referring now particularly to the drawings , fig1 presents a perspective view of trolling assembly 10 , which is to be understood to be an exemplary embodiment of this invention , and demonstrates how the above mentioned disadvantages have been overcome . it should be noted that the disclosed invention is disposed to embodiments in various sizes , shapes , and forms . therefore , the embodiments described herein are provided with the understanding that the present disclosure is intended as illustrative and is not intended to limit the invention to the embodiments described herein . fig1 illustrates an embodiment of trolling assembly 10 for towing by a fishing line from the port side of a fishing boat ( not shown ). it should be understood that another embodiment for towing by a fishing line from the starboard side of a boat is the mirror image of the embodiment shown . planar board casing 12 of trolling assembly 10 , has spaced , generally parallel , inboard and outboard surfaces 16 and 14 , respectively . inboard surface 16 and outboard surface 14 are connected by longitudinal capping surface 15 , longitudinal capping surface 17 , and back end surface 13 . inboard surface 16 tapers to leading forward edge , or end , 18 until it joins ( meets ) outboard surface 14 . planer casing 12 is generally hollow and will be discussed in more detail below . tapered leading edge 18 of casing 12 will always be facing inboard , tapering from the outboard body wall 16 toward edge 18 . this provides a positive attack angle carrying the trolling assembly away from the lateral side of the boat as the assembly is pulled by the boat through the water . also shown in fig1 is first fishing line release 70 linked to planer board inboard surface 16 by linking member 72 about mid - height of inboard surface 16 and proximate to tapered leading edge 18 . second fishing line release 74 , located at mid - height back end surface 13 , is linked to the planer board by linking member 76 . further discussion of the structure and use of fishing line releases 70 and 74 is given below in conjunction with fig4 a - 4 e . briefly , a fishing line is connected to fishing line release 70 which may be used to hold the trolling assembly to the boat while a fish is played or to release the trolling assembly from the boat as a fish is played , as desired . after attaching the fishing line to fishing line release 74 , it is then threaded through plunger 80 , which can be seen in fig1 , and 3 located proximate to fishing release 70 . the function of plunger 80 to activate the strike indicator when a fish strikes will be explained in detail below . from plunger 80 the fishing line is then attached to release 74 which will release the line when a fish strikes . light switch 20 is shown positioned on longitudinal cap surface 15 to provide for at least one light ( which light is housed in water - tight compartment 30 ) to be illuminated while fishing in the dark so that the location trolling assembly 10 can be easily seen . also illustrated in fig1 is fin 78 integrally formed with planer casing 12 during the molding process . it is to be understood , however , that fin 78 can be affixed to casing 12 in any other manner that will accomplish a fixation . in the embodiment shown , fin 78 projects perpendicularly from inboard surface 16 to enhance the stability of planer board 10 , but may be formed at any other angle to surface 16 to achieve a desired effect . fig2 , a perspective view of the planer board &# 39 ; s outboard side 14 , shows water - tight cover 22 covering water - tight compartment 30 ( shown in fig3 ). handle 24 provides for sure grasping of water - tight cover 22 when it is to be positioned over the water - tight compartment or when removing the cover . water - tight cover 22 is fixed firmly over the water - tight compartment using water - tight seal 34 and four fasteners 26 . fig3 , a cross - sectional view of planer assembly 10 taken along 3 - 3 of fig2 , shows the two compartments located in the hollow space of casing 12 , compartment 25 and water - tight compartment 30 separated by separating wall 27 . compartment 25 may be used to hold a lightweight buoyancy insert , such as foam block 50 . in the embodiment shown , casing 12 is formed by injection molding and , thus , being hollow , is naturally buoyant . however , the addition of a buoyancy insert , such as foam block 50 , ensures that trolling assembly 10 is maintained in a vertical position while in the water . the weight provided by batteries 32 ( see fig5 ) housed in water - tight compartment 30 provide for trolling assembly 10 to be maintained in a stable , vertical position . because of the weight provided by batteries 32 no extra weights are normally required . as seen in fig1 - 3 and in fig8 and 9 , first fishing line release 70 is attached to inboard surface 16 of planar board casing 12 by linking member 72 and is structurally identical to second fishing line release 74 , which is attached to back end surface 13 of planar board casing 12 by linking member 76 . novel fishing line release 40 is illustrated in fig4 a - 4 e . fig4 a is a perspective view of release 40 as it appears ready to use . fishing line release 40 comprises three separate and unique parts : first clamping jaw 41 , second clamping jaw 43 , and moveable clamping collar 44 . except for each clamping jaw having a complementary mating part of snap - like fitting 42 on the distal end of their inside surface , the inner surfaces of first clamping jaw 41 and second clamping jaw 42 would be mirror images of each other . to assemble the three parts of release 40 ; first complementary part of snap tab 42 , on the distal end of the inner surface of first clamping jaw 41 ( the inner surface is that side of first clamping jaw 41 that is opposite to the side fitted with button stop 49 ), is fitted to the second complementary part of snap tab 42 that is located on the inner surface of second clamping jaw 42 . the molded shape of the two clamping jaws ensures that when the jaws are snapped together at their distal ends , as just described , their proximal ends are biased to maintain a separation distance referred to as space 48 through which a fishing line is threaded . space 48 is best seen is fig4 c and 4 d . to ensure that the release is firmly clamped about the fishing line , moveable clamping collar 43 is placed about the clamping jaws starting from the