Abstract: An intrusion alarm system with an automatic exit control and a misset indicator which informs that someone has trespassed by opening a door during the resident's absence. This system comprises a sequential circuit which is enabled by mode selection by the resident at his/her going out and which stores the door's opening and closing signal produced as an output signal of a door open/closed detection circuit upon a second door opening, a misset alarm device which generates an alarm if the opening of the door is not detected within a predetermined time after the "Absent" mode is placed, and a timer circuit which is operated by the output signal of the sequential circuit and at the time-up to generate alarms. The sequential circuit can be cleared or disabled when the resident comes home and generation of an alarm is then prevented.

Abstract: A burglarproof device which can facilitate the activation of an alarm system and can provide lock-out protection. It uses a set of correct-signal generating reed switches and a set of incorrect-signal generating reed switches to activate the alarm signal, and the input of a correct signal within the preset lock-out time after receipt of an incorrect signal will not be able to open the door lock or disarm the alarm system.

Abstract: An intrusion detection system of the type employing a keypad utilizing the keys to conventionally enable a user to key in a secret code capable of arming or disarming the system. The present apparatus includes a hold-down feature whereby if any one of the plurality of keys on the keypad is depressed for a predetermined interval, the apparatus detects the predetermined timing interval and transmits an audible sound to the user indicating that the requisite timing interval has transpired. Upon receipt of the audible sound, as depending upon the test to be performed, the user is thus informed that the system will now commence the test procedure as defined by the selected key. Thus the system includes apparatus for detecting the requisite timing interval. Upon detection of the requisite timing interval a storage means is activated, which storage means is associated with the selected key.

Abstract: An alarm system (10) for detecting unauthorized intrusion into a vehicle and determining the location of such vehicle includes a vehicle alarm (11) and one or more networks (12, 13, 14) for receiving the output signal from vehicle alarm (11). Vehicle alarm (11) includes a transmitter (40) for broadcasting a low frequency modulated radio frequency alarm signal at the citizen band distress frequency and a control unit (25) for selectively activating the alarm upon a drop in the voltage magnitude of the vehicle power supply (27) induced by an unauthorized intrusion. Networks (12, 13, 14) respectively include citizen band radio detectors (15), mobile dedicated alarm detectors (16), and fixed dedicated alarm detectors (17) accompanied by a display unit (18).

Abstract: A building has at least one security guard post to control the secured building exits, each of which has an unlocking instrumentality, without forbidding their emergency use. When activating the unlocking instrument to open a secured exit, there is a transmission of information to the security guard post and an initiation of a delay during which the security guard can forbid the opening of the exit. The unlocking instrument can also visually indicate events at the exit. The apparatus has an electro-mechanical lock, a sensor which is sensitive to motion of the unlocking instrument, a control line linking each door to be controlled to the security guard post, and a central electronic processing unit. A surveillance circuit responds to the sensor. A security circuit frees the unlocking instrument when a fault is detected.

Abstract: A user friendly security apparatus and system for use in the home or small business. A logic architecture is provided which permits the monitoring of not only intrusion but also fire, special emergencies, low battery conditions or flooding utility power failure and the like. Positions to be secured with the system are monitored by small R. F. transmitters of restricted range as well as by hand held transmitters which are used for emergency conditions and the like. A transponder is provided for mounting within the home or business in the form of a console which responds to transmitted signals as well as to a silent hold-up switch fixed thereto to carry out automatic telephone dialing to a central security monitoring service. The transponder operates in an armed or idle operational mode and includes a test feature for use in the idle mode as well as a reset feature for that mode.

Abstract: The present invention relates to an alarm device for doors in vehicles which is located in a hollow rubber tube and gives alarm as the tube is compressed. The device can be adjusted to be sensitive by placing in one end of the tube a light transmitter and in the other end a light receiver producing a signal which changes according to the light intensity received by the receiver and by compensating slowly occurring changes in said light intensity so that the light intensity of the light transmitter in a corresponding manner is corrected.

Abstract: A theft warning system for use in a vehicle, which issues a warning to protect vehicle contents when a vehicle door is opened without use of a door key. The theft warning condition is set only when all doors are closed while all the door lock devices are locked. The theft warning system generates a theft warning signal when the final open door is closed and locked without use of a door key and one of the door lock devices subsequently is unlocked without a door key.

