Abstract: A dispensing device comprises a loading chamber (12), a dispensing chamber (14), located beneath the loading chamber, a gate or shutter (24) movable between a first open position and a second closed position to allow selective communication of the loading chamber and the dispensing chamber. The device further comprises a first indicating means in the form of a first indicator member (114) which is retainable in a first-retracted position when the gate or shutter (24) is in the closed position and which is displaceable to a second, extended position when the gate or shutter is moved from the closed position to the open position. The device further comprises second indicating means (116) which is actuable to display a second visible signal to indicate that the first signal has been observed.

Abstract: A bulk material storage bin has an upright wall supporting a plurality of vertically spaced indicators providing a person with visual information regarding the level of the bulk material in the bin. The indicators have bright color and dark color surfaces that are selectively displayed to provide a person with information of the level of bulk material in the bin. An actuator located in the bin cooperates with a motion transmission apparatus to move visual members to an ON position displaying the bright color when the bulk material engages the actuator and to an OFF position displaying the dark color when the actuator is free of bulk material. The motion transmission apparatus includes a rod movably retained on an O-ring held on a mount device secured to the side wall of the bin. A yoke supporting an endless flexible member mounted on the rod is connected to the visual members whereby movement of the rod moves the visual members between the ON and OFF positions.

Abstract: According to one aspect, embodiments of the invention provide a reactive display system comprising a display channel, data storage coupled to the display and configured to store pre-determined and reactive messages, a sensor configured to monitor at least one variable of an area within which the system is located, and a controller coupled to the sensor, data storage and the display, wherein the controller is configured to operate data storage and the display channel to display at least one pre-determined message in a first mode of operation, and wherein the controller is further configured to operate data storage and the display channel to display at least one reactive message in a second mode of operation in response to an indication from the sensor that the at least one variable has changed.

Abstract: A directional shockproof tilting display tag, comprising a container provided with a detector therein; the detector comprises a first placement chamber, a second placement chamber, and a baffle; the first placement chamber comprises a first side plate and a first mass block; the first side plate is externally provided with a first extension portion; the second placement chamber comprises a second side plate and a second mass block; the second side plate is externally provided with a second extension portion; the placement chambers are also provided with bar codes; part of the patterns of the bar codes are covered by the mass blocks; a rotary shaft is disposed directly above the placement chambers; the container is also provided with a shockproof structure therein. The display tag has a simple structure and strong shockproof capability. The arrangement of the bar codes ensures the detector can quickly detect an object tilting.

Abstract: Provided is a child restraint system (CRS) with automated installation that provides automated feedback and control of seat installation angle, belt latching and tightening, and confirmation of correct install. The CRS utilizes sensors to monitor CRS base angle relative to level, confirm correct latching of the CRS to its base and then to the vehicle seat, and confirm tightening of the belts to the required tension to be crashworthy. The stepwise operation and confirmation of the installation procedure may be operated via button(s) or other tactical input, and relayed to the user via electronic visual display and/or audible means. All operations will be overseen and processed by an integrated control system, affording minimal user decision or interface. An intelligent latching device which can be adapted for use with an existing CRS is also provided.

Abstract: The invention relates to a defect indicator for an electronic device, in particular a surge arrester, comprising at least two thermal overcurrent protection devices which respond to different fault or overload states and each have a mechanical actuating device for triggering the fault signalling, wherein the mechanical actuating device is in the form of a bolt or pin which acts on a fault signalling element. According to the invention, the at least two overcurrent protection devices are arranged relative to one another in such a manner that the direction vectors of the bolts or pins intersect in an imaginary extension of the movement path thereof, wherein the particular bolt or pin acts on a respectively provided surface side of a displaceable armature and the armature occupies a variable position in the movement path.

