Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive
Patent
1981-07-27
1983-05-24
Little, Willis
Geometrical instruments
Indicator of direction of force traversing natural media
Level or plumb, terrestrial gravitation responsive
33378, 73722, 73728, G01C 504
Patent
active
043844103
ABSTRACT:
There is disclosed a hydrostatic leveling system including a pair of indicator heads connected by a liquid hose for equilizing static pressure in the liquid mercury pools of the indicator heads and a gas hose for equalizing the gas or vapor pressure within the heads above the pools of mercury. Each head is a float connected to the stem of a precision measuring gauge with graduations on the order of ten-thousandths of an inch. The indicator heads have identical structures and thus when they are resting on a level surface they may be reversed in location without change in gauge indicator reading; any difference in the reading is a measure of out-of-level condition. The space for the pool is sealed with a very flexible diaphragm between the float and the wall of the pool cavity. A plunger in the cavity is operated by a solenoid in the cavity to periodically thump the float to reduce tendency to stick due to surface tension, friction and hysteresis. A timer and power supply for the solenoids is located in a control box coupled to the fluid hose which has a metal conductor running therethrough for one conductor to the solenoid and the other conductor is provided by the mercury in the hose.
REFERENCES:
patent: 2438758 (1948-03-01), Leach
patent: 3109908 (1963-11-01), Clason
patent: 3645135 (1972-02-01), Hadley
patent: 3949484 (1976-04-01), Cluley et al.
patent: 3967504 (1976-07-01), Akeley
patent: 4026156 (1977-05-01), Bowditch et al.
patent: 4087920 (1978-05-01), Huggett et al.
patent: 4148313 (1979-04-01), Bird et al.
patent: 4174638 (1979-11-01), Zabler et al.
patent: 4217779 (1980-08-01), Nasuda et al.
Karstens Bernard B.
Melugin Dwayne R.
DRM Industries, Inc.
Little Willis
LandOfFree
Precision hydrostatic levelling system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Precision hydrostatic levelling system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Precision hydrostatic levelling system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2140613