Patent Publication Number: US-4221380-A

Title: Simulated vehicle radar transceiver

Description:
BACKGROUND OF THE INVENTION 
     The use of radar devices is common in the enforcement of speed laws by police agencies. The physical presence of such radar devices on a police car is a deterrent to speeding. Most police agencies are not able to provide radar equipment on the majority of cars in traffic service because of the high cost of the radar units. 
     SUMMARY OF THE INVENTION 
     This invention provides a simulated radar device which may be manufactured at very low cost, and which simulates the appearance of a police radar unit mounted in the window of a police car. The decoy radar device according to the invention is an elognated body of soft, foam plastic material which terminates at one end in a generally flat vertical plane having the appearance of an antenna. A horizontally projecting rail extends substantially the length of the body, and is adapted to be clamped against the top of a car window frame by cranking the glass up against the projection of the simulated radar. The planar surface of the antenna simulation is more reflective than the rest of the decoy body to facilitate observation by approaching motorists. Preferred embodiments have a channel to receive the top edge of the car window, and detailed simulation of the radar antenna in the form of a truncated cone wherein the base of the cone is the vertical plane of the antenna. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     Referring to the accompanying drawings: 
     FIG. 1 is a side elevation view of the simulated vehicle radar transceiver according to the invention and shown is use as a radar decoy on a motor vehicle; 
     FIG. 2 is a top plan view of the invention as shown in FIG. 1; 
     FIG. 3 is a bottom plan view of the invention as shown in FIG. 1; 
     FIG. 4 is a front elevation view of the invention as shown in FIG. 1; 
     FIG. 5 is a rear elevation view of the invention as shown in FIG. 1; 
     FIG. 6 is a cross-sectional view of the invention, taken along section line 6--6 of Fig. 1; 
     FIG. 7 is a perspective view of the preferred embodyment of the invention shown in FIG. 1; and 
     FIG. 8 is another preferred embodyment of the invention, shown in perspective. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODYMENTS 
     Referring to FIG. 1 a simulated vehicle radar transceiver, hereinafter referred to as a &#34;decoy&#34; 1 is shown in use on a motor vehicle 2, shown in phantom, and is mounted on the window 3 by clamping the decoy 1 between the top edge 4 of window 3 and the top window frame 5. 
     In FIG. 2 the decoy 1 is shown in plan view and having an elongated body 6 with a large end 7 and a smaller end 8. 
     In FIG. 3 the decoy 1 is shown in a bottom plan view and showing a generally parallelopiped projection 9 extending from body 6. 
     In FIG. 4 the decoy 1 is shown having the smaller end 8 of body 6 extending into projection 9, which is provided with a window receiving channel 10 along its length. 
     In FIG. 5 the large end 7 of decoy 1 is shown having a generally planar surface 11 in a vertical plane which is normal to the long axis of body 6. 
     In FIG. 6, a cross-sectional view through section line 6--6 of FIG. 1, body 6 is shown as made of an elastomeric foam material and having projection 9 clamped between the top edge 4 of a motor vehicle window 3 and the respective top window frame 5. 
     In FIG. 7 decoy 1 is shown wherein body 6 has its larger end 7 terminated in the vertical plane 11, which comprises the base plane of a truncated cone 12. 
     In FIG. 8 an alternate embodyment is shown of a decoy 13 having an elongated body 14 and an attached projection 15 which is provided with a full length channel 16. Body 14 has a large end 17 which terminates in a generally planar vertical surface 18, comprising the base plane of a truncated pyramid 19.