Abstract:
A communication device is provided which is intended to aid farm workers in the coordination of harvesting and hauling vehicles in the field during crop harvesting operations. This communication device consists of a transmitter and receiver which are mounted at convenient points within the harvesting vehicle and produce hauling truck respectively. The receiver contains four lighted directional arrows representing directional changes of forwards, backwards, left, and right. The transmitter contains four buttons that correspond in location and function to the directional arrows on the receiver. Thus, when a button on the transmitter is depressed by the harvester operator, the corresponding directional arrow on the receiver will light up signaling the truck driver to make a change in the position of his truck relative to the harvester.

Description:
BACKGROUND OF THE INVENTION 
   The present invention relates to an improvement in the methods used to control the position of a truck or grain cart in relation to a harvesting vehicle while the two are traveling next to one another while traveling along a parallel line. More specifically, to a method of communication between the driver of the harvesting vehicle and the truck which allows the harvester driver to position the truck in the proper location in relation to his harvester to allow him to fill the truck to its legal capacity. 
   During the harvesting of crops such as potatoes, sugar beets, and small grains (for the purposes of simplicity the remaining of this text will refer to the harvesting of potatoes although the methods described herein can be applied to any number of similar processes such as the loading of rail cars and mining equipment), a harvesting vehicle such as a combine or a tractor pulled digger typically contains a tank for the storage of potatoes. When this holding tank reaches its holding capacity it is necessary to offload it into the box of a transport truck so that the harvesting vehicle can return to its job of harvesting the crop. Additionally, the noise generated by the harvesting equipment can interfere with the communication between the driver of the harvester and the load truck making operations more difficult. 
   As farming operations have become more efficient, it has become necessary to offload the holding tanks on the run. This means that while the harvester continues moving along the field, the holding tank is offloaded via an auger or conveyor device into the box of a truck that is traveling along side it. In performing this operation, the truck must maintain a specific position underneath the conveyor. The difficulty encountered in this operation is that the driver of the truck is unable to directly see the position of the truck box in relation to the conveyor. Additionally, it is often necessary for the truck driver to reposition the truck both side to side and backwards and forwards in relation to the conveyor to ensure that the truck box is filled to its capacity. 
   In the past, the person controlling the unloading process from the harvester would communicate with the truck driver by radio and instruct him to move to reposition his truck in relation to the conveyor to ensure the box was filled to capacity. While this system functions satisfactorily when there is only one harvester/truck combination working a field, the reality of modern farming operations is that there is almost always a plurality of such combinations working the same field during harvest operations. This situation is problematic as all the vehicles use the same radio frequency leading to confusion amongst the numerous operators. 
   From this discussion it can be seen that it would be advantageous to provides a means by which the operator of a harvesting vehicle could communicate solely with the driver of the truck with which he is working to control the location of the truck with respect to the offloading conveyor. 
   SUMMARY OF THE INVENTION 
   It is the primary objective of the present invention to provide a method by which an operator of a harvesting vehicle can communicate with the driver of a truck into which a harvested crop is being offloaded in order to control the truck&#39;s position in relation to the harvester and its offloading conveyor. 
   It is an additional objective of the present invention to provide such a method of controlling the position of a truck in relation to a harvesting vehicle which will eliminate the potential from interference in their communications from other similar vehicle tandems operating in close proximity, thereby eliminating the potential for operator confusion resulting from such interferences. 
   It is a further objective of the present invention to provide such a method of controlling the position of a truck in relation to a harvesting vehicle that effectively accomplishes this purpose in an inexpensive manner that can be operated by a wide range of individuals in a wide range of conditions. 
   These objectives are accomplished by the use of a transmitter and receiver which are mounted at convenient points within the harvesting vehicle and truck respectively. The receiver is typically mounted in the cab of the truck within the normal field of view of the driver and contains four lighted directional arrows representing directional changes of forward, backward, left, and right. The transmitter is typically mounted in the harvesting vehicle within easy reach of the operator and contains four buttons that correspond in location and function to the directional arrows on the receiver. Thus, when a button on the transmitter is depressed by the harvester operator, the corresponding directional arrow on the receiver will light up signaling the truck driver to make a change in the position of his truck relative to the harvester. Also, the system can be configured in a manner so that the directional lights are only lit when the corresponding directional button is depressed, or to stay on for a specified length of time after the directional button has been released. 
