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Mechanical ultrasonic scanner

  • US 5,088,495 A
  • Filed: 01/31/1990
  • Issued: 02/18/1992
  • Est. Priority Date: 03/27/1989
  • Status: Expired due to Term
First Claim
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1. A mechanical ultrasonic scanner for providing an ultrasonic scanning beam comprising:

  • a housing;

    a transducer element arranged in said housing;

    means for swinging said transducer element; and

    means for detecting a swinging angle of said transducer element, said detecting means including a first member which is swung together with said transducer element, and a second member having front and rear surfaces and attached to said housing in a manner such that the rear surface of said second member is in contact with the housing and the front surface of the second member faces to a part of a front surface of said first member which defines a swinging locus plane of the first member, said detecting means causing one of the first and second members to generate a magnetic field at least in a space between the front surface of the second member and the part of the swinging locus plane of the first member, causing the other of the first and second members to detect a strength of the magnetic field which changes in correspondence with a swinging angle of the first member, and detecting the swinging angle of said transducer element on the basis of the change in strength of the detected magnetic field.

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