Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Sonic direction finder










Image Number 3 for United States Patent #4143351.

1. A direction finding system for determining the direction from which short sonic or ultrasonic pulses are incoming, comprising: a plurality of electroacoustic transducers forming a circular arrangement; electronic means for sequentially switching in and out pairs of diametrically opposed transducers; differential means having two inputs, respectively connected by said electronic means to said switched-in transducers, and an output for providing the differential output signal of each of said pairs; and means for deriving the phase of said output signal.








 
 
  Recently Added Patents
Adaptive control for uncertain nonlinear multi-input multi-output systems
Methods for predicting cardiac toxicity
Gathering user feedback in web applications
System and method for managing a loyalty program via an association network infrastructure
LED driving circuit, LED illumination appliance, LED illuminator, and LED illumination system
Automatic pill dispenser
Interconnecting virtual domains
  Randomly Featured Patents
Ethynyl terminated ester oligomers and polymers therefrom
Dynamic reconfiguration of resources through page headers
Slicing machines
Bath tub
Manufacturing method of display apparatus
Phototiming control method and apparatus
Method and apparatus for reducing the pollution of boat harbors
Digital file transfer device
Method for adaptive segment refinement in optical proximity correction
Light-sensitive image-forming material