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Class Information
Number: 33/366.15
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Level or plumb, terrestrial gravitation responsive > Electrically actuated signal or indicator > Fluent sensor
Description: Subject matter wherein the gravity responsive element is a volume of flowable material.


Sub-classes under this class:

Class Number Class Name Patents
33/366.17 Having buoyant control element 14
33/366.18 Having fluent material reactive circuit control element (e.g., inductive) 14
33/366.16 Having light or radiant energy detecting circuit control element 48
33/366.21 Having resistive or contact circuit control element 36


Patents under this class:

Patent Number Title Of Patent Date Issued
7497118 Sensors for detecting position, inclination to perpendicular, movement and acceleration based on thermodynamic effects and method for operating and for manufacturing said sensors Mar. 3, 2009
7370429 Integrated electronic level device May. 13, 2008
7222433 Electromagnetic inclinometer May. 29, 2007
7188426 Inclination sensor Mar. 13, 2007
7055254 Tiltsensor Jun. 6, 2006
6880257 Signal sampling circuit of a tilt sensor Apr. 19, 2005
6802132 Electrolytic tilt sensor and method for manufacturing same Oct. 12, 2004
6732440 Orientation sensor May. 11, 2004
6725554 Electronic spirit level for measurement of inclination-execution of electric resistors and conductors Apr. 27, 2004
6722199 Sensor for detecting a rotational movement or an angular acceleration Apr. 20, 2004
6688013 Electrolytic-tilt-sensor Feb. 10, 2004
6625896 Electrolytic tilt sensor and method for manufacturing same Sep. 30, 2003
6618951 Orientation sensor utilizing intra-pattern property measurements Sep. 16, 2003
6571483 Orientation sensor Jun. 3, 2003
6530155 Orientation sensor utilizing intra-pattern property measurements Mar. 11, 2003
6516527 Inclinometer Feb. 11, 2003
6453745 Sensor device for the 3-dimensional measurement of an attitude or acceleration Sep. 24, 2002
6449857 Inclinometer and inclinometer network Sep. 17, 2002
6400159 Orientation sensor especially suitable for use in an underground boring device Jun. 4, 2002
6370789 Probe for machine tools with a tool spindle Apr. 16, 2002
6351892 Orientation sensor utilizing intra-pattern property measurements Mar. 5, 2002
6301795 Tilt sensor using magnet and magnetic sensor Oct. 16, 2001
6249984 Electrolytic tilt sensor having a metallic envelope Jun. 26, 2001
6247239 Clinometric sensor Jun. 19, 2001
6123866 Electrolytic solution for clinometric sensor Sep. 26, 2000
6066955 Orientation sensor especially suitable for use in an underground boring device May. 23, 2000
5930907 Uniaxial horizontal sensor Aug. 3, 1999
5780741 Sensor employing a sliding magnet suspended on ferrofluid Jul. 14, 1998
5625955 Tilt sensor May. 6, 1997
5552703 Inclination sensor using sensing coils wound on linear vessel partially filled with fluid Sep. 3, 1996
5524894 Head movement sensor for golf practice Jun. 11, 1996
5440817 Vertical reference and attitude system Aug. 15, 1995
4662809 Automatic level device May. 5, 1987
4651433 Pressure sensitive leveling device Mar. 24, 1987
4163325 Verticality sensors Aug. 7, 1979
4063366 Grade level Dec. 20, 1977



 
 
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