Abstract: Herein are described methods and systems for the automatic measurement of the mass of an object. An example method may begin with detecting by a computing device (such as a wearable computing device) an action that corresponds to a mass-measurement mode. In response to detecting the action, the computing device is caused to operate in the mass-measurement mode. The mass-measurement mode may involve receiving a motion-sensor signal from at least one motion sensor, determining a difference between a frequency-component magnitude of at least one given frequency component and a predetermined frequency-component magnitude, determining a mass of an object based on at least the determined difference between the frequency-component magnitude of the at least one given frequency component from the predetermined frequency-component magnitude, and causing an output device to provide an indication of the determined mass of the object.

Abstract: An indicator for an impact detector includes a plurality of display parts to display a detector to outside of the indicator when an impact or force changes a condition of the detector. At least one of the plurality of display parts is a dummy display part. The impact detector can be disposed on a package of a packaging container.

Abstract: A device and technique for impact detection includes a tube having a first fluid and a second fluid disposed therein, wherein a viscosity of the second fluid is greater than a viscosity of the first fluid, and wherein, responsive to a predetermined level of impact received by the impact indicator, at least a portion of the first fluid mixes into the second fluid to create a change in color of the second fluid to provide a visual indication of the received impact.

Abstract: A hanging pot water indicator having a hollow tubular spring housing, a dust protector on the upper end of the tubular housing, the dust protector having a fastening collar fitting around the upper end of the tubular housing, a hollow tubular sliding sleeve, having an interior diameter greater than the exterior diameter of the tubular housing, and being telescopically slidable in respect thereof, a lower flared portion on the lower end of the sleeve, an opening in the dust protector, a coiled extension spring within the tubular housing and the sleeve, an upper wire extension portion extending from the upper end of the spring passing through the opening in the dust protector, and defining an upper hook, and a lower wire extension extending from the lower end of the spring, and formed to define a hook.

Abstract: A g-force-sensitive label for detecting and indicating the application of a g-force is provided, the g-force sensitive label comprising an area for detecting and indicating an application of a g-force above a threshold value on the g-force sensitive label and an attachment area for attaching the g-force sensitive label on an object. At least one physical property of the area measurably changes its state upon applying a g-force above the threshold value, thereby altering a displayed pattern such that a machine-readable 1D or 2D or alphanumeric code is displayed.

Abstract: A handle integrated scale configured to fixedly attach to a liftable element that allows a user to ascertain the weight of said liftable element based on the amount of force exerted onto the handle integrated scale from the liftable element as it is lifted.

Abstract: An integral weighing device for determining whether the weight of a luggage container and its contents exceed a maximum allowable amount simply by suspending the container by its handle. If the container weighs more than a set amount the integral weighing device provides a visual cue that the container exceeds the predefined weight. The integral weighing device comprises a torsion spring mounted within a housing, and a cord attached to each end of the torsion spring and fed via a guide-way through and out of the housing to an externally accessible grip handle. An indicator arm is rotationally mounted to the housing. When a person lifts the luggage by the grip handle the force is transferred to the torsion spring causing angular deflection toward the indicator arm. If the container exceeds the set weight the indicator arm provides a visual cue that the bag exceeds the predetermined weight.

Abstract: According to one aspect of the present disclosure, a device and technique for tilt detection and indication is disclosed. The tilt indicator includes a first member having a reservoir for retaining a granular indicating media therein; and a second member coupled to the first member and having an adhesive portion located corresponding to an indicating area of the first member. Responsive to a tilt event, at least a portion of the indicating media exits the reservoir and travels to the indicating area where the adhesive portion retains at least a portion of the indicating media within the indicating area.

Abstract: The Global Gravitational Horizon (GGH) is a system of two concentric spheres, one affixed to the center of gravity, the other affixed to the aircraft, both in juxtaposition representing a reference so that a pilot can always know the exact flight attitude without having to rely on any complicated, vulnerable, and conventional flight attitude indicators. The GGH requires virtually no experience or training to understand, therefore will be extremely helpful to new and novice pilots as well as seasoned pilots who are desirous of having a constant real time reference to their position relating to the horizon/ground without having to worry about maintenance or failure.

