Tapped ultrasonic delay line and uses therefor

• US 3,289,114 A
• Filed: 12/24/1963
• Issued: 11/29/1966
• Est. Priority Date: 12/24/1963
• Status: Expired due to Term

• Current Assignee: John H. Rowen
• Original Assignee: John H. Rowen
• Inventors: Rowen, John H.
• Application Number:
  US04/333,022
• Time in Patent Office: 1,071 Days
• US Class Current: 333/150
• CPC Class Codes: G10K 11/36 Devices for manipulating acoustic surface waves electro-acoustic amplifiers H03F13/00; networks comprising electro-acoustic elements H03H9/00
• CPC Class Codes: H03H 9/14517 Means for weighting
• CPC Class Codes: H03H 9/14538 Formation
• CPC Class Codes: H03H 9/25 Constructional features of resonators using surface acoustic waves devices for manipulating acoustic surface waves in general G10K11/36
• CPC Class Codes: H03H 9/423 with adjustable delay time
• CPC Class Codes: H03H 9/44 Frequency dependent delay lines, e.g. dispersive delay lines
• CPC Class Codes: H03H 9/64 using surface acoustic waves

Claims

1. AN ULTRASONIC DEVICE COMPRISING A BODY OF PIEZOELECTRIC MATERIAL, MEANS FOR LAUNCHING WITHIN SAID BODY AN ULTRASONIC WAVE HAVING A PARTICLE DISPLACEMENT THAT IS NORMAL TO ONE SURFACE OF SAID BODY AND HAS A MAXIMUM AMPLITUDE AT SAID SURFACE THAT DECREASES WITH DISTANCE AWAY FROM SAID SURFACE, ELECTRODE MEANS INCLUDING A PLURALITY OF CONDUCTIVE MEMBERS SPACED APART ON SAID ONE SURFACE UNIFORMLY FROM EACH OTHER BY ONE WAVELENGTH OF SAID ULTRASONIC WAVE FOR DETECTING A PIEZOELECTRIC FIELD NORMAL TO SAID SURFACE THAT IS GENERATED BY SAID PARTICLE DISPLACEMENT AT A MULTIPLICITY OF SPACED POINTS ALONG THE DIRECTION OF PROPAGATION OF SAID WAVE, AND MEANS FOR ELECTRICALLY CONNECTING SAID CONDUCTIVE MEMBERS TOGETHER TO PRODUCE AN OUTPUT REPRESENTATIVE OF THE SIMULTANEOUS SUM OF SAID FIELDS DETECTED AT SAID MULTIPLICITY OF POINTS.