Abstract: A packaging device in which articles enclosed in shrinkable wrapping are conveyed through a shrink tunnel. At the exit end of the tunnel roller pairs are moveably supported for lateral movement into engagement with the sides of the articles. Each roller pair comprises a driver roller nearest the tunnel and a nondriver roller remote from the tunnel. The rollers of each pair are floatingly supported so both engage the respective side of an article. Photoelectric sensing means is provided to be actuated by the articles emerging from the tunnel and controlling the movement of the roller pairs toward and away from the sides of the articles.

Abstract: A packaging machine in which the shipper package is formed from a carton blank which is wrapped around the article to be shipped. The packaging machine includes a loading station having a loading mechanism for loading an article into each compartment as the compartments move continuously through the loading station. The loading mechanism includes a loading platform disposed above the path of travel of the article receiving compartments and wiper blades mounted for movement along the loading platform in the direction of travel of the compartments to remove an article deposited on the loading platform and to deposit it in a compartment as the compartment moves out from under the loading platform. A wrapping station is provided wherein the article receiving compartments are moved longitudinally through the wrapping station on a conveyor and are moved laterally of the conveyor so as to project over an edge of the conveyor when passing through the wrapping station.

Abstract: The following disclosure sets forth a non-marking lawn mower in which a cutter cylinder carrying multiple disc blower cutters in a centrifugal blower structure is supported in parallel spaced relation to a rearward roller structure which carries the mower. The drive motor rotates the cylinder at a cutter speed greater than 6,000 feet per minute. At least one forward adjusting roller can be positioned to determine the height of cut effected by the cutter cylinder.

Abstract: An agricultural tool bar particularly well suited for use as a hay rake or the like is disclosed which may be quickly and easily moved between transport and working positions with a minimum of effort. The tool bar comprises a wheeled frame which is secured to the draw bar of the tractor and which has wheeled wing frames pivotally secured to the outer ends thereof. Each of the frames carries a pivotal tool support or bar thereon which are interconnected and which may be pivotally moved to raise and lower the tool secured thereto. Each of the wing frames carries a selectively pivotal wheel which may be locked in working or transport positions. Locking means is provided between the outer ends of the central frame and the wing frames to lock the wing frames in their working position.

Abstract: In a preferred embodiment there is provided combine tooth having a tooth shaft and at the base of the shaft having a unitary continuous flange extending transversely to the longitudinal axis of the shaft, with a distal portion of the shaft extending substantially angularly laterally from an intermediate bend point, and there is additionally provided for combination with the tooth a combine belt-mountable base strip for mounting on top of the combine belt fixedly, the base strip having at each of opposite ends thereof a through aperture, one aperture at each of opposite ends, the holes each of hole diameter receivable of the tooth shaft and the structure of the base strip defining continuous with each hole a narrowed slot extending rearwardly having a slot width slightly less than the diameter of the tooth shaft through which slot the tooth shaft is pressable into the hole continuous therewith, and the underface of the base strip including spaced-apart ridges, there being a separate set of the spaced-apart rid

Abstract: A first yarn is combined with a second yarn from one or more yarn packages thereof by a device which includes a yarn holder adapted to hold first yarn wound thereon, the yarn holder having an axial passage through which the secone yarn travels, a guide at the exit end of the holder for guiding the first yarn into engagement with the second yarn as the first yarn unwinds from the holder, and a support for the holder. The support together with the yarn holder pivots about the guide so that the holder is automatically aligned with the second yarn even though the second yarn varies in its angle of delivery to the holder. The second yarn thus carries the first yarn as the first yarn is wound about the second yarn.

Abstract: A doffing apparatus for a spinning frame having bobbin spindles arranged at equal pitch, comprising a movable frame carrying bobbin-chucking means and bobbin-deflecting means, and bobbin-conveying means, said apparatus being operative so that full bobbins from the spinning frame are transferred onto the bobbin-conveying means by said bobbin-chucking means in exchange with the empty bobbins brought by this bobbin-conveying means, without causing any interference, due to the action of the bobbin-deflecting means, between the full bobbins passing from the spinning frame onto the bobbin-conveying means and the empty bobbins being supplied from the conveying means to the spinning frame, thus minimizing the number of steps of doffing operation and the number of parts of the doffing apparatus as a whole.