Abstract: A dual mode electronic intrusion or burglar alarm system for use with a door or window which can be opened and closed comprises a switch actuatable by the door or window, a control circuit, including time delay circuitry, operatively connected to the switch and responsive to switch actuation to operate in either of two modes, and an alarm connected to be operated by the control circuit. When the system is in operation and armed in a first mode, initial actuation of the switch in response to opening of the door or window causes the control circuit to actuate the alarm for a first predetermined interval of time, then to shut off the alarm and arm itself in a second mode wherein subsequent actuation of the switch in response to closing of the door or window causes the control circuit to again actuate the alarm for a second predetermined interval of time. The system can be reset for operation in the first mode either during the first interval of time, or at any time thereafter, i.e.

Abstract: An "Automatic Exit Delay" circuit of a burglar alarm is placed on Stand-By whenever a "first" door is opened and the burglar alarm automatically starts to work right after the "last" door is closed. At that moment of arming a "Quiet Quick Test" Network automatically tests the alarm for proper functioning and generates a short "beep" to indicate such as well as the armed state of the alarm system.

Abstract: An automatic bypass switch comprising an electronic switch circuit responsive to voltage signals generated by the delay circuit and armed status of an electronic alarm system. The output of the bypass switch is connected to one or more detection circuits so as to shunt or prevent activation when the control has been armed until the delay circuit has been activated. From this time until the panel has been disarmed and rearmed again, the controlled detection circuit(s) is active and not shunted.

Abstract: A fire alarm control system in which an electronic switch circuit is responsive to an increase input current signal generated by one or more fire detection devices. A local alarm is connected to the electronic switch circuit to indicate an alarm state. A delay timer circuit is connected to the electronic switch circuit and operated thereby to activate a remote alarm after a predetermined time delay. A manual two-position switch is movable to a silence position from its normal position within the time delay to disable the local and remote alarms and movable back to its normal position to cut off power to the detection devices and electronic switch means to unlatch the alarms. A further pair of manually operable switches are provided to instantaneously reactivate the disabled local and remote alarms when the two-position switch is in the normal position.

Abstract: In a central station alarm system the alarm sensors associated with a particular subscriber's premises are monitored by a local control unit associated with those premises and controllable by the subscriber. The local control unit automatically reminds the subscriber when he is supposed to close the premises and turn on the system. The local control unit allows the subscriber to change his expected closing time. The local control unit may also perform various other functions such as automatically cutting off power to low priority alarm sensors during a prolonged power failure, automatically cancelling any audible alarm indication silence commands when there are no alarms to silence, and automatically forming a bridge connection between the remote ends of two communication circuits when there is a break in either circuit.

Abstract: A multiple function alarm (10) for the security of an individual within a preselected area, the alarm (10) having substantially all its electrical components mounted to a board (12), includes a switch (14) for selecting the function the alarm is to perform; a smoke detector (16) for optically detecting the presence of smoke including a light source (72) for generating light and a light sensor (73) both mounted on the board (12); intrusion detector (15) for detecting an unauthorized intrusion into the selected area, a visual alarm (18) and audio alarm (19) for communicating to the individual the presence of a potential security threat; and a plate assembly (13) for housing switch (14), the intrusion detector (15) and the alarms (18, 19) in operative association with the electrical components mounted to the board (12).

Abstract: An electric indicator that includes an indicating light mounted in a small case containing electronic circuitry, a numerical keyboard, and a battery, the case being attached to a door or door frame, to show the returning user of the indicator whether or not the door has been opened since the indicator was last enabled by the user, typically by entering a secret sequence of numbers into the keyboard. An auxiliary input jack, for electrical connection to other doors and windows, is provided so that the indicator can indicate whether any of several doors and windows has been opened. An auxiliary output jack is provided for a remote indicating light, usually inserted into the peephole existing in many front doors so that the indicator light may be seen from the outside before opening the door. The same output jack may be used for triggering separate audible alarm devices. The indicator is easily adapted for use with drawers, bins, or windows if so desired.

