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| Number | Title | Issue Date |
| 7260496 | Pressure detector and method of diagnosing blockage of impulse lines A pressure detector for detecting a high side pressure from a high pressure side impulse line and a low side pressure from a low pressure side impulse line includes a high side pressure variance calculating section for calculating a high side pressure variance from ... | 08/21/2007 |
| 7253743 | Techniques for identifying when to change an air filter A method is performed in an electronic system having (i) hardware configured to perform electronic operations and (ii) an air filter configured to remove contamination from an air stream that cools the hardware. The method, which identifies when to change an air fil... | 08/07/2007 |
| 7152615 | Earthquake actuated horizontal valve with micro switch An earthquake actuated device includes a flapper-valve adapted to block a gas flow and a micro switch for closing or opening a circuit. A seismic sensor responds to accelerations characteristic of an earthquake. The sensor cooperates with a magnet in a flapper arm t... | 12/26/2006 |
| 7111675 | Remote closed system hydraulic actuator system A hydraulic actuator system includes a power source, a controller in communication with the power source, a piezoelectric stack comprising a plurality of piezoelectric elements disposed within a sleeve to define a chamber at one end of the sleeve, pressure accumulat... | 09/26/2006 |
| 6992579 | Burglar alarm system having reduced wiring Normal hard-wired domestic burglar alarms have cables with six conductors extending between the alarm controller and each remote input/output device (such as an entry keypad). The present alarm system has an alarm controller, a remote input/output device, a cable ex... | 01/31/2006 |
| 6926821 | Water treatment device with volumetric and time monitoring features A totalization meter system for a water treatment device, the device having an inlet aperture and an outlet aperture, and a channel for channeling water between the inlet and outlet apertures. A flow reactive device is positioned in the channel and is exposed to the... | 08/09/2005 |
| 6917003 | Switch for vehicle A switch is used to detect opening/closing of a car door or the like in a vehicle, and the switch can be provided with a nice operation feeling and stable performance. Thin corrugated sections are provided on a cover that covers a switching-element, connection point... | 07/12/2005 |
| 6860988 | Fluid filtration system with fluid flow meter A water filtration system incorporating a fluid flow meter has a modular turbine casing assembly in which a turbine is located between upstream and downstream casing elements of identical shape and formed to be stacked so as to trap the turbine in between. The turbi... | 03/01/2005 |
| 6688532 | Controller, temperature controller and heat processor using same A controller controls a physical variable such as temperature of a controlled system. A variable calculator calculates and output a manipulated variable on the controlled system based on of a target value such as a target temperature and a feedback value ... | 02/10/2004 |
| 6441744 | Regulator diagnostics system and method Apparatus for performing diagnostics through a regulator is disclosed. The pressure regulator is disposed in a fluid flow passage and has a throttling element moveable in the flow passage. A stem is attached to the throttling element. The apparatus includ... | 08/27/2002 |
| 6331820 | Explosion proof water flow detector A paddle type flow detector for an explosive environment is mountable onto a pipe. The detector includes a structure for mounting to a pipe, a substantially sealed switch housing containing an electrical switch, and a paddle located within the pipe. A lev... | 12/18/2001 |
| 6121884 | Gas flow detector A gas flow detector (10) includes a casing (12) with an inlet (14) for connection to a gas source and an outlet (16) for connection to a gas using appliance. Between the inlet and outlet there is an internal chamber (18) which receives a sleeve (24). Gas ... | 09/19/2000 |
| 6114823 | Circuit and apparatus for sensing fluid flow A circuit and apparatus for magnetically sensing fluid flow through a conduit. The circuit includes a sensor and a sensor magnet for biasing the sensor in an on condition. A second magnet indicative of the relative position of a conduit valve substantiall... | 09/05/2000 |
| 6052058 | Filter integrity monitoring system A method and system for monitoring integrity of a filter (25) of a smoke or fire detector system. The system has a detector chamber (14) into which light is passed from a light source incorporated into a light source control circuit (10). Scattered light ... | 04/18/2000 |
| 5898375 | Siphon alarm and restarting mechanism The invention includes a system for monitoring the performance of an automatic dosing siphon utilized in reservoir which is a part of a wastewater treatment system. The siphon includes a bell type cover, a fluid trap having one leg extending upward into t... | 04/27/1999 |
| 5798697 | Exhaust/supply direction indicator An apparatus for detecting the flow direction of a fluid from an apparatus or between two apparatuses such as a biohoods, fume cabinets, or filters. The device includes a conduit horizontal plane and adapted to receive the fluid. A detecting element is di... | 08/25/1998 |
| 5650564 | Fluid drip detection system A fluid drip detection system which is not prone to false alarms caused by the presence of dirt or solid particle contaminants in the fluid. The fluid drip detector comprises; a conducting hollow housing for permitting fluid flow and passage therethrough,... | 07/22/1997 |
| 5631634 | Flow and pressure sensor A pressure sensor assembly includes a disk entirely of metal and having a plurality of circumferentially spaced petals, separated by a plurality of radially extending slots. The slots extend from the periphery of the disk to a position near the center. Ho... | 05/20/1997 |
| 5583490 | Rupture disk monitoring apparatus A monitoring apparatus for monitoring the condition of a pressure relief rupture disk disposed in a pressure relief conduit is disclosed. The monitoring apparatus includes an electrically conductive rupture disk circuit, spaced apart electrodes affixed to... | 12/10/1996 |
| 5410298 | Fluid flow direction detector An apparatus for detecting the flow direction of a fluid between two enclosed spaces, such as hospital rooms, includes a conduit extending along a horizontal plane and adapted to receive the fluid. A detecting element is disposed within the conduit and mo... | 04/25/1995 |
