Abstract: A solid product level indicator (100) for determining the specific gravity of a use-solution (120) thereby indicating the concentration of the solid product (123) dissolved in the use-solution (120) includes a float assembly (125). The float assembly (125) includes a float (101) and a float stem (102). A guide member (104, 106 and 108) positions and guides the float (101). Magnets (114) contained inside the float (101) trigger a signal mechanism (112) inside the float stem (102) when the float (101) is displaced along the stem (102) due to the decrease in the specific gravity of the use-solution (120) when the concentration of the solid product (123) is low. The float assembly (125) can be positioned to provide early or late alert to allow replenishment of the solid product (123) before the supply of solid product (123) is critically low. The solid product level indicator (100) can be used in systems with constant liquid levels or variable liquid levels.

Abstract: An alarm system comprising a housing, a float, a battery compartment, a speaker and an alarm where the housing can be connected to the side wall of any container by a suction device fixedly engaged to the housing. The float rises with the water and creates a connection by completing a circuit when making contact with two separate conductors. The float compartment may be sealed with a threaded cap which can engage threads on the bottom of the housing.

Abstract: A sensor system for measuring displacement includes a primary coil wound around a longitudinal axis and at least one secondary coil wound around the longitudinal axis. Each secondary coil has a winding density distribution that varies between the ends thereof. The winding direction of each secondary coil varies between a clockwise winding direction between the ends thereof. A coupler is positioned adjacent the primary coil between the ends thereof. The coupler includes a resonating circuit configured to resonate at a resonating frequency. The coupler or the coils are configured to move relative to the other of the coupler or the coils. A control system excites the primary coil with a first step of a signal and receives from each secondary coil in response thereto a time varying signal. Each time varying signal includes a ringing component superimposed on a time varying component temporally adjacent the first step of the signal.

Abstract: A level control device is adapted for use in a wastewater pump station. The level control device cooperates with a discharge pump to control the volume of wastewater contained in the pump station. The level control device includes a buoyant housing for being located in the pump station, and capable of floating on a surface of the wastewater. A control switch is adapted for being operatively connected to the motor starter of the discharge pump to activate the pump when the housing reaches a predetermined elevation in the pump station due to an increasing level of wastewater. An anti-accumulation surface of the housing acts to resist accumulation of grease and other waste.

Abstract: A fuel level transmitter (10) consisting of two magnetic rotors (14, 16) placed on opposite sides of a non-ferrous wall (26) are arranged so that when the first rotor (14) is turned, the second rotor (16) follows due to the magnetic coupling between the two rotors (14, 16). Torque is produced, in part, as a function of the offset of the poles, magnetic strength and the distance between the rotors (14, 16).

Abstract: The present invention provides an oscillating liquid level measuring apparatus includes a liquid level measuring unit 10 having: a floating member 3 floating on a surface of liquid 1 in a tank 2; a variable resistor 4 arranged o the top of the tank 2 for measuring a perpendicular displacement of the floating member 3; a transmitting member 5 extending from the floating member 3 and through the top of the tank 2 for transmitting the perpendicular displacement of the floating member 3 to the variable resistor 4; and holders 6 arranged to sandwich the transmitting members 5 for restricting the movement of the floating member 3 only in the perpendicular direction. A connection portion between the transmitting member 5 and the variable resistor 4 has a predetermined allowance 9 in the displacement direction 8 of the floating member 3.

Abstract: The present invention provides a fluid level sensing switch for use with a device having a fluid reservoir. The switch is float activated and closes a circuit so as to change an operating parameter in the event that the volume of fluid in the reservoir falls below a predetermined level. Once the volume of fluid is restored to a predetermined safe level, the switch automatically resets to an open position to permit normal operation of device.

