Abstract: A control system for a pneumatic valve actuator comprising three operating blocks memorizing respectively the values of the spring pressure p.sub.m, the counter-thrust pressure p.sub.c and the friction pressure p.sub.a for the various valving member position values, said blocks being connected in parallel and, via a switch, to the valving member position transducer or to the set position generator and connected to the pressure computing block connected via a second switch to the pressure generator or, together with the value read by a transducer for the pressure existing in the actuator, to a differentiator connected to two multiplier units for K and for (1-K) respectively, which are connected to the transit memory of the p.sub.c operating block and to the p.sub.a operating block respectively, the switches being driven by a logic control unit which switches over when the valving member is at rest. Means are provided for sensing anomalies and the extent of wear.

Abstract: A method and apparatus for measuring and monitoring the axial load or thrust on the valve stem of an air operated valve assembly. The top end of the valve stem is connected to bottom end of the valve actuator drive shaft by a marriage block connector member having a plurality of strain gages capable of generating an electrical signal representative of the axial load or thrust on the valve stem. The marriage block connector member is also provided with a gage capable of generating an electrical signal representative of the axial position of the valve stem. The apparatus and methods disclosed are used for valve diagnostic testing from a remote location or for a valve control system.

Abstract: A method and apparatus for managing water consumption and preventing damage to a fluid supply system in a house or structure is disclosed. The water management system includes a water management device coupled between provided fluid flow, pressure, and temperature sensors, and a shut-off valve and a drain valve. The device includes flow control means for opening the shut-off valve when flow is detected at any flow sensor and closing the shut-off valve when flow is undetected. The device also includes flow timers which have a selected operational period for each flow sensor and which close the shut-off valve if the operational period of a flow sensor is exceeded. The device also includes temperature timers for closing the shut-off valve and opening the drain valve when a temperature at or below a minimum temperature is detected by the temperature sensor for a selected maximum temperature detection time period.

Abstract: A modular valve field convertible between a wet and dry configuration including a valve body and a passage within the valve body for allowing fluid to flow therethrough. A valve seat and clapper are positioned within the valve body. The clapper is allowed to pivot between a first position wherein the clapper is sealingly engaged with the valve seat and a second position wherein the clapper is spaced from the valve seat to allow fluid to flow through the valve. The operator controls the position of the clapper with respect to the valve seat. An operator securely retains the clapper in the first position in a first mode of operation and allows the clapper to freely move between the first and second positions in a second mode of operation. A controller governs the position of the clapper with respect to the valve seat when the operator is in the second mode of operation.

Abstract: Multiphase fluid flow, such as gas and water, is controlled to provide splitting the flow from a supply conduit into one or more branch conduits with a predetermined gas-to-liquid ratio in the branch conduits by providing a flow mixing device interposed in the main conduit at the intersection of the main conduit with the branch conduits and a variable area orifice provided by a sleeve type closure member to effectively regulate the gas-to-liquid ratio entering the branch conduit. Gas to liquid ratios may be varied by providing the branch conduits as swivel connections to the main conduit so that the entry portion of the branch conduit may be oriented vertically upward or downward or at a selected position in between. Gas-to-liquid ratios may be measured by flowmeters and differential pressure gauges located upstream and downstream of the intersections of the branch conduits with the main supply conduit or manifold.

Abstract: A data acquisition system (1) by which environmental parameters proximate to plant installed valves (2) may be monitored, recorded and correlated with other valve operating data. The system includes sensors (8) for sensing environmental parameters such as gas/vapor concentration, temperature or humidity. The system also includes sensors for sensing changes in the actuating variable (34) and sensors for sensing valve stem displacement (58). The sensors (8, 34, 6) generate electrical signals proportional to the value of the sensed parameter. First data interface equipment (32, 42, 43) is provided for digitizing the sensed actuating variable as the actuating variable is changed to displace the stem, preferably a full stroke from the open-to-close-to-open positions or vice versa. Second data interface equipment (7, 45) is provided for digitizing the sensed environmental parameter as the stem is displaced. Third data interface equipment (6, 45) is provided for digitizing the sensed stem displacement.