   Additionally, the transmitter may be equipped with an optional buzzer button which is used to engage a buzzer located on the receiver and employed to alert the truck driver. The buzzer may also be configured in a manner so that it may be activated by the operation of the directional buttons located on the transmitter. The use of this configuration means that the buzzer will alert on the activation of any of the buttons on the transmitter ensuring that the truck diver will be alerted to the request for a change in his orientation. 
   The transmitters used by the present invention will have a relatively short range, much like those commonly used for garage door openers, or more specifically an operational maximum of from 500 to 1000 feet. The present invention also makes use of a pair of dip switches located both in the transmitter and receiver. The dip switches allow the user to control the manner in which the transmitter encodes the signal inputs from the directional buttons and the manner in which the receiver decodes the signal before activating the directional arrows. This feature allows for the use of a number of individual units using the same frequency to operate in close quarters by providing a means by which the signals from one such unit will not interfere with the receivers of another. The use of these types of transmitters ensures that separate harvesting tandems operating in the same field will not interfere with the transmissions of the others. Thus, the use of the present invention eliminates the confusion caused by the prior use of the two way radio systems allowing the operators of harvesters to freely communicate with the truck drivers providing a more efficient means by which the harvesting process can be accomplished. 
   Finally, The transmitter and receiver of the present invention can also be constructed so that they use a battery system to provide their operational electrical needs. The use of a battery as an energy source enables the present invention to be more versatile in the manner in which it is deployed for its intended uses. Thus, the battery powered transmitters and receivers can be used in vehicles that do not have supplemental electrical outlets such as cigarette lighters allowing for its use in a greater variety of vehicles. 
   For a better understanding of the present invention reference should be made to the drawings and the description in which there are illustrated and described preferred embodiments of the present invention. 

   
     DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a front elevation view of a typical potato harvester being used in conjunction with a typical farm truck which is being used to carry the harvested potatoes that are being offloaded from the harvester. 
       FIG. 2  is a top elevation view of the harvester and farm truck of  FIG. 1  and further illustrates the manner in which the potatoes are moved via the conveyor from the harvester to the farm truck. 
       FIG. 3  is a front elevation view of the receiver component of the present invention illustrating its general configuration and the manner in which it may be powered by a connection with a cigarette lighter. 
       FIG. 4  is a front elevation view of the transmitter component of the present invention illustrating its general configuration and the manner in which it may be powered by a connection with a cigarette lighter. 
       FIG. 5  is a top elevation view of a typical truck box illustrating the manner in which the harvester&#39;s conveyor is used to begin filling a specific portion (in this illustration the forward end) of the truck box. 
       FIG. 6  is a top elevation view of the truck box of  FIG. 5  and illustrates how the change of orientation between the truck and the harvester allows the conveyor to be used to fill the rear portion of the truck box. 
       FIG. 7  is a top elevation view of the truck box of  FIG. 5  and illustrates how the change of orientation between the truck and the harvester allows the conveyor to be used to fill the inside edge of the truck box. 
       FIG. 8  is a top elevation view of the truck box of  FIG. 5  and illustrates how the change of orientation between the truck and the harvester allows the conveyor to be used to fill the outside edge of the truck box. 
       FIG. 9  is a rear elevation view of the back of the transmitter or receiver components of the present invention illustrating an alternative embodiment of the invention which makes use of an electrical battery to provide its operational energy requirements. 
       FIG. 10  is a front elevation view of a typical circuit board that is used in the transmitter and receiver components of the present invention and that contain a dip switch component which provide a mechanism by which the user can vary how the transmitter and receiver encode and decode the the signals passing between the two. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Referring now to the drawings, and more specifically to  FIGS. 1 and 2 , the present invention is used in a typical potato harvesting situation where a harvester  10  is used to dig potatoes from a field which then are transferred to the box  16  of a truck  14  driving next to it in the field. In this manner of use, the harvester  10  is typically drawn behind a towing vehicle  12  such as an all purpose farm tractor. The connection between these two vehicles employs a typical trailer configuration facilitated primarily by the use of a trailer tongue  40  connected through a hitch to the harvester frame  22 . The harvester frame  22  is also the component of the harvester  10  upon which its remaining components are built. 
