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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 7509753 | Apparatus for indicating oil temperature and oil level within an oil reservoir A dipstick that measures and externally indicates the temperature and level of a fluid within a fluid reservoir. For example, in one embodiment the dipstick measures and externally indicates the oil temperature and oil level of oil within an oil reservoir of a motor... | 03/31/2009 |
| 7336082 | Vehicle circuit tester A vehicle circuit tester for electrically testing the circuit system of a trailer. The tester can connect to a variety of types of trailers for the purpose of analyzing or monitoring the trailer's circuit system. The tester includes indicators that indicate continui... | 02/26/2008 |
| 6508120 | Fluid level monitor with at least partially submersible buoyant element This invention discloses a fluid level monitor including a buoyant element suspended from a filament wound on a spool, a load sensor that senses a tensile force in the filament and a rotation sensor that senses the rotation of the spool around which the f... | 01/21/2003 |
| 5546672 | Magnetic mark detection A method and apparatus for detecting magnetic marks on a wireline logging cable and for more accurately making depth measurements during logging is described. The method uses depth-based, rather than time-based, samples and calculations. A Hall Effect sen... | 08/20/1996 |
| 5395065 | Fishline length measuring device for fishing reel A fishline length measuring device adapted to a fishing reel having a spool rotatably supported on a reel body for winding and unwinding a fishline thereon. The device has a spool rotation sensor for detecting a direction of the rotation of the spool and ... | 03/07/1995 |
| 5363565 | Fishing line length measuring device for fishing reels A fishing line length measuring device to determine the let out or wound up amount of the fishing line based on the number of spool revolutions. The device has a reel, a spool rotatably supported by the reel where the fishing line is wound up, a sensor to... | 11/15/1994 |
| 5309647 | Fiber optic cable footage indicator An apparatus for measuring the length of fiber optic cable being deployed om a winch to an underwater environment. The cable deployment measuring apparatus of the present invention comprises a constant current generator for generating a direct current, a ... | 05/10/1994 |
| 5243860 | Liquid level measurement The invention relates to apparatus (1) for monitoring the level of a liquid within a vessel (3). The apparatus comprises a surface following sensing head (5) adapted to follow the surface (7) of the liquid. A gauging head (9) is mounted outside the vessel... | 09/14/1993 |
| 5243128 | Sewer cleaning apparatus A mobile sewer cleaning apparatus having a rotating drum and a flexible hose wound thereon. Preferably mounted on the sewer cleaning apparatus is a device for measuring the length of hose paid out from the drum. The measuring device may be used, among oth... | 09/07/1993 |
| 5166589 | Level probe for a shaft furnace A probe includes a probe foot which is suspended on a cable or a chain attached to a winding drum mounted in a sealed casing above the furnace and which communicates with the interior of the latter via a vertical sleeve passing through the upper wall of t... | 11/24/1992 |
| 5131165 | Computerized depth calculator A depth calculating device is provided wherein the exact depth of a fisherman's bait presentation is calculated while that fisherman is trolling. The invention utilizes an electronic sensing device which determines the deflection of the fishing line away ... | 07/21/1992 |
| 5058288 | Plumb bob device for determining the bed height of bulk material in a shaft furnace The present invention pertains to a plumb bob device for determining the bed height of bulk material in a shaft furnace. The winding drum 1 for unwidning and rewinding a cable 5 or a chain with a plumb bob 6 suspended at its end is driven by a hydraulic m... | 10/22/1991 |
| 4697758 | Fishing reel with microcomputer A fishing reel having a rotatable spool for winding thereon a fishing line, a Hall-effect sensor for detecting the spool rotation, and a microcomputer including an up/down counter for receiving signals from the sensor to count the number of spool revoluti... | 10/06/1987 |
| 4326337 | Measuring instrument for the profile of piled charge of a blast furnace An apparatus for measuring the piling profile of a blast furnace charge is disclosed. The apparatus includes a guide pipe having a distal end extending into the furnace. Means are provided for moving the guide pipe radially into and out of the furnace and... | 04/27/1982 |
| 4279078 | Fluid presence detector A fluid level indicator circuit is used in cooperation with a probe attached to a long wire where the probe has first and second electrodes for contacting the surface of the fluid and leads communicating to the indicator circuit. The water level indicator... | 07/21/1981 |
| 4244219 | Liquid-level meter A liquid level meter having a first and second rotatable shaft mounted within a housing coaxially one within the other and coupled for relative rotation. A drum is mounted on one shaft and has a float suspended therefrom, for engagement with the liquid. D... | 01/13/1981 |
| 4219133 | Storage level monitor The storage level of ore, supplied by an overhead loader to a bin or pile in the form of large, dense, hard fragments, up to a foot or more in diameter, is measured and controlled by repetitively lowering a line carrying a weight, having a mass at least a... | 08/26/1980 |
| 4155167 | Dipstick guide A dipstick guide for a dipstick measuring the level of oil in the crankcase of an engine wherein a housing has an enlarged funnel like opening and is attached to the dipstick supporting tube. The arrangement includes a guide element which is positioned to... | 05/22/1979 |
| 4123753 | Ullage measuring device An ullage measuring device and an accurate method of using an ullage tape to find the surface of a liquid in a tank without visual sighting. The ullage device includes a composite tape formed of a tape from which readings of ullage may be obtained and ele... | 10/31/1978 |
| 4052612 | Analog-to-digital encoder unit employing a pre-encoded film with improved film tensioning means An optical encoder for use with a liquid level measuring device including a pre-encoded film strip bidirectionally translatable between a pair of film reels past a detection station. The film is driven by a sprocket coupled to the spring motor of a perfor... | 10/04/1977 |
| 4026151 | Measuring device for water flow in a buried pipe A measuring device to determine the depth of sediment in the floor of a buried pipe and the rate of flow of water through the pipe. The device includes a first shaft with a sleeve telescoped on the shaft with the lower end of the shaft being adapted to en... | 05/31/1977 |
| 3975633 | Analog to digital encoder unit employing a pre-encoded film An optical encoder unit for generating digital electrical signals defining the absolute level of a liquid in a tank from the translational position of a perforated tape in a conventional liquid level gauge and providing both local and remote readout. A pr... | 08/17/1976 |
| 3935741 | Level sensor A storage tank liquid level sensor for indicating levels of two immiscible liquids in the tank wherein a first magnet is carried by a float on top of one liquid and a second magnet is carried by a float on top of the other liquid, the first magnet operati... | 02/03/1976 |
