Dwayne R Melugin, 78218 Madison St, Webb City, MO 64870

6088922, Jul 18, 2000

Jul 15, 1998

9/115703

Dwayne R. Melugin - Webb City MO

G01C 900
G01C 918

33367

A method and apparatus for hydrostatic leveling including a pair of liquid filled containers connected by a liquid hose for equalizing static pressure in the mercury pools in the indicating heads and a gas hose for equalizing the gas or vapor pressure within the heads above the mercury. Each head has an internal float with a display gauge. The indicating heads have identical structures and thus when they are resting on the 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. An elevator is used to support one head while a mobile tool is used to support the other head. The elevator comprises a rigid body that is secured to a stable structure adjacent the object to be leveled and includes a vertically displacable set-off for supporting the head. The mobile tool includes a level system for insuring consistent alignment of the head to the object being leveled. When used, the second head is placed on the tool and both are leveled against the object.

4384410, May 24, 1983

Jul 27, 1981

6/287258

Dwayne R. Melugin - Carl Junction MO
Bernard B. Karstens - Eureka Springs AR

DRM Industries, Inc. - Webb City MO

G01C 504

33367

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.