Abstract: An improved armless fluid level measuring device has a sealed housing tube and an externally exposed float. The float is slidably attached to the outer surface of the housing tube in which an elongated PC board is sealedly confined so as to protect the PC board from being sabotaged or eroded by fluid chemicals. The float provided with a plurality of high density magnet is slidable on the external surface of the housing tube. The PC board has a circuitry made up of serially connected resistors that are serially bridged together by way of magnet-controlled switches which are activated as the float is variably positioned in place by the fluid confined in a container whereby the serially connected resistors can form a closed circuitry to indicate the level of the fluid in a container via readings on a display of a gauge.

Abstract: In a lever transmitter for a fuel tank, two spring tongues, each with a sliding contact, are arranged on a contact plate of a potentiometer. The contact plate is prestressed against sliding tracks of the potentiometer by a spring element fastened to the carrier and having the sliding contacts due to vibrations are thereby reliably avoided.

Abstract: A liquid level sensor is provided that comprises an integral housing including therein a pickup tube, a return tube and a float cavity with a float positioned therein. Sensors are positioned within the float cavity for sensing the position of the float so as to determine the level of liquid within a tank or the like.

Abstract: A fuel storage device includes a fuel chamber storing fuel therein, a volume of the fuel chamber changing in accordance with a change in an amount of fuel in the fuel chamber. The amount of fuel in the fuel chamber is detected based on the displacement of at least two portions of a member constituting the fuel chamber that are displaceable in accordance with the amount of fuel in the fuel chamber.

Abstract: A liquid level detection device having a contact portion or a conductor electrode withstanding degradation is provided. The liquid level detection device 1 includes a moving element including a float 9 and an arm 10 operating according to the level in a fuel tank 2, a contact portion 7 provided at a sliding body 8 operating in synchronization with the movement of the moving element, and an insulating substrate 6 provided with a conductor electrode 4 which the contact portion 7 slides on, and the contact portion 7 is formed of an alloy free from Ag (silver).

Abstract: An apparatus for sensing a level of fluid within a container. The apparatus includes a first cantilevered arm having a first float coupled to the container. The apparatus additionally includes a second cantilevered arm having a second float coupled to the first cantilevered arm. The apparatus further includes a position sensing mechanism for sensing the relative positions of the first and second cantilevered arms and responsively determining the level of fluid within the container.

Abstract: Disclosed herein is a fuel sensor suited for sensing the level of fuel in a motor vehicle fuel tank. The fuel tank includes an interior mounting to which the fuel sensor is affixed. The fuel sensor has a cantilever member extending in a substantially horizontal direction from the mounting to a free end. The cantilever member is substantially rigid but can be deflected in the vertical direction. A probe is affixed at the free end of the cantilever member to extend in a substantially vertical orientation approximately the full height of the fuel tank. A stabilizer member is affixed at one end to the mounting and at an opposing end to the probe. The stabilizer member has a pivot segment between the ends permitting the probe to move vertically but not horizontally. According to Archimedes's principle, the probe encounters a buoyant force equal to the weight of displaced fuel which induces strain in the cantilever member.

Abstract: A sensor monitoring system comprises a passive sensor, a monitored transmitter, a repeater, and a central receiver. The system provides easy installation, convenient calibration, and very low maintenance. The sensor and the monitored transmitter are battery powered and, in order the conserve battery power, the sensor and the monitored transmitter receive power only on command from their respective microprocessor.

Abstract: A safety float device for air conditioning units for providing easy and convenient installation of a switch to air conditioning systems. The safety float device for air conditioning units includes a switch assembly having a housing, a switch disposed in the housing, and wires extending from the switch; and also includes a float assembly having an arm member movably connected to the switch, and further having a float support member securely attached to an end of the arm member, and also having a float member securely and removably attached to the float support member; and further includes a fastening assembly being securely attached to the housing of the switch assembly for removably fastening to an air conditioning unit.

