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"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 7821411 | Safety device for monitoring a conduit A noninvasive security device for detection of blocked fluid flow within a conduit includes clamping body that may be affixed to the conduit and a safety overflow circuit mounted to the clamping body. The safety overflow circuit includes first and second sensor pads... | 10/26/2010 |
| 7417552 | Flood alarm A flood alarm is disclosed. In an illustrative embodiment, the flood alarm includes a float assembly and a telephone system interface module connected to the float assembly. A method of indicating a flood in a structure is also disclosed. ... | 08/26/2008 |
| 7360545 | Dishwasher A dishwasher having an improved valve assembly is disclosed. The dishwasher includes a housing, a tub provided in the housing, an injector assembly for injecting water onto tableware positioned in the tub, and an inlet valve assembly. The inlet valve assembly includ... | 04/22/2008 |
| 7345589 | Concrete wetting alarm system At least one embodiment of the inventive technology claimed herein seeks to reduce the risk of the excessive admixing of water during a concrete wetting operation by providing a system that alerts, with at least one water flow indicator, at least one individual havi... | 03/18/2008 |
| 7336190 | Early detection and advanced warning “waste is backing up” apparatus and method A device for the early detection and advanced warning that waste is backing up in a waste pipe line comprising: a tubular body member having an open lower portion, a central hollow core extending axially there through, and a closed upper portion. The open lower port... | 02/26/2008 |
| 7334536 | Pop-up sewer backup indicator An improved sewer backup indicator. The sewer backup indicator is installed into a sewer cleanout cap housing which comprises a pop-up device that detects and holds the detection of a back up in the sewer system, which is due to number of reasons. This invention hel... | 02/26/2008 |
| 7322230 | Runoff rain gauge Disclosed is a runoff rain gauge 100 which includes a collector tube 104, soil infiltration resistance medium 108, a runoff resistance flow element 113, a standard rain gauge 102, and runoff collection tube 114. Precipitatio... | 01/29/2008 |
| 7307538 | Pump connector system A single pump control unit can be coupled to first and second float switches and a pump for purposes of removing fluid from a region such as a sump. A supplemental set of contacts can be provided to couple an alarm indicating signal to a remote alarm. An alarm state... | 12/11/2007 |
| 7265677 | External device indicating that a tank is filled up System for indicating when a tank is full. The system includes a signal and control box. A container is connected to the tank. The container has a base, a float, an upper portion, and a lower portion. An orifice is arranged at the upper portion of the container. The... | 09/04/2007 |
| 7221282 | Wireless wastewater system monitoring apparatus and method of use A wireless wastewater system monitoring apparatus generally comprising a processor/transceiver unit, housed within a synthetic protective enclosure formed outside of the wastewater system, and a fluid level sensor configured to send an overflow signal to the process... | 05/22/2007 |
| 7191649 | Water level sensor A liquid level sensor apparatus for monitoring the drain line of condensate from an air handler of a refrigeration system senses the presence of backup liquid in a vertical pipe in the drain system. A closure of the upper end of the pipe supports a magnetic switch a... | 03/20/2007 |
| 7171978 | Storage container for water-endangering liquids A storage container for water-endangering liquids that includes a leakage detection and restraint system. The container allows for a short-notice alarm system and minimizes the collection volume, to ensure that the water-endangering liquid spreads as little as possi... | 02/06/2007 |
| 7135981 | Fuel level variation detector for marine vehicle A signaling device for a marine vehicle having a fuel tank, a fuel level value detected in the fuel tank, and a blower to evacuate fuel fumes. The signaling device comprises: a fuel level variation detector; a refueling detector for detecting a fuel level variation ... | 11/14/2006 |
| 7079037 | System and method for indicating liquid level condition An indicator for displaying either low liquid level or satisfactory liquid level conditions within a tank includes a sensor for detecting the liquid level conditions, a photodetector for detecting an ambient dark condition, a pair of indicator lights for indicating ... | 07/18/2006 |
| 7066021 | Runoff rain gauge Disclosed is a runoff rain gauge 100 which includes a collector tube 104, soil infiltration resistance medium 108, a runoff resistance flow element 113, a standard rain gauge 102, and runoff collection tube 114. Precipitatio... | 06/27/2006 |
| 7057507 | Flood detection and alarm system A system for monitoring leaks in dwellings that includes a sensor which detects water flow. The system determines that a leak is occurring when water has flowed through a water line for longer than a preselected period of time. A central monitoring system receives a... | 06/06/2006 |
| 7053782 | Fuel overflow alarm system A fuel overflow alarm system sounds a buzzer or other alarm when a fuel level in a fuel tank of a vehicle or other machine approaches an overflow state, thereby alerting a user that fueling should be halted. The device is activated when a fuel cap or fuel cap cover ... | 05/30/2006 |
| 7042362 | Apparatus for monitoring leakage of process cooling water in furnace A method and an apparatus thereof for monitoring leakage of process cooling water (PCW) in a furnace. In the method, a bellows used to deliver the process cooling water is covered by a protecting tubing, so as to protect the bellows from being corroded by the proces... | 05/09/2006 |
| 7012536 | Retain overfill monitor with integrated over-vacuum and over-pressure detection A system for monitoring the conditions within the fuel storage compartments of a transport tank comprises an overfill pressure vacuum probe installed in each fuel storage compartment and which has a first sensor for detecting the presence of fuel at a predetermined ... | 03/14/2006 |
| 7009125 | Electrical fluid activated switch A linear slip to slip coupling has an input portion and an output portion with a common horizontal centerline. A fluid container has a threaded aperture. An adaptor has a threaded input end releasably coupled to the threaded aperture of the container. An unthreaded ... | 03/07/2006 |