Abstract: In a central station alarm system the alarm sensors associated with a particular subscriber's premises are monitored by a local control unit associated with those premises and controllable by the subscriber. The local control unit automatically reminds the subscriber when he is supposed to close the premises and turn on the system. The local control unit allows the subscriber to change his expected closing time. The local control unit may also perform various other functions such as automatically cutting off power to low priority alarm sensors during a prolonged power failure, automatically cancelling any audible alarm indication silence commands when there are no alarms to silence, and automatically forming a bridge connection between the remote ends of two communication circuits when there is a break in either circuit.

Abstract: A timing apparatus for holding a door open for a controlled period of time before releasing it for closure. The timing apparatus includes a switch operable to produce a switching signal. A first energizing control is coupled to the switch and is responsive to the switching signal for producing a first signal. An electromagnetic device is coupled to the first energizing control and is energizable in response to the first signal. A first timing circuit is coupled to the first energizing control and is responsive to the first signal to generate a first timing signal of predetermined duration and corresponding to the switching signal. The first energizing control is further responsive to the first timing signal thereby to remain in the state of providing the first signal for such predetermined duration. A second timing circuit is coupled to the first timing circuit and is responsive to the termination of the first timing signal to produce a second timing signal of second predetermined duration.

Abstract: An electronic sequential combination locking device comprising a main switch to which a timer circuit is connected. The timer circuit is activated by the main switch to provide a timer output signal after a predetermined time lapse. An electronic switch means is connected to receive the timer output signal. An alarm is connected to the electronic switch means and is operable by the presence of the timer output signal. A combination lock circuit having a plurality of manually actionable switches is operable in a predetermined sequence to activate a supply switch and disable the electronic switch. The supply switch provides a supply to an operable means.

Abstract: An alarm system comprises a blower driven by an electric motor, the blower being fitted to the premises to be protected and serving to blow air into the premises. With all doors and windows shut the blower supplies a steady flow of air, the flow rate depending on the nature of the blower and how fast air can leak out of the premises around doors and windows, through air vents etc. The current drawn by the motor is constant in these circumstances and is monitored. When entry is made to the premises, by opening a door or window, the air flow rate increases and the load on the motor changes. This is reflected in a change in the current drawn by the motor and the blower can blow air from the premises, air entering around doors and windows etc.

Abstract: An alarm device for doors having in series an electric supply, such as batteries, three switches and a relay. The relay is locked upon the simultaneous closing of the three switches and actuates an alarm circuit. The first and second switches are respectively closed and open when the door is closed and respectively open and closed when the door is fully open. The three switches are closed during the opening and closing of the door and when the door is ajar and the door bolt is retracted. The third switch is controlled by the bolt and is closed except when the bolt is retracted.

Abstract: A security device for protecting premises having three separate variable time delays. A first time delays allows a legitimate user of the device to enter the premises and de-activate the device before the alarm sounds. The second time delay permits a legitimate user to exit from the premises without sounding the alarm. The third time delay ensures that the alarm will sound for a minimum period once the loop has been opened by an intruder. The device has an integrated circuit and each of the time delays are achieved through the use of a resistor in combination with a capacitor. The device also has a supervisory loop and the alarm becomes activated when the loop has been opened.

Abstract: An intrusion detection system includes a vibration sensor, and a gate circuit operable to provide an output signal only after the vibration sensor produces a first signal, and thereafter a second, separate signal within a preassigned "sensing window" period. To accomplish this, a timer circuit initiated by the sensor determines a timing interval, and a delay circuit coupled to the timing circuit prevents switching of the gate circuit until preset delay time has elapsed. After the delayed time, if a second sensor output signal is received before expiration of the timing interval, the gate circuit switches and passes a signal through an integrated circuit amplifier stage, and a driver circuit to energize an output unit. The sensitivity of the vibration sensor can be adjusted. The integrated circuit stage includes circuitry for maintaining the alarm signal even if the system is switched to off after it goes into alarm.

Abstract: A self-contained pre-intrusion detection and alarm system for doors and other closures, the system including an rf oscillator circuit incorporating a tank circuit which includes an antenna. The system also includes a detection and processing circuit effective to detect and amplify a change in the voltage in the rf oscillator circuit caused by a change in the antenna to ground capacitance; an audio oscillator circuit; time delay circuitry connected between the detecting and processing circuit and the audio oscillator circuit and controlling the energization of the audio oscillator circuit; and an alarm electrically connected to and controlled by the audio oscillator circuit for alerting occupants of potential danger of intrusion and also deterring potential intruders from continuing their activities toward intrusion.