Abstract: A microwave radar signal system generates separate level indicating signals for transmittal through a sounding tube into a contamination tank having a mixture of fuel and gross free water collected therein. The separate level indicating signals are thereby respectively reflected from the level of a top surface of the collected liquid mixture and a lower level of an interface between the fuel and the gross free water portions of the mixture to respectively provide data for determination of total liquid volume collected and the volumetric content of the fuel therein. The interface level location is established by means of a floatation ball disposed within the sounding tube, from which level indicating signals are reflected.

Abstract: A temperature-controlled appliance control system in which a compressor runtime is stored in a memory. If the runtime reaches a critical point an error message is displayed. The service technician can display this information by the monitor on the appliance, downloading it to a computer, relaying by modem, or any other conceivable way. The information displayed will go back in different intervals (runtime for day, week, and numbers of cycles). The memory eliminates the effect of defrost from the given compressor runtime.

Abstract: An automatic infusion-monitoring instrument includes a clip adapted to clamp a flow-indicating cylinder of an infusion set corresponding to a liquid level in the cylinder that keeps unchanged when there is sufficient amount of infusion liquid in the infusion set, a floater pre-disposed in the flow-indicating cylinder to move upward and downward along with the liquid level in the flow-indicating cylinder, a detecting unit having an emitter and a receiver mounted in the clip to normally face the floater, and an alarm unit electrically connected to the detecting unit via a conducting wire. When the liquid level in the flow-indicating cylinder lowers so that the floater is moved to locate below the emitter and the receiver and no longer blocks the wave emitted by the emitter, the alarm unit is actuated to emit sound, voice, light or flash as a warning signal of running-out infusion liquid.

Abstract: A fluid level sensor for a fluid tank of a marine vessel is provided. The sensor includes a sensor mount and further includes a circuit housing that is pivotally connected to the mount to pivot about a predetermined pivot axis. A float assembly is configured to supply an actuating angle substantially impervious to fluid tank tilt and/or fluid splash at least along an axis generally perpendicular to the pivot axis. A circuit in the circuit housing is responsive to the actuating angle from the float assembly to provide an output signal indicative of the fluid level in the tank.

Abstract: The present invention relates to a measuring device for measuring flux rate and temperature of a flowable medium, comprising an external pipe sleeve and an internal pipe provided within said external pipe sleeve, with the diameter of said internal pipe having been dimensioned such that a cavity is formed between said internal pipe and said external pipe sleeve, wherein medium is allowed to flow into said internal pipe via an aperture formed at a first end of said internal pipe, and an aperture is provided at the second end of said internal pipe via which the medium can flow out of the internal pipe and exit the measuring device via said cavity. A flux meter and a temperature meter are provided within or along this flow path formed in the measuring device.

Abstract: A method and system for remote monitoring of liquid level 21 within a container 12, such as the level of fuel within a propane cylinder. A magnetic float 20 disposed within the container 12 floats on the liquid 21, and lowers with the liquid level as fuel is consumed. Magnetic sensors 22 outside the container 12 sense the float 20 as it passes in the proximity of one of the sensors 22. A controller 26 receives output signals from the sensors 22 and transmits level indicating signals to a gauge 28 or other indicator for remote indication of the corresponding liquid level. The indicator 28 can be located proximal the user's direct line of sight, to remind the user to periodically monitor the fuel level to prevent running out of fuel.

Abstract: A fuel gauging system for a motor vehicle fuel tank, including a housing (100) supporting a resistive element (200), an arm (300) pivotally mounted on the housing (100) and comprising at least one cursor (350) engaging the resistive element (200), and a lever (400) provided with a float connected to the arm (300) for monitoring the movements thereof. The system includes a housing (100) and an arm (300) which comprise complementary rotational guides (120, 310) and structure (316, 317, 318, and 319) to enable translation of the arm (300) on the housing (100). The arm (300) is combined with an L-shaped lever (400) so that one of the sections (420) defines the pivot axis of the device.

