[특허]Apparatus for monitoring and controlling liquid level

[미국특허] Apparatus for monitoring and controlling liquid level 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H01H-047/00
출원번호	US-0961985 (1978-11-20)
발명자 / 주소	Sims Bobby H. (417 Illinois St. Hot Springs AR 71901)
인용정보	피인용 횟수 : 38 인용 특허 : 2

초록 ▼

An apparatus for monitoring and controlling the liquid level in a storage tank which involves placing at least two magnetically operated switches, e.g., magnetic-reed switches, at different levels in the tank and causing a magnet-containing float to move in response to the liquid level to activate these switches. A relay operates upon activation of the higher of these switches to start electrical current flowing to operate a discharge pump, thereby controlling the liquid level in the tank. In a preferred embodiment, a third magnetically operated switch is employed so that when the magnet activates the third switch at least one indication, e.g., sound and/or light alarm, is given that the liquid level is at least at a predetermined level.

대표청구항 ▼

An apparatus for monitoring and controlling the level of liquid in a storage tank equipped with a pump to discharge liquid from said storage tank as desired, said apparatus comprising; a tubular guide extending substantially vertically inside said storage tank; a first magnetically operated switch located in said tubular guide; a second magnetically operated switch located in said tubular guide a distance above said first magnetically operated switch; a first electrical current source acting to cause current to pass through said first and second switches when said first and second switches are individually in the closed position and form part of an electrical circuit; a float slidable on the exterior of said tubular guide in response to the level of liquid in said storage tank; magnet means carried by said float and having sufficient magnetic force to activate said first switch and second switch as said float slides on said tubular guide to a location in proximity to said first and second switches, respectively; a second electrical current source to provide current to activate said pump in response to the position of said first and second magnetically operated switches; first relay means acting to allow current from said second source to start flowing to activate said pump as said magnet means activates said second magnetically operated switch, provided that said current to said pump is interrupted in response to said magnet means, activating said first magnetically operated switch; and an alternate second magnetically operated switch located in said tubular guide a distance above said second magnetically operated switch, said alternate switch being in electrical communication with said first current source so that current passes through said switch when said switch is in the closed position and forms part of an electrical circuit, said second current source providing current in response to the position of said alternate switch and provides said current as said magnet means activates said alternate switch, provided that only one of said second switch and said second alternate switch need be activated to start current flowing to said pump.

이 특허에 인용된 특허 (2) 인용/피인용 타임라인 분석

Bongort Edgar A. (Southfield MI) Cruickshank William T. (Pontiac MI), Liquid level sensor.
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Thomas Gilbert (Saint Cloud FRX), Magnetic position detectors.
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이 특허를 인용한 특허 (38) 인용/피인용 타임라인 분석

Tice Charles (Plantsville CT), Adjustable differential fluid level float indicator.
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Yang F. Y.,TWX, Apparatus for sensing liquid level.
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Orth Stephen R. (Park Ridge IL) Siegal Burton L. (Skokie IL), Automatic float control switch for a bilge and sump pump.
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Kato, Nobuhide; Mizuno, Hiroyuki, Ball tap with a water level switch.
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Cummings, Eugene M., Battery-powered backup power system for a sump pump installation.
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Brown Toran S. (Los Angeles CA) McGregor William T. (Malibu CA), Bottled water pumping apparatus.
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Kotyk, Jeffrey M., Container system.
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Lewis Steven M. (Santa Clara CA), External tank level control system.
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Tetro, Roland G., Flexible means for measuring liquid level.
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Fox Ronald L. (P.O. Box 234 Sandia Park NM 87047) Amundsen Scott A. (7316 Carriage Rd. NE. Albuquerque NM 87109), Flow meter for a positive displacement pump.
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Andrejasich Raymond J. (Carmel IN), Fluid detection system.
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Mergenthaler Robert (2945 State Road 84 Fort Lauderdale FL 33312), Hybrid float switch.
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Steiner Charles W. (Brooklyn Park MN), Hydraulic switch for a pump.
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Sun, Jifan; Qin, Zhao; Kong, Lingfeng, Induction type of electronic thermometer probe motion detection device.
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Ross ; Jr. Herbert G. ; Taylor Carl A. ; Williamson Cecil M., Linear positioning indicator.
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Ross ; Jr. Herbert G. ; Taylor Carl A. ; Williamson Cecil M., Linear positioning indicator.
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Schopperle, Jeff B.; Batchelder, Scott, Livewell/baitwell pump featuring rotating transom pickup tube.
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Bergum, Alan J., Magnetically actuated switch.
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Noel, Raymond Ascord, Multiple switch float switch apparatus.
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Noel, Raymond Ascord, Multiple switch float switch apparatus.
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Noel, Raymond, Multiple switch float switch apparatus having a magnetic coupling.
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Calabrese, Ronald V., Self-calibrating liquid level transmitter.
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Calabrese,Ronald V., Self-calibrating liquid level transmitter.
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Calabrese,Ronald V., Self-calibrating liquid level transmitter.
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Weng Evans (No. 1 ; 4 Nong ; 63 Lane ; Fu Shing Rd. Taipei TWX), Structure of fluid level controller of piping type.
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Cummings, Eugene M., Sump pump test and monitoring system.
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Hasselmann Detlev E. M. (519 S. Nardo Ave. Solana Beach CA 92075), System and method for automatically monitoring liquid volume changes in storage tanks.
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Hasselmann Detlev E. M. (519 S. Nardo Ave. Solana Beach CA 92075), System and method for automatically monitoring liquid volume changes in storage tanks.
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Cummings, Eugene M., Test and monitoring system for a battery-powered DC pump installation.
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Cummings, Eugene M., Test and monitoring system for a dual sump pump system.
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Cummings, Eugene M., Test and monitoring system for a sump pump installation having a self-monitoring liquid level sensing module.
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Cummings, Eugene M, Test and monitoring system for a sump pump installation having a self-monitoring valve module for admitting water to the sump pit.
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Cummings, Eugene M.; Ty, Try, Test and monitoring system for a sump pump installation having a self-protecting valve assembly for admitting water to the sump container.
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Cummings, Eugene M., Test and monitoring system for a sump pump installation having a variable test cycle time out.
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Cummings, Eugene M., Test and monitoring system for a sump pump installation including trend analysis of pump performance.
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Cummings, Eugene M.; Berland, Kerry, Test and monitoring system for a sump pump installation operable from a remote location.
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Cummings, Eugene M., Trap for pump testing and monitoring systems.
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Hsieh Sheng-Shun (2F ; 8 ; Lane 73 ; Chinshan S. Rd.-Sec. 1 Taipei TWX) Liu Ting-Chih (2F ; 8 ; Lane 73 ; Chinshan S. Rd.-Sec. 1 Taipei TWX), Water level and temperature detector alarm device.
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A	생활필수품
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[미국특허] Apparatus for monitoring and controlling liquid level 원문보기