Abstract: A long heating pipe is laid along a conveyor pipe and in contact with the outer surface thereof. The heating pipe is provided with an outer tube which has an operating fluid hermetically contained therein, and a steam tube which is inserted through the outer tube. A container is provided to accumulate condensation created as a result of the liquefaction of vapor fed through the steam tube of the heating pipe. This container has a temperature sensing valve located therein. The temperature sensing valve is closed if the condensation within the container more rises in temperature than predetermined, and this valve is opened if the condensation within the container more decreases in temperature than predetermined. This temperature sensing valve is communicatively connected to the downstream side end portion of the steam tube of the heating pipe, which is inserted into the container.

Abstract: A valve block, in particular for aggressive fluids and/or fluids of increased temperature, includes a plurality of valve cartridges and an adapter for attachment of the plurality of valve cartridges. The adapter includes passageways for communication with each individual valve cartridge. The adapter is made of plastic material through an injection molding process and includes fittings for attachment of hoses, with the fittings being injection molded and fixed to the adapter through ultrasonic welding. At a location before and behind each valve cartridge are metallic electrodes fitted in the adapter and electrically connected to an analyzer so as to form an electric circuit which is closed by the electrically conductive fluid in order to allow each valve cartridge to be monitored for leaks.

Abstract: A non-intrusive method for timing the full operational motion of a valve plug (26) in an electrically actuated, pneumatically operated valve (10). An actuation signal is sent to the valve actuator (54). A coil of wire (68) around the valve actuator solenoid (56), an accelerometer (70) on the solenoid slug (64), or a connection to a permanent pressure sensor (72), non-intrusively senses arrival of the actuation signal at the valve. The time measuring equipment (12) begins timing when the actuation signal is sensed. A laser valve motion sensor (74) then non-intrusively senses when the valve plug reaches a limit of motion. The time measuring equipment ends timing when the valve plug reaches a limit of motion. The time measuring equipment then records the elapsed time from the sensing of the arrival of actuation signal to the final limit of motion of the valve plug.

Abstract: A system by which a supplier of wet steam may allocate and measure the mass flow rate and quality of steam delivered to a demand user and one or more secondary users with the wet steam delivered to each user being measured for purposes of billing. Pressure regulator means between the demand customer and the secondary customers responsive to pressure changes caused by the amount of steam going to the demand customer. The demand customer thus being able to take from 0 to 100% of the steam generator output with the remaining steam being allocated to the secondary customers.

Abstract: A pressure regulating unit for providing controlled pressure for use in displacing syrups in a carbonated beverage dispensing system, the unit including a block made of a single piece of metal and having mounting structure integrally provided thereon and a high-pressure gas flow passage provided therein and having a high pressure inlet, the unit also including pressure regulators that are supported on the block and have gas inlets communicating with the high-pressure gas flow passage.

Abstract: A modular valve field convertible between a wet and dry configuration including a valve body and a passage within the valve body for allowing fluid to flow therethrough. A valve seat and clapper are positioned within the valve body. The clapper is allowed to pivot between a first position wherein the clapper is sealingly engaged with the valve seat and a second position wherein the clapper is spaced from the valve seat to allow fluid to flow through the valve. The operator controls the position of the clapper with respect to the valve seat. An operator securely retains the clapper in the first position in a first mode of operation and allows the clapper to freely move between the first and second positions in a second mode of operation. A controller governs the position of the clapper with respect to the valve seat when the operator is in the second mode of operation.