Abstract: A selective switching mechanism for an electronic watch having a four digit electro-optic display, the mechanism having three operative positions. In the first switching position, the display is that of hours and minutes and requires for its full scale all four digits. In the second position, the display is that of seconds and requires for its full scale two of the four digits, and in the third position the display is calendar date and requires for its full scale two of the four digits. The switching mechanism is operated by a crown and stem assembly which occupies the first position when depressed part way, and which occupies the second position when fully depressed. The third position is occupied by pulling out the crown. Thus all three switching positions are attained by operation of a single actuating element.

Abstract: An electronic watch having an illuminating time display is provided with a switch for controlling the illumination which is operable controlled movement of the arm on which the watch is carried. A closed casing in the watch is provided with electrical contacts and a ball which will engage the contacts to close the watch upon predetermined movement of the arm.

Abstract: An invertible timer comprises a closed transparent vessel having upper and lower chambers with a throttle therebetween, said vessel being filled with a transparent liquid in which there is a quantity of granular material, so that such material is protected from being electrostatically charged and its rate of fall is somewhat lessened. As the material fall in the liquid, a comparatively long time indication is obtained, with a small amount of material. A turn wheel in each chamber is turned by the material to show at a distance the states of time counting and termination of such counting.

Abstract: A fuel control system for a gas turbine engine includes a variable metering device from whose downstream side a pair of passages lead respectively to pilot and main engine burners. A throttle valve controls flow to the main burners and is urged open by the pressure downstream of the metering device. A biasing spring urges the throttle valve shut and the bias applied by the spring is variable in accordance with engine speed or during starting of the engine. Variation in spring bias is applied through alteration in the position of a spill valve connected across the metering device.

Abstract: This invention cures the problem attendant the ingestion of oil in the engine of a fan-turbine engine combustion propulsor should oil leak from the fan blade seal by capturing and judiciously venting the leakage.

Abstract: A manifold for an internal combustion engine to serve also as an exhaust gas depollution reactor. An ante-chamber into which the gas initially flows, can be made to operate as a post-combustion chamber by introduction of excess combustion air while the engine is operating under the usual richer fuel/air mixture on start-up. The catalytic reaction components are located in a downstream main chamber with which the ante-chamber shares a common partition wall for heat transfer purposes.

Abstract: A hydraulic control system includes a generating circuit for providing power to a work function. A driving apparatus operates the generating circuit. A control circuit is connected to the generating circuit and the driving apparatus for permitting delivery of power to the work function when the driving apparatus is operating up to a predetermined speed. The control circuit also stops delivery of power to the work function when the driving apparatus runs above the predetermined speed. The control circuit further includes a cut-off apparatus for stopping delivery of power to the work function when the driving apparatus is running up to the predetermined speed.

Abstract: A hydraulic control system includes a generating circuit for providing power to a work function. A driving apparatus operates the generating circuit. A control circuit is connected to the generating circuit and the driving apparatus for permitting delivery of power to the work function when the driving apparatus is operating up to a predetermined speed. The control circuit also stops delivery of power to the work function when the driving apparatus runs above the predetermined speed.

Abstract: An engine including a combustion chamber having connected thereto a combustion-air inlet duct in which a first restriction is incorporated, and a flue-gas return duct incorporating a second restriction connected to a part of the combustion air duct which is situated between the combustion chamber and the first restriction.

Abstract: A vehicle brake booster and master cylinder assembly has a vacuum suspended booster section which is controlled by movement of the vehicle brake pedal. A hydraulic booster section is in series with the vacuum suspended booster section, and a master cylinder unit is in series with the hydraulic booster section. The assembly is so arranged that in normal operation the vehicle operator obtains booster brake actuating pressures by operation of the vacuum suspended booster which acts through the hydraulic booster mechanism without operating the hydraulic booster. When greater brake actuating pressures are required, as indicated by increased brake pedal force exerted by the operator, the vacuum booster reaches its limit or run-out condition and the hydraulic booster is operated so as to continue the increase in master cylinder output pressure.

Abstract: A reheater arrangement for providing steam within a predetermined temperature and pressure range for turbine rotor gland seal devices. Steam taken from a steam source is divided by suitable control means into a first and a second portion. The first portion of steam is directed into the tubes of a shell and tube reheater element while the second portion is throttled to an appropriate pressure usable in the glands. The throttled second portion of the steam is then passed through the shell of the reheater element where heat from the first portion from the source of steam is exchanged with the second throttled portion of the steam to provide steam at the appropriate temperature and pressure for use in the gland seals.