distal end and moved toward the proximal end until it reaches the button stop . so that the fishing line release does not prematurely release the fishing line , the fishing line can be more securely attached to the fishing release in the following manner . after the fishing line is threaded through space 48 , the line may be wrapped about the proximal end of the release and inserted into grooves 45 and 47 located on the first clamping jaw and then into grooves 55 and 57 located on the second clamping jaws ( see grooves illustrated in fig4 b , 4 c , and 4 e ). the arrangement of the electrical elements in water - tight chamber 30 are shown in cross - section in fig5 . the power source , in the embodiment shown , is from a pair of batteries 32 . the on and off status of light 64 is controlled by light switch 20 . plunger 80 is positioned to be partly inside the water - tight compartment and partly outside of the compartment so that crochet - like hook 84 that is located on the end of plunger 80 extends out from water - tight compartment 30 to project out from the inboard side of the planer proximate to fishing line release 70 . crochet - like hook 84 provides the means to connect a fishing line to the plunger . spring 38 and second contact 54 are fixed to the end of plunger 80 that is secure inside water - tight compartment 30 . spring 38 biases second contact 54 away from first contact 52 fixed to sealing rim 36 . inside sealing rim 36 is water - tight seal 34 , in the embodiment shown , seal 34 is an o - ring . when a fish strikes the fishing line is released from line release 74 but remains attached to crochet - like hook 84 of plunger 80 and to line release 70 so that the pull of the fish on the line pulls plunger 80 further out of the water - tight compartment causing second contact 54 to come into contact with first contact 52 providing for the circuit to close ( see idealized wiring scheme shown in fig7 ) which allows current to power blinking light 62 . in the embodiment shown , blinking light 62 is the strike indicator , indicating that a fish has taken the bait . the blinking light can be seen in daylight or dark . it should be understood that the strike indicator could take many forms , such as a pulsating strobe light or an audio effect . fig6 shows an arrangement of the electrical elements in cross - section . in the embodiment illustrated in fig6 , it can be seen that night illumination is provided by four lights 64 that , as is illustrated in fig7 , are connected in parallel to reduce the risk of all the lights going out at the same time . fig8 and 9 show , schematically , how the strike indicator of trolling assembly 10 is used to indicate when a fish is striking . in fig8 illustrates how to rig a fishing line to the board of this invention to tow trolling assembly 10 . this is done by having the line from the boat clamped first to release 70 . looping the clamped fishing line through the four grooves on the release ( as described above ) after it is threaded through the space between the clamping jaws will keep the line from slipping . the line is then attached to the crochet - like hook of plunger 80 and then clamped to release 74 . fig9 illustrates how the trolling assembly reacts when a fish strikes . when a fish pulls on the fishing line , line release 74 will release the fishing line so the planer board reorients . the fishing line remains attached to plunger 80 and , if desired , to release 70 . after the fishing line is released from release 74 , the pull on the line pulls plunger 80 opposite to how it is biased by the spring that is attached to the end of the plunger that is located inside the water - tight compartment . the taut fishing line pulls the plunger further out from the water - tight compartment through the inboard side of planer board forcing contacts 52 and 54 together creating the closed circuit that activates the blinking light strike indicator . if the fishing line is kept attached to release 70 , the trolling assembly can easily be pulled in with the catch . the foregoing description , for purposes of explanation , used specific and defined nomenclature to provide a thorough understanding of the invention . however , it will be apparent to one skilled in the art that the specific details are not required in order to practice the invention . thus , the foregoing descriptions of the specific embodiment of the lighted trolling planer board with strike indicator are presented for purposes of illustration and description . they are not intended to be exhaustive or to limit the invention to the precise forms disclosed . those skilled in the art will recognize that many changes may be made to the features , embodiments , and methods of making the embodiments of the invention described herein without departing from the spirit and scope of the invention . furthermore , the present invention is not limited to the described methods , embodiments , features or combinations of features but include all the variation , methods , modifications , and combinations of features within the scope of the appended claims such as the number and kind of lights used for night fishing , the shape and size of the planer board , the materials from which the board is made , the number of compartment in the hollow space of the board , more or less hollow space in the board casing , and the particular means used to indicate a strike , to name just a few examples . the invention is limited only by the claims .
a trolling planer board made of lightweight translucent material has a continuous light source for night fishing and a day or night easily perceptible strike indicator . the light , indicator , and their power supply are housed in a water - tight compartment away from the elements and fishing lines . the strike indicator may comprise a blinking light , a strobe light , a sound , or any other alerting means . fishing line releases comprise only three moldable pieces , made of weather impervious material and can be used to maintain a hold on the fishing line or to release it , as desired . the planer , made of weather impervious material and having no exposed accessory parts that are sensitive to the elements , can be used in fresh or salt water . the planer &# 39 ; s hydrodynamic design eliminates the need for planning board rods and heavy test lines and the weight of the power supply eliminates any need for additional weights .