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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 7339384 | System and method for sensing capacitance change of a capacitive sensor The present invention relates to systems and methods for sensing capacitance change of a capacitive sensor and for optimizing a capacitive sensing circuit. In an exemplary embodiment, a capacitive sensor may be coupled to an amplifier at floating node. A programming... | 03/04/2008 |
| 7319401 | Radar level gauge system with variable alarm limits A radar level gauge system for determining the filling level of a filling material in a tank is disclosed. The system comprises a transmitter for transmitting measuring signals towards the surface of the filling material; a receiver for receiving echo signals from t... | 01/15/2008 |
| 7305192 | Cartridge for use in an image forming apparatus having an electronic element A cartridge for use in an image forming apparatus comprises a charge roller to which a predetermined voltage is applied; a photosensitive drum charged by the charge roller by rotating in contact with the charge roller; an electronic element for wireless communicatio... | 12/04/2007 |
| 7245059 | Method of exciting a piezoelectric crystal The invention describes the use of an electrical pulse that is a single square wave to excite a piezoelectric crystal. This pulse is applied alternately to either side of the crystal at twice the nominal resonant frequency of the crystal. This method provides a sign... | 07/17/2007 |
| 7018290 | Grain tank cover for an agricultural harvester A grain tank of an agricultural harvester having a top formed with an opening is provided. A cover overlies the opening, and a lifting mechanism is provided for raising the cover to an elevated position. Side panels extend between the cover and the top of the grain ... | 03/28/2006 |
| 6938475 | Device for establishing and/or monitoring a predetermined fill level in a container A device for establishing and/or monitoring a predetermined fill level in a container is provided, which also operates stably in liquids with surface waves, which includes: a mechanical oscillatory structure placed at the height of the predetermined fill level, an e... | 09/06/2005 |
| 6696962 | Resonant tube level sensor Acoustic level sensing by creating, or failing to create, resonance in a tube having a free end. An acoustic transducer at one end of the tube injects sound at a frequency that could produce resonance, depending on whether the free end is open or closed. ... | 02/24/2004 |
| 6696966 | Automatic salt level monitor for a water softening device The present invention provides an automatic monitor for use in a tank with a water soluble softening agent. The monitor includes a signal emitter that produces a signal capable of being detected by an array of signal-detecting sensors. The sensors are dis... | 02/24/2004 |
| 6696965 | Rotary paddle bin monitor A rotary paddle bin monitor for indicating a level of dry bulk material in a bin. In normal operation, a rotary motor rotates a shaft and paddle. A spring mechanism keeps the motor in a first angular position when the paddle is rotating freely. However, w... | 02/24/2004 |
| 6588270 | Filling level indicator for a washer fluid container Filling level indicators for washer fluid containers in motor vehicles have hitherto been arranged directly on the washer fluid container or been integrated in the instrument cluster on the motor vehicle. Despite the available information, the filling of ... | 07/08/2003 |
| 6192751 | Non-invasive low frequency elastic wave fluid level sensing system for sludge laden environments A non-invasive elastic wave fluid level sensing system for use in sludge laden environments, including transmitting and receiving transducers mounted on an outer face of a wall of a container for a fluid and along a propagation path for an elastic wave tr... | 02/27/2001 |
| 6192693 | Ice system having sensor pocket An ice collection bin includes an exterior surface and an interior surface defining an interior chamber used to collect ice or other frozen particles. The level of frozen particles in the interior chamber is controlled by a level sensor assembly. Sensor p... | 02/27/2001 |
| 5689265 | Device for measuring a level of material using microwaves A level measuring device using microwaves comprises an antenna for sending transmitted waves toward the surface of a material whose level is to be measured, and for the reception of echo waves resulting from reflection at the surface, and a receiving and ... | 11/18/1997 |
| 5644299 | Ultrasonic material level measurement Apparatus for indicating material level that includes a pair of ultrasonic transducers on opposed sides of a space for receiving the material at the level to be detected. A swept frequency oscillator is coupled to one of the transducers so that the transd... | 07/01/1997 |
| 5575316 | Device for automatic filling of containers A device for automatic filling of a mobile container (4) with a material stream (13) from a harvester (1) moving alongside a discharge knee/discharge pipe which is controllably pivotable around a vertical and/or horizontal axis, with a pivotable discharge... | 11/19/1996 |
| 5557368 | Toner level detecting device and method for detecting toner level within a toner storage box A toner level detecting device on a toner supply box includes first and second light transmissive toner detecting portions connected by a connecting portion. An aperture between the first and second toner detecting portions is filled with toner when the t... | 09/17/1996 |
| 5499077 | Toner level detecting device A toner level detecting device on a toner supply box includes first and second light transmissive toner detecting portions connected by a connecting portion. An aperture between the first and second toner detecting portions is filled with toner when the t... | 03/12/1996 |
| 5363087 | Apparatus for providing a regenerant solution to a regenerable liquid treatment medium bed A liquid treatment apparatus or system having a liquid treatment medium bed which is regenerated by passing through it a solution formed by dissolving a solid in a liquid. An automatic control system initiates a regeneration cycle when necessary. Indicia ... | 11/08/1994 |
| 5337289 | Phased-array ultrasonic surface contour mapping system and method for solids hoppers and the like A real time ultrasonic surface contour mapping system is provided including a digitally controlled phased-array of transmitter/receiver (T/R) elements located in a fixed position above the surface to be mapped. The surface is divided into a predetermined ... | 08/09/1994 |