| 6998990 | Auto shutoff overflow controller The automatic shutoff overflow controller comprises a circuit which engages between a source of power and a water processing device, the controller, sensing an undesirably high water level in a liquid containment into which water drains from the device, shutting off... | 02/14/2006 |
| 6950032 | Apparatus and method for protection against appliance leaking A water protection system apparatus for detecting and stopping a flow of water which includes a power supply, a water ionization switch, and a controlled valve assembly. The water ionization switch selectively conducts electricity when exposed to water and includes ... | 09/27/2005 |
| 6922150 | System for level gauging and providing alarms for a storage room using two gauging devices for determining a current level value Method and device for calculating the level of the surface of a product in a storage room by a radar level gauging system, which includes a first gauging device for calculating a first value of level and functionally separated from the first gauging device a second ... | 07/26/2005 |
| 6898499 | Control system A control system enables a considerable decrease in electric power consumption of backup power, leading to effective prevention of a dead battery, while data in each control unit which need be maintained even after power is turned off is properly maintained. An ECU ... | 05/24/2005 |
| 6828912 | Resonant tube sensor Resonant decay sensors that determine a parameter based on the decay of acoustic standing waves in a tube. Parameters that can be determined include temperature, pressure, the level of a material in the tube, and the height of a material above an end of the tube. Re... | 12/07/2004 |
| 6493593 | Electronic control unit An electronic control unit includes a first microprocessor monitoring the operation of a second microprocessor and has a monitoring operation blocking unit for preventing the second microprocessor from being reset by the first microprocessor while the sec... | 12/10/2002 |
| 6476723 | Insulating oil leak containment Insulating oil in electric power transmission devices such as a transformer is filtered for removal of accumulated water and carbon particles. The filter and circulation pump are usually located in a separate cabinet external to the transformer with circu... | 11/05/2002 |
| 6442955 | Condensate overflow safety switch A safety switch that can be used with an air handling system is disclosed. The air-cooling system includes a drain pan for collecting liquid condensed on the evaporator coils. The pan is fluidwise connected to a T- or L-shaped tubular structure, installab... | 09/03/2002 |
| 6335690 | Fluid sensing system A fluid sensing system for monitoring a fluid parameter within a fluid container includes a fluid sensor and a fluid receiver. The fluid sensor is positioned at a first location and is operable to sense the fluid parameter. The fluid receiver is positione... | 01/01/2002 |
| 6323774 | Portable excess water usage control and alarm system A monitor, shutoff control, and alarm for use with an inlet water supply obtained from a municipal water supply to prevent excessive usage of water due to leakage or human error, that includes a measuring means and shutoff valve connected to the inlet sup... | 11/27/2001 |
| 6218948 | Bilge sentry The invention is an oil-water detection device for monitoring the presence of water in a container. The device consists of a probe having two thin strips of sheeting within a fiberglass circuit board for sensing the presence of water in a container and ge... | 04/17/2001 |
| 6160486 | Service alarm monitor A system for visually indicating activation of an alarm, even if the alarm is no longer activated. The system has a moveable visual indicator having an elongated shaft with a stop at one end, the shaft extending through a guide mounted on the alarm. A mag... | 12/12/2000 |
| 6154144 | Auto shutoff overflow controller The Automatic Shutoff Overflow Controller comprises a circuit which engages between a source of power and a water processing device, the controller, sensing an undesirably high water level in the device, shutting off the device and producing an audible wa... | 11/28/2000 |
| 6040776 | Collection of process effluent Described herein is an alarm system for use with a `bag-in-box` arrangement (10) which is used to collect effluent from a processing apparatus (20). The alarm system comprises a chamber (50) located between the processing apparatus (20) and the `bag-in-bo... | 03/21/2000 |
| 5986597 | Fluid transfer controller with digital bitstream monitor A fail-safe fluid transfer control apparatus has full redundancy in the response to various inputs such as overfill probe signals, ground detection signals, and the like. Independent microprocessor controllers independently evaluate the inputs and each ou... | 11/16/1999 |
| 5969619 | Liquid level control system In order to control the delivery of a liquid to a vessel, a liquid level control system includes a regulated supply of low pressure air delivered to an air supply tube which extends to a liquid vessel for discharging the low pressure air at a preselected ... | 10/19/1999 |
| 5966311 | Method of overfill probe identification and control A fail-safe fluid transfer control apparatus has full redundancy in the response to various inputs such as overfill probe signals, ground detection signals, and the like. Independent microprocessor controllers independently evaluate the inputs and each ou... | 10/12/1999 |
| 5942698 | Detecting and measuring liquid flow in remote sewer structures In the particular embodiments described in the specification, a virtual sewer flow monitor detects flow rate and depth information periodically and supplies it to a scattergraph generator and a polynomial curve generator produces a polynomial curve corres... | 08/24/1999 |
| 5921094 | Methods and apparatus for sensing an excessive amount of collected condensed water in an air conditioner A method of sensing condensed water of an air conditioner which is driven by a compressor motor's operation through a motor driving portion, to heat-exchange the inside, comprises the steps of--sensing temperature by means of a temperature sensor mounted ... | 07/13/1999 |
| 5894611 | Waterproof bath water level audio alarm A diaphragm switch having a lower contact on the upper, interior, surface of a flexible membrane is pressed upward against an upper contact when the membrane is displaced upward by a rising water level. Closing of this diaphragm switch completes an electr... | 04/20/1999 |
