Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1977-01-31
1977-12-20
Woodiel, Donald O.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
73302, 73406, G01L 708
Patent
active
040634590
ABSTRACT:
A variable-span pressure gauge adapted to be calibrated over a wide pressure range, depending upon particular installation requirements relating to the size of the tank and type of liquid to be stored therein, and wherein the pressure to be measured is introduced through a pressure fitting to a pressure chamber defined by a diaphragm having a force bar mounted thereto, the force bar being arranged to engage a flexible lever so as to be moved with the movement of the diaphragm. A second spring lever is caused to flex with the first lever in an adjusting ratio by means of an adjustable span-slider bar and screw member disposed therebetween, through which the gauge pointer is calibrated. The movement of the second lever causes the rotation of a motion shaft which, in turn, operates a gear train operably inter-disposed between the motion shaft and the pointer, wherein the shaft of the pointer has attached thereto a hairspring to keep the motion amplification loaded against backlash or lost motion, the end result thereof being a pointer rotation which is directly proportional to the applied pressure.
REFERENCES:
patent: 1310648 (1919-07-01), Clift
patent: 3061823 (1962-10-01), Crossley
Lojacono Francis X.
Woodiel Donald O.
LandOfFree
Variable-span pressure gauge does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable-span pressure gauge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable-span pressure gauge will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-593416