Abstract: A liquid level detector that includes an internal tube, a coil wound on an external surface of the internal tube, an external tube, a float ball, a base, and an upper fixing socket. The float ball is disposed in the internal tube, which is wound by a coil on its external surface. The internal tube is enclosed by the external tube, wherein an upper end of the internal tube is connected to the upper fixing socket, while the bottom end is coupled with the base. The two ends of the external tube are sealed for protection of the coil wound on the external wall of the internal tube. When the liquid level detector is employed to detect a liquid level, the float ball in the internal tube will move up or down according to the liquid level, and the induced change in inductance will be converted into a usable signal by a conversion circuit to drive a display apparatus to show the liquid quantity.

Abstract: A liquid level control system utilizes a sensor that is attached to a fixed support relative to a liquid container and transmits radio-frequency signals to a remotely located liquid supply system depending upon fluctuations in the liquid level. In the context of a swimming pool, the sensor housing is attached to a sidewall of the pool, at the desired water level. A sensor circuit located within the housing floats at the liquid level, and as changes occur, movement of the floating sensor results in the transmission of signals to either activate or deactivate a supply valve that supplies replacement water to the pool. A small opening located at an upper portion of the sensor housing cooperates with the floating sensor to dampen the motion of the sensor, providing a more accurate reading of the liquid level.

Abstract: In a fuel tank (1) for a motor vehicle, a carrier (12) of a fuel level sensor (8) is manufactured in one piece with a wall of the baffle (4). As a result, the fuel tank (1) is composed of a very small number of components and can be mounted in a particularly simple way. In the region of a mounting for a lever arm (9) carrying a float (10), the carrier (12) is spaced from the baffle (4). The lever arm (9) can thereby engage round the mounting. The filling level sensor (8) has high stability as a result.

Abstract: A method and apparatus for determining unique fuel amount limit values for a fuel tank of a particular vehicle. The fuel tank has a first fuel amount limit that is associated with a level of fuel in the fuel tank. A fuel varying activity is performed related to the fuel tank of the vehicle so that the level of fuel in the fuel tank is beyond the first fuel amount level. A second fuel amount limit is determined based upon the level of fuel that is beyond the first fuel amount level. A fuel amount indicator display is adjusted based upon the determined second fuel amount.

Abstract: Two embodiments of an analog liquid level sensor are provided for measuring the level of a liquid in a container having a volume/depth relationship wherein each sensor has a resistance-to-float-displacement profile matched to the volume/depth relationship of the container. Each sensor includes a dielectric coated metal bar which acts as a heat sink and a ground plane. A pair of electrically spaced terminals and a printed circuit including a thick film resistor pattern and a metallization pattern having metallized graduations are formed on the metal bar for reduced electrical noise characteristics and improved hysteresis. The resistance of the resistor pattern is electrically coupled between the terminals and has a resistance which varies at different positions between the terminals. The metallization pattern is formed on the resistor pattern which, in turn, is formed on opposite sides of the dielectric coated metal bar.

Abstract: A sensor for detecting levels of fluids and particulate matter is based on differences in dielectric constants of the various materials. The difference is reflected in different capacitance across electrodes immersed to different depths in such materials. A square-wave clock pulse is input into circuit composed of the capacitance and a resister in series. The output voltage is fed into a logic unit (such as exclusive-OR), which converts the exponential decay of the voltage into a pulse of uniform height with duration proportional to the time constant (proportional to the capacitance) of the exponential decay. The pulse is optionally fed through a low-pass filter to give a signal proportional to the duration.

Abstract: A filling level sensor has a carrier part (1) having a lever wire (3) which is attached to a bracket (2) and is axially guided by a bar-shaped apron (11). The bracket (2) has webs (9, 10) which protrude radially with respect to its pivotable and axially nondisplaceable bearing and over which flange elements (7, 8) of the carrier part (1) engage. As a result, the bracket (2) is at a constant distance from the carrier part (1) and is additionally of particularly simple design.