Abstract: A flap gate including a water gate door body of closed shell structure having a substantially rectangular vertical transverse cross-section with its bottom edge in the lengthwise direction being detachably supported on pivotal supports in such manner that said water gate door body can be freely erected and laid, is characterized in that the width a of said vertical transverse cross-section is selected one-sixteenths or less times as small as the distance b between said pivotal supports, and that when said water gate door body is vertically erected, a contact surface along the bottom edge of said door is brought in contact with a bank wall and also restrained by said pivotal supports so as not to separate from said bank wall.

Abstract: A plow assembly for cutting a slit in the ground and simultaneously laying a cable in the slit as the propelling vehicle moves over the ground. The plow assembly has a shaker case containing a pair of counter-rotating eccentric weights for providing a vibratory action to the plow, additional weight means are located rearwardly of the plow and plow frame so as to reduce the amplitude of vibration at the rear end of the assembly, and the assembly also has elastomeric isolation mounts for the shaker case on the plow frame so that the resulting action of all the components is such that the plow blade pivots about a pivot point located rearwardly of the assembly and in a particularly efficient arcuate cutting movement.

Abstract: A tool for maintaining and servicing a pressurized refrigeration system or the like wherein it is desirable to remove and replace a threaded check valve core without depressurizing the system. The tool includes a body member having a longitudinal passageway extending therethrough with means to provide sealing communication between one end of the passageway with the fitting in which the check valve is fitted. A removable cap sealingly engages the opposite end of the longitudinal passageway with an operating shaft extending therethrough for axial and rotary movement within the passageway. An annular sliding seal is disposed between the shaft and the removable cap. The shaft includes engaging means formed on one end thereof for releasably engaging the valve core to unthread and remove it from the fitting and withdraw it into the passageway to a position adjacent to the removable cap.

Abstract: A household refrigerator-freezer has an air passageway formed through the partition between the freezer and the fresh food compartment. Air is controllably passed by convection through the passageway for maintaining the fresh food compartment in a preselected temperature range. Apparatus is associated with the passageway for controllably opening and closing the air passageway.

Abstract: A series of air-cooled, vertical condensing tubes extend upwardly from a horizontal header to which refrigerant vapor is supplied. The vapor flows upwardly from the header through the condensing tubes and forms, on the tubes' internal surfaces, condensate which then flows downwardly into the header and eventually through the header's outlet. With this arrangement, the customary top header is not needed.

Abstract: In a shaft coupling having a flexible coupling member between the two coupling halves the coupling member comprises a plurality of circular members each having a pair of projections on each side extending axially and being offset with respect to one another for power transmission between the coupling halves.

Abstract: A constant velocity or homo-kinetic universal joint transferring torque through at least three ball members between inner and outer coupling members and held by a cage in a common plane bisecting the angle between the axes of thecoupling members. The radial dimension of the joint is kept at a minimum and the cage rides on spherical walls of the inner and outer coupling members and has circumferentially spaced, radial lugs increasing the guide surfaces of the cage windows. The cage is positioned normal to the open face of the outer coupling member, pushed into the coupling member, rotated circumferentially to align the lugs to fit into the grooves of the coupling member, and then rotated axially into the plane of the coupling member to hold the coupling members in fixed axial relation.

Abstract: A method for manufacturing stockings, socks and the like and closing the toe thereof on a double cylinder knitting machine, comprising the steps of manufacturing a leg, heel and foot portion by selecting the needles to knit in both needle cylinders in a manner to make the reverse fabric side on the exterior as discharged from the machine, operating a 1:1 selection of the needles, lowering a first group of selected needles in the lower needle cylinder and inactivating these needles in the lower cylinder, knitting the toe with the needles which have been transferred to the upper needle cylinder thereby providing an additional pocket around which non knitted thread is wound and interknitting the final part of the additional pocket with the initial part thereof and with the foot portion of the stocking.

Abstract: In combination with a washing machine of the type including a cylindrical drum mounted for rotation about the axis thereof and having a washing fluid inlet and a washing fluid outlet, a recirculating pump having an inlet and an outlet, a recirculating suction line extending from the washing machine outlet to the pump inlet, and a supply tank having an outlet, and a main inlet line extending from the pump outlet to the washing machine inlet, the supply tank outlet being connected to the suction line such that flow to the pump inlet from the washing machine will cause chemicals from the supply tank to be drawn into the pump and be mixed with flow from the pump to the main inlet line.

