Abstract: An apparatus for measuring the level of at least one fluid includes an elongated transparent tubular member open at both ends, one of the ends being vertically insertable into the fluid to a reference point below the fluid surface to establish a column of the fluid in the tubular member having a length generally equal to the distance between the reference point and the fluid surface, a stiff tether slightly longer in length than the tubular member and threaded therethrough, a plug connected to one end of the tether for closing at least the inserted end of the tubular member prior to withdrawing it from the fluid to contain the column of the fluid in the tubular member for measurement after the tubular member is withdrawn from the fluid, and a grip connected to the other end of the cable for remotely controlling the plug to close the inserted end of the tubular member.

Abstract: The invention is related to a reservoir tank receiving liquid therein and having a peep hole in a side wall for visually inspecting the interior of the tank. The peep hole is formed by a cup-shaped member having a transparent bottom wall, a cylindrical side wall sealingly fitted into an opening formed in the side wall of the reservoir tank, and a plurality of retaining portions formed adjacent the open end portion of the cup-shaped member for engagement with the peripheral edge of the opening.

Abstract: 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 fluid level in the reservoir without providing a clear view of the fluid.

Abstract: A method and apparatus for visually monitoring the fluidized bed of a resin ion exchanger. The method includes establishing a sample fluidized bed displaced from, but in fluid communication with, the resin ion exchanger fluidized bed and supplying a quantity of exchanger process solution in a controlled manner to the sample fluidized bed such that the sample fluidized bed represents among other exchanger fluidized bed characteristics the exchanger fluidized bed height. The apparatus includes a monitor having a transparent sampling column in fluid communication with the exchanger fluidized bed and a regulator in fluid communication with the exchanger and the sample column for establishing a solution sample for supply to the sample fluidized bed. The regulator includes an orifice for controlling the flow rate of solution sample supplied to the sample fluidized bed.

Abstract: PCT No. PCT/SE78/00011 Sec. 371 Date Feb. 28, 1979 Sec. 102(e) Date Feb. 13, 1979 PCT Filed June 30, 1978 PCT Pub. No. WO 79/00019 PCT Pub. Date Jan. 11, 1979An apparatus for metering liquids into ungraduated dosage vessels. The dosage vessel has bottom and side walls defining an upper mouth, at least a portion of one side wall being substantially vertical, transparent and arranged for coaction with a graduated scale, placed outside said portion. The scale is separated from the outside of the vessel portion by an air gap, whereby light rays from the scale graduations pass through the interface at the inner surface of the vessel wall when it is empty, so that the graduations are visible from the mouth of the vessel, whereas said rays are totally internally reflected when the vessel is filled with liquid above the graduation mark in question, since the liquid has a greater refraction index than air, the graduation mark thus being no longer visible from the mouth of the vessel.

Abstract: Disclosed is a sightglass assembly of particular application for use with a laser flowmeter to measure flow velocities of high pressure fluid flowing through a tube. A short, thick-walled glass tube having spherically rounded ends is coaxially interposed in a fluid flow system such that a continuous cylindrical fluid flow passage is provided through the bore of the sightglass tube. The sightglass tube is longitudinally clamped between a pair of endpieces having fluid flow bores. Spherical receiving surfaces in the endpieces are mated with the spherical ends of the sightglass tube to seal the joints between the sightglass and the endpieces and to pre-stress the sightglass tube with radially inward stress components enabling it to withstand higher internal fluid pressures. A pair of flat viewports on opposite sides of the sightglass tube provide windows for passage of laser light through the fluid medium in a direction transverse to the direction of flow.

Abstract: A cooler and level indicator for beer kegs comprising an insulated container for holding iced water in contact with a keg of beer, an insulated cover for sealing the container and an externally readable level gauge for indicating the iced water level, said level being proportional to the amount of beer remaining in the keg after the keg becomes buoyant.

Abstract: In a reservoir comprising a container for liquid at least one portion of the top wall of the container is depressed to form a window, the depressed portion and at least a part of the surrounding area being transparent or translucent so that the reservoir can be filled with a liquid until the liquid is in visible contact on the under surface of the window with the surrounding part untouched.

Abstract: A sight-glass adapter which may be provided in the form of a separate kit for use with existing sight-glass arrangements as currently in use with tanks and other vessels. The adapter unit of this kit provides all of the necessary elements for connection between the existing valves and the existing sight glass in order to properly hold the sight glass in a manner which will permit easy and quick access to the interior thereof for the purpose of cleaning same. The adapter includes a main body element having a threaded projection at one end thereof for receiving a sight-glass retaining nut thereon together with appropriate rubber seal and metal washer structure. The other end of the main body member has a removable screw plug for permitting quick access to the interior of the member as well as the interior of the sight glass itself.

Abstract: A novel process and apparatus are disclosed which permit an air-stream interface to be maintained in a continuous vulcanization cable production process in order to enable accurate optical measurements of the cable to be taken at all times. Specifically, a baffle assembly is provided in conjunction with a high pressure, high temperature steam supply and a high pressure air supply to maintain a clear air region in a steam vulcanization chamber. The baffle assembly together with interconnected air and steam supply lines and an exhaust line provides a flow pattern which permits an optical window within the clear air region to be maintained in a clear and unobstructed state so that optical measurements can be continuously conducted while the vulcanization process is in operation.

Abstract: A liquid level indicator for a container such as a beer keg or the like in which a supply of liquid is maintained under pressure from an associated source of pressurized gas and having an outlet arranged to be connected to a dispensing conduit for conducting the liquid from the container to the point of use at a remote location, which includes a gauge tube of transparent material having a check valve therein, the upper end of the gauge tube and the container communicating with the associated source of pressurized gas for normally maintaining the check valve in the closed condition and for pressurizing the liquid in the container, the lower end of the gauge tube communicating with the dispensing conduit to thereby establish liquid communication between the container and the gauge tube so that the level of liquid in the gauge tube continously corresponds to the level of liquid in the container while the check valve in the gauge tube maintains liquid in the gauge tube during the dispensing of the liquid from the