Methods and apparatus for determining factors related to sonic velocity in a gas

• US 3,286,098 A
• Filed: 02/28/1963
• Issued: 11/15/1966
• Est. Priority Date: 02/28/1963
• Status: Expired due to Term

• Current Assignee: Bernard C. Long, Olin S. Centofanti
• Original Assignee: Bernard C. Long, Olin S. Centofanti
• Inventors: Long, Bernard C., Centofanti, Olin S.
• Application Number:
  US04/261,668
• Time in Patent Office: 1,356 Days
• US Class Current: 250/230
• CPC Class Codes: G01F 23/296 Acoustic waves
• CPC Class Codes: G01N 2291/02836 Flow rate, liquid level
• CPC Class Codes: G01N 29/024 by measuring propagation velocity or propagation time of acoustic waves
• CPC Class Codes: Y10S 367/908 Material level detection, e.g. liquid level

Claims

1. A METHOD FOR PRODUCING AN ACCURATE AND VARIABLE INTERVAL OF LAPSED TIME RELATED TO SOUND VELOCITY IN A GAS WHICH COMPRISES REPEATEDLY SCANNING TWO ANGULARLYSPACED LIGHT-SENSITIVE DEVICES BY A BEAM OF LIGHT ROTATED AT CONSTANT ANGULAR VELOCITY, CONVERTING FIRST ELECTRICAL PULSES INCIDENT TO SCANNING OF ONE OF SAID DEVICES TO SONIC PULSES APPLYING SAID SONIC PULSES AT ONE POINT OT THE GAS, CONVERTING SAID SONIC PULSES TO SECOND ELECTRICAL PULSES UPON ARRIVAL OF SAID SONIC PULSES AT ANOTHER POINT IN THE GAS, AND VARYING THE ANGLE BETWEEN SAID DEVICES IN SENSE DEPENDENT UPON WHETHER SAID SECOND ELECTRICAL PULSES OCCUR BEFORE OR AFTER THE SCANNING OF THE OTHER OF SAID DEVICES TO MATCH THE TIME INTERVAL BETWEEN THE CORRESPONDING PAIRS OF FIRST AND SECOND PULSES WITH THE TIME REQUIRED FOR THE SONIC PULSES TO TRAVERSE THE GAS BETWEEN SAID POINTS.