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| Number | Title | Issue Date |
| 7540187 | Sight glass apparatus A sight glass apparatus providing visual information concerning the presence of absence of liquid in a refrigeration system has a sight glass with a pair of clear glass bodies secure to a housing having a chamber for the liquid. The bodies have angled prismatic surf... | 06/02/2009 |
| 7290843 | Recording apparatus having a device for detecting the presence or absence of a liquid A device for detecting the presence or absence of a liquid, which is installed on an ink-jet recording apparatus, is configured to determine the presence or absence of ink in the ink flow path by detecting the reflection of light from a light transmission portion by... | 11/06/2007 |
| 7259383 | Optical transducer for detecting liquid level An optical transducer for determining the presence or absence of liquid or the like in a reservoir includes a housing with a hollow interior and an optical probe that extends through the housing. The optical probe has a central axis, a proximal end positioned in the... | 08/21/2007 |
| 7172259 | Recording apparatus having a device for detecting the presence or absence of a liquid A device for detecting the presence or absence of a liquid, which is installed on an ink-jet recording apparatus, is configured to determine the presence or absence of ink in the ink flow path by detecting the reflection of light from a light transmission portion by... | 02/06/2007 |
| 7161165 | Optical transducer for continuously determining liquid level An optical transducer for determining liquid level within a container includes a sensing probe having a first elongate measurement face and a second elongate measurement face that converges toward the first measurement face. A light source is positioned for directin... | 01/09/2007 |
| 6921911 | Method and device for optically determining a filling level in liquid-filled containers In a method of optically determining a level of liquid in a liquid-filled container a light guide body projects into the container. The light guide body has an end face for the entry and exit of light and stepped side faces forming separate reflection faces. The lig... | 07/26/2005 |
| 6857315 | Armored tubular sight gauge with integral valves and misalignment unions An armored sight gauge assembly of the type having a sight tube that is placed between first and second spaced apart fittings to show a liquid level comprising an elongated main body positioned between and permanently connected to the first and second fittings. The ... | 02/22/2005 |
| 6851581 | Washing agent dispenser for a household a dishwasher A washing agent dispenser is described, for a household washing machine, namely a dishwasher, said dispenser including a tank for containing a liquid washing agent, to which a device is associated for the visual control of the level of said liquid washing agent. Acc... | 02/08/2005 |
| 6578418 | Sight glass A sight glass apparatus has a liquid level indicator for identifying the level of a clear to slightly translucent liquid in tube by a change in color of the indicator. The indicator has a transparent body with a convex lens, and a concave lens at opposite... | 06/17/2003 |
| 6575028 | Auto-cleaning oil-gauge for axle-ends of vehicles An oil-gauge for the axle-end of a vehicle includes a transparent or translucid lid (15) for inspecting the level of oil in a chamber (13) housing the wheel-mounting bearings. A disk partition (23) is bolted to the inside of the lid to form a shallow subc... | 06/10/2003 |
| 6258612 | Determination of flux prior to package assembly A package assembly is formed by applying flux to a device and/or a substrate and inspecting the applied flux to determine whether the amount applied is within a predetermined range. Embodiments include applying a rosin based flux on a laminate substrate a... | 07/10/2001 |
| 5997121 | Sensing system for detecting presence of an ink container and level of ink therein A low ink sensing system is combined with an ink cartridge detection system to enable a more efficient ink jet printer. An ink container which supplies ink to an associated printhead is modified by the incorporation of two light directing elements, in the... | 12/07/1999 |
| 5782381 | Container for carrying and dispensing liquid and semi-liquid products A container for carrying and dispensing liquid and semi-liquid products includes an inner product tank received within an outer protective tank. The inner tank receives the liquid or semi-liquid product to be transported from one location to another, whil... | 07/21/1998 |
| 5103648 | Oil level control system An oil level sensor device for sensing and controlling the level of oil in the crankcases of refrigeration compressors, each compressor having a crankcase with a housing for oil that accumulates during the compression operation and each housing having an ... | 04/14/1992 |
| 5072616 | Fiber optic level alarm A device for determining the level of water and/or steam in a boiler is disclosed. The device is a liquid level gauge (10) of the Blackburn type and utilizes an optical fiber cable (44) to intercept the light that passes in a relatively straight path thro... | 12/17/1991 |
