6 wherein the fifth switch means comprises a solid state switching circuit including a plurality of interconnected solid state switching devices.

Claim 17

An intruder detection and warning system for use in a vehicle having a plurality of doors and a source of electrical energy comprising: A. an electrically activatable alarm; B. means including a control circuit coupled with the alarm adapted to be switched to an energized state for activating the alarm and to a set state preparatory to being switched to the energized state; C. means for switching said control circuit to the said set state in response to a first opening of a selected one of said doors; and D. means for switching said control circuit to said energized state in response to a opening of one of said doors, subsequent to said first opening, whereby said coNtrol circuit is switched to a set state in response to a first opening of one of said doors and to an energized state in response to a subsequent opening of one of said doors for thereby activating said alarm.

Claim 18

An intruder detection and warning system for use in a vehicle having a plurality of doors and a source of electrical energy comprising: A. an electrically activatable alarm; B. means including a control circuit coupled with the alarm adapted to be switched to an energized state for activating the alarm and to a set state preparatory to being switched to the energized state; C. means for switching said control circuit to the said set state in response to a first opening of a selected one of said doors; and D. means for switching said control circuit to said energized state in response to a opening of one of said doors, subsequent to said first opening, whereby said coNtrol circuit is switched to a set state in response to a first opening of one of said doors and to an energized state in response to a subsequent opening of one of said doors for thereby activating said alarm.

Claim 19

An intruder detection and warning system for use in a vehicle having a door, an ignition system, and a source of electrical energy comprising: A. an electrically activatable alarm; B. means including a control circuit adapted to be switched to an energized state for activating the alarm, and to a ''''set'''' state preparatory to being switched to the energized state; C. means for switching said control circuit to the set state, including, i. a door switch operatively associated with said door adapted to open when said door is closed and to close when said door is opened, ii. a switching circuit including an output terminal operatively associated with said source of electrical energy and said door switch adapted to respond to a first closing of the door switch to provide an output voltage at said output terminal, iii. means for applying said output voltage to said control circuit for switching the control circuit to said set state, and iv. a time-delay circuit coupled with said output terminal and said control circuit adapted to respond to said output voltage to initiate a predetermined delay between the opening of said door and the switching of said control circuit to said set state, whereby said control circuit is switched to said set state subsequent to a predetermined delay after the door switch is first closed; and D. a trigger means coupled with said door switch and said control circuit energizable in response to a second closing of said door switch for switching the control circuit from the set state to the energized state for activating the alarm in response to a second closing of said door switch.

Claim 20

An intruder detection and warning system for use in a vehicle having a door, an ignition system, and a source of electrical energy comprising: A. an electrically activatable alarm; B. means including a control circuit adapted to be switched to an energized state for activating the alarm, and to a ''''set'''' state preparatory to being switched to the energized state; C. means for switching said control circuit to the set state, including, i. a door switch operatively associated with said door adapted to open when said door is closed and to close when said door is opened, ii. a switching circuit including an output terminal operatively associated with said source of electrical energy and said door switch adapted to respond to a first closing of the door switch to provide an output voltage at said output terminal, iii. means for applying said output voltage to said control circuit for switching the control circuit to said set state, and iv. a time-delay circuit coupled with said output terminal and said control circuit adapted to respond to said output voltage to initiate a predetermined delay between the opening of said door and the switching of said control circuit to said set state, whereby said control circuit is switched to said set state subsequent to a predetermined delay after the door switch is first closed; and D. a trigger means coupled with said door switch and said control circuit energizable in response to a second closing of said door switch for switching the control circuit from the set state to the energized state for activating the alarm in response to a second closing of said door switch.

Claim 21

The system of claim 12 wherein said vehicle includes an additional door and an associated door switch operatively coupled with said trigger means adapted to close in response to an opening of the additional door for energizing said trigger circuit.

Claim 22

The system of claim 13 wherein said ignition system includes a bistable ignition circuit adapted to be switched between opened and closed conditions, and said switching circuit comprises a normally open circuit coupled with said ignition circuit and adapted to close as said ignition circuit is switched to an open condition.

Claim 23

The system of claim 14 further comprising means including an additional time-delay circuit coupled with said alarm and with the door switch for deactivating said alarm subsequent to an opening of said door switch.

Claim 24

The system of claim 13 wherein the vehicle is provided with a hood and an associated switch operatively coupled with said trigger means adapted to close in response to an opening of the hood for energizing said trigger means to achieve an activation of said alarm.

Claim 25

A transistorized intruder detection and warning system for a vehicle of the type including an electrically energizable warning device, closable access doors, a warning device and an electrical ignition circuit comprising: A. a system energization circuit including, i. a source of electrical potential, ii. an output circuit including a first normally open switch connected with said source of potential, and iii. a switching circuit including means interconnected with the ignition circuit adapted to close the first normally open switch when the ignition circuit is opened; B. an electrically energizable driver circuit connected with the warning device of the vehicle; C. a control circuit connected between the driver circuit and the energization circuit for completing an electrical circuit between the energization circuit and the driver circuit; D. a plurality of normally open door switches connected with the control circuit and operatively associated with the access doors of the vehicle adapted to be closEd in response to an opening of the associated doors for effecting an activation of the control circuit; E. a timing circuit electrically connected with the control circuit adapted to impose a selected time-delay between the opening of a preselected door and the activation of the driver circuit; F. means connected with the driver circuit for interrupting the energization of the warning device in response to a closing of an open door; and G. means connected with the driver circuit for effecting a delay between the closing of an open door and the interruption of the energization of the warning device.

Claim 26

A transistorized intruder detection and warning system for a vehicle of the type including an electrically energizable warning device, closable access doors, a warning device and an electrical ignition circuit comprising: A. a system energization circuit including, i. a source of electrical potential, ii. an output circuit including a first normally open switch connected with said source of potential, and iii. a switching circuit including means interconnected with the ignition circuit adapted to close the first normally open switch when the ignition circuit is opened; B. an electrically energizable driver circuit connected with the warning device of the vehicle; C. a control circuit connected between the driver circuit and the energization circuit for completing an electrical circuit between the energization circuit and the driver circuit; D. a plurality of normally open door switches connected with the control circuit and operatively associated with the access doors of the vehicle adapted to be closEd in response to an opening of the associated doors for effecting an activation of the control circuit; E. a timing circuit electrically connected with the control circuit adapted to impose a selected time-delay between the opening of a preselected door and the activation of the driver circuit; F. means connected with the driver circuit for interrupting the energization of the warning device in response to a closing of an open door; and G. means connected with the driver circuit for effecting a delay between the closing of an open door and the interruption of the energization of the warning device.