Abstract: A water-conducting household appliance includes a liquid container having a static content level, a fill control device, a cycle control unit, an inflow valve to be opened by the cycle control unit and closed by at least one of the fill control device and the cycle control unit, an evacuation pump, a switch having a switching position in which the switch turns on the evacuation pump and selectably closes the inflow valve, and a chamber hydraulically communicating with the liquid container and having an opening for the entry of water. A safety device for the appliance includes a safety level switch device having a float disposed in the chamber, the float having a switching position in which the float acts upon the switch, and the float having a position of repose in which the float is kept at a distance above the static content level and in which the float acts upon the switch to switch off the evacuation pump.

Abstract: The invention relates to a float valve (3) for container filling systems, especially for electrical traction battery filling systems, comprising a valve housing (10) that accommodates a valve chamber (11) and a valve head (31), the valve chamber being provided with a filling medium supply inlet (16) and an outlet (17) leading to a container, the valve head (31) being connected to the float via a stem and a float rod (35, 36, 37) and being movably disposed in a valve chamber (11) to open the inlet and the outlet (16, 17) and shut off the outlet (17). To guarantee quick closing action also with low liquid pressures and to prevent dripping in the closed position it is proposed according to the invention that the filling medium be introduced first in a distribution chamber from where it flows into the valve chamber in a manner that it enters the valve chamber in the bottom area of the latter along the entire surface of the side walls and flows uniformly through the valve chamber.

Abstract: A safety tank apparatus is provided for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn. It comprises tank structure including an inner metallic tank; an outer metallic tank protectively receiving the inner tank with accessible interior space laterally of the inner tank; a barrier wall between that interior space and the inner wall: an opening in the outer tank sidewall adjacent that interior space; and a closure closing the opening, the closure movable to expose the interior space to access from the exterior; and tank liquid flow control structure accessible through the side wall opening, for controlling filling of the liquid into the inner tank from the exterior of the safety apparatus, and for controlling liquid removal from the inner tank.

Abstract: A safety apparatus for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn comprising a structure including first and second inner metallic tanks, and an outer metallic housing protectively receiving the inner tanks, the outer housing having a side wall, there being upper interior space above the inner tanks and within the housing the second inner tank located within the first inner tank; the housing including a cover extending over the inner tanks; an opening in the sidewall, and a closure closing the opening, the closure movable to expose the upper interior space to access from the exterior; and control structure below the cover, and accessible through the opening for controlling flow of the liquid into the second tank from the exterior of the safety apparatus.

Abstract: The present invention is an automatic volume fill control apparatus to be used in conjunction with a recovering device which is operable upon being electrically connected to an electrical power source. The automatic control apparatus comprises a control unit electrically interconnected between the electrical power source and the recovering device. The control unit has an electrical circuit which includes an electrical relay switch and connects with a float switch installed in a recovered refrigerant tank. The float switch is normally closed when the refrigerant tank is less than 80% filled, which causes the relay switch to be closed to establish electrical connection between the power source and the recovering device, so the filling of the refrigerant tank continues. When the refrigerant in the tank reaches 80% in volume, the float switch will be opened, which causes the relay switch to open to cut-off the electrical connection between the power source and the recovering device, so the filling process stops.

Abstract: A condensate drainage device employed as a safety device for preventing the discharge gases produced by combustion from flowing out through the condensate drainage conduit, in condensation boiler apparatuses.

Abstract: Safety tank apparatus for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which liquid may be withdrawn, including: tank structure including an inner metallic tank, and an outer metallic tank protectively receiving the inner tank, the outer tank having a side wall, there being upper interior space above the inner tank and within the tank structure; the tank structure including a cover extending over the interior space; an opening in the sidewall, and a closure closing the opening, the closure movable to expose the upper interior space to access from the exterior; and control structure below the cover, and accessible through the opening for controlling flow of the liquid into the inner tank from the exterior of the safety apparatus; the closure extending above the level of liquid in the inner tank.

Abstract: A valve for controlling the level of fluids in basins, such as stands for cut trees, aquariums, or hydroponic plant basins. The valve 6 includes a rigid fluid conduit 26 passing through the wall of a float chamber 16, in order to transmit fluid into a flexible tubing 28 connected to the portion of the rigid fluid conduit 26 inside the float chamber 16. In the valve's open position, the flexible tubing 28 is maintained in a partially bent postion, riding on the upper end of a float 30 contained within the float chamber 16. As the fluid enters the float chamber 16, and exits into basin 8, the fluid level rises causing the float 30 to rise in float chamber 16. The rising float further bends the flexible tubing 28, causing it to collapse and block the flow of fluid therethrough. As the fluid in basin 8 falls, the flexible tubing 28 returns to its original position, and the flow of fluid through the valve resumes.

