Class 33/396 - Liquid buoyed

Subclass of Class 33 - Geometrical instruments
Definition: Device wherein the body is supported, partially or wholly,
No. of patents: 32
Last issue date: 05/29/2007

Number	Title	Issue Date
7222433	Electromagnetic inclinometer An angle sensor comprising a housing (1) having horizontal and vertical axes, which housing is adapted to receive a magnetic core (5) such that the core remains in substantially the same plane, e.g. by floating on a liquid (4). The core is provi...	05/29/2007
6968627	Slope determination system A hand-held system for determining the slope of an element having an irregular surface, such as a shingled roof, or along a surface that is partially obscured by adjacent elements. The system comprises an inclinometer having a double indicator to provide two simulta...	11/29/2005
6935035	Slopemaster A slope measurement instrument consistent with certain embodiments has a magnetic base with a compartment attached to the magnetic base, the compartment having an inner face and a clear outer face, with the inner face having indicia of angular graduations thereon, t...	08/30/2005
6505409	Inclinometer An inclinometer comprising a spherical mass, a spherical shell having a reference axis and surrounding said spherical mass and a plurality of electrodes mounted on the spherical inner surface of said spherical shell, said inclinometer applied to detect th...	01/14/2003
6073354	Plumb laser beam generator with floating telescope An instrument for use in alignment, plumb and leveling functions includes a laser diode projecting a beam through a liquid contained in a vessel. Floating in the liquid is a compensator float which includes telescope optics so as to diminish the angle of ...	06/13/2000
5765290	Adaptable tip sensor An adaptable tip sensor is useful for detecting the angular tipping of an object relative to a selected frame of reference. The sensor comprises a case that defines a two dimensional straight sided V-groove in which a disk can roll. A sensing device detec...	06/16/1998
5509209	Laser plumbing device In a projected light plumb device which is buoyantly supported within a fluid-filled container on a float platform which is horizontally supported by the fluid, an improvement wherein the float platform is inclined upwardly from its outer diameter to its ...	04/23/1996
5467533	Night vision inclinometer An inclinometer which is compatible for use with night vision equipment on aircraft and other vehicles. The inclinometer includes a white zirconia sphere movable within a damping liquid of a liquid capsule....	11/21/1995
5450676	Slope angle and level indicator apparatus A slope/level indicating apparatus for determining the degree of slope or grade being created by a machine, such as a grader. The apparatus comprises a slope indicator unit which transmits slope information through a cable to a digital display which can b...	09/19/1995
5201129	Vertical indicator unit The invention relates to a vertical indicator unit for measurement comprising placing a float in a vessel filled with a liquid, supporting the vessel with an external supporting frame, securing a doughnut-like magnet integrally with the outside of the low...	04/13/1993
5134883	Pendulum-type accelerometer A pendulum-type accelerometer for use on trucks, cranes, airplanes, and boats as a multipurpose sensor. A cylinder with a damping fluid includes four equally spaced coils in a base of the cylinder and a pendulum suspended from a top of the cylinder which ...	08/04/1992
5088204	Level sensing unit and a level indicating device based thereon A level sensing unit, designed to be incorporated in a carpenter's level, is relatively insensitive to the expansion and contraction of the buoyant fluid, independent of the specific gravity of the fluid, and virtually free of oscillations accompanying a ...	02/18/1992
5042158	Inclination sensor An inclination sensor, in particular for measuring an inclination of service lines and/or ram boring machines, comprising a pendulum arranged in a measuring cell and at least one displacement sensor measuring the deflection of the pendulum. The pendulum c...	08/27/1991
4914823	Float biased level apparatus A level for determining whether a surface is horizontal and which can also be used to determine the angular relationship between the surface or a line on the surface and the horizontal. The level utilizes a rotating pendulum designed with a pointer that i...	04/10/1990
4897824	Sonar systems A sonar system for a water craft including a transducer assembly mounted to the hull of the water craft, and a control circuit for applying signals to the transducer for forward transmission by the transducer and for sensing signals reflected from objects...	01/30/1990