Abstract: A five valve manifold for use with a pressure sensing apparatus is disclosed. It has an integral body having a first face, a second face, parallel with the first face. A peripheral wall section, spans the distance between the first and second face sections. The distance is smaller than at least one of the width and the length of the second face section. A passage system within said body and includes a plurality of mutually intercommunicating passages extending from one said face to the other. A set of five valves operates selective opening and closing of the passages. The centers of the instrument outlets at one face are suited to new type of "smart" pressure transmitters, while the inlet ports at the other correspond to the usual spacing used in the industry. The invention eliminates the use of a so-called parallel flange used by the manufacturers of pressure transmitters to accommodate the difference in the centers of connecting ports of the instrument from that previously used by the industry.

Abstract: A method and apparatus for monitoring and analyzing the performance of a recirculation control system are disclosed. According to the invention, the pressure of the liquid passing through the control system is measured directly by pressure and differential pressure transducers at the main inlet, main outlet, and, within the regulation means of the control system. Where the means for regulating the flow of liquid to the recirculation outlet comprises a piston within a piston chamber, the pressure of the liquid within the regulating means is measured in the piston chamber. The pressure data is analyzed to determine valve performance.

Abstract: A seismic activated gas valve includes a valve body defining a vertically oriented interior chamber having a input port formed in the upper portion thereof and an output port formed in the lower portion thereof. A magnetical ball retainer is supported in the uppermost portion of the valve body and supports a steel closure ball by magnetic attraction under normal conditions. An annular steel washer and a spaced apart magnetic washer captivate a sealing O-ring to form a valve seat between the input port and output ports of the valve body. Under conditions of substantial seismic activity, the steel closure ball is separated from the magnetic ball retainer and falls downwardly through the vertical chamber and comes to rest against the valve seat in a sealing attachment. The magnetic washer beneath the sealing O-ring attracts the steel ball and resists subsequent reopening of the valve due to vibrations imparted to the closure ball.

Abstract: A valve stem driving apparatus comprises a valve stem which has first and second ends, the second end being connected to a valve body. The valve stem is engaged with a stem nut. A distance measuring device is provided in an upper cover for the valve stem and measures a distance between the upper cover and the first end of the valve stem, so that wear rate of the valve stem and/or the stem nut is determined.

Abstract: An irrigation control device, comprising a primary water supply tube for operable connection to a pressurized water source, a plurality of water manifold pipes extending horizontally from the supply tube having formed along the tops thereof a plurality of apertures, a manifold seat for water-tight connection with each of the apertures and including an upwardly opening receptacle in flow communication with the supply tube, a plurality of rotameters arranged upright for receipt in the receptacles, each rotameter including a base through which is formed a passageway for receipt of a flow of water, a transparent water tube extending upright therefrom having formed therethrough a vertical passageway and a weighted element therein positionally responsive to the flow of water therethrough, and an outlet nozzle located above the valve for connection to a water line to convey the controlled flow of water to areas requiring irrigation and, a cabinet for housing the manifold pipes and the rotameters, including an access

Abstract: The monitor allows for the non-destructive determination of the status of a liner disposed within a conduit. The conduit may, for example, be an elbow, valve, pipe. At least one wire is disposed within the liner in an area of concern. The wire is connected to a receptacle located on the conduit. A status display plugs into the receptacle and checks the continuity of the wire. If a wire is broken, this information is displayed, indicating a potential problem with the liner.

Abstract: A valve operating mechanism produces a rotating force for causing a valve body of the valve to shift relative to a valve seat thereof, so that the valve is opened and closed. A piston of the mechanism produces a rectilinear reciprocating force. A screw member is supported moveably along the rectilinear line and unrotatably in the housing and includes a pair of pawls helically projecting along the rectilinear line and a helical interval space defined between the helical pawls. A pivot is inserted into the helical interval space. A cylindrical rotating member is supported rotatably and unmoveably along the rectilinear line in the housing so as to surround the screw member. When the screw member receives the rectilinear reciprocating force to perform the reciprocating motion along the rectilinear line, the pivot is urged to rotate along the helical interval space in the rectilinearly unmoved state, and the cylindrical rotating member can rotate with the pivot.

