Patent Abstract:
A system for tracking as lost child a receiver attached to the coupled to a small child. The system comprises a transmitter carried by the parent. A small receiver and activator is attached to the child. When the parent activates the transmitter, the receiver is activated and buzzer or beeper is set off.

Full Description:
CLAIM OF PRIORITY  
       [0001]     This application claims priority to provisional application No. 60/569,520, filed on May 6, 2004, entitled “Remote Child Locator”, which is incorporated by reference herein in its entirety. 
     
    
     FIELD OF THE INVENTION  
       [0002]     The present invention is directed to the field of child protection. In particular, the present invention is directed to field of electronic child protection.  
       BACKGROUND OF THE INVENTION  
       [0003]     In the United States each year, thousands of children are abducted or lost at public venues. The safety and welfare of children takes the utmost priority in the lives of most people. The public have been turning to technology more and more to protect children and to prevent their abduction, injury and harm. Such technological means have included both audio and video monitors, alarm systems and the like.  
         [0004]     The risk of abduction is one of the greatest risks to parents and/or child care providers. While technology exists for protection of automobiles against similar threats such as car jacking and theft, this technology has not been used to protect children against similar threats. Many children become lost and/or abducted while returning from school, playing at a friend&#39;s house, while engaged in extended outdoor activities such as hiking or camping or while at malls and the like.  
         [0005]     The prior art includes security devices in which a lost or abducted child can be located by using a radio receiver that monitors the signal transmitted by a matching transmitter in possession of the lost or abducted child. U.S. Pat. No. 6,593,851 discloses a two-way, parent-child communication system includes a parent unit and at least one child unit. The parent and child units are capable of both sending and receiving signals to and from the corresponding unit to cause any number of alerts or messages to be communicated to the parent, child and/or guardian. Each unit may include a number of different alert mechanisms, including an audible alert, a visual alert, a vibratory alert or voice messages.  
         [0006]     U.S. Pat. No. 6,243,039 discloses a system that tracks the current and historical locations of a GPS locator device carried by a person provides widely available access to data referencing these locations, so that a parent can easily and frequently monitor the location of a child. Monitoring of a child&#39;s location may be conducted via a Web site, which provides graphical maps of location data, or via calling into a call center. The present invention also provides a means for a parent to trigger the automatic transmission of the device&#39;s location, via a Web site or call placed to a call center agent or a VRU. The present invention also provides a process of auto-notification of a device&#39;s movement that exceeds a pre-specified threshold. The present invention also includes a capability to function as a proximity alert device.  
         [0007]     U.S. Pat. No. 6,127,931 discloses a device for monitoring the movement of a person including a homing unit and a base unit. The homing unit includes a device for generating a homing signal and a transmitter for transmitting the homing signal at predetermined intervals. The base unit includes a receiver for receiving the homing signal, a processor for processing the homing signal to determine whether the homing unit is within a predetermined distance from the base unit and generating an alarm signal upon determining the homing unit is at a distance from the base unit greater than the predetermined distance. An alarm is provided on the base unit for alerting a user that the homing unit has moved a distance greater than the predetermined distance from the base unit upon receipt of the alarm signal from the processor. The alarm is at least one of an audible alarm, a visible alarm and a vibratory alarm. At least one of the base unit and homing unit includes a device for adjusting the predetermined distance. The processor determines a time between receipt of sequentially transmitted homing signals to determine the distance between the base unit and homing unit. The base unit further includes a display for displaying the distance between the base unit and homing unit and a direction to the homing unit from the base unit.  
         [0008]     U.S. Pat. No. 6,278,370 discloses a child locating and tracking apparatus which provides for the location of a child that is lost, abducted or in general danger to be quickly located is disclosed. The apparatus uses a small transmitter that is always carried by the child and as such, is always present when danger arises. The transmitter is easily disguised and hidden in the child&#39;s clothing or personal adornments such as shoes, coats, watches, earrings, bracelets, rings and the like. The apparatus uses a system of world wide receivers such as those provided by local cellular telephone towers or by low earth orbiting satellites used for low power communication. When a child is lost or in danger, the child simply activates the transmitter which sends a signal to a central reporting station or stations where trained personnel will contact the respective parents and/or care givers to determine if the child could possibly be in danger. If an affirmative decision is reached, the monitoring station personnel will then assist the local law enforcement officials in the respective area anywhere in the world where the alarm was received in locating the child and removing the child from harm&#39;s path.  