   The harvester  10  itself makes use of a digger blade  18  which penetrates the surface of the field to a specified depth and removes all of the potatoes  64  contained within that specified depth. From this point, the potatoes  64  are carried up the primary conveyor  20  at the end of which they are dropped through the vine remover  32 . The vine remover  32  is essentially a series of parallel spaced bars which remove the upper portions and vines of the potato plant from the potatoes  64 . After passing through the vine remover  32 , they pass onto the secondary conveyor  30  which moves the potatoes  64  from their point of deposition to the side conveyor  24 . 
   The side conveyor  24  is essentially an elongated box made up of two parallel side conveyor frames  36  within which runs the side conveyor belt  74 . The side conveyor belt  74  transports the deposited potatoes  64  forward and upward to its terminus where they are dumped on the lower end of the conveyor boom  26 . The boom conveyor  26  is constructed in a similar fashion as the side conveyor  24  having a pair of parallel boom conveyor frames  34  and a centrally located rotating boom conveyor belt  76 . The boom conveyor  26  differs however in the fact that it is articulated and pivotally mounted at its base which allows it to be raised and lowered as needed to facilitate the loading process. The boom conveyor  26  terminates at the dump boom  38  which is the articulating tip of the boom conveyor  26  and is used to direct the potatoes  64  into the truck box  16  in order to ensure that the load  28  is properly positioned so that the truck  14  can carry its legal capacity. 
   The present invention is a device that is employed by the operators of the harvesters  10  and their related trucks  14  to control the orientation of the truck  14  in relation to the harvester  10  generally, and of the truck&#39;s box  16  to the dump boom  38  specifically. This control function is accomplished by the present invention through the use of a transmitter  56  and a receiver  42 . The transmitter  56  is located in a position within the harvester  10  or towing vehicle  12  in a location that a person (most commonly the towing vehicle  12  operator) in a position to monitor the orientation of the truck  14  can easily reach and operate it. A common place of attachment for the transmitter box  56  is on the towing vehicle&#39; dashboard  62  as illustrated in  FIG. 4 . 
   The transmitter  56  is equipped with four directional buttons  60  located symmetrically on its face. The operator employs the transmitter  56  by depressing one of its directional buttons  60  which corresponds in location to the direction he wants the truck driver to move. The directional buttons  60  (as well as the directional arrows  44  discussed below) generally illustrate devices that convey an instruction to change ones relative position in a forward, rearward, leftward, or rightward manner. The transmitter  56  then sends this signal to the receiver  42  located in the truck  14 . 
   The receiver  42  is generally located on the truck&#39;s dashboard  48  (as illustrated in  FIG. 4 ) and is equipped with four directional arrows  44  located in its face and corresponding in location to the direction buttons  60  of the transmitter box  56 . The directional arrows  44  are constructed in a manner by which they can be independently illuminated by the application of an electrical current. This current is supplied by the operation of the directional buttons  60  as described above. Thus, the use of the present invention allows the operator of the towing vehicle  12  to communicate his needs to the truck driver by engaging a specific directional button  60  which in turn is transmitted to the receiver  42  which illuminates the corresponding directional arrow  44 . This in turn directs the truck driver to reposition the truck  14  to the position that corresponds to the position indicated by the towing vehicle  12  operator. 
   Additionally, the transmitter  56  and receiver  42  contain a circuit board  90  (as illustrated in  FIG. 10 ) which has as one of its components a dip switch  92 . The dip switch  92  is a mechanism which provides the user of the present invention with a method of altering the way the transmitter  56  and receiver  42  encode and decode the signals that they are sending and receiving from each other during operations. This means that individual units of the present invention can operate on the same frequency in close proximity of one another without interfering with the specific instructions being sent between a linked transmitter  56  and receiver  42 . The dip switch  92  is made up of a series of dip switch pins  94  that are capable of being set in either an up or down position. In an operational pair of transmitters  56  and receivers  42 , these dip switch pins  94  are set in the exact same sequence of up and down positions. The position of these dip switch pins  94  controls the manner of encoding and decoding which allows for the individualization of each operational pair&#39;s signaling function. Thus, the use of the dip switch  92  provides a means by which a plurality of the present invention&#39;s transmitters  56  and receivers  42  can be used in close proximity without interfering with each others communications. 