Abstract: A multi-orifice plate for use in a modified orifice fitting and a differential pressure-operated, mechanical valve and piston system for vertically adjusting the multi-orifice plate to facilitate recordation of various line pressures on an appropriate recording meter. In a preferred embodiment two or more pressure recording meters are fitted with corresponding meter valves and a common pressure selector valve, along with a spring-loaded plate piston connected to the multi-orifice plate, to facilitate operation of the plate piston and vertical shifting of the orifice plate, alignment of an orifice of selected diameter in the line bore of the orifice fitting and reading of a corresponding recording meter responsive to automatic operation of the pressure selector valve and meter valves. Fully automatic adjustment of the multi-orifice plate may be effected by implementing a remote, radio-operated transceiving unit to actuate a pneumatic switching valve and actuate the pressure selector valve and plate piston.

Abstract: An electro-mechanical mixing faucet for proportionally mixing hot and cold water in accordance with a user-selected mix ratio. A user-adjustable temperature selector produces a mix signal which adjusts hot and cold water valves to permit flow in amounts which will produce the desired temperature. The temperature selector includes a bank of LED's for indicating the selected temperature. When a user actuates the temperature selector, the LED's turn on brightly to indicate the selected temperature and also the water is immediately turned on. Following use of the faucet, the temperature selection is returned to a neutral temperature after a dormant period. An LED flashes when all hot water is demanded.

Abstract: Contained in the feed gas line (4) and in the dosing gas line (24) of an injector (2) is a pressure setting instrument (6, 26) each which is adjustable with regard to its outlet pressure. A gas flow instrument (46) displays the entire amount of feed air and dosing air flowing per unit of time. This makes it possible to change the pressures of the feed air and the dosing air while nonetheless keeping the entire gas quantity in the powder/gas flow in a simple way at a desired value.

Abstract: This device is an automatic faucet with three temperature settings activated by a pressure switch which is mounted on or near the floor by the user's foot. The invention includes a device which will, after a period of time, automatically turn the water off after the switch has been depressed. In the preferred embodiment, the user upon approaching the sink, could, by viewing indicator lights, readily discern whether a hot, cold or warm temperature setting has been selected.

Abstract: Apparatus is provided for controlling the pressure of gas in a plurality of dunnage bags. The apparatus employs an enclosure which houses a pressure regulator valve, linear air reset controller, pressure gauge, pneumatically activated electrical switch, and three-position valve for permitting quick filling of the dunnage bags from a high pressure inlet line. A low pressure line emerges from the enclosure and communicates with the bags. When the bags are at proper inflation, the electrical switch causes a green light to be illuminated. When the bags are inadequately inflated, the electrical switch causes a red light to be illuminated.

Abstract: A valve is disclosed which includes a first magnetic sensing means (71) and a closely positioned second magnetic sensing means (73). A valve shaft carries magnetic material (91) which is moved as the valve is opened or closed. The first magnetic sensing means (71) is magnetically held in one of its states when the valve is open, by the presence of the magnetic material (91). When the valve is closed the magnetic material (91) influences the second magnetic sensing means (73) and trips it into an alarm condition. The first magnetic sensing means (71) also trips into an alarm condition when the valve is closed. Thus, there is back-up sensing of the valve being closed. The second magnetic sensing means (73) also acts to provide an alarm if a person should maliciously attempt to fool the sensors by placing magnetic material near the first magnetic sensing means (71) to subsequently close the valve, without causing an alarm.

Abstract: The present invention provides apparatus for visually indicating the failure of a rupture disc comprised of an elongated hollow body member, a piston disposed in the body member which is moved therein by pressurized fluid pressure exerted thereon, and an elongated indicator pin which is pushed by the piston through an opening in the body when pressurized fluid causes the piston to be moved therein. The body member includes a pressurized fluid exhaust port which is opened by the movement of the piston. Pressurized fluid exhausted through the exhaust port can be vented to prevent abnormal rupture disk operation or it can be utilized to activate an alarm.