Abstract: The rotatable plug of a cylinder lock has an axially extending outwardly open cavity paralleling a key slot and normally registering with an axially extending groove in the inner wall surface of the surrounding cylinder, the groove and the cavity being bridged by a locking bar with sloping flanks cammable radially inwardly, against the force of compression springs within the recess, upon rotation of the plug relative to the cylinder. Seated in the cavity are a plurality of axially spaced tumblers which are freely rotatable about pins transverse to the cylinder axis and have recesses alignable, in a predetermined operating position, with respective projections on the locking bar to enable the inward camming of the latter; each tumbler carries a pair of permanent magnets confronting a thin partition between the cavity and the key slot.

Abstract: A tubing bending machine is disclosed comprising a die and cooperating shoe means, means for advancing the die toward the shoe means to bend a pipe positioned therebetween, and a hydraulic piston and cylinder assembly coupled with the shoe means for restricting the movement of the shoe means during bending of the tubing, and for returning the shoe means to a pre-bending position. A linear scale is connected to a piston rod of the piston and cylinder assembly and movable therewith relative to the cylinder of the piston and cylinder assembly. A depth of bend indicator means is adjustably positionable along the linear scale to indicate a selected desired depth of bend reading thereon. Switch means is mounted on the machine in the path of movement of said depth of bend indicator means to be contacted by said depth of bend indicator means as it moves with said linear scale and piston rod of said piston and cylinder assembly during the bending of a tube.

Abstract: A roller guide for guiding rod or wire stock between a pair of rolls which shape the stock. The roller guide includes a pair of guide rollers which are adapted to engage the opposite surface portions of the stock and are mounted for rotation on a guide housing for rotation about substantially parallel axes. The guide housing is mounted upon a base. Fine adjustment means is included for effecting a fine adjustment of the position of the guide housing relative to the base in order to effect fine adjustment of the guide rollers. The fine adjustment means includes a member which is fixedly supported by the guide housing, a movable adjustment member and resilient means interposed between the member fixed on the guide housing and the movable adjustment member, which yields to enable movement of the guide housing and of both of the rollers to occur in response to forces applied to the rollers.

Abstract: This invention relates to a wire processing machine comprising a die through which wire is drawn along a rectilinear path and a turning head downstream of the die at which the die-drawn wire is surface turned. The turning head is rotatably mounted in bearings which are oil-mist lubricated.

Abstract: Apparatus for stripping hollow articles off of a press ram including a stripper supporting ring extending circumferentially around the press ram, a plurality of segments mounted on said supporting ring for limited radial displacement with respect to the press ram axis, and a plurality of individual hydraulically cushioned strippers mounted in each of said segments for direct engagement with the article to be stripped from the press ram. Various preferred embodiments include various mechanisms for permitting and/or positively providing radial displacement of the segments so as to accommodate passage of the press ram and article to be stripped. Several of these preferred embodiments include biasing means such as springs and/or pressure medium forces for biasing the segments radially inwardly and chamfered conical beveled edges on the segments for accommodating an outward biasing force application by way of the article and press ram.

Abstract: A horizontal support frame having an upstanding lever pivoted to the frame adjacent one end thereof with the toggle comprising a pair of arms having adjacent ends pivoted together, the opposite end of one of the arms being pivotly connected adjacent the end of the frame opposite the upstanding lever. The opposite end of the other arm is pivotly connected to the upstanding lever intermediate the ends thereof. A hydraulic actuator for the upstanding lever comprises a cylinder having one end closed and the opposite end open, the closed end being pivotly connected to the pivotly connected ends of the toggle arms. A piston is reciprocally mounted in the cylinder and has a piston rod extending outwardly of the open end of the cylinder, the free end of the piston rod being pivotly connected to the frame on the same pivot pin pivotly connecting the lower end of the lever to the frame.

Abstract: An improved apparatus is provided for measuring the viscosity of a liquid comprising a rotatable container means; means for rotating said container means at a desired speed; a freely rotatable member within said container means, said container means and said member defining a volume therebetween for receiving liquid to be measured; a third bath surrounding said container means for maintaining said container means at a desired constant temperature; means for measuring torque of said member when said volume is charged with liquid to be measured and said container means is rotated by said rotating means; and a bearing made from a material having a high thermal conductivity and located between and contacting said container means and said fluid bath to facilitate relative rotation therebetween.

Abstract: An autoclave body is formed with a pressure chamber which has a closable ning; to permit rapid replacement of a rupturing membrane, the body is formed with a slot, channel, or notch, in which a strip of membrane material can be inserted, to be secured against the opening of the chamber by a quick-release movable pressure head, so that, upon rupturing of the membrane facing the pressure head, a new element of membrane material can be quickly placed over the opening of the chamber. The movable pressure head is hollow, with a cylinder opening facing the pressure head opposite the membrane side which closes the opening, and a piston is located in the hollow of the pressure head, to permit application of a vacuum to the side of the membrane not facing the opening of the pressure fluid chamber.

