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| Number | Title | Issue Date |
| 4644177 | Fluid level and condition detector system A fluid level and condition detector system including a multimode optical waveguide for insertion into a medium including at least a first fluid whose level is to be monitored, a source of radiation for introducing into one end of the waveguide radiation ... | 02/17/1987 |
| 4641025 | System for determining the position of the boundary between substances having different refractive indices A device for determining the position of the boundary between first and second substances having different refractive indices that may be used to determine the level or volume of liquid in a container. The apparatus comprises a plurality of optical sensor... | 02/03/1987 |
| 4635281 | Means for counting drops A light source to project a light beam along an axis to a receiver means intermediate the source and the receiver to cause the light to refract so that the light reaching the receiver is substantially reduced; means to periodically introduce a quantity of... | 01/06/1987 |
| 4630476 | Liquid level gauge A liquid level gauge including an elongate support member, and, a plurality of optical fibres carried by the support member, said fibres extending on the support member generally lengthwise thereof and generally parallel to each other, said fibres being s... | 12/23/1986 |
| 4625549 | Optical fluid level indicator including float with reflecting means An optical fluid level indicator comprising a light transmitting member having a longitudinal axis, an upper end, and a lower end adapted to extend into a fluid container, the lower end including a first surface having a shape, and a portion projecting do... | 12/02/1986 |
| 4600842 | Snowfall measuring method and apparatus A probe is fixed to a vertically displaceable rack. Under the probe is a reference plate freely exposed to snowfall. The probe is periodically lowered toward the reference plate and stopped when it encounters either the plate or a layer of snow which has ... | 07/15/1986 |
| 4598742 | Method and apparatus for monitoring liquid stock in a storage tank Method and apparatus for monitoring liquid stock in a storage tank. A prism connected by optical fibers is located at a fixed position in a tank, the volume of liquid at the fixed position being determined. A computer receives data relating to the liquid ... | 07/08/1986 |
| 4587845 | Liquid level sight gauge A liquid level sight gauge comprises at least one sight tube 10, 11, a scale 12 mounted adjacent such sight tube(s) and periscope means 13, 15, 16 including a reflective member 17 mounted on an optical carriage 16 movable along the sight tube and scale fo... | 05/13/1986 |
| 4566337 | Opto-electronic position sensing An opto-electronic position sensing system comprising a series of radiation sources, a series of radiation detectors, a moveable member having a range of movement over which it controls irradiation of various ones of said detectors by various ones of said... | 01/28/1986 |
| 4559454 | Bubble detecting infusion apparatus Bubble detecting infusion apparatus for infusing a liquid from a source into a patient through the lumen of a light transmissive conduit member, which lumen has a flat wall surface portion contacted by the liquid in the lumen, the conduit member having an... | 12/17/1985 |
| 4556799 | Motion sensing apparatus with variable threshold Motion sensing apparatus comprise a mercury globule supported on an opaque concave surface having a transparent window at its lowest part. A photocell is exposed to light passing through the window as it is varied by movement of the mercury. The photocell... | 12/03/1985 |
| 4554837 | Reflective optical fluid pressure sensor The reflective optical pressure sensor of this invention is a system for measuring the pressure of a liquid comprising a light source and a capillary formed in a transparent solid having a reflective surface positioned in the light path of light from the ... | 11/26/1985 |
| 4524282 | Electro-optical level detector Level detection apparatus for determining the depth of a variable surface with respect to the apparatus is disclosed. The device includes a scanning source which causes an intense, collimated beam of light to move across the surface to be detected. First ... | 06/18/1985 |
| 4520883 | Combinatorial weighing method and apparatus with volume sensing A weighing and packaging system operates by combining weight data from a plurality of weighing machines, obtaining a combination of weighing machines giving a total combined weight value equal to a target value or closest to the target value within preset... | 06/04/1985 |
| 4508970 | Melt level sensing system and method A sensing system and method for detecting changes in the level of a liquid surface utilizing a source of essentially monochromatic illumination of narrow beam width for directing an incident beam toward a liquid surface at an oblique angle thereto, and th... | 04/02/1985 |
| 4503994 | Fiber optic fuel shutoff system An automatic fuel shutoff system for preventing fuel flow into a tank being filled when the level of fuel in the tank reaches a predetermined level. This system stops fuel flow when the passage of light from a light transmitter to a light receiver is bloc... | 03/12/1985 |
| 4501972 | Float detection system The specification discloses a method and apparatus for detecting the position of the float in a glass tube flow meter, and determining the distance of said float from a reference line on the glass tube flow meter which is being calibrated. The blockage of... | 02/26/1985 |
| 4500793 | Apparatus for monitoring inside of treating column An apparatus for remotely monitoring the color distribution of two materials charged in a treating column by moving a color sensor along a viewing window of the column. The color sensor moving along the viewing window projects a light onto the materials i... | 02/19/1985 |
| 4485856 | Apparatus for accurately filling beverage cans Apparatus for filling beverage tanks comprising a liquid manifold and a gas manifold for counter-pressurizing the liquid as it fills the tank. Supply conduits connect the tank with the manifolds. The gas supply conduit contains a coupling device for conne... | 12/04/1984 |
| 4468567 | Liquid level detecting device and method for producing the same A liquid level detecting device, which has a low transmission loss and may be miniaturized, comprising a plurality of optical fibers each composed of a core made of a transparent material and a cladding layer covering the core therewith and made of anothe... | 08/28/1984 |
