Magneto-electric motion detecting transducer

• US 3,129,347 A
• Filed: 07/20/1960
• Issued: 04/14/1964
• Est. Priority Date: 07/20/1960
• Status: Expired due to Term

• Current Assignee: Unison Industries Limited Partnership
• Original Assignee: Tullio Tognola
• Inventors: TULLIO TOGNOLA
• Application Number:
  US04/044,138
• Time in Patent Office: 1,364 Days
• US Class Current: 310/15
• CPC Class Codes: G01H 11/02 by magnetic means, e.g. reluctance
• CPC Class Codes: G01P 15/11 by inductive pick-up
• CPC Class Codes: G10K 11/00 Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general

Claims

1. A VIBRATION-DETECTING TRANSDUCER, WHICH COMPRISES AN ELONGATED CYLINDRICAL NON-MAGNETIC TUBULAR HOUSING, MEANS FIXEDLY MOUNTING AN ANNULAR PICK-UP COIL COAXIAL OF THE HOUSING AND INTERMEDIATE THE LENGTH OF THE HOUSING, A CIRCULAR PERMANENT MAGNET FITTING WITHIN THE HOUSING AND SLIDABLE LONGITUDINALLY THEREWITHIN SUBSTANTIALLY FREE OF MECHANICAL RESTRICTION OF SUCH SLIDING MOVEMENT, SAID MOVABLE MAGNET BEING FLUX COUPLED TO THE COIL AND HAVING OPPOSITE POLES AT OPPOSITE ENDS THEREOF, TWO CIRCULAR PERMANENT MAGNETS BEYOND THE OPPOSITE ENDS OF THE MOVABLE MAGNET AND FIXEDLY CONNECTED TO THE HOUSING, THE ENDS OF THE FIXED MAGNETS CONFRONTING THE ENDS OF THE MOVABLE MAGNET BEING SPACED FROM THE ENDS OF THE MOV-