Abstract: A cigarette testing device comprises a conveyor drum which is arranged to carry cigarettes sideways through a testing station, and which includes a pair of axially spaced sets of sprocket teeth, the cigarettes being carried in the recesses between the teeth; a suction or pressure chamber which is mounted adjacent to the conveyor drum and is arranged to communicate with spaces formed between the two sets of sprocket teeth, so that at least part of each cigarette is surrounded by predetermined suction or pressure during testing; a second pair of rotating axially spaced sets of sprocket teeth which overlap with the first pair of sprocket teeth so that the cooperating sprocket teeth together form two axially spaced seals around each cigarette restricting communication between the chamber and atmosphere; and a device for sending the air flow through the wrapper of each cigarette produced by the suction or pressure in the chamber.

Abstract: A coaxial cylinder rheometer having a very small (less than 0.020 inches [0.0508 cm]) gap between the concentric cylinders and being capable of charging highly viscous (greater than 100,000 poise) and/or thermally sensitive materials, e.g., Polyvinyl Chloride, Polyurethane, etc., into this gap for testing. The inner cylinder, rotor, comprises a single element which can be driven axially and rotationally. The outer cylinder, stator, comprises an upper part having a projection-like ring on its lower surface and a lower part having a trough-like ring in its upper surface. The two parts are fastened together with mating screw threads on each part.

Abstract: The invention is directed to a method and gauge for nondestructively testing and certifying the workable qualities of a casting. The guage comprises a tab cast at the same time as the remaining portion of the casting located in a nonfunctional location, when considered in the light of the later use to be made of the casting, and also in such a position that it can be bent as by striking with a percussive instrument or by the application of a continuous bending force without damage to the remaining portion of the casting. The tab or guage will be subjected to a strain greater than the maximum strain to which the remaining portion of the casting will be subjected, during its installation or use, and determining by visual inspection whether or not the tab, at its bend has cracked, the overall ductility of the casting can be judged and it can be projected, that the casting will be able to withstand the forces to which it will be subjected when employed in a desired manner.

Abstract: An improvement in inspection penetrant processes for the detection of surface defects in test bodies, wherein a water-washable penetrant of the balanced surfactant/synergist type or of the slow-solubility type is inhibited with respect to its solubility in wash water to the point of substantial insolubility except in the presence of mechanical agitation or application of a vigorous spray of wash water, thereby enhancing the flaw entrapment efficiency of penetrant indications. The inhibition or depression of solubility is achieved by any one or a combination of several techniques; (1) raising the temperature of the wash water to above a critical point of solubility inversion, (2) dissolving a solubility-inhibiting solute in the wash water or in the penetrant, and (3) allowing a solubility-producing constituent to evaporate from the penetrant.

Abstract: Apparatus for monitoring and regulating carburetors and other gasoline consumption devices comprises a first conduit, means for feeding test liquid under pressure to the first conduit, a flowmeter, an auxiliary reservoir, a first valve in the first conduit for selectively directing the flow of liquid either directly from the source of liquid to the flowmeter or from the auxiliary reservoir to the flowmeter, and a float valve and a check valve for arresting the flow of liquid to the auxiliary reservoir when the auxiliary reservoir is full. A second conduit is provided, for air under pressure, with a pressure regulator in the second conduit, a second valve in the second conduit coupled to the first valve and so arranged that the second valve is open when the first valve is in the position in which the flow meter is fed from the auxiliary reservoir and is closed when the first valve is in a position that the flowmeter is fed directly from the source of fluid under pressure.

Abstract: A dynamometer in which a signal generator provides a repetitive signal of adjustable frequency, to record-playback heads fixed adjacent to similar magnetic recording mediums that are non-magnetically mounted and spaced axially apart on a drive shaft rotating without loads. Simultaneous recordings are made by the heads on the mediums and the signal generator switched off. With the rotating shaft loaded, the recordings are played back by the axially spaced recording-playback heads, and a phase difference between the recorded signal from each head is a measure of torque on the shaft. The frequency of recorded signal from either head is a measure of the speed of rotation of the shaft. The playback signals drive an electronic computer of well know design that multiplies the measure of torque by the measure of speed of rotation to provide a voltage proportional to shaft horsepower to a voltmeter that may be calibrated to read directly in horsepower given the elastic modulus of shaft material and shaft dimensions.