Abstract: A lighted orientation device according to the present invention includes an outer housing having a construction that is resilient, generally spherical, and defines an interior space for holding fluid. A directional indicator such as a float is positioned within the outer housing and rises to a top surface of the fluid for indicating an upward direction. The float is also constructed of a resilient material and includes first and second chemicals separated by a breakable membrane. The two chemicals react when combined to produce light, whereby a user may view the float and ascertain which direction is “up”. The lighted orientation device may be coupled to a digging tool according to an alternative embodiment such that a user may begin digging out of an avalanche as soon as their orientation is determined.

Abstract: A weighing device (10) for providing a indication of the weight of a piece of luggage (5), the device comprising load bearing means (11) adapted to be placed on or form part of the carry means of the piece of luggage (H) and indicator means (19) associated with the load bearing means whereby when the luggage is lifted by the carry means (H), the load bearing means is subjected to the mass of the piece of luggage and the indicator means provides an indication of the weight of the piece of luggage.

Abstract: A mail delivery indicator system comprises a minimum number of parts, namely, an indicator flagstaff with a flagged end and a weighted end, a sidewall mounting bracket and a latch element. A pivotal bolt attaches the indicator flagstaff to a side wall mounting bracket, which is then attached to a side wall of a mailbox. When the mailbox front door is opened, the latch element releases the flagged end to traverse rotationally backward away from the mailbox front door by the force of gravity associated with the weighted end of the indicator flagstaff. A weight element pivotally attached to the weighted end of the indicator flagstaff controls the traversing motion of the indicator flagstaff to a generally vertical signaling position to display the indicator flag above the mailbox, visible from a variety of directions. One can use one hand to lower the flagged end to the latch element on the mailbox front door to reset the mail delivery indicator system.

Abstract: A freezer failure indicator assembly is provided comprising an indicator unit in the form of a closed container party filled with an opaque liquid (1) and a support bracket (8) therefor. The container has an opaque zone (2) and a transparent zone (3) arranged to enable the liquid to be pre-frozen within the opaque zone followed by re-orientating the container relative to the bracket to render the transparent zone of the wall visible, devoid of any liquid and lower than the pre-frozen liquid. Thawing of the pre-frozen liquid causes it to move to become visible through the transparent zone. Colour imparting means (13) are carried by the bracket so as to be visible through the said transparent zone in the operative position thereof to thereby impart a first colour to the transparent zone in the absence of any liquid being present in it. The opaque liquid serves to obscure such first colour when the liquid is present in the transparent zone.

Abstract: A visual device placed on a water ski that enables easy detection of the ski in various water and weather conditions. A reflective red flag attaches to a flexible spring that is attached to a rotator. A second spring attached to the rotator is connected to a counterweight to balance the flag. The rotator is rotatably coupled to a bracket that attaches to a water ski. In use, the device bends out of the way as to not interfere with the performance of the water ski. When the ski is not in motion, gravity causes the counterweight to move the flag to an upright position to allow visual detection of the ski.

Abstract: An apparatus for indicating correct or faulty back posture comprises a housing and an indicator body. The housing is supported on the user's body. When the user's back posture or head position is incorrect, the indicator body moves and signals the user of the incorrect posture or position, e.g., through an audible alarm.

Abstract: A shock force indicating device for measuring and visually displaying the extent of a shock force received by an article during handling of the article is disclosed. The device has a cavity formed between a base member and a top member having a raised portion. A bearing is disposed within the cavity. In a preferred embodiment, the top member and the base member provide a compressive force to the bearing such that the bearing is held in place until the device is subjected to a shock force greater than a predetermined threshold. The base member has a pressure sensitive material which provides a visually identifiable path which traces the movement of the bearing when the bearing moves in response to a shock force to the device. The base member may have indicating marks for representing a scale with which to measure a component of a force to the device. The top member is transparent for easy viewing of the indicating marks.

