Abstract: A liquid level indicating device for indicating a predetermined liquid level in a container includes a mounting member mounted on the container, a float movable with the level of liquid in the container and actuating an electrical switch when the float is at the predetermined liquid level in the container, and a coupling pivotally supporting the float on the mounting member and adjustable in orientation to permit the float to pivot in various planes. The coupling can be an angularly movable clutch such as a universal joint or a ball and socket joint or the coupling can be in the form of a resilient hinge.

Abstract: An apparatus is provided for discharging from a condensate sump large amounts of condensate as well as high viscous liquid by means of an electrically driven valve which is arranged at the outlet of the condensate sump and which is controlled to open and close in response to the position of a float whose location within the condensate sump is sensed by proximity switch means connected to operate the valve.

Abstract: A cap assembly for the reservoir of a vehicular brake comprising a cap body and a cap cover, the cap body including a first cylindrical portion adapted to be received in the opening of said reservoir, a flange integrally formed with and radially and outwardly extending from the first cylindrical portion and a second cylindrical portion extending from the side of the flange opposite the side of the flange adjacent from the first cylindrical unit; and the cap cover including a third cylindrical portion adapted to fit on the second cylindrical portion of the cap body and closed at one end; the second and third cylindrical portions having mating radial tongue and groove engaging means and the closed end of the third cylindrical portion covering the second cylindrical portion to thereby close the opening of the reservoir. A method for producing a cap assembly for the reservoir of a brake which comprises a cap body and a mating cap cover connected together by means of tongue and groove engagement.

Abstract: The present application presents a setup utilizing a float in an enclosed space as a bridging contact, on the basis of the liquid level in the area to control, to activate a semiconductor relay having a time delay for such activation, and is especially valuable where the liquid level involved is that of a non-conductive liquid under severe conditions.

Abstract: In a liquid level contents indicator for a vehicle hydraulic system of the float-operated electric switch type manually operable mechanism for testing the circuit comprises a push-button located in an end closure cap for a reservoir and the push-button acts on contacts of the electric circuit through a resilient diaphragm which also acts as a return spring for the push-button and provides a seal between the push button and the cap.

Abstract: A plastic vessel forming a float is secured to one end of a plastic tube. The other end of the tube is fixedly mounted and intermediate the ends is a hinge section. Two mercury switches are positioned in the vessel at different angles of inclination with respect to the axis of the vessel so that as the vessel pivots about the hinge with variations in the level of the liquid upon which the vessel floats, the switches close at different positions of the float. The angle of inclination of one of the mercury switches is adjustable.

Abstract: The float switch is for control of a submersible sump pump or the like and has a housing, a switch in the housing and with the switch having a spring control member extending therefrom to turn the switch on and off with movement of such control member, leads connecting to the switch and extending from the housing to the power controlled circuit. An activator arm is pivotally positioned in the housing for gravity actuated pivotal movement towards and away from the switch for engaging and moving the control member to switch closed position and to release it for switch opening action, the position of the activator arm being controlled by gravity and the float switch being permitted only limited movement with fluctuations in the water level in the sump by the leads secured thereto.

Abstract: A float unit having two float portions operates a switching unit to stop the supply of liquid at a selected high level and to reestablish the supply at a selected low level. The switching unit may be a precision snap-acting switch, and the float unit may be integrally formed from glass. In the preferred embodiment, the switch and an upper switch-engaging portion of the float are mounted in a housing which serves as a closure for a container.

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.

Abstract: A means to monitor the depth of water in a well and to prevent a pump from operating if the water level falls to a predetermined level, consisting of float and weight means operating a depth indicator and cutoff switch.

Abstract: A master cylinder assembly has a stamped steel reservoir and a cover in which a switch, appropriate electrical conduits, and a connector are integrally molded. A fluid level sensor float and rod are arranged to open and close the switch depending upon the level of fluid in the reservoir. A diaphragm seal is assembled to the underside of the cover and has a rod guide provided for the sensor rod. The guide also provides a suitable vent between the fluid chamber of the reservoir and the otherwise sealed space between the diaphragm and the cover. The cover has a peripheral channel receiving a peripheral mounting edge of the diaphragm so that the diaphragm also acts as a seal between the cover and the reservoir housing. The sealing action is primarily radial, between a channel wall and the reservoir housing wall, therefore not requiring the cover to be tightly clamped in place in order to compress a seal. The cover assembly is snapped into place on the reservoir housing.

Abstract: A combination monitoring and regulating instrument for oil field stationary engines or compressors receives oil by gravity in a float chamber having a float operated oil admission and shut-off valve and particle filtering means. Oil from the float chamber is delivered by gravity feed to the crankcase of the associated stationary machine. When the external oil supply is depleted, the resulting movement of the float in the float chamber will produce rotation of a sealed shaft which extends into an explosion-proof chamber of the instrument to move a float position pointer therein, and to simultaneously activate an ignition cut-off switch, or equivalent pneumatic valve means in the explosion-proof chamber to shut down the stationary machine. A convenient oil level sight gage is provided on the instrument.

Abstract: A swimming pool alarm system which is responsive to the height of waves resulting from unauthorized entry, and which includes provision for changing its sensitivity. An alarm circuit is provided with a switch having a plurality of stationary contacts spaces apart as a function of wave height, and another contact movable by a float positioned in the water. A switch is provided to select the stationary contact which corresponds to a preselected wave height of interest.

Abstract: A switch includes a self-heating thermistor which has a certain resistance value when exposed to a medium of low thermal conductivity and a thermally conductive solid for movement into contact with the thermistor to lower its temperature and change its resistance. The solid is moved relative to the thermistor in response to any mechanical movement such as a float responding to liquid level or the closure of a door.

Abstract: A fluid reservoir is partitioned by a diaphragm into a liquid phase portion and a vapor phase portion with the diaphragm being moved in accordance with the liquid level in the liquid phase portion of the reservoir. An operating rod mounted to move with the diaphragm is engaged by sensing means which operate to produce a signal indicative of liquid level in response to the position of the operating rod. The operating rod may be composed partially of electrically conductive material and partially of electrically nonconductive material in order to open and close an external electrical signal circuit in accordance with its position relative to the level of liquid within the reservoir.

Abstract: An oil level indicator for an automobile or other engine is provided with a float which is coupled to a generally vertical rod. The generally vertical rod is electrically conductive and is moved axially responsive to the position of the float. A stationary contact is selectively positioned in interfering relationship with the rod at a point along its axial travel. Touching of the rod and the contact completes a circuit indicating depletion of the oil level to some predetermined point.

Abstract: Apparatus for use with a sump pump that includes a submersible switch assembly for starting and stopping the pump automatically for removal of water from the sump. The submersible switch assembly includes a pivotally mounted float which contains a microswitch for starting and stopping operation of the pump according to the level of water in the sump. The float contains a raceway in which a gravity actuated roller element is located, and the trip arm of the microswitch extends into the raceway and is activated by movement of the roller element. The construction and arrangement of the trip arm and the raceway eliminates any likelihood that undesired hunting of the switch assembly will occur.

Abstract: A brake fluid reservoir is provided having a flexible sealing diaphragm closing an open end of a chamber for brake fluid. A cover retains the diaphragm on the chamber carries stationary contacts, and a movable contact responsive to movement of a fluid level float, which movable contact, at a predetermined low level of fluid in the chamber, bridges the stationary contacts to complete a low-level warning circuit. Preferably two chambers are provided having a single diaphragm and cover, but a set of contacts for each chamber.