Ultrasonic transducer mounting and coupling assembly

• US 4,019,373 A
• Filed: 05/28/1975
• Issued: 04/26/1977
• Est. Priority Date: 06/17/1974
• Status: Expired due to Term

• Current Assignee: Canadian General Electric Co Ltd (General Electric Company)
• Original Assignee: Canadian General Electric Co Ltd (General Electric Company)
• Inventors: Freeman, David Lewis, Flemons, Ralph Seymour
• Primary Examiner(s): Ruehl, Charles A.
• Application Number:
  US05/581,636
• Time in Patent Office: 699 Days
• Field of Search: 73/71.5 US, 73/194 A, 310/8.2, 310/8.3, 310/9.1, 310/8.7
• US Class Current: 73/644
• CPC Class Codes: G01F 1/662 Constructional details
• CPC Class Codes: G01N 2291/02836 Flow rate, liquid level
• CPC Class Codes: G10K 11/004 Mounting transducers, e.g. provided with mechanical moving or orienting device mountings specially adapted to a particular sound-producing device, see the preceding groups G10K1/00 - G10K9/00, e.g. G10K1/26, G10K1/28, G10K9/22; arrangements of sonic watch equipment on submarines B63G8/39; buoys B63B22/00
• CPC Class Codes: G10K 11/02 Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators

Abstract

An ultrasonic transducer apparatus for sensing flow velocity through a pipe wall has a pair of strap-on transducer assemblies for securing to an unprepared pipe surface, the energy coupling between each transducer unit and the pipe or other working device being provided by an elastomeric contact pad, which also facilitates rapid replacement of the transducer crystal, by simplified assembly.

Claims

1. A transducer coupling for providing electro-mechanical energy coupling with a pipe, comprising;

adjustable mounting means for attaching said coupling to said pipe, having casing means secured thereto in spaced relation from the pipe when installed, a resilient elastomeric coupling member, securing means holding said coupling member is attached relation to the casing means, having an outer end of said coupling member projecting therefrom to contact the surface of said pipe in compressed relation therewith, a transducer having one surface thereof secured in compressed relation against the other end of said coupling member, by way of electrically insulated mounting means, first and second electrical connections to said transducer, said first connection contacting said one surface of the transducer, being held in contacting relation therewith by compressive force acting between said coupling member and said insulated mounting means, said insulated mounting means securing said second connection in resilient contacting relation to a second face of said transducer.

2. The transducer coupling as claimed in claim 1, said coupling member securing means including an insulating ring securing said coupling member in compressed relation with said casing means, and fastening means removably securing said insulating ring to the casing means to permit removal of the ring and coupling member, to provide ready access to said transducer for purposes of replacement.

3. The transducer coupling as claimed in claim 1, said insulating ring securing said first electrical connection to said transducer one surface and to an electrically conducting portion of said casing.

4. The transducer coupling as claimed in claim 2 including adjustable loading means to adjustably vary the position of said insulated mounting means relative to said casing, for controlling the force securing said second connection to said transducer.

5. The coupling as claimed in claim 1 in combination with a second said transducer coupling secured to said mounting means in predetermined axially spaced relation from the first said coupling relative to said pipe.