Abstract: A wiper for use in a system for monitoring fluid level in a fluid storage container. The wiper has a body portion, a first lengthwise end, a second lengthwise end, a first side, a second side opposite the first side, a width and a pair of resilient contact members electrically connected to one another. Each contact member extends from a corresponding side of the body portion. The wiper also has a guide portion attached to the first lengthwise end. The guide portion has a width larger than the width of the body portion. The wiper includes a recess formed in each side of the body portion for receiving a corresponding resilient contact member thereby allowing the resilient contact members to be compressed so as to be substantially flush with the body portion. In one embodiment, the recesses extend through the guide portion. In one embodiment. the wiper includes an electrically conductive member that has a portion thereof that is embedded in the body portion.

Abstract: A float-type liquid level gauge (20) is provided for measuring the level of a liquid within a storage tank (22). The gauge includes a gauge head (30) adapted for mounting to a portion of liquid storing container, a support arm (32) connected to the gauge head and depending therefrom into the tank, a float arm (34) including an elongate inner arm section (46), an elongate outer arm section (48) and a hinge section (50), and a float (36) connected to the outer end of the float arm. The inner section of the float arm is pivotally connected to the support arm for movement through an arc defining a first plane. The hinge section is connected at a first end to an outer end of the inner arm section and connected at an opposite end to the inner end of the outer arm section.

Abstract: A side mount liquid level sensor (10) includes limit arms (100, 102) on the float (80) and limit wings (54, 56) on the switch housing, with the limit wings (54, 56) being spaced vertically from the stem (14) of the housing (11) whereby to allow float (80) to traverse a range of travel that is at least 50% of the vertical depth (D) of the slot (86) of float 80 and advantageously substantially equal to that depth (D). The spacing (58) between wings (54, 56) and stem (14) allows wings (100, 102) to pass therebetween for assembly, but not while sensor (10) is in use.

Abstract: The alarm system is capable of detecting both conductive and non-conductive liquid level increases, designed for indoor operation, and ideally suited for detecting basement flooding or leaky domestic steel oil tanks or other fluid containment devices. A float, positioned above any surface such as a contained area (sump or drip pan), rises with the presence of a liquid, allowing a spring-loaded switch to rise, triggering a 9-volt powered battery electric circuit. The electric circuit, enclosed in a plastic enclosure, activates an audible pulsating alarm when triggered. A battery voltage monitor incorporated in the electric circuit, tests the battery voltage on a continuous bases, and will trigger the unit into the alarm mode when the battery voltage is insufficient to sustain continuous operation. A simple convenient self check feature allows the user to simply check the unit at any time.

Abstract: A liquid level meter is provided for measuring a level of a liquid (1) in a container (3), which meter measures acceptably in the case of liquids with low dielectric constants, and the installation and maintenance of which are simple and cost effective. This meter comprises an electronic circuit (13), which generates electromagnetic signals in operation, a conductor (7), which projects into the container (3), along which a float (11, 11a, 11b, 11c, 11d, 11e) moves along with the level, which has at least one segment reflecting electromagnetic signals, an injector (9), which transmits the signals from the circuit (13) to the conductor (7), which conductor (7) leads the signals into the container (3) and leads out a signal reflected at the float (11) and a receiving and evaluating circuit (15), which receives the reflected signals, which determines a travel time of the signals and which ascertains the level from the travel time.

Abstract: A tank level monitoring and alarm system comprises a passive level switch, a transmitter, a repeater, and a receiver. It provides easy installation, convenient calibration, and very low maintenance. A mechanical level switch for the specific vessel is installed. The contacts of the level switch are connected to the transmitter. When the switch is activated, the transmitter immediately broadcasts an alarm signal to the receiver. A relay output at the receiver is either opened or closed thus activating the alarm or other device attached to it. The relay output may also connect to a control apparatus, such as a signal transmitter to provide for remote operation of such devices as valves.