Abstract: A valve assembly includes a tubular member, a hollow case connected to an open end of the tubular member, a linkage having a first end pivotally connected to the hollow case, a float connected to a second end of the linkage, and a control valve member movably mounted in the tubular member. A plate member is connected to the open end in the case to close the open end. The plate member has a smaller hole communicating with the open end. A narrower end of the control valve member passes through the open end and a through hole of the case, being pivotally connected to the linkage. The wider end of the control valve member is moved to close the hole of the plate member when the linkage is rotated by the float in a first direction, and to open the hole of the plate member when the linkage is rotated in an opposite second direction.

Abstract: A quantitative liquid level controlling device, comprising a housing having a socket at the top for attaching to a water supply pipe, and a control rod with a gravity pendant suspending therefrom through a cord for adjusting the desired water level. The gravity pendant pulls down the control rod to stop a connecting rod in position permitting a driving rod to constantly move a ball away from the water outlet hole inside the housing. The gravity pendant is floated when the desired water level is reached, permitting the control rod and the driving rod to move back so that the ball is returned to block up the water outlet hole.

Abstract: A fluid level controller flexibly set up according to the number of level steps to be controlled and the pitch between such level steps, which comprises a plurality of joint pipes connected in series to form a pipe assembly; a ring-shaped magnetic floating member sleeved on such a pipe assembly to follow fluid level to move up and down; a plurality of reed elements having each a reed switch connected in series with one another and received in the joint pipes; a main control circuit comprising latching relays in quantity one less than the quantity of the reed elements and a plurality of controlled actuators respectively connected to the reed elements.

Abstract: A dishwasher is provided with an improved apparatus for protecting the tub from being overfilled in the form of a float having a float stem that is automatically captured upon insertion through a passage in the tub bottom wall such that the float will be restrained against disengagement from the tub bottom wall. The float is vertically movable to operate a control switch for regulating the level of water within the tub. Preferably a retaining ring is carried on a stem of the float which is automatically biased through a varying diameter keyway and is subsequently moved to a captured position below the member having the keyway.

Abstract: A safety tank apparatus is provided for installation to receive and store a liquid hydrocarbon or hydrocarbons, or the like, and from which the liquid may be withdrawn. It comprises tank structure including an inner metallic tank; an outer metallic tank protectively receiving the inner tank with upper interior space above the inner tank; a cover extending over the inner and outer tanks above that space; an opening in the outer tank sidewall adjacent that upper interior space; and a closure closing the opening, the closure movable to expose the upper interior to access from the exterior; and tank liquid flow control structure located below the top wall, and accessible through the side wall opening, for controlling filling of the liquid into the inner tank from the exterior of the safety apparatus, and for controlling liquid removal from the inner tank.

Abstract: Disclosed is a valve apparatus having water inlet and outlet pipes, means for maintaining water which may have ruptured from a water storage tank in a water containment area, a float within the water containment area, a float-rod attached to the float which has a triangular gear attached to the other end of the float-rod. The triangular gear interacts with a circular gear when the float-rod is raised causing the circular gear to rotate away from the valve housing pulling a rod which causes a metal strip to be pulled over the water outlet pipe preventing water from being delivered from the valve housing to the ruptured water storage tank. The on/off switch of a water pump may also be connected to the float-rod such that the water pump is turned on when the float-rod is turned on pumping water out of the water containment area.

Abstract: A liquid level control system for automatically stopping the flow of water in a bathtub. The system includes an adjustable level control mechanism and a flow control device. The control mechanism comprises a float suspended from a flexible chain and slidingly mounted in a vertical chamber hydraulically linked to the bathtub. When the float is buoyantly actuated by the level of the water reaching a predeterminedly set height, the flow control device obturates the inlet of water coming from the water supply conduit.

Abstract: A pneumatic safety device designed to prevent water leakage caused by failure of any washing machine component. Said device comprises one or two pneumatically-actuated valves positioned downstream from the machine's water supply faucet. When said machine is being filled with water a small electric pump generates compressed air that opens the water inlet valve(s) against the reaction of springs. A float associated with an electric switch, normally closed when the machine is operating, rises when water leaks occur opening said switch, which shuts off the machine and pump power, and also closes the water intake valve(s).