4876799	Level sensing unit and a level indicating device thereon A level sensing unit, designed to be incorporated in a carpenter's level, is relatively insensitive to the expansion and contraction of the buoyant fluid, independent of the specific gravity of the fluid, and virtually free of oscillations accompanying a ...	10/31/1989
4843725	Gravity-biased level apparatus A level for determining whether a surface is horizontal and which can also be used to determine the angular relationship between the surface or a line on the surface and the horizontal. The level utilizes a rotating pendulum designed with a pointer that i...	07/04/1989
4827624	Electronic level An electronic level for determining the angular orientation of a structure, where the error angle between actual and desired angular orientation of the structure is indicated by a variable signal perceptible to the user....	05/09/1989
4694584	Reduced volume digital inclinometer A high resolution, digital inclinometer having a full 360° linear range with accuracy which is independent of the angle of inclination. The linearity of the inclinometer is essentially flat throughout its range and greatly exceeds analog equivalents. A m...	09/22/1987
4614041	Magnetic angular position sensor A magnetic angular position sensor having a ferrofluid filled spherical chamber in a cylindrical housing, within which floats a body comprising a buoyant core carrying a magnet which aligns itself and the body with the earth's magnetic field, and carrying...	09/30/1986
4606133	High resolution digital inclinometer An inclinometer for producing high resolution signals of inclination relative to various references and which is capable of displaying inclination angles in various modes. High resolution data signals are produced through the use of a digital encoding whe...	08/19/1986
4590681	Level based on moire effect with ambient light A level comprises a sealed casing which holds a liquid and has a flat bottom end. It also includes a light admissive top section, bearing a periodic grating of alternating transparent and opaque stripes. A float is in the liquid inside a compartment of th...	05/27/1986
4517750	Vertical indicating method and device A device for sensing angular deviation from the vertical. A housing forming a spherical chamber contains pendulous element comprising a circular plate immersed in a liquid having a low viscosity. The center of the plate is supported for rotational movemen...	05/21/1985
4451991	Vertical indicating method and device A vertical indicating device is comprised of a compound pendulum immersed in a liquid and one or more paddles attached to the pendulum to couple its motion to the liquid. The effective length of the equivalent pendulum is much longer than the physical dim...	06/05/1984
4163325	Verticality sensors A verticality sensor comprises a casing within which is mounted a rotary pick-off device having a body attached to the casing and mounted on a shaft for relative rotational movement with respect thereto, such movement producing an output signal from the p...	08/07/1979
4099334	Dip angle data transmitter A dip angle data transmitter wherein a laminated pendulum, housed in a viscous fluid completely filling a casing, is arranged in the latter so that the distance between the surfaces of the pendulum's plates and the inner surface of the casing is found fro...	07/11/1978
4096638	Pendulum A support body is provided defining a first pair of sides, a circular recess in the body opening outwardly of the first pair of sides and a second pair of sides for abutting against a surface whose orientation relative to the horizontal is to be measured....	06/27/1978
4063366	Grade level A grade level comprising a hollow, fluid-tight cylindrical housing having its central axis normally disposed in a horizontal attitude. The housing comprises an annular wall portion and spaced-apart end members mounted on opposite sides thereof. A horizont...	12/20/1977
4034481	Instrument which is sensitive to accelerations An instrument is disclosed which comprises a liquid filled casing and a float structure in the casing. The float or floats of the float structure are fully submerged and this structure is mounted for rotation about a horizontal axis. The buoyancy force on...	07/12/1977
4027399	Positional sensing An angular positional sensor comprises a housing in which is mounted a rotary sensing device including a shaft which mounts a pendulum having relatively low inertia and a balanced member having relatively high inertia and rotatably mounted within the hous...	06/07/1977
3945391	Float controlled hydraulic leveler A hydraulic controller is disclosed which includes a housing assembly hermetically enclosing a hydraulic fluid, conduits for transporting hydraulic fluid into and out of the housing assembly, a valve control assembly for regulating the hydraulic fluid in ...	03/23/1976

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Class 33/396 - Liquid buoyed