Abstract: This invention relates to an air trap for shutting off flexible plastic tubing, particularly infusion tubing, for instance, during a transfusion of blood the air trap will reliably shut off the supply of blood when air bubbles are contained in the liquid entering the infusion tubing. This is ensured in that the air trap for shutting off flexible plastic tubing, particularly infusion tubing, comprises a flat head (mushroom-shaped head), which on one side bears on a ciaphragm, which defines a pressure chamber, and on the other side is provided with a guide stem, which is provided with means for squeezing a flexible plastic tubing in a receptacle and is operable to release the tubing in the receptacle under the action of a gas pressure in the pressure chamber and is spring-biased to cause said squeezing means to squeeze the flexible tubing in the receptacle when the pressure chamber is pressure-relieved.

Abstract: The apparatus of the present invention relates to a first out indicator valve having a main body portion, with a flow bore longitudinally through the body; an inlet port, an exhaust port through the walls of the body and fluid communication with the longitudinal flow bore; a pilot port of the lower portion of the valve in fluid communication with the longitudinal bore, and a stem movable within the longitudinal bore from a first position blocking fluid communication between the inlet and exhaust port and a second position allowing communication between the inlet and exhaust ports.

Abstract: A device for transmitting simultaneously to two parallel rods a motion with a single degree of freedom as a longitudinal translational motion from a sleeve surrounding the rods and which is itself subject to first and second degrees of freedom, a translational and a rotary motion, which includes a plate interconnecting the ends of the parallel rods, the plate lying perpendicularly to the axis of translational motion of the rods, and a connecting mechanism between the plate and the sleeve such that the connecting mechanism is adapted for transmitting only the translational motion to the plate.

Abstract: An apparatus and method for isolating certain rotating components within the operator and valve systems and artificially loading those rotating shafts to create and measure torque developed within the valve operator system; and for using the torque measurements to correlate and analyze torque in relation to other valve systems parameters.

Abstract: A valve system comprising a housing, a main inlet to the housing for pressurized fluid communicating with an outlet from the housing, an auxiliary inlet to the housing for pressurized fluid communicating with the outlet, valve means in the housing movable to open or close communication between the main inlet and the outlet and between the auxiliary inlet and the outlet, and means exposed to the exterior of the housing and actuated by the valve means for indicating the position of the valve means relative to the main inlet and the auxiliary inlet.

Abstract: To provide a filter bypass and indicator, in a pump having an inlet and an outlet with a filter therein, a bypass port is in communication with the outlet upstream of the filter. A bypass valve assembly is provided in the bypass port and is normally in a closed position to direct all flow from the pump inlet through the filter. The bypass valve assembly opens in response to a preselected pressure differential across the filter to divert at least a portion of flow from the inlet around the filter. In addition, the bypass valve assembly includes a switch actuator and the pump includes a switch positioned in proximity to the bypass valve assembly so as to be operable in response to movement of the switch actuator.

Abstract: A unique apparatus and method are used to detect and measure movement of a valve spring pack and worm through monitoring rotation of the torque switch control post. A device for measuring the operating characteristics of a valve and its operator and the corresponding imposed valve stem load is attached to the valve operator. The apparatus provides devices for statically calibrating the operator relative to the imposed valve load and provides a device for recording traces of the imposed load and associated parameters during dynamic conditions as related to the operation of the operator and valve combined. The apparatus is then used to provide diagnostic dynamic traces at any specified time in the future for the operator and valve. These future traces are used to compare with earlier traces to verify correct performance and most importantly to detect induced or impending damage, malfunctions, or maintenance requirements for the operator and valve.

Abstract: The improvement of a mixing valve for plumbing in which three ceramic valve discs with appropriate control ducts are positioned parallel to one another in reciprocally watertight manner, in a housing with one hot water and one cold water inlet and one outlet, the disc on the inlet side being a stationary bearing disc, while the second disc rests against this first disc and can be turned from outside in order to control the quantity of flow, and the third disc can be slid linearly against the second disc for temperature adjustment by means of a manually adjustable thermostat that operates laterally to the disc axis, said improvement to be achieved in such manner that flow regulation can be simplified, a motor regulator capable of rotating engages with the second disc, the shaft of which said regulator fits into the stationary disc in a rotating manner and is immovably connected with the second disc, and the regulator can be adjusted by means of an electronic and individually adjustable flow regulator.