Abstract: A liquid level control in a refrigeration system operates a solenoid valve to maintain the level of liquid refrigerant in a vessel within a range defined by predetermined lower and upper liquid levels, sounds an alarm if the upper level is exceeded and stops a pump if the lower level is violated. The control comprises a float assembly and a switching assembly. The float assembly comprises a float chamber connected to the vessel, a float ball therein, a vertically extending float rod connected to the float ball and movable along a vertical path, and a pair of spaced apart stop members on the float rod disposed within the switching assembly. The switching assembly comprises a switch actuator permanent magnet, having magnet poles at opposite ends, slidably mounted on the float rod between the stop members and movable thereby along the said path.

Abstract: The present invention discloses an apparatus for monitoring the level of a liquid such as water in a reservoir of a water cooling tower or the like wherein it is required to maintain a predetermined desired liquid level and for generating a first control signal for controlling the addition of make-up liquid to the reservoir and a second control signal for terminating the addition of liquid to the reservoir. The apparatus includes a float chamber having it bottom coupled to the reservoir for equalizing the water levels therebetween. A float is positioned within the float chamber for rising and falling with the level of monitored liquid therein. A float rod extends vertically upward from a central portion the float for movement therewith. A lever housing is fixedly secured in an intermediate position within the float chamber, and the lever housing pivotally mounts a lever member therein. The lever member has a long lever arm and a short lever arm.

Abstract: A liquid level control float valve comprising a valve body having an inlet, a cap having an outlet, a drain pipe having a drain aperture, a piston member having a fluid aperture disposed in an upper plate and a disc valve disposed in the lower portion thereof, and a float ball connected to the outlet through an open/close valve, whereby upon the change in the level of the liquid, the float ball is raised and or lowered which in turn moves the piston member which further opens or closes in a corresponding manner the outlet and the drain aperture.

Abstract: A liquid level sensor and controlling assembly disposed and mounted in direct communication with a reservoir of liquid to be monitored and including a float structure connected to an elongated stem formed of magnetic material which is disposed to selectively move, in accordance with the movement of the upper surface level of the liquid between a primary coil and a secondary coil. A constant voltage supplied to the primary coil results in a magnetic flux and a voltage being induced into the secondary coil based upon position of the magnetic material stem relative to the secondary coil thereby determining that the induced voltage in the secondary coil is directly related to the level of the liquid since the position of the magnetic stem within the secondary coil is controlled by the level of liquid within the reservoir.

Abstract: A liquid level control float valve which comprises a valve body, an open/close valve disposed in the valve body, the open/close valve being mounted on a gear shaft which extends from the inside of the valve body to the outside of the valve body and on opposite sides thereof, engaging members fixed to the gear shaft on opposite sides of the valve body, passive gears rotatably engaged with the gear shaft on opposite sides of the valve body and adapted to engage the engaging members after a selected portion of its rotation has taken place, driving gears mounted for rotational engagement with the passive gears, a float ball provide to determine the liquid level, and lever arms connected at one end to the float ball and at the other end to the driving gears whereby upon the change in the level of the liquid, the float ball is raised or lowered which in turn rotates the driving gears and the passive gears engaged therewith which further rotates the gear shaft and correspondingly the open/close valve.

Abstract: A water saving float for a water tank which includes a connector that connects the float to the cut-off rod. The float is adjustable for different settings so that the water height in the tank may be controlled. The adjusting device is out of the water so the hands do not get wet during adjustment.

Abstract: Improved ballcock float structures are provided including a molded, plastic, hollow body formed of cup-like lower and reverse cup-like upper parts. The parts are retained together by snap engagement between the extremities of the parts with positioning abutments for additional stability. A float guide extends vertically through the body having a vertical opening for receiving a ballcock or the like to be controlled by the float. Control of the float for controlling the ballcock is provided by two, tubular liquid vents secured in and extending upwardly from the lower part bottom wall and a similar liquid vent projecting downwardly through and from the upper part top wall. The liquid and air vents project into the interior of the body, but terminate spaced apart and the relative positions thereof determines the performance of the float.

Abstract: A device for controlling the flow through a suction pump to prevent loss of prime usable especially in narrow ditches and similar smaller areas, and consisting principally of a float controlled valve adapted to regulate the flow of fluid into the pump. The entire device is enclosed is a cylindrical casing adapted to be placed in a relatively small hole.