   The electrical power necessary to operate the transmitter and receiver,  56  and  42 , is supplied through the existing electrical systems of the towing vehicle  12  and truck  14  respectively. This is accomplished by the use of a cigarette lighter adapter  52  which is connected on the trailing end of a lead wire  54  which is in turn connected at its other end to either the transmitter and receiver,  56  and  42 . The cigarette lighter adapter  52  is plugged into an existing cigarette lighter plug  50  located in the truck or towing vehicle dashboard,  48  and  62 , which provides the electricity necessary to transmit the signals or to illuminate the directional arrows  44  necessary for the operation of the invention. 
   A alternative embodiment of the present invention is illustrated in  FIG. 9  which employs a battery  80  as an electrical source as opposed to the method described above. With the use of a battery  80  as an electrical source, the back of the transmitter/receiver  78  is equipped with a battery cavity  82  into which a battery  80  is positioned. The battery  80  is typically equipped with battery contacts  86  which match in their method of construction and relative position to the cavity contacts  88  located in the battery cavity  82 . Thus, the installation of the battery  80  in the battery cavity  82  connects the battery contacts  86  with the cavity contacts  88  which completes an electrical circuit and provides the invention with the electrical current stored within the battery  80 . The battery cavity  82  is also equipped with a cavity door  84  which isolates the contained components from outside influences. 
     FIGS. 3 and 4  also illustrate the use of the optional buzzer  46 , located on the face of the receiver box  42 , and the corresponding buzzer button  58  located on the edge of the transmitter  56 . The purpose of the buzzer  46  and buzzer button  58  is to provide an audible method of alerting the truck driver to any necessary positional changes or other actions that may be required from him. The buzzer  46  can also be configured in such a fashion so that it is connected in circuit with all of the directional arrows  44 . This means that the depression of a specific directional button  60  on the transmitter  56  will not only illuminate the corresponding directional arrow  44 , but also activate the buzzer  46 . The use of this duel alert system ensures that the truck driver&#39;s attention will be gained at the appropriate times and that the harvesting operation will run as smoothly as possible. 
   The operation of the present invention in controlling the orientation of the truck  14  in relation to the dump boom  38  is further illustrated in  FIGS. 5 ,  6 ,  7 , and  8 .  FIG. 5  illustrates the truck  14  being positioned so that the dump boom  38  oriented towards the most forward end of the truck box  16 , therefore, positioning the load  28  in the front quadrant  66 . This position of the dump boom  38  is thus maintained until the operator is satisfied that the front quadrant  66  is properly filled before moving on to fill the remaining portions of the truck box  16 . 
     FIG. 6  illustrates the truck  14  moving forward in terms of its orientation to the dump boom  38  which has the effect of positioning the dump boom  38  in the rear quadrant  68  of the truck box  16 . Thus, any potatoes  64  traveling down the boom conveyor belt  76  will be deposited in this portion of the truck box  16  thereby evening out the load  28  that was deposited in the front quadrant  66  in the previous phase. The illumination of the forward and rearward directional arrows  44  controls this positioning of the dump boom  38  relative to the truck box  16  and provides for its efficient filling in terms of its front and rear quadrants,  66  and  68 . 
     FIGS. 7 and 8  illustrate the manner in which the present invention is employed to change the orientation of the truck box  16  from side to side. This side to side movement has the effect of positioning the dump boom  38  in the inside quadrant  70  with the truck  14  moving away from the harvester  10 , allowing the controller to properly fill in the inside quadrant  70  of the truck box  16 , or positioning the dump boom  38  in the outside quadrant  72  with the truck  14  moving towards the harvester  10 , allowing the inside quadrant  70  to be filled. Therefore, the use of the present invention allows its users to position the truck box  16  in the above described orientations (including all possible intermediate positions) to position the load  28  within the truck box  16  in a manner that ensures that it is filled to its designed capacity. 
   Although the present invention has been described in considerable detail with reference to certain preferred versions thereof, other versions are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred versions contained herein.