Abstract: An improved mail box signal comprises a case having a slide disposed therein. A catch on the slide engages a detent on the case interior and the slide hangs suspended from the detent when the case is in a substantially vertical orientation. When the case is rotated forward to a substantially horizontal position, the catch and detent disengage, freeing the slide to fall when the case is returned to the vertical. In embodiments, the device may allow the slide to partially project from the bottom of the case or may allow the slide to fall from the case, and/or hang suspended by a tether.

Abstract: A holder and/or a holder and cover for containing a dispenser of a consumable product, such as a cartridge containing pressurized gas for therapeutic use, and a method for selecting the optimum parameters for such holder are provided to allow sensitive determination of the amount product remaining in the dispenser. The holder has a curvilinear or partly curvilinear circumference, and holds the dispenser so that the center of mass of the dispenser and the product it contains is at a predetermined optimum location relative to the center of mass of the holder. Thus, when the holder is placed on a horizontal surface, the holder can roll along the curvilinear circumference, and the predetermined optimum relationship of the center of mass of the dispenser and the center of mass of the holder causes the holder to come to rest at adequately spaced unique locations on the circumference of the holder depending upon the combined mass of the dispenser and the product it contains.

Abstract: A new and improved apparatus is disclosed for reminding people to water a house plant. A user would hang a house plant from an eye hook located at the bottom of the bottom of the present invention, and an included readout would indicate when a user would need to water the house plant. The top half of the readout would be red and would not be visible when the houseplant would have sufficient water. The lower half of the readout would be green and would be visible through the bottom of the apparatus when the would have sufficient water. However, the top half of the readout would start to become visible through a transparent central portion of the apparatus when the houseplant would need to be watered. At the same time, the bottom half of the readout would be pulled into the apparatus and would gradually disappear as the need for water for the houseplant would increase.

Abstract: A holder and/or a holder and cover for containing a dispenser of a consumable product, such as a cartridge containing pressurized gas for therapeutic use, and a method for selecting the optimum parameters for such holder are provided to allow sensitive determination of the amount product remaining in the dispenser. The holder has a curvilinear or partly curvilinear circumference, and holds the dispenser so that the center of mass of the dispenser and the product it contains is at a predetermined optimum location relative to the center of mass of the holder. Thus, when the holder is placed on a horizontal surface, the holder can roll along the curvilinear circumference, and the predetermined optimum relationship of the center of mass of the dispenser and the center of mass of the holder causes the holder to come to rest at adequately spaced unique locations on the circumference of the holder depending upon the combined mass of the dispenser and the product it contains.

Abstract: A mailbox delivery indicator for a standard rural mailbox signals to a resident when the mail carrier has been to his mailbox. When the mailbox door is opened, an actuator arm extends and pushes an active signaling element, causing it to fall by gravity to a hanging position below the mailbox. Once the active signaling element has fallen, a passive signaling element is exposed for remote observation. The active signaling element in the hanging position together with exposure of the passive signaling element indicate to the resident that the mail carrier has been by his mailbox. At this time, the resident can check his mailbox without wasting a trip to the mailbox. After the resident checks his mail, he closes the door and resets the active signaling element to the covering position.

Abstract: An en route package apparatus and methods for operating the same comprise a reservoir having a fluid, a tilt indicator section having an X direction indicator including an X capillary coupled to the fluid in the reservoir, a Y direction indicator including a Y capillary coupled to the fluid in the reservoir, and a Z direction indicator including a Z capillary coupled to the fluid in the reservoir wherein the fluid from the reservoir flows through one of the X capillary, Y capillary, or Z capillary to a respective corresponding direction indicator in response to tilting the en route package sensing apparatus in a direction corresponding to the particular direction indicator.