| 4461576 | Optical measuring system An optical gauge having a laser or other such light source, the beam from which is cyclically directed upon a photo-detector by a rotating plane mirror, the time at which or during which in each revolution of the plane mirror the beam impinges upon the ph... | 07/24/1984 |
| 4458735 | Dispensing arrangement for a beverage such as a milkshake An arrangement for automatically controlling the dispensing of a beverage such as a frothy milk shake into an open mouth container such as a translucent paper or styrofoam cup. A dispensing station defines a designated position for the cup to be filled, a... | 07/10/1984 |
| 4453083 | Apparatus for the determination of the position of a surface Apparatus is disclosed for determining the position of a surface in which radiation from an optical radiant source is applied to the surface and, by means of a lens system, an image of the radiation is produced on a photoelectric receiver. A laser serves ... | 06/05/1984 |
| 4450722 | Water level gauge with fault detector A water level gauge with fault detector comprises a column for containing a level of water with a plurality of light sources on one side of the column and a plurality of detector assemblies on an opposite side of the column. Filters are utilized to projec... | 05/29/1984 |
| 4443699 | Fluid level measuring device with linear, high resolution output A generated signal is passed through an elongated signal conveying element positioned preferably perpendicular to the surface of a fluid the level of which is to be measured. The signal is directed from the signal conveying element to a detector element w... | 04/17/1984 |
| 4441513 | Tailings monitor for combine harvester A combine harvester vehicle having threshing, separating and cleaning stages for cut crop material and a tailings return elevator for conveying tailings to one of the stages for recycling, is provided with a tailings monitor including a photodiode for tra... | 04/10/1984 |
| 4440022 | Liquid-level detection An oil-level detector is mounted on the outside face of a glass window in the wall of an oil tank. The detector has two fibre-optic cables which extend within a cavity between the detector and the window. The ends of the cables are mounted one above the o... | 04/03/1984 |
| 4441027 | Liquid level controller for a respiratory gas humidifier device A liquid level sensing device, particularly useful for apparatus designed to humidify oxygen gas being administered to patients undergoing respiratory therapy is disclosed. The liquid level sensing device detects the liquid level in a canister having an o... | 04/03/1984 |
| 4425794 | Liquid level indicator A liquid level indicator which includes a plurality of pairs of optical fibers and a common carrier supporting at least an end portion of each fiber. The carrier is formed with an elongated passage into which, in use, liquid flows to a height dependent on... | 01/17/1984 |
| 4422714 | Ellipsoidal optical coupling device An optical coupling device wherein at least two light conductors are coupled through the intermediary of a transparent block in the shape of a half-ellipsoid on whose foci converge the end sections of the two light conductors. A light beam emerging from o... | 12/27/1983 |
| 4417782 | Fiber optic temperature sensing Fiber optic waveguides exhibiting a blackout phenomenon can be used for temperature sensing. A temperature sensing waveguide can be used in such applications as maintaining a material within a selected temperature range, freeze protection viscosity contro... | 11/29/1983 |
| 4410886 | Wall build-up detector for a multi-point level indicator An apparatus for monitoring and indicating the amount of material at a given level in a plurality of hoppers or bins includes a detector for sensing and indicating the build-up of the material on the side walls of the hoppers. A sensor positioned at each ... | 10/18/1983 |
| 4410020 | Sensor syringe A sensor syringe or hollow needle arrangement for the automatic withdrawal of a liquid sample from a liquid contained within a vessel. A duct is enclosed in a sheath or jacket-like manner by a light conductor possessing an inlet for an optical source and ... | 10/18/1983 |
| 4399711 | Method and apparatus ensuring full volume pickup in an automated pipette An automated pipette employing a device to ensure exact volume pickup and delivery. An optical device senses the presence of a liquid in the tip of the pipette. By intaking the volume past the optical device stream continuity is determined.... | 08/23/1983 |
| 4397183 | Apparatus for detecting level changes in distance An apparatus useful in detecting changes in distance comprises: a signal emitter capable of emitting a substantially constant signal; a signal reflector capable of reflecting at least a portion of the substantially constant signal and being moveable in a ... | 08/09/1983 |
| 4396911 | Multi-point level indicator system An apparatus for monitoring the level of material in a plurality of hoppers or bins includes a radiation source and sensor associated with each hopper. Each sensor generates an output signal representing the incidence of radiation passing through the mate... | 08/02/1983 |
| 4366384 | Air bubble detector Air bubbles in a transparent intravenous solution conduit are detected, regardless of whether the solution is opaque or clear, by directing a light source at the conduit and detecting light shining through the solution with a first light sensor while dete... | 12/28/1982 |
| 4365165 | Level measurement device A level measuring device suitable for measuring the level of any substance, advantageously but not necessarily dangerous substances whether due to heat, toxicity or others, with or without anti-oxidization superficial layers, including in mutual cooperati... | 12/21/1982 |
| 4358960 | Differential fiber optic proximity sensor Proximity sensor for determining the distance between a reflective surface and the sensor utilizes two output light guides positioned with the receiving end of one guide closer to the reflective surface than that of the other. When the surface is close to... | 11/16/1982 |
| 4355238 | Liquid level indicator The liquid level indicator contains a number of first light fibers, a number of second light fibers, optical lens means interposed between each output end of the first fibers and an associated input end of the second fibers, and light detectors associated... | 10/19/1982 |