Abstract: A door-activated burglar alarm incorporates a firing capacitor that is charged by a battery during the quiescent state of the alarm. The firing capacitor will provide an additional current to fire a buzzer when the alarm is triggered, even if the battery is weak. (Less current is needed to maintain the buzzer, once it is fired). One embodiment provides exit and entry delays.

Abstract: An intrusion alarm system for use such as in homes including an ultrasonic motion detector having means for selectively actuating switch means for a light and a sound alarm. The circuit includes a transducer for emitting a beam of ultrasonic energy and a sensor for detecting the modulation of the ultrasonic energy by movement occurring in the beam. The sensor provides a signal in response to said modulation to turn-on an electric light, and to turn-on a sound alarm.

Abstract: An alarm system for use with a vehicle is disclosed herein and operates between two primary states, an alarm ready state and an owner-identification state, depending upon certain sequential events relating to the positions of the vehicle's normal entry ways and key actuated ignition. In order to activate the system, a vehicle entry signal is produced in response to the opening of any entry way into the vehicle, however, only during the period when this system is in its alarm ready state. The entry signal in turn initiates an alarm signal for activating an alarm but only after a delay sufficient to allow the owner to identify himself by placing the system in its owner-identification mode, thereby cancelling initiation of the alarm signal.

Abstract: An electronic security system has a plurality of remote sending units which transmit coded intrusion and other emergency signals to a central alarm station. The alarm station decodes the received signals and produces an appropriate warning from an alarm generator. Electronic alarm controls at the central station discriminate the intrusion signals from other emergency signals and may block or delay the intrusion signals to allow entry or exit from the protected area. Testing circuits are also included in the alarm controls to establish a test mode of operation in which sending units transmit intrusion signals, and receipt is indicated without actuating the alarm generator. During the test mode of operation, the alarm control still accepts priority alarm signals from other sending units and generates alarm warnings from the alarm generator.

Abstract: An intrusion alarm system utilizes an inertially responsive sensor preferably present as a pendulum actuated reed switch. Logic circuits provided within the system provide, an efficient pulsating alarm at dual frequencies optimized for human recognition. In both arrangements, a unique dual delay arrangement is provided, one delay commencing with the arming of the device to permit adequate time for the setting of a sensing switch. A second delay arrangement is provided at the option of the operator for purposes of delaying the activation of the alarm once the sensor switch has been tripped. This feature may be utilized to permit entrance through a door or the like upon which the unit is mounted wherein the device can be deactivated prior to assuming an alarm sounding condition.

Abstract: A security system which includes closed loop fire detection circuitry, having a continuous monitor of the pyrogenic sensors, closed loop intrusion detection circuitry, a multiple tone audible alarm generator, a coded keyboard digital electronic lock circuit, and a fail-safe alternating current, direct current power supply which includes a battery, battery charging circuit, and a system testing facility. The audible alarm circuitry includes a modulated tone frequency generator and a modulating circuit operable between a plurality of states in response to different alarm conditions. The fire and intrusion circuits include filter circuits to prevent spurious operation, and feedback latching circuits for generating continuous alarm signals in response to a breach of the system. The entire circuit is fabricated with solid state electronic components including micro-electronic circuitry.

Abstract: An antitheft system for vehicles in which an operator actuates a thumbwheel to select one predetermined numerical combination and actuates a push button switch to turn on the system. The operator also actuates the thumbwheel to select another predetermined numerical combination and actuates the push button switch to turn off the system. The actuation of the thumbwheel by an operator to a numerical combination other than one of the predetermined numerical combination results in the operation of an alarm. Disposed within the vehicle are mercury switches, which sense any movement of the vehicle, when the system is turned on. When a mercury switch senses any movement of the vehicle, such as movement caused by the towing of the vehicle or the jacking up of the vehicle, the change of state of the mercury switch initiates the operation of an alarm. Also, the opening of a hood, door or trunk will initiate the operation of an alarm when the system is turned on.