Abstract: A shock-activated, sonic alarm is silent when in an armed or cocked condition. In this condition, a spring-loaded lance (108) is restrained by a ball (104) from activating an alarm (100). When the alarm is tilted, or dealt a sharp blow, the ball (104) is dislodged and frees the lance (108) to pierce a membrane in a gas cylinder (102), resulting in a loud alarm. Alternatively, a normally-closed switch (208) is held in an open condition by a ball (204). When the ball (204) is dislodged from its position on the plunger (207) of the switch (208), a buzzer (212) is activated, resulting in a loud sound. The alarm can be placed in any location where it is desirable to sound an alarm in response to a physical trauma, such as in a traffic barrier or dangerous goods shipment.

Abstract: A signaling device is mated with a conventional container to develop a change in state for indicating that the container has been accessed. In conjunction with a refuse container having a body and a cover connected to the body of the container by a hinge, the signaling device takes the form of a flag which is coupled with the hinge of the container so that the flag can move between a lowered position in which the flag lies over the cover of the container, and a raised position in which the flag extends upwardly from the container, providing the desired change in state. In use, the flag is automatically moved from the lowered position to the raised position when the cover is opened, signaling that the container has been accessed. The flag is automatically returned from the raised position to the lowered position as part of the procedure which is used to later empty the container.

Abstract: The invention relates to a device (1) for placing on a person's head (2) to indicate correct or incorrect upright posture during the performance of various activities in a standing or sitting position. The device comprises a balance element consisting of a fixed body (4) which is firmly secured to a headband or similar for attachment to the head (2), and a moveable body (5) which is translationally moveable relative to the fixed body (4), essentially in a plane parallel to or coincident with the main plane of the fixed body (4), whereby the moveable body (5) is designed to move translationally relative to the fixed body (4) when a certain degree of deviation from the correct head position occurs.

Abstract: A sludge gauge for measuring the depth of a sludge layer covering a bottom of a septic tank. The sludge gauge has a guide sleeve mountable through a septic tank cover and a probe, at least an upper end of which is slidably received in the guide sleeve. The probe has a base end distal an upper end. The density and base end configuration of the probe are selected to cause the probe to sink through a liquid layer in the septic tank until the base end settles on the sludge layer when the probe is released from a raised position. A cap is securable over an upper end of the guide sleeve and a collapsible connector extends between the cap and the probe for raising the probe into the raised position. An indicator is attached to the cap for indicating a height of the base end of the probe above the bottom of the septic tank thereby indicating sludge depth in the tank.

Abstract: A sensing device and sensing process is described for indicating movement of earthen material adjacent a structure. The preferred device includes a tubular frame including a top end and a bottom end. An anchor is configured to suspend the frame from the structure with the bottom end oriented toward the earthen materials. An actuator is releasably mounted on the bottom end of the tubular frame, spanning the bottom end and configured to rest against and be supported by the earthen materials. The actuator is movable in response to movement of the earthen material relative to the structure from an inoperative position engaging and spanning the bottom end of the tubular frame to an operative position spaced from the inoperative position. A signaling device is mounted within the tubular frame and connected to the actuator.

Abstract: A guide device for attachment adjacent the rear of a boat trailer to assist the driver of a towing vehicle in backing the unloaded trailer into the water. The guide device includes a mounting bracket for attaching the device onto a rear part of the boat, such as onto the front face of the rear lateral frame member, and a signal member mounted on the bracket and pivotal between raised and lowered positions. The signal member includes an elongated staff above the bracket and a flotation element attached to the lower end of the staff beneath the bracket. The flotation element is lighter than water, and has a weight greater than the weight of said staff. When the trailer is out of the water, the staff is pivoted by the weight of the flotation element to a generally vertical position. When the rear of the trailer is backed into the water, the flotation element rises to pivot the staff to a generally horizontal position.

Abstract: A child seat has an upper base section (1) and a lower base section (201) for changing an inclination angle between these base sections. The upper base section 1 and the lower base section (201) are journaled rotatably about a common journal axis (201A) at the front portion of the base. At a rear end side, an inclination angle changing mechanism (200) is installed for adjusting a spacing between the upper base section (1) and the lower base section (201) opposite the journal axis (201A). This structure provides a child seat allowing adjustment of the angle of inclination of a support surface supporting a child even if the child supporting surface extends lengthwise of a passenger car seat to which the base formed by the two base sections 1 and 201, is attached. This leveling of the child supporting surface is possible if the child seat (2) is rotatable about a vertical axis relative to its base.