Abstract: A vacuum pump drain device for draining contaminating water from the oil reservoir of a vacuum pump. A valve regulates the flow of water through an outlet port disposed adjacent the water responsive to the level of the oil in the oil reservoir. Preferably, the valve includes a float attached to an outlet port seal by a shaft or the like.

Abstract: Apparatus is provided for controlling the level of steam condensate in a steam retort wherein sealed cans of food are exposed to incoming steam. The apparatus comprises a pneumatically actuated condensate drain valve which is controlled by a solenoid valve and opens to drain condensate if it reaches a dangerously high level, an alarm to indicate when the high level is reached, a recorder to provide a continuous permanent record of condensate level and drain valve status, and an electric control system for sensing condensate level and operating the solenoid valve, the alarm and the recorder in accordance therewith. The electric control system includes a condensate level sensor in the form of a one or more float-operated magnetically-responsive reed switches mounted in the retort. The sensor comprises a hollow stem in which a reed switch is potted in elastomeric non-displaceable material.

Abstract: A pool water regulator has two vertical pipes which indicate the pool water level. Each pipe has a floating element disposed therein, and each float element has a switch secured to a distal end protruding from the vertical pipes. Brackets are mounted adjacent the switches so that as the float elements rise and fall, the switches are turned ON and OFF thereby activating either pool draining or pool filling means.

Abstract: A liquid level control device for monitoring the level of water in a steam generating tank between predetermined upper, intermediate, and lower levels, with the tank equipped with a valve for introducing water into the tank and heat energy valve means to generate steam to the water, comprising: a glass gauge tube adapted to be vertically mounted exteriorally of the tank; a top and bottom cover covering the ends of the glass gauge tube, with a bottom cover including an opening for communicating with a liquid in the tank and the top cover including an opening for communicating with steam generated in the tank; upper and lower magnetic float means mounted co-axially within the glass gauge tubes; the upper magnetic float means including means to activate the valve when the water is the region of the predetermined intermediate level so as to introduce water into the tank until the water is in the region of the predetermined upper level, and to deactivate the valve and stop the introduction of water when the water

Abstract: A storage system with 100% secondary containment includes a rigid outer vessel, a flexible cell inner vessel and a spacer layer therebetween. The region between the outer and inner vessels is monitored for leakage through either the rigid outer vessel or the flexible inner vessel. A number of expandable positioning rings keep the inner vessel substantially inflated regardless of the amount of fluid within the inner vessel. Outlet openings are formed in the outer and inner vessels to permit the passage of fluid into and out of the inner vessel. To retrofit a rigid vessel in use, the vessel is emptied, a manhole opening is cut, the vessel is inspected and conditioned as necessary, and the inside surface is covered with a coating layer. A spacer layer is mounted to the coating layer to cover the inside surface of the outer vessel. Fluid detectors and a suction tube are mounted within channels formed in the spacer layer. The flexible inner vessel is placed into position within the rigid vessel and is inflated.

Abstract: Device for the automatic filling of battery cells with water comprises a filling cup (10) to be inserted into a battery cell and provided with a connection hose (20) for the water supply as well as a valve actuated by a float (62) fitted to a single centering guide rod (56) for easy movement and not susceptible to clogging up, the rod extending through an opening (58) in the bottom (60) of the cup housing (12) and hinged at its upper end to an amplifying lever (54) for the transmission of the float movement to the valve body (46), so that even in the remote possibility of heavy movement of the float guide, the lifting force of the float (62) is sufficient to actuate the valve.

Abstract: An overflow control system for use with home appliances such as washing machines, incorporating conventional stand pipe which receives the outlet conduit from the appliance, the stand pipe being provided with an attachment having a displacement, conductivity or a pressure sensor installed for sensing the height of liquids in the stand pipe. This stand pipe may be vertically connected to the sewage line outlet found in a home and the signals from the sensors may be used to shut off the power to the appliance and to excite an alarm. Connected in parallel with the sensors may be a moisture sensor deployed under the appliance which again shuts the power off whenever the machine is inadvertently filled beyond its limits or when leakage occurs.