| 5223819 | Material level indicating apparatus with status light and external test features Apparatus for indicating level of material in a vessel that includes a probe for placement in the vessel at a position corresponding to a desired height at which material level is to be detected. Electronic circuitry is coupled to the probe, and is respon... | 06/29/1993 |
| 5216462 | Toner residual amount detecting mechanism A toner residual amount detecting mechanism comprises a stirring device and a photosensor. The photosensor has a protrusion, and rotates together with a stirring shaft while the protrusion contacts with a pin planted on the stirring shaft. The stirring de... | 06/01/1993 |
| 5147531 | Salt level monitoring device for water softeners A salt level monitoring device for water softeners including a weight for placement upon the salt mass; a drop line connected to the weight at one end and a sensor at the opposing, upper end; and a support member for supporting the sensor and drop line ov... | 09/15/1992 |
| 5132669 | Level sensor with alarm An alarm system for use in a salt-brine tank of a water softener has a sensor including a stem member having a lower end received in the bed of salt within the salt-brine tank and an upper end projecting above the bed of salt. An spaced pair of electrodes... | 07/21/1992 |
| 5048333 | Material level checking apparatus for use in a rotating member An apparatus and method for determining the level of material within a rotating cylindrical vessel are disclosed in which a rigid member means on the interior of the rotating vessel is fixedly secured to a rod having a longitudinal axis parallel to the ro... | 09/17/1991 |
| 5036358 | Image-forming apparatus and a method for a detecting developer amount therein An image-forming apparatus includes: a photosensitive member; a developing device; a developer accommodating device for accommodating the developer to be supplied to the developing device, the accommodating device having a housing of which a first and sec... | 07/30/1991 |
| 5015995 | Fluid level monitor A fluid level monitor for monitoring the fluid level in a tank comprises a first pair of transducers arranged in a vertically upper horizontal plane and a second pair of transducers arranged in a vertically lower horizontal plane. Pulse generators send el... | 05/14/1991 |
| 5002102 | Apparatus for detecting the fill level in a fiber storing device A fiber storing device includes an inlet for charging the device with fiber material and an outlet for withdrawing fiber material therefrom. The fiber storing device is associated with an apparatus for determining the fill level of fiber material in the s... | 03/26/1991 |
| 4966008 | Arrangement of ice fullness detector in ice making machine Disclosed is an arrangement of an ice fullness detector within an ice making machine composed of an ice making unit and an ice reservoir upon which the ice making unit can be separably stacked, wherein ice cakes formed within the ice making unit are disch... | 10/30/1990 |
| 4807672 | Empty-full indicator for solids tanks and blenders A method for controlling the filling status of particulate solids in a solids container is provided using an apparatus comprising an empty/full indication device comprising a conduit structure, having a vertically opened upper end and a vertically opened ... | 02/28/1989 |
| 4695685 | Rotating paddle bin level indicator Apparatus for indicating the level of flowable material in a storage bin comprising a motor mounted within a protective enclosure and coupled by a shaft to a paddle disposed within the bin to engage material contained therein. When the material reaches th... | 09/22/1987 |
| 4662182 | Ice storage detector for an auger type ice product making device An ice product storage detector which instantaneously detects when the ice products have filled the reservoir to its full capacity or when the amount of ice product in storage has decreased. The ice product storage detector includes a proximity switch pro... | 05/05/1987 |
| 4661663 | Tilt switch A novel suspended tilt switch method and apparatus for use in transporting bulk material and including a switch assembly having a plurality of parallel connected, position sensitive switch elements mounted in a predetermined configuration to provide norma... | 04/28/1987 |
| 4614477 | Apparatus and method for monitoring and controlling the volumetric loading of a truck body The invention provides an apparatus and method for monitoring the volume of material loaded into a truck body. Apparatus is provided for sensing the volume of material held in the truck body and indicating, visually or audibly, when a predetermined volume... | 09/30/1986 |
| 4610147 | Ice detector for an ice making machine An ice detector for an ice making machine which includes an ice storage switch main body mounted to an inner ceiling wall of an ice reservoir and including a detecting switch, an ice product detecting lever pivotally mounted to a supporting shaft of main ... | 09/09/1986 |
| 4551663 | Level control device A level control device is disclosed comprising a paddle on a rotary shaft projecting from a housing, a carrier disc coupled to the shaft and supporting a plurality of torque-transmitting levers having first arms engageable by drive pins or an apertured dr... | 11/05/1985 |
| 4506804 | Volume detecting device A volume detector for detecting the volume of powdery material in a container includes a roller having a fin and rotatably provided in the container for generating a periodic wavy motion of the powdery material so as to cause at least a portion of the pow... | 03/26/1985 |
| 4503424 | Protected sensor for granular materials An apparatus for detecting the presence of granular material at a predetermined location in conduit adapted to contain the flow of granular material and in containers adapted to store granular material, wherein the upper portion of a sensing terminal is e... | 03/05/1985 |
| 4476460 | Self-test circuit for multi-point level indicator An apparatus is provided for monitoring and indicating the amount of material in a hopper or a bin includes self-test circuitry for automatically testing both a material level sensor and circuitry for storing the output signal generated by the sensor. Dur... | 10/09/1984 |
| 4437090 | Apparatus for indicating creosote buildup in a chimney In order to provide an indication of the extent to which creosote has built up in a chimney, an accumulator on which creosote will also build up is held suspended in a chimney in a zone where a major creosote buildup is anticipated. The accumulator is so ... | 03/13/1984 |
| 4426851 | Ice maker diagnostic system A diagnostic system for identifying certain disabling abnormal conditions in an ice maker. The system includes a display panel having a pair of indicator lights and a push button switch, which when used together with a legend enables the operator to deter... | 01/24/1984 |