| 5291182 | Fluid flow direction detector An apparatus for detecting the flow direction of a fluid between two enclosed spaces, such as hospital rooms, includes a conduit extending along a horizontal plane and adapted to receive the fluid. A detecting element is disposed within the conduit and mo... | 03/01/1994 |
| 5183983 | Flow switch assembly for fluid flow monitoring A basic housing for a fluid flow monitoring assembly comprising a sensing leakproof elongate hollow body formed from a non-magnetic, metallic material and pivotally mounting internally of same a vane assembly that at one end includes a vane adapted to be ... | 02/02/1993 |
| 5091612 | Magnetically actuated proximity flow switch A flow switch adapted to be attached to a pipe is designed to trip a switch at a preset flow rate. The switch employs a bending metal blade which deflects in the flow stream to move a magnet attached to the downstream side of the blade relative to a reed ... | 02/25/1992 |
| 5057821 | Filter sentry apparatus An apparatus including a housing secured to a filter web, wherein the housing includes a reciprocating rod directed orthogonally through the housing relative to the filter web, whereupon plugging of the filter web permits the rod to be directed through th... | 10/15/1991 |
| 5049860 | Two wire flow condition sensing system A flow sensor for detecting the absence of a minimum fluid flow in a sprinkler system. The fluid acts upon a vane positioned in the fluid path. Movement of the vane controls the position of a slider. The slider's surface has reflective and non-reflective ... | 09/17/1991 |
| 5021619 | Flow responsive switch apparatus A liquid flow switch apparatus is provided for connection to ducting wherein liquid flows forwardly. The apparatus comprises: a support body connectible to the ducting; a stem carried by the body to project into a liquid flow zone in the ducting, and a ma... | 06/04/1991 |
| 4958144 | Water-flow detector A water-flow detector with an electronic time delay. There is a light-emitting diode and photo-transistor detector pair, a timer comprising an oscillator and a counter, and an alarm relay. The output of the photo-transistor is applied to the reset input o... | 09/18/1990 |
| 4945344 | Fluid flow sensor having light reflective slider A flow sensor for detecting the absence of a minimum fluid flow in a sprinkler system. The fluid acts upon a vane positioned in the fluid path. Movement of the vane controls the position of a slider. The slider's surface has reflective and nonreflective e... | 07/31/1990 |
| 4936508 | Shower head volume meter with alarm signal A shower head volume meter producing an audible or other alarm for indicating when a predetermined volume of water has been delivered. A polite alarm or "beep" is used after a first volume of water y has been delivered, while an aggressive alarm in the fo... | 06/26/1990 |
| 4931776 | Fluid flow sensor with flexible vane A flow sensor for regulating the air flow rate to a cooling system can be formed as a housing for channeling the flow through a retangular cavity and a one piece vane of bent metal strip which deflects and closes an electrical contact at a predetermined a... | 06/05/1990 |
| 4906807 | Apparatus for monitoring the flow of fluid media in a pipeline An apparatus for monitoring the flow of fluid in the pipeline has a hollow housing with a control element movably supported therein. The control element is movable under the action of the fluid flow, from an initial position to a position triggering a swi... | 03/06/1990 |
| 4843376 | Boat drain plug warning apparatus A plastic paddle is pivotally connected to the operating arm of a microswitch. The paddle is positioned in front of a boat's drain opening. The paddle can be swivelled to one side to allow removal of the boat's drain plug. When the plug is removed and the... | 06/27/1989 |
| 4827092 | Flow monitor with non-rotatable mounting A flow meter or monitor arranged on a conduit section through which a medium to be monitored flows includes an actuating element extending through an opening in a wall of the conduit section, with a flow pressure plate of the actuating element positioned ... | 05/02/1989 |
| 4791414 | Water-flow detector A water-flow detector with an electronic time delay. There is a light-emitting diode and photo-transistor detector pair, a timer comprising an oscillator and a counter, and an alarm relay. The output of the photo-transistor is applied to the reset input o... | 12/13/1988 |
| 4791254 | Flow switch A switch is responsive to fluid flow within a conduit. It is highly sensitive to variations in flow and forms an effective seal between the fluid and atmosphere. It includes a plastic pivot ball in a spherical seat. A blade extends from the pivot ball int... | 12/13/1988 |
| 4782333 | Water-flow detector with rapid switching A cylindrical shuttle having a cone-shaped cam surface on one end which slides freely on a timer shaft between a first stop and a second stop which are attached to the shaft. A vane arm driven by a water vane engages the side of the first stop opposite th... | 11/01/1988 |
| 4725700 | Airflow switch for air ducts An airflow switch for sensing airflow or lack of same in an air duct comprising a housing base, mounting in side-by-side relation an adjustable range spring and a single-pole double-throw snap action microswitch, with the microswitch having its actuating ... | 02/16/1988 |
| 4449664 | Air quantity regulating apparatus for air conditioning An air quantity regulating apparatus for air conditioning according to the present invention has two functions one of which is a constant air quantity function and the other is a variable air quantity function in cooperation with a room thermostat. When a... | 05/22/1984 |
| 4377090 | Through-flow monitor for liquid or gaseous media A through-flow monitor of the type which produces a switching signal as soon as the rate of flow through a duct reaches a particular level consists of a generally tubular housing 1 which can be inserted via screw-threaded or other connections 3, 4 into th... | 03/22/1983 |
| 4361189 | Automatic fire extinguishing and alarm system for mobile homes A self-contained fire protection system can be supplied in kit form and is specifically adapted for installation by a novice in prefabricated or site built housing, such as, a mobile home, travel trailer or like building structure. The system comprises an... | 11/30/1982 |