Abstract: Apparatus and method are provided for indicating the amount of liquid contained in a railroad tank car, or any other liquid storage tank having an interior surface defining a liquid level reference point. A readily portable liquid level indicator gauge is provided having a tube defining an opening extending along its length, and an elongate rod slidably received therein. A buoyant member is attached to the rod to cause the rod to be vertically displaced in response to the vertical displacement of the buoyant member resulting from a corresponding change in liquid level. A reference arm is connected to the tube and a portion thereof forms an abutting relationship with an interior surface of the tank at the liquid level reference point. A clamping device connected to the tube is adapted to releasably attach the portable gauge to the tank in a substantially vertical orientation.

Abstract: A float-type liquid level gauge (20) is provided for measuring the level of a liquid within a storage tank (22). The gauge includes a gauge head (30) adapted for mounting to a portion of liquid storing container, a support arm (32) connected to the gauge head and depending therefrom into the tank, a float arm (34) including an elongate inner arm section (46), an elongate outer arm section (48) and a hinge section (50), and a float (36) connected to the outer end of the float arm. The inner section of the float arm is pivotally connected to the support arm for movement through an arc defining a first plane. The hinge section is connected at a first end to an outer end of the inner arm section and connected at an opposite end to the inner end of the outer arm section.

Abstract: A fuel level indicator system that utilizes a resistor card having an arc-shaped resistive path with a first set of spaced apart conductor lines and an arc-shaped resistive ink material overlying the first set of conductor lines. There is provided a first and second set of insulative bars that are screened between and parallel to the first and second sets of spaced apart conductor lines respectively. The bars provide for decreased wear of the fuel level indicator system. The first conductor lines are formed at an angle with respect to a radial line drawn from the center of the resistive path arc. The resistor card also has an arc-shaped continuously solid conductor base and a second set of spaced apart conductor lines extending from the base at an angle with respect to a radial line drawn from the center of the arc-shaped conductor base. The system includes a wiper assembly having a pair of spaced apart arms. Each arm has a plurality of parallel fingers extending from one end.

Abstract: A fluid level measuring device for measuring a fluid filling level in a container contains a float disposed in the container and a magnet disposed in the container. The magnet is coupled to the float in terms of movement and, in the event of a change in the fluid filling level, executes a movement that corresponds to a change in fluid level. A magnetic field sensor is disposed in a zone of influence of a magnetic field generated by the magnet and outputs an electrical signal which is representative of a height of the fluid level.

Abstract: A float sensor that is modular has a mounting bracket which incorporates an O-ring seal and bayonet style resilient mounting fingers which lock the mounting bracket to a tank flange. A tube is ultrasonically welded to the mounting bracket and positions a reed switch housing which is ultrasonically welded to the end of the tube opposite the mounting bracket. The reed switch housing incorporates a stop positioned above a descending cone. The cone terminates in radially outwardly extending fingers that lock a float to the reed switch housing. The float is free to float upwardly along the cone to engage the stop. The float has a ring shaped magnet foamed in place within a low density plastic body. The presence of fluid buoys the float upwardly until the float engages the stop.

Abstract: Liquid level lever gauge with a hinged counterweight segment, or a hinged float arm segment or both a hinged float arm segment and a hinged counterweight segment. The invention permits lever arm gauges to be used in liquid storage tanks having small openings through which the gauge can be inserted.

Abstract: A float for a liquid level detection apparatus including a tube extendable through liquid in a tank. The float is a buoyant body slidably mounted about the tube and having a diameter passable through an aperture in the tank. The float is preferably formed of two separate bodies joined by spacers positioned to allow the body to pivot from a first position substantially axially in line with the tube for insertion and removal of the float with respect to the tank to a second position substantially perpendicular to the tube in operative floating engagement with the liquid surface in the tank. The spacers, in one embodiment, are in the form of pins arranged in pairs along opposite side edges of the two bodies and spaced apart along the length of the two bodies such that the innermost pins of the two pairs of pins define an aperture for mounting the bodies transversely about the tube in the second, floating position.