         [0009]     U.S. Pat. No. 5,689,240 shows a system that transmits and receives signals comprising a master unit and a remote unit, wherein a separation distance between the master unit and remote unit is continuously monitored and an alarm is activated on the master unit when no signal is received from the remote unit for at least a time longer than a preset interval. If the separation distance between the master and remote unit is exceeded for a time longer than a preset time interval, the remote unit activates an alarm attached to the remote unit. The master unit may also be used to activate manually the remote unit&#39;s alarm. A pin or key arrangement is provided that ensures that the remote unit is not deactivated without interfacing with the master unit.  
         [0010]     U.S. Pat. No. 6,486,777 to Clark has an issue date of Nov. 26, 2002. This invention is directed to an apparatus and method for an operator to monitor the whereabouts of a subject, the apparatus comprising a portable remote unit connected to the subject, the remote unit including a remote unit power supply, a radio transmitter for sending a substantially constant remote unit radio signal, a radio receiver for receiving a base unit radio signal, a remote unit alarm, and a dye pack for releasing dye substantially responsive to submersion of the remote unit in water. The apparatus also includes a base unit in radio communication with the remote unit for enabling the operator to monitor the whereabouts of the remote unit, the base unit including a base unit power supply, a radio transmitter for sending the base unit radio signal, a radio receiver for receiving the substantially continuous remote unit radio signal, a distance estimator for substantially estimating the distance between the base unit and the remote unit, a base unit alarm responsive to the remote unit radio signal so that the base unit alarm is activated when the remote unit radio signal is altered, and a direction finding function for generally finding the direction from which the remote unit signal originates, relative to remote unit radio signal strength.  
         [0011]     U.S. Pat. No. 6,078,260 discloses a system for monitoring the proximity and location of a child by a parent includes two transceiver units which communicate wirelessly. The child unit will transmit a signal to the parent unit so that the parent unit can determined the proximity of the child unit and its direction. A safe zone may be set by controls on the parent unit. When the child unit moves beyond the safe zone, the parent unit will generate an alert.  
         [0012]     U.S. Pat. No. 6,326,891 shows compact warning device for preventing child from being lost comprises a high frequency distance-adjustable host transceiver and a plurality of slave transceivers wherein the high frequency host transceiver is carried by the parents and a high frequency slave transceiver is secured on a child, and the host and the slave transceivers can proceed bidirectional page or response with its counterpart. When one of the slave transceivers departs from the host transceiver beyond a preset security range, both the host and the slave transceiver will alarm to warn the child and the parents in order to prevent the child from being lost. Moreover, as this invention is capable of adjusting security range in multiple stages, it can fit various circumstantial conditions.  
         [0013]     While the prior art discloses a number of systems directed to monitoring small children and the like, it is an object of the present invention to provide a system whereby a lost child or pet can be rapidly located by means of an electronic transmitter and receiver.  
         [0014]     It is a further object of the present invention to provide a system whereby a transmitter can create an audible sound for the location of a lost child.  
         [0015]     It is a further object of the present invention to provide a signal which can be heard by individuals proximate to the child.  
         [0016]     It is a factor object of the invention to provide a device having a proximity sansor.  
         [0017]     These and other objects of the present invention will become apparent from the detailed description and claims which follow.  
       SUMMARY OF THE INVENTION  
       [0018]     In accordance with the invention, a child locator apparatus comprising: a receiver inserted with in an object held proximate to child and having a sound activator; a transmitter held by a parent and having an activating button to trigger an alert on the receiver which activates the sound activator.  
         [0019]     In a further embodiment, the invention is a child locator apparatus comprising: a reciever inserted with in a child&#39;s toy affixed to the child&#39;s person; a transmitter held by a parent and having an activating button to trigger an alert on the receiver; and a proximity sensor which automatically activates the alert when the receiver is a predetermined distance from the transmitter.  
         [0020]     In yet a further embodiment, the invention is a child locator apparatus comprising: a reciever inserted with in a child&#39;s toy affixed to the child&#39;s person; a transmitter held by a parent and having an activating button to trigger an alert on the receiver; and 
        a proximity sensor with a distance setting ability which automatically activates the alert when the receiver is a predetermined distance from the transmitter.        
 