Abstract: A motion sensitive animated advertising device for mounting to a moving vehicle. The present invention comprises at least one moving element having two stable positions wherein the movement of the vehicle causes the element to shift from one stable position to the other stable position.

Abstract: A combination flight simulating mobile device and scale formed in appearance of a variety of different birds, or like flying creatures, that may be fabricated from steel sheet or like material, readily assembled, and balanced in such manner that when suspended, the weight of the wings (12 and 14) of the bird is used to counterbalance both the body (10) of the bird and the weight of a lightweight object (74), such as an envelope, and provide a measurement of the object's weight and a realistic replication of a creature in flight.

Abstract: An airflow test device designed to be used in a clothes dryer. The device includes a retainer which is mounted to an outlet grate of the dryer drum. A vent card is removably supported a predetermined distance from the outlet grate by a support finger extending from the retainer. The vent card is supported in such a manner that a predetermined rate of airflow through the outlet grate during dryer operation moves the vent card toward the outlet grate. Movement of the vent card toward the outlet grate and off the support finger during clothes dryer operation signals that an adequate rate of airflow is passing through the outlet grate.

Abstract: A balance mechanism incorporates the housing of an aerosol delivery device which accepts and supports a cylindrical medicament cartridge. An unstable balance mechanism produces a definitive toggling action between mechanical states at the specified depletion level at which reliable dosage metering is no longer assured. In one embodiment, a fulcrum structure is formed in one side of an inhaler housing that causes the housing and the cartridge to pivot or rotate about an axis to indicate the depletion of the useful mass of the contents of the cartridge. In this embodiment, the rotation of the housing and cylindrical container is about the pivot axis located at the apex of the fulcrum formed in the housing when the housing is supported on a horizontal surface.

Abstract: An end of life monitor apparatus for a filter that removes an undesirable gas including: (a) an elastic material, which degrades in the presence of the undesirable gas; (b) a support member coupled to the elastic material; and (c) an indicator component movable to a filter end life position, coupled to the elastic material, whereby the elastic material is stretched between the support member and the indicator component, wherein the indicator component is biased to move to the filter end life position but is restrained by the elastic material from moving to the filter end life position, wherein degradation of the elastic material allows the indicator component to move to the filter end life position.

Abstract: A signaling system includes a rotatable arm connected to a dock. One end of the arm has secured thereto two signaling paddles of distinct visual indicia. The other end of the arm is biased against the underside of a lip plate of a dock loader. As the lip plate is pivoted relative to the dock, the arm is rotated, thus rotating the signaling paddles attached thereto.

Abstract: A valve position indicator for on/off valves includes a card having red and green sectors journalled in a housing, and gravity biased to remain stationary during rotation of the housing about a non-vertical axis. A cover of the housing overlies the card and includes a window through which either the red or green sector is visible. The device may be mounted within a recess of the handle of an on/off valve to indicate correct and incorrect positioning of the valve. The valve is in the correct position when the green sector appears on the window and is incorrectly positioned when the red sector appears in the window. A locking tab projects from the housing and is received within one of two detents of the valve handle to align the window with either the red or green sector, respectively, when the handle is moved to the open position and vice versa.

Abstract: A utility pipe displacement sensor comprises a protective housing and an indicator stick disposed in a vertical position within the housing. The indicator stick is capable of displacement within the housing and is maintained in its vertical position within the housing by the use of centralizing discs or nails. The sensor is arranged in such a manner that the lower ends of both the housing and the indicator stick are in communication with the outer surface of a buried utility pipe. Due to this arrangement, any displacement of the utility pipe is translated into a visually perceptible displacement of the indicator stick within the housing. Thus, any displacement of the utility pipe can be determined by determining the position of the indicator stick with respect to the housing.