Abstract: A transmitter/receiver supplies echo signals to an amplifying circuit incorporating an attenuator, whereby the circuit has a variable amplification factor tending to compensate for reducing magnitude of the amplitudes of the echo signals with distance of detected objects from the transmitter/receiver. The area of detection is divided into alternate active and inactive zones radiating outwardly from the transmitter/receiver, the amplified echo signals emanating from objects in the active zones during a given operating cycle are integrated and the total output is compared with the corresponding total for the preceding cycle.

Abstract: An intrusion alarm system includes a microcomputer and keyboard for providing control functions for the alarm system with greater reliability and with greatly increased security as compared with prior art systems. The disclosed system provides a positive means for deactivating the alarm system only by authorized personnel by the use of a multi-digit code which must be correctly entered on the keyboard within a prescribed short period of time after entry into the protected zone. Upon entry into the protected zone, the system goes immediately into a preliminary alarm stage which, for example, may be the lighting of a floor lamp in the room. The person entering the premises then has thirty seconds to enter the correct code on the keyboard attached to the front panel of the alarm unit to deactivate the system.

Abstract: A control circuit utilizing: a counter which provides first and second output signals at spaced apart time intervals and delay means for stopping and starting the counter; and switch means having start and stop inputs and an output connected to the delay means of the counter. The switch means, being arranged to start the counter when the start input is energized, and being arranged to stop the counter when the stop input is energized. The stop input of the switch means being actuated by the first counter output signal.

Abstract: An automobile burglar alarm including a battery voltage level sensor to be connected to the positive terminal of the automobile battery for providing an output signal level indicating the battery voltage level and responsive to reduction in the automobile battery voltage when an automobile dome light or trunk light supplied by the battery is turned on to provide a changed output signal level which persists for a predetermined time period, indicative of the reduced battery voltage level, a normally non-conducting transistor connected in circuit with the automobile headlight and horn relays to a supply voltage source to energize the relays when the transistor conducts, a timer circuit connected to the transistor to supply a timed output signal for causing the transistor to conduct for a predetermined short conduction interval, and an operational amplifier coupled to the sensor and the timer circuit for supplying an amplified signal adequate to cause the timer circuit to produce the timed output signal.

Abstract: An alarm device is provided comprising a portable housing having an audio alarm positioned therein and a battery powered electronic circuit for activating the alarm. The circuit comprises a battery, an arming switch, a triggering switch, an audio alarm, and a latching circuit and oscillator circuit utilizing an integrated circuit therein. The circuit also includes a means for connecting auxiliary devices thereto and a means for coupling an AC adapter. A magnetically operated reed switch and a mechanically operated pull switch comprise the normally open triggering switch. The triggering switch also contains means for adapting any activator wired normally open to the triggering switch. The oscillator circuit drives the audio alarm whenever any of the triggering switches are closed and the latching circuit maintains the oscillator in an operating mode.

Abstract: An intrusion alarm system of a variety utilizing an inertially responsive sensor preferably present as a pendulum actuated reed switch. Logic circuits provided within the system provide, in one embodiment, an efficient pulsating alarm at dual frequencies optimized for human recognition. In another arrangement, a unique dual delay arrangement is provided, one delay commencing with the arming of the device to permit adequate time for the setting of a sensing switch. A second delay arrangement is provided at the option of the operator for purposes of delaying the activation of the alarm once the sensor switch has been tripped. This feature may be utilized to permit entrance through a door or the like upon which the unit is mounted wherein the device can be deactivated prior to assuming an alarm sounding condition. In each of the circuit embodiments, an arrangement is provided wherein, once tripped, the alarm will continue to sound for designated intervals even though turned "off".

Abstract: A property protection alarm system is disclosed for protecting property against unauthorized intrusion and the like. The alarm system includes a numeric key board and a code combination logic circuit for arming an alarm energization circuit in response to the proper entry of a predetermined numeric code in the numeric keyboard. This predetermined code must be entered within a given period of time determined by the code combination logic circuit. In addition, the numeric key associated with the last digit of the predetermined code must be depressed for a given period of time as also determined by the code combination logic circuit. An exit delay circuit is connected to the output of the code combination logic circuit for delaying the arming of the alarm energization circuit in order to permit an authorized operator to leave the property without energizing the alarm. The alarm energization circuit is connected to a sensing circuit for sensing any intrusion of the property.