Did You Know...
...that the Eveready Battery began as an invention called the "electric flowerpot," which was a tube with a battery and light bulb inside? The idea was to fasten this gizmo to the side of a flowerpot so it would illuminate the flowers from the bottom. The idea died on the vine and the businessman who licensed the flower pot, Conrad Huber, was left with a pile of useless tubes -- until he found a way to market them as batteries to light the world!
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| Number | Title | Issue Date |
| 8069724 | Filling level indicator having an explosion-proof housing Filling level indicator having an explosion-proof housing comprising a glass and a metallic frame, wherein the glass is fused into the frame. ... | 12/06/2011 |
| 7314237 | Pipe joint assembly A pipe joint assembly including a transparent quill; an outer quill having at least a first view port, and having at least a first outwardly extending pipe coupling thread which extends longitudinally along and helically about the outer quill, the transparent quill ... | 01/01/2008 |
| 7258006 | Sight gauge shield and method A one-piece molded polymeric sight gauge shield with internal cylindrical bore and method for making same are disclosed, along with a liquid-containing urn including same. The shield is molded by mating first and second mold portions about first and second spaced-ap... | 08/21/2007 |
| 7219031 | Rumble strip responsive systems: discrimination of types of rumble strips There are basically two types of rumble strips: shoulder/center rumble strips and in-lane rumble strips. In an embodiment of the invention, there is a device that automatically identifies the type of rumble strip with which a vehicle tire is in contact with. The dev... | 05/15/2007 |
| 7152468 | Illuminated rain gauge An illuminated rain gauge comprising an elongated, transparent collection vessel or tube having upper and lower ends with the lower end thereof being closed by a plug and which has a funnel-shaped collector at the upper end thereof. A support is positioned within th... | 12/26/2006 |
| 7089889 | Generator having a plastic frame A generator having a plastic frame. The frame includes plastic panels surrounding the engine and alternator assembly for the generator, providing an enclosure for the engine and alternator assembly and permitting additional features to be added to the frame without ... | 08/15/2006 |
| 7000468 | Electronic level gauge Disclosed is a fluid level gauge for sensing the level of fluid in a dispenser. The level gauge includes an inlet port communicating with the fluid and a check valve in communication with the inlet port. The check valve includes a membrane which allows air to pass. ... | 02/21/2006 |
| 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 |
| 6758092 | Fluid level verification apparatus An improved fluid level verification apparatus for use on liquid filled containers and configured to reduce inherent mechanical stresses on the inspection tube and resist leakage due to environmental, chemical, thermal or mechanical expansion cycles by using a prote... | 07/06/2004 |
| 6698284 | Liquid level gauge A gauge includes a translucent tube assembly having metallic tubular end segments. The end segments are endwise embedded within the ends of the translucent tube and permit dispensing with packing when joined to shut off valves at the ends of the tube asse... | 03/02/2004 |
| 6588272 | Redundant level measuring system A redundant level measuring system comprises a chamber for fluidic coupling to a process vessel whereby material level in the vessel equalizes with material level in the chamber. A float including a magnet in the chamber rises and falls with material leve... | 07/08/2003 |
| 6359742 | Weldable sightglass assembly The invention provides a sightglass assembly for viewing the interior of a vessel, such as a reaction vessel for chemical or biochemical reactions, and is adapted to be welded to a vessel wall. The sightglass assembly comprises a window disc fused to a me... | 03/19/2002 |
| 6336363 | Water level and measuring apparatus A water based level measuring system including a water containing container with a base portion, a bottom and an upright defining chamber for containing water. The water containing chamber has a lower portion with an access opening communicating with the ... | 01/08/2002 |
| 6282952 | Shield for a sight gauge A sight gauge assembly for an urn sight gauge includes an elongated extruded sight gauge shield. The shield has a longitudinal axis and a generally U-shaped cross section defining the shield to have a sight gauge receiving recess extending along its entir... | 09/04/2001 |
| 6234018 | Safety liquid level sight gauge A safety liquid level sight gauge with a transparent sight tube coaxially disposed between mounting blocks and concentrically within a transparent shield tube which is protected by a metal sleeve with a sliding inspection window for observing the liquid l... | 05/22/2001 |
| 5735168 | Animal feeder sight glass device The present invention is directed to an animal feeder sight glass device. The device is a single multi-layered component made of a foam gasket with a central opening which seats on a vessel having an outer wall with an opening in the wall, a transparent l... | 04/07/1998 |
| 5645011 | Fluid flow indicator A fluid flow indicator is presented particularly for use within an existing gasoline pumping apparatus. The fluid flow indicator includes an outer cage member, a first hollow transparent cylindrical member contained within the outer cage member, and a sec... | 07/08/1997 |
| 5628231 | Sight glass construction An improved sight glass for use in determining the level of water in steam boilers and similar installations is disclosed. The end flanges are provided with molded inserts, preferably of PTFE or similar fluorocarbon material which serves to provide a seal... | 05/13/1997 |
| 5323653 | Fluid level detection apparatus A fluid level detection apparatus including a support member; first and second end blocks which are slidably engageable with the support member and which each have a passageway; a seal borne by each of the end blocks and disposed in each of the passageway... | 06/28/1994 |
| 5125269 | Sight glass A sight glass includes a solid acrylic ring-shaped body with a glass tubular liner mounted to the interior cylindrical surface of the body with a fuel and fuel-additive resistant sealant. The liner has a diameter slightly less than the interior diameter o... | 06/30/1992 |
| 5105664 | Glass oiler and plastic sump jug shields The present invention of an opaque dirt shield for covering transparent portions of a sight container includes an obverse cover, a reverse cover, a fastener and viewing flaps. The covers are generally conformal with the shape of the container. The covers ... | 04/21/1992 |
| 5052224 | Shielded sight gauge for storage tanks A vertically mountable sight gauge is comprised of one or more serially connectable sections for visually determining the level or the volume, or both, of liquid stored in a container. Each section has an upper and lower housing. Each housing has a passag... | 10/01/1991 |
| 4888990 | Sight glass apparatus A sight glass apparatus and method limiting external pressures on the sight glass. The sight glass apparatus has a pair of flanges wherein each of the flanges includes a tubular top portion which abuts the respective pipes. The tubular top portion include... | 12/26/1989 |
| 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 |
| 4561305 | Liquid sight gage cover A liquid level sight gage has an elongated chamber block with a liquid chamber, a lens covering the liquid chamber, and a cover with an elongated viewing slot secured to the block with the lens interposed therebetween. Side beams of the cover, through whi... | 12/31/1985 |
| 4440028 | Protective shield for flow meter sight glass A protective shield for the sight glass of a flow meter. The flow meter includes an elongated guard having a slot that houses a sight glass, and a flow indicator carried by a float moves vertically within the sight glass and the fluid flow is read on a sc... | 04/03/1984 |
| 4162826 | Sight glass assembly and method for its production A high impact sight glass assembly and production method are described, in which the glass lens is fused into an enamel coated metal ring such that the glass lens is fused to the enamel coating and the entire glass area is under compression. The glass len... | 07/31/1979 |
| 4022062 | Gauge glass shield The specification and drawings disclose a gauge glass assembly including a gauge glass protected by a tubular shield including means for permitting visual observation of the gauge glass. The gauge glass is positioned in a cylindrical receptor which is in ... | 05/10/1977 |