Abstract: A horizontal water inlet tube is inwardly connected reversely through a valve within a horizontal valve housing and from the valve housing downwardly into a generally vertical water outlet tube. The valve is controlled by a valve control arm projecting generally horizontally from the valve housing downwardly connected through a float connector to a float vertically slideable on a float guide extending downwardly from the valve housing. A diverter at the upper end of the water outlet tube receives water flow generally horizontally from the valve housing into a pair of spaced, downward helical grooves directing the flow spirally into a pair of spaced vertical grooves for ultimate discharge downwardly through the water outlet tube. The diverter vertical grooves are larger in cross-section than the respective helical grooves and are formed by radial plates converging centrally to a cylinder at groove upper portions and an inverted cone at groove lower portions, each vertical groove occupying in the order of 120.

Abstract: A steam trap including a buoyant float member is equipped with a valve seat assembly which is closed by abutment of the float with a valve seat portion surrounding the flow orifice. The assembly is formed with a float abutment member made of carbide located adjacent the valve seat surface on the outer periphery thereof and located to serve as a contact point for the float member and to define a fulcrum about which the float may pivot when moving into and out of contact with the valve seat surface. The material of the float abutment member ensures a longer service life and a more secure closure of the flow orifice.

Abstract: An apparatus for venting and/or degassing a pipeline system includes an upwardly extending casing formed of a top part and a bottom part with a cap located within the casing and extending transversely of the upward direction in the region where the top part is connected to the bottom part. A valve is located in the upper end of the top part and has a horizontally extending valve needle projecting into the interior of the casing. A float needle is located within the top part of the casing and is in interengaged contact with the valve needle. A float is freely slidable on the float needle between the cap and the upper end of the casing. The top part of the casing and the float needle are dimensioned so that the float can move upwardly and downwardly on the float needle from the region of the cap toward the valve needle so that during a pressure increase within the casing up to a predetermined value there will be an accurate safety dimension maintained between the liquid surface in the casing and the valve.

Abstract: An overflow control system for use with home appliances such as washing machines, incorporating conventional stand pipe which receives the outlet conduit from the appliance, the stand pipe being provided with an attachment having a displacement, conductivity or a pressure sensor installed for sensing the height of liquids in the stand pipe. This stand pipe may be vertically connected to the sewage line outlet found in a home and the signals from the sensors may be used to shut off the power to the appliance and to excite an alarm. Connected in parallel with the sensors may be a moisture sensor deployed under the appliance which again shuts the power off whenever the machine is inadvertently filled beyond its limits or when leakage occurs.

Abstract: A fluid dispensing system for uniformly dispensing relatively small quantities of one or more coating fluids. Each coating fluid is disposed in a vertically oriented cylindrical container and divided from a Newtonian drive fluid by a split floating plug. The drive fluid is advanced into the cylinder by a positive displacement pump at a constant rate. The split floating plug facilitates degassing of the fluid and allows it to be substantially completely dispensed at constant rate. A plurality of containers may be connected in a battery to facilitate a rapid change in the compositional parameters of a multiple layer coating system.

Abstract: A magnetically-operated valve has a body provided with a passageway therethrough. A piston is mounted on the body for sliding movement toward and away from a valve seat. The piston has a magnetic pole at one end. A magnet is mounted on the body for movement between a first position, at which the piston will be held in a flow-permitting position, and a second position, at which the piston will sealingly engage the seat to terminate such flow. An override mechanism may be operated to displace the piston against the repulsive forces between like poles.

Abstract: A valve for use with a liquid comprising: a valve casing having an inlet and outlet; a valve seat arranged between the inlet and outlet; a plug adapted to be received on the valve seat; sensor means adapted to sense the level of the liquid, the sensor means being operatively associated with the plug so as to vary the position of the plug relative to the valve seat as a function of the level of the liquid; and a lever adapted to vary the position of the plug relative to the valve seat independently of the sensor means.A valve, for use with a liquid, comprising: a valve casing having an inlet and outlet; a valve seat arranged between the inlet and outlet; a plug adapted to be received on the valve seat; and a lever adapted to vary the position of the plug relative to the valve seat by means of a stem attached to the lever. The lever is attached to the stem by means of a pin attached to the lever, the pin being fitted within a fusible bushing fitted within a hold in the stem.

Abstract: An automatic water safety valve assembly having sensors adapted to be placed in various locations on the floors of a building so that an expandable element in each of the sensors having an electrically conductive plate expands when wetted to operate a circuit which causes the water safety valve to close and shut off the main water line to the building. The valve, when activated, also operates a power interrupter which deactivates the connections to the device from the AC power source.