Abstract: A bridge failure alarm system designed to be used with bridges has a plurality of spans across the length of the bridge, activates an alarm whenever the distance between any two adjacent spans is greater than a predetermined safe distance. This is accomplished by providing a conduction path extending from one end of the bridge along a first side of the bridge to the other end of the bridge and then back to the first end of the bridge by a conduction path located on the other side of the bridge. Between every expansion joint located between each adjacent span of the bridge are two jumpers to provide electrical connection across the expansion joints, one jumper located on each side of the bridge proximate to each expansion joint. In this manner, should any one of the expansion joints exceed a predetermined width placing two adjacent spans at a distance greater than the predetermined safe distance, at least one of the jumpers located therebetween will break the conduction path causing the alarm to be activated.

Abstract: A containment vessel for liquid waste including an inlet for introducing liquid waste into the container, and a coating of a gelling substance adhered to the interior surface of the vessel by an adhesive which dissolves when contacted by the liquid waste to release the gelling substance and thereby transform the liquid waste into a non-pourable gel. A tip indicator indicates if the vessel has been tipped after the vessel has been put into service. Also, an in-service indicator indicates that the vessel has been put into service and that the tip indicator has been released. A full indicator indicates when the contents of the vessel reaches a predetermined level of fullness. A vent for venting the interior of the vessel during filling of the vessel is automatically closed off when the vessel has reached such predetermined level of fullness. The inlet to the vessel may be connected to a drain opening of an embalming table by means of an expandable tube which allows for adjustment of the height of the table.

Abstract: An indicator particularly useful for indicating the increase in temperature for a bus bar joint, includes a first sheet-like member hingedly attached to a second sheet-like member. The first member is magnetically or adhesively attached to the bus duct cover. The second member is attached to the first member by a heat-sensitive adhesive. When the adhesive loses its adhesive properties upon reaching a predetermined temperature, the second member pivots down from the first member to provide an indication of an abnormal bus bar joint temperature.

Abstract: A fluid sensor for heat exchanger system includes a supporting device such as a tubular hose fitting for mounting the sensor in the system so that heat exchanging fluid circulated in the system comes into contact with the sensor. A window or sight glass is mounted in the supporting device along with corrodible separating means interposed between the sight glass and the heat exchanging fluid. A visual indicator such as a movable flap or a colored ball can be viewed through the sight glass when the separating means is ruptured or broken by corrosion. The viewing of the indicator provides an indication that the heat exchanging fluid has reached a certain corrosive state and requires replacement or treatment. In a preferred embodiment, the separating means is a metal diaphragm spaced from the sight glass.

Abstract: A water gauge in accordance with the invention includes a base and a spherical indicator ball. The base includes a container having a side wall, a bottom wall and a post. The spherical indicator ball has a yellow initial signal hemispherical wall and a red final signal hemispherical wall connected to an axle along a circumference. The axle is supported by the side wall of the container. The yellow initial signal hemispherical wall is heavier than the red final signal hemispherical wall. The spherical indicator ball has a channel in the middle of the red final signal hemispherical wall. Initially, the post is positioned into the channel so that the yellow initial signal hemispherical wall is up and visible. The water gauge is positioned on a lawn to be watered. When watering has added a sufficient amount of water to the container to float the ball above the top of the post, the ball is rotated by gravitational force to position the heavier hemispherical wall in the water.

Abstract: A rudder position indicator attachable to the steering wheel of a boat for rotation with the wheel, in which a ball, held in a substantially constant position by gravity, rolls in a spiral groove as the wheel and the indicator are turned. The ball is seen against indicia in the groove, the indicia locations being indicative of the position of the steering wheel.

Abstract: A tilt indicator includes a plurality of compartments with one or more compartments having an indicator inside. An exit from each compartment permits one or more indicators to leave. As the degree of tilt increases, the absence of an indicator in one or more compartments will indicate the degree of tilt.