The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 2008
Filed:
Dec. 05, 2002
Michael John Radley Young, Bremridge, Ashburton, Newton Abbot, South Devon, TQ13 7JX, GB;
Stephen Michael Radley Young, Bremridge, Ashburton, Newton Abbot, South Devon, TQ13 7JX, GB;
Neil Christopher Pearse, Woodland, Ashburton, Newton Abbot, South Devon, TQ13 7LL, GB;
Michael John Radley Young, Bremridge, Ashburton, Newton Abbot, South Devon, TQ13 7JX, GB;
Stephen Michael Radley Young, Bremridge, Ashburton, Newton Abbot, South Devon, TQ13 7JX, GB;
Neil Christopher Pearse, Woodland, Ashburton, Newton Abbot, South Devon, TQ13 7LL, GB;
Other;
Abstract
The system controls the frequency of an ultrasonic signal to be applied to a waveguide, such that the frequency corresponds to a preferred resonance mode of the waveguide and not to adjacent undesirable resonance modes. The system operates by carrying out a first scan of a predetermined portion of the generated signal, determining the number of resonance modes of the waveguide within this portion and selecting from these resonance modes either that one mode which is at a central frequency or that one mode which is at a frequency nearest thereto. The system may also set limits on each side of the selected resonance mode and carry out a second scan within these limits each time that the generator is activated to check whether the selected resonance mode is drifting.