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:
Dec. 05, 1978
Filed:
Oct. 27, 1977
Richard Soldner, Erlangen, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
In an illustrated embodiment, a selective receiver receives a first echo impulse produced at the interface between the precursor water path and the subject under examination, as a measure of the precursor transit time (T.sub.v). Thereafter, each transmit pulse is synchronized with the receipt of such echo impulse so that multiple echoes resulting from such echo impulse coincide in time with desired echo signals, and thus do not disturb the accuracy of the display. By way of example, a trigger stage may respond to the interface echo to directly trigger transmission of the next ultrasonic pulse. The trigger stage may also actuate a first monostable with a time interval corresponding to the nominal precursor transit time (T.sub.v), a second monostable being triggered by the first monostable to establish the actual gating interval for receipt of the resultant interface echo signal. The gated interface echo signal may be compared with a standard level and any deviation used to control amplification of the receiver.