| 5062828 | Hypodermic syringe A small bore plastic syringe body is disclosed with improved visual amplification of interface surfaces between a light transmissive liquid and air within the syringe bore using a solid reflective colored strip on the syringe tube and located on one side ... | 11/05/1991 |
| 5007254 | Additive fluid viewing A clothes washing machine including a cabinet having therein a spin tub rotatably disposed within a stationary drain tub, and an additive liquid dispensing system comprised of a multi-load reservoir of additive liquid connected hydraulically through a pum... | 04/16/1991 |
| 4893912 | Device for observing a hot reaction space in the interior of a reactor operating at increased pressure A tubular housing is provided at one end thereof with a protective glass prism facing an observation opening in a pressurized reactor. The other end of the housing is closed and the intermediate part thereof supports an inclined mirror. A viewing tubular ... | 01/16/1990 |
| 4809551 | Device for detecting the liquid level in a tank, particularly a lighter tank and tank provided with such device A device for detecting the liquid level in a tank. The device inlcudes a dioptric element having faces and a base immersible in the liquid. A bundle of optical fibers is operationally arranged with the dioptric element so that the dioptric element is disp... | 03/07/1989 |
| 4787329 | Device for detection of imminent gas depletion of a liquified gas tank and gas lighter equipped with this device The subject of the invention is a device for the detection of imminent gas depletion of a liquified gas tank, comprising a bundle of fiber optics (22), one end of which, forming an observation surface is visible from the outside of the tank, and other end... | 11/29/1988 |
| 4670660 | Optical liquid level indicator and method An optical liquid level sensor utilizing both a prismatic member for the light refraction when immersed in and surrounded by a liquid and its effects for the indication of the presence and absence, selectively, of the liquid level. This level indication i... | 06/02/1987 |
| 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 |
| 4620441 | Liquid level control A liquid level control responsive to the level of liquid in a vessel having visual verification of fluid level including a tubular body for attachment to an opening in a vessel, the body having aligned openings in opposite sides receiving a pivot shaft, a... | 11/04/1986 |
| 4606866 | Wettable devices operational with aqueous liquid and method therefor A humidifier (10) used in respiratory therapy is disclosed where the surface tension of a light probe (32) used therewith is maintained greater than the surface tension of the aqueous liquid used in the humidifier (10). Maintaining the surface tension of ... | 08/19/1986 |
| 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 |
| 4547916 | Magnetically actuated level indicator A level indicator for a portable toilet comprises a visible indicator on the exterior of the toilet's holding tank, a float mechanism on the tank's interior operable to sense the level of liquid material in the tank, and a magnetic coupling between the fl... | 10/22/1985 |
| 4489602 | Rod-like apparatus for determining the existing level of liquids in containers, channels, or the like A rod-like apparatus for determining the existing level of liquids in containers, channels or the like has a lightguide 1 to be arranged in a container and comprising a core of a transparent material with a first refractive index and also a transmitter 14... | 12/25/1984 |
| 4435094 | Thermometer scale magnifier A magnifying indicator for a thermometer or similar columnar instrument, said indicator consisting of a one-piece body of transparent plastic formed with a cylindrical base block and an upstanding lens on the front portion of the base block. Opposite the ... | 03/06/1984 |
| 4335167 | Brake fluid reservoir comprising polymethylpentene and 10-20% glass fibers An improved brake fluid reservoir is disclosed. The reservoir is made from polymethylpentene and includes 10-20% by weight glass fibers as an opacifying agent. A translucent reservoir is obtained which has the highly desirable feature of visibility of the... | 06/15/1982 |
| 4201086 | Viewing rod for determining the level of liquid within a receptacle A viewing rod in which a visual change in color at the transmitting end of the rod indicates that the level of the liquid within a receptacle has reached the transmitting end.... | 05/06/1980 |
| 4021943 | Pressing iron water level gauge In the preferred form, the present invention is directed to a water gauge which indicates the amount of water in the reservoir of a pressing iron. The gauge is so positioned with respect to the reservoir and the contents thereof that the indication functi... | 05/10/1977 |
| 3977908 | Indicator in use with a lead storage battery for indicating the overdischarge of the same and the lowered level of the electrolyte therein An indicator in use with a lead storage battery comprising a case and battery elements disposed in said case, said battery elements including electrolyte and a set of plates, said indicator adapted to indicate the overdischarge of said storage battery and... | 08/31/1976 |