Abstract: A bathtub water level warning device for activating an audible and/or visible warning indicator when the water level in a bathtub approximately reaches a predetermined level, comprising a watertight case including a float element, a tubular stem element and a tubular pivot element. The alarm device is an independent device which floats free of the bathtub upon the bathtub reaching a filled condition, therefore allowing removal or inclusion of the device in a bathtub as desired by a user, such as during filling only. The alarm device includes a power source, a gravity switch, and an audible and/or visible warning indicator is internally mounted in the alarm device. Gravity causes the switch to close when the alarm device is in a substantially vertical orientation.

Abstract: A variable resistor useful for automotive type fuel senders has a cermet film fired upon a refractory substrate. The cermet film is burnished to reduce asperity of the fired film. The resulting resistor element works with existing mechanical float type senders to provide a reliable and long lasting sender.

Abstract: A magnetically actuated float switch for turning on and off an electrical load device which includes a mounting member, a moveable bracket member which is attached to the mounting member and which is moveable between a first bracket position and a second bracket position by an external force. The moveable bracket member further has a first magnetic end and a second magnetic end which define a space therebetween. The first magnetic end and second magnetic end are oriented in a repelling arrangement. Insertion of a magnet in the space between the magnetic ends of the bracket results in the moveable bracket being moved from the first position to the second position. The moveable bracket member is operatively arranged to change the state of a switch between a first and second state. The switch is in turn operably arranged to change the state of an electrical load device between an on state and an off state.

Abstract: The liquid Leak Detector container must be mounted on the radiator support frame in a level position about eight inches from the radiator in line with the overflow tube. The overflow tube has to be cut to enable the tube ends to be fitted over each nipple of the container and secured by adjustable clamps. The radiator must be filled up with coolant to the top of the radiator filling neck while pinching the overflow tube below the coolant level of the overflow holding tank. The radiator cap is put on tight and the pinched tube released. When the engine is started up the coolant will increase in temperature and expand forcing the coolant to flow through the detector container to the overflow holding tank until the engine has reached operating temperature. The coolant will flow back into the radiator when the engine is not running.The presence of air in the coolant begins to accumulate in the top of the radiator when a leak develops.

Abstract: A float-type liquid level gauge is provided for measuring the level of a liquid such as LPG within a horizontally oriented cylindrical tank (228). The gauge includes a movable pivot arm (212) supporting a float arm assembly (225) and coupled by gears (207, 214) to a magnet shaft (206, 208) and magnet (210) mounted in a rigid support arm (204) through a sideways-securing shaft channel(209). The support arm is connected to the lower side of a gauge head (202) and the magnet extends into a passage (52) in the gauge head so as to be magnetically coupled to a level indicating dial (226) provided on the upper side of the gauge head. The lower portion (302) of the support arm is angled and offset with respect to a longitudinal axis (265) such that a high ratio can be obtained between the gears while still permitting the components of the gauge to pass through the opening of a standard pressure fitting (234).

Abstract: The level of liquid in a tank is sensed using a pair of magnets arranged such that when in proximity to each other, a magnetic force is generated that activates a micro-switch. One of the magnets is mounted on a float carried on the surface of the liquid and constrained for vertical movement within a tube. The second magnet is stationarily mounted on the tube at a position where the liquid level is to be sensed. A latch mechanism actuated by the movement of the second magnet latches the micro-switch in an actuated position until actuated by the second magnet a second time.

Abstract: An oil level detector mounting arrangement, which includes a mount having a downward tube dipped in the oil in the oil tank of a vehicle, a float floating in the oil in the oil tank and moved along the downward tube, and a circuit board sealed in the downward tube and carrying a plurality of solenoids at different elevations for acting with magnets at the float to indicate the elevation of the float in the oil tank, wherein the solenoids each have a first end inserted through a respective hole at the circuit board and then welded to a contact at the circuit board, and a second end inserted through a respective hole at the circuit board and then welded to a common springy wire conductor suspended from the circuit board.