         [0022]     In still a further embodiment, the invention is a child locator apparatus comprising: a reciever inserted with in a child&#39;s toy affixed to the child&#39;s person; a battery powered transmitter held by a parent and having an activating button to trigger an alert on the receiver; and a proximity sensor which automatically activates the alert when the receiver is a predetermined distance from the transmitter. 
     
    
     BRIEF DESCRIPTION OF THE FIGURES  
       [0023]      FIG. 1  is a perspective view of the child alert system of the present invention.  
         [0024]      FIG. 2  discloses the transmitter module of the present invention.  
         [0025]      FIG. 3  is a block diagram of the receiver module of the present invention.  
         [0026]      FIGS. 4 and 5  are block diagrams of a further embodiment which includes a proximity sensor. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0027]     The present invention is a remote child locator device which will be sound audible device for locating lost or wandering children for distances up to two hundred feet and may further be adapted to include pets. A critical feature of the present invention is that the receiver can take the form of a baby toy, ball, doll, or tiny car. As such, the receiver is inconspicuous and does not attract attention. In one embodiment of the invention, comprises a pair of sunglasses in which the receiver/transmitter is being used in the head support or ear piece. While the invention is being described in the context of a system in which the receiver is attached to the child and the transmitter to the parent, it will be readilly apparent that this can be reversed.  
         [0028]     The invention  10  comprises two basic components; a receiving/sound emitting device or module  12  and a transmitter module  14 . The receiver/noise emitting device  12  will be contained within or on one of various common child associated items such as a small soccer ball, doll or toy. The device will be an effective, non-intrusive and low cost solution for helping parents find that wandering child that decides to play hide and seek amongst clothing displays and helps to reduce a potential kidnapper preying on a lost child.  
         [0029]     The invention is now more specifically described as follows. Referring now to  FIG. 1 , a perspective view of a child locating apparatus  10  is disclosed. As noted, the receiving/sound module  12  is shown within a child&#39;s adornment such as a toy, doll or trinket  20 . The adornment  20  may be attached to the child by means of a retaining means  25 , such as a chain or, alternatively, a zipper, fabric, buttons, snaps, clasps, lace or the like. It is important that the retaining means  25  holds the adornment  20  with the associated receiver module  12  in close contact with the child&#39;s body to prevent loss or removal. As noted, the adornment can be disguised as a pair of sunglasses.  
         [0030]     The adult or parent typically holds the transmitter device  14  which may be associated with a small hand held device of the size and shape typically associated with automatic car door openers as shown in  FIG. 1 . The overall size of the transmitting module  14  is preferably two to three inches in length by approximately one inch in width. The transmitting module  14  has an activating button  18  and an on/off switch  22 . The shape of the receiver by contrast is primarily dictated by the physical shape of the ornament  20  (as shown in  FIG. 1 ).  
         [0031]     The module further includes a power supply  23  and voltage regulator  25 . The overall enclosure of the transmitting module  14  may, in one embodiment, comprise injection molded plastic with appropriate seals to allow its use under wet or submerged conditions. As noted, the transmitting module may be part of a key chain. The system further includes a time delay module  32 .  
         [0032]     The transmitting module  14  further includes a battery level indication light  30 . The battery level indication light  30  will illuminate when less than a day&#39;s usable energy remains in the internal battery. The battery level indication light  30  should be observed daily by examining the transmitting module  14 .  
         [0033]     In operation, the parent or adult holds and mantains the transmitter. By depressing the activation button for a length of time greater than the pre-set time delay, an HF signal is transmitted via HF transmitter  33  which provides an output signal via antenna  34 . The antenna  34  is envisioned to be of a loop type that may be embedded in the perimeter of the transmitting module  14  (as shown in  FIG. 2 ), though it may be seen by those familiar in the art that other types such as microwave, dipole, multiple array and other type antennas will work equally as well and is not intended to be a limiting factor.  
         [0034]     The activating button  18  provides an input to the radio frequency transmitter  33  through the form of a normally open activation switch. As noted, a time delay activation button  18  provides an input to a time delay module  32  through the form of a normally closed push-button switch. The time delay is intended to prevent inadvertent activation. The time delay module  32  is a simple, commonly known time delay circuit that accepts an input signal, and after a predetermined time delay, passes the input signal onto the HF transmitter. The time delay interval is envisioned to be on the order of five seconds.  
         [0035]     The battery provides input power to a voltage regulator  25  as shown. In the event of low power output from the battery, an electrical signal is applied to the battery level indication light  30 . The internal parameters of the voltage regulator module  25  are such that there is at least 24 hours of advance warning that the battery  23  is depleted of power before the battery ceases to function. Output power from the voltage regulator module is applied to the radio frequency transmitter  33  and to an identification module  37 . The critical identification module  37  is set uniquely for every child locating and tracking apparatus  10  manufactured and posses a unique digital binary signature. This signature is applied to the radio frequency transmitter  33  through a digital signal path. All components envisioned to be of the microminiature nature and perhaps combined by use of Very Large Scale Integration or future electrical assembly method still under development.  
         [0036]     The receiver module  12  includes an on/off switch  40 , battery  42 , and low battery light  44 . The system also includes an HF receiver  46  and corresponding ID module  48  which matches the ID module  37  of the transmitter. An antenna is included as well. The receiver antenna  52  is similarly envisioned to be of a loop type that may also be embedded in the perimeter of the receiving module  12 . Other types such as microwave, dipole, multiple array and other type antennas will work equally as well and is not intended to be a limiting factor.  
         [0037]     In operation, activation of the transmitting module  14 , sends a radio frequency signal as shown in  FIG. 1  to the receiver. Upon activation by the transmitter  14 , a loud beep or horn element is activated via an audio generator  49  and speaker  50 .  
         [0038]     A further embodiment of the invention is now shown in  FIGS. 4 and 5 . In this embodiment the invention includes a proximity sensor  54 . The proximity sensor  54  is designed to send an electronic signal when a child is beyond a certain distance from the transmitter. The sensor can be set so as to trigger the signal at varying distances e.g., 25, 50, 100 feet.  
         [0039]     The present invention has been described with reference to the enclosed preferred emboidment. It is to be appreciated that the other emboidments fulfill the spirit and scope of the present invention and that the true nature and scope of the invention&#39;s do be determined with response to the claims appended hereto.

Technology Classification (CPC): 6