Abstract: A flood control arrangement for dishwashers in which the in-flow to the dishwasher tub from the water supply line is automatically terminated in the event the tub water rises to a flood level. The arrangement includes a sealing plunger disposed in a plunger body member housing installed downstream of the water fill valve. The sealing plunger tends to be moved to the sealing position by the line water pressure to shut off in-flow to the dishwasher but is blocked from movement to this position whenever the water level is below the flood level by the stem of a float positioned in the dishwasher tub. When the water level in the tub approaches the flood level, the float rises in the tub to a position whereat the float stem releases the sealing plunger to allow it to move to the sealing position and shut off further flow to the dishwasher.

Abstract: A steam trap assembly is formed with a casing defining a valve chamber therein with an inlet for introducing fluid generally consisting of condensate and steam into said chamber and with an outlet for discharging condensate from the chamber. A bucket-type float freely movable within the valve chamber is formed with an outer surface portion adapted to engage and disengage a valve seat defining the orifice of an outlet passage through which condensate is discharged from said steam trap. The float is structured as a hollow shell member defining a downwardly directed opening and with a generally continuous body having a substantially spherical configuration extending to a mouthpiece member which is fitted in the opening of the spherical shell member to define the opening with a generally circular configuration. The mouthpiece member has a weight characteristic tending to bias the center of gravity of the float member downwardly toward the opening.

Abstract: A dishwasher employing a float assembly positioned in a centrally located sump in close proximity laterally and vertically to a horizontally rotating circulation pump impeller inlet area for accurately terminating fill when the liquid level rises slightly above the dynamic prime level thereby enabling lower water usage by eliminating the need to overfill to compensate for inaccuracies in liquid level control. A baffle partially encloses the float to prevent nuisance trips resulting from liquid turbulence in the sump caused by pump operation. A cover is provided over the float mechanism to prevent nuisance trips caused by overspray striking the float. In its preferred form the float assembly comprises a multi-chambered open bottom float portion and an inverted U-shaped stem portion. One end of the U-shaped stem is connected to the float. The free end is slidably supported in a vertical standpipe formed in the bottom of the sump.

Abstract: A level control arrangement for dishwashers in which the inflow to the dishwasher tub from the water supply line is automatically terminated when the water level in the tub reaches a predetermined level. The arrangement includes a two-stage level control valve disposed in a valve housing installed downstream of the water fill valve. The valve is moved into and out of engagement with the valve housing in response to a connector which in turn is in operative engagement with a stem of a float positioned in the dishwasher tub. When the water level in the tub approaches a predetermined washing level, the float rises in the tub to a position where the connector permits the valve to move to a sealing position, thereby terminating further flow to the dishwasher tub. When the water is drained from the tub, the float stem moves the connector thereby releasing the pressure exerted against the sealed valve through a port located within the valve.

Abstract: An improved float assembly for a dishwasher liquid fill system includes cam means on the float stem. The cam includes a first portion operative, upon the liquid rising to its normal fill level, to maintain a switch in its circuit closing position allowing the fill valve to be opened at selected intervals during the operational cycle. Upon the float being buoyed upwardly by the liquid level rising above its normal-fill level to an over-fill level the cam means is operative to retain the float at an elevated position permitting the dishwasher to complete its operational cycle after which the float may be manually reset to its lower position to again permit normal operation of the dishwasher.

Abstract: A float support includes a guide sleeve extending upwardly from a dishwasher chamber sump for slidable reception of a float stem. The support includes a hollow standpipe having an upper portion, partially defined by an external wall of the guide sleeve along part of its axial height, and a lower portion extending down through the sump in an offset manner. The inverted cuplike float includes a plurality of cavities at least one of which is adapted to entrap air to provide buoyance to the float. A remaining one of the cavities defines a combined float damping and overflow cavity which conceals the upper portion of the hollow standpipe such that the standpipe establishes an air break path between the overflow cavity and atmosphere thereby damping the vertical travel of the float.

Abstract: This disclosure pertains to a float, slideably confined within a tube and buoyantly positioned therealong as determined by the level of the water confined within a container such as a bathtub, swimming pool or the like. The float, upon reaching an upper position, closes a set of stationary contacts, which in turn, completes a series electrical circuit including an alarm bell and battery. Simultaneously with the closing of the contacts, an electrically operated solenoid valve, disposed in series with a pipe communicating to a water source used to fill the container, closes so as to halt any further increase in the water level within the container. Altering the length of the float, or varying the positioning of the contacts relative to the mouth of the container, adjusts the maximum level of water that may be disposed within the container.