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:
Aug. 03, 1976
Filed:
Aug. 13, 1973
Lev Petrovich Ulyanov, Moscow, SU;
Other;
Abstract
An infralow frequency controlled-member transfer function analyzer comprises an electromechanical infralow frequency generator, a rotary transformer mechanically coupled to the output shaft of the electromechanical infralow frequency generator, a matching amplifier, two modulators similar to each other, a differentiator connected to the output of the matching amplifier and through one modulator to one rotor winding of the rotary transformer, a matching filter connected to the output of the matching amplifier in parallel with the differentiator and through the second modulator to the other rotor winding, an A.C. voltage amplifier connected to one stator winding of the rotary transformer and to a servomotor which drives the rotary transformer stator carrying a means indicating the phase angle of the signal at the output of the plant under investigation, an indicating instrument connected through a switch to the other stator winding of the rotary transformer, and a second rotary transformer the stator of which is mechanically coupled to the stator of the first rotary transformer while its stator windings are alternately connected through a switch to the indicating instrument. One rotor winding is connected to a matching resistor and the other rotor winding, to the second stator winding of the first rotary transformer.