Abstract: An improved water supply valve for a fire installation where water is to be supplied through the valve in the event of fire. The valve includes a sensor external of the valve chamber which can magnetically sense the gate of the valve being closed and being useable to provide an alarm activating output signal. The sensor is connectable to a fire installation to give an alarm indication in response to the output signal when the gate is closed.

Abstract: A control device for determining what one, in a system of monitored functions, first became inoperative.

Abstract: A system for monitoring flow of lubricant in a line in a lubrication system wherein, in normal operation, lubricant is intermittently delivered through the line, the system comprising a thermistor in the line adopted to be cooled by lubricant flowing in the line, a timer for intermittently timing out periods during each of which a delivery of lubricant should occur, and a monitoring circuit which includes a fault signal actuated at the termination of any period in which a normal flow of lubricant has not occurred and the thermistor accordingly has not been cooled.

Abstract: Control valves for a plurality of outlets supplied from a single fluid source are combined in a single manifold. Each outlet conduit is selectively connected to an inlet conduit by an independently actuatable source valve. Each outlet conduit is also provided with an independently actuatable discharge valve and a safety relief valve. A pressure gauge may also be connected to each of the outlet conduits. The conduits may be channels formed in a solid manifold, and the independently actuatable valves may be manually actuatable push button valves. A locking mechanism is provided for each of the push button valves.

Abstract: A means of measuring the operating characteristics of a valve and its operator (16) and the corresponding imposed valve stem load is attached to the valve operator. The device provides a means of statically calibrating the operator relative to the imposed valve load and provides the means for recording traces of the imposed load and associated parameters and during dynamic conditions as related to the operation of the operator and valve combined. The device provides initial dynamic traces after initial assembly, maintenance and/or periodic testing of the operator and valve. The device is then used to provide diagnostic dynamic traces at any specified time in the future for the operator and valve. These future traces are used to compare with earlier traces to verify correct performance and most importantly to detect induced or impending damage, malfunctions, or maintenance requirements for the operator and valve.

Abstract: The supervisory switch assembly includes an inverted dish-like housing which is mounted directly on the body of a quarter-turn valve, such as a butterfly valve, and encloses the outer end portion of a rotatable valve stem carrying a valve member. One or more switches mounted on inside the housing trigger a warning signal upon being moved from one position to the other. A cam secured on the outer end of the valve stem is arranged to selectively engage each switch actuator, in response to rotational movement of the valve stem, and cause movement of each switch to trigger a warning signal in the event of an unauthorized movement of the valve from the fully open position or the fully closed position. The cam is also arranged to cause the switches to move to a triggering position in the event someone tampering with the switch housing moves the housing relative to the valve body, for example, attempts to lift the switch housing away from the valve housing.

Abstract: The invention relates to a gate valve (10) having both visual and electrical position indicating means for signalling when the valve is in the fully open and fully closed conditions. A position indicator housing (50) on the valve body (11) receives and accommodates therein a longitudinal valve stem extension (33) of the gate element (15) as the gate element moves between the open and closed positions. The indicator housing (50) is filled with transparent oil and sealed off from fluid communication with the valve chamber (12) and a diaphragm (135) in the wall of the indicator housing accommodates movement of the gate extension (33) inwardly and outwardly of the indicator housing (50) and is exposed to the fluid environments internal and external of said housing to avoid pressure differentials across the housing wall.

Abstract: A system for injecting foam insulation into a wall cavity or the like that includes a flow control section having a detecting means for automatically inhibiting the control section when the gun is placed in an inoperative or off condition.

