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:
Feb. 22, 1994
Filed:
May. 01, 1992
Applicant:
Inventor:
Paul C Talmadge, Ansonia, CT (US);
Assignee:
Pitney Bowes Inc., Stamford, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
73769 ; 7386252 ; 177164 ; 324605 ;
Abstract
A method of changing the sensitivity of a transducer includes applying to the transducer a cyclic excitation signal. The excitation signal has a number of recurring phases of different amplitudes. The transducer's output signal has a like number of recurring phases, each of which corresponds to a phase of the excitation signal. One of the phases of the output signal is selected for data acquisition. Selection of a different phase changes the effective measuring range of the transducer. Preferably, the excitation signal is an a.c. signal, and the output signal is partially demodulated as part of the selection of a phase for data acquisition.