Abstract: A valve device adapted to be fitted to an exhaust opening, said device comprising an apertured housing accomodating a slidable valve body. On exhaust pressure exerting sufficient force against said valve body, the exhaust fluid may exit through said apertures and concurrently cause emission of a signal, indicating exhaust.

Abstract: An anesthesia apparatus which comprises at least two flow meters, an oxygen gas supply means for supplying oxygen gas to one of said flow meters, a nitrous oxide gas supply means for supplying nitrous oxide gas to another one of said flow meters, at least two flow rate adjustment valves disposed between the one of said flow meters and said oxygen gas supply means and between said another one of said flow meters and said nitrous oxide gas supply means, respectively, each of said flow rate adjustment valve including a valve element having a predetermined shape to vary the rate of flow of each of said gases substantially in proportion to the amount of movement of said valve element, a flow control means connected to said flow rate adjustment valves for actuating said valves, and a flow rate adjustment means operatively connected to said flow control means and operative to set a selected angular position of said flow control means with respect to said flow rate adjustment valves for thereby determining the relati

Abstract: A module which integrates into a single block a process gas flow control system for precisely metering the flow of gas fed into a furnace diffusion tube or other utilization device. The block is formed of a chemically-inert body having cavities therein for nesting a gas filter, a pressure-regulator, a flowmeter, a pressure indicator and the other components of the system necessary to set the flow rate and pressure of the gas. These components are intercoupled by internal bores in the block which define flow passages that communicate with the cavities.

Abstract: A delay circuit includes a switching element for operatively switching between a first position and a second position. The switching element connects an input voltage to an electrically-operated device in the first position. A delay element is operatively connected to the switching element for maintaining the switching element in the first position when an input voltage interruption occurs which is less than a pre-determined time interval.

Abstract: A selectively changeable pneumatic control system for monitoring the start-up and running of process machinery, the system having a pneumatically operated indicator, a pneumatically operated arrangement for operating the indicator and a selector for setting the pneumatically operated arrangement to any one of a first, second, third, fourth or fifth monitoring condition thereof which monitors a respective variable of the process machinery and will operate the indicator to indicate an unsafe condition thereof, the first condition being adapted to monitor a variable of the process machinery that is normally safe when the process machinery is not running, the second condition being adapted to monitor a variable of the process machinery that is normally unsafe when the process machinery is not running but must be locked out to allow start-up and must become safe within a predetermined time period after initial start-up, the third condition being adapted to monitor a variable of the process machinery that is normal

Abstract: A main fluid pipe within a box-like housing has four auxiliary pipes connected thereto. Each auxiliary pipe extends to the outside of the housing. The first auxiliary pipe is connected to the drain of a swimming pool; the second is connected to the swimming pool pump; the third is connected to the skimmer and the fourth which extends upwardly is normally unconnected but closed by a valve. An adapter allows a standard garden hose to be connected to the fourth pipe for priming the pump and the swimming pool skimmer and drain lines. Chemicals may also be introduced into the fluid system through the fourth pipe. A thermometer, visible from the outside of the housing measures the temperature of the water within the pipe connected to the pump. The thermometer also measures the outside air temperature for comparison with the water temperature.

Abstract: Device for controlling of the opening and closing of a valve, including an automatic lockout requiring a manual reset, and further having an indicator for indicating the position of said valve.

Abstract: A pneumatic logic control module is disclosed which includes three miniaturized, piloted, detented relay valves mounted on a pneumatic circuit board including a valve mounting plate, a circuit plate having routed flow paths formed in each face, and a connector plate having barbed ports for receiving flexible tubes. The pneumatic circuit interconnects the relay valves so that the relay valves are shifted from a normal position to an active position and locks to the normal position in a predetermined sequence to produce a series of pneumatic pressure signals. The module produces a first pneumatic pressure signal in response to a start signal which is used to initiate a first event. A return verification signal indicating that the first event has been completed terminates the first pressure signal, and initiates a second pressure signal which starts a second event.