Abstract: A mechanical pipette having a fixed stroke for aspirating and discharging a predetermined volume of liquid into and from a reservoir. A measuring piston controls the volume of liquid drawn into the reservoir and a substantially larger piston assures that all of the liquid in the reservoir is expelled therefrom on a discharge stroke. On the discharge stroke, a mechanically actuated valve is opened to admit air being compressed by the substantially larger piston into the reservoir.

Abstract: Facing each other diagonally across a pipe for flowing fluid is a pair of like, transmitter-receiver units operating with signals of supersonic frequency. The units are in a joint circuit and periodically are simultaneously energized to transmit identical signals to each other in opposite directions in high frequency bursts, each burst being of a chosen number of cycles and being shorter than the transmission time between the units. The bursts, received between successive transmissions, are phase shifted with respect to each other, resulting from one burst being speeded up and the other burst being slowed down in accordance with the velocity of the liquid traversed. The received bursts, in sine wave form, are heterodyned with a cosine wave form modulating signal to produce a sine wave resulting signal dependent upon phase difference between the bursts and at a low frequency.

Abstract: A meter supporting and positioning apparatus for use with a public utility meter to facilitate its use and connection into a supply line. The apparatus includes inlet and outlet pipe members with one connecting the meter to a service line and the other pipe member connects with a supply line. the pipe members each have a generally horizontally disposed foot forming portion extending partially under the meter and being adapted for engagement with a support surface. Each of the pipe members also include an upstanding leg forming portion having the meter connected to a free end thereof whereby the meter is spaced above the support surface. A connector engages the two upstanding pipe portions holding same in spaced relation and forms a unitary and rigid support structure. The meter is positioned relative to the feet forming portions so as to have balanced loading to reduce torque applied to the pipe members. A form of the apparatus includes a pipe member for connecting a pressure regulator in series with a meter.

Abstract: A method and apparatus for measuring fluid flow by optically detecting the deflection of a tube extended transversely across a vessel normal to the direction of flow. A light source directs a beam of light axially into one end of the tube and the intensity of the beam is measured at the other end. Fluid flowing in the vessel tends to deflect the tube in the direction of flow thereby intercepting a portion of the beam and decreasing the intensity of light at the other end as a function of the rate of flow through the vessel.

Abstract: A liquid level detecting device for vapour generators is characterized by a stack tube for connection to the vapour generator and preferably two separate side tubes in the form of loops each having an upper vapour inlet to the stack tube and a lower outlet disposed respectively at a low water level and a high water level. In use the loops fill with cooled condensate. When the water level moves past either of the cooling tube outlets the condition of that tube is disturbed, and the cooled water is displaced from one portion of the loop to another and steam occupies the previously cooled portion of the tube. The temperature change is sensed and used to give an alarm.

Abstract: A liquid level gauge for monitoring the height of liquid in a storage tank or the like. The gauge comprises an upright conducting probe adapted to be immersed in the liquid in the tank, and an upright series of electrodes closely adjacent the probe. The latter is adapted to be excited from a source of a.c. voltage generated by an astable multivibrator. Each of the electrodes is connected to the input of an amplifier through a rectifier circuit. The amplifiers are of the digital comparator type and have output terminals respectively connected by means of summing resistors to an electrical indicator such as a milliammeter, which provides an indication of the number of amplifiers being driven to full output at any particular time. The arrangement is such that each of the electrodes constitutes one plate of a capacitor, the other plate being formed by the single upright conducting probe. When a particular electrode is above the level of fluid in the tank, the magnitude of the a.c.

Abstract: A capacitive probe for gauging the level of liquid within a reaction tank, or the like, in which the capacitive probe is formed by an electrode strip affixed to a pre-existing elongated member which projects into the reactor tank, wherein the tank and the strip define two electrodes of a capacitor.

Abstract: A storage tank liquid level sensor for indicating levels of two immiscible liquids in the tank wherein a first magnet is carried by a float on top of one liquid and a second magnet is carried by a float on top of the other liquid, the first magnet operating a switch to indicate when the one liquid reaches a predetermined level and the second magnet moving a coded tape with respect to a read head in accordance with changes in the level of the other liquid, a transmitter to transmit data from the read head, a receiver for such data, an arithmetic logic unit to convert the data to binary coded decimals, a memory unit for storage of BCD data, and a display unit for selectively addressing the computer and displaying selected data.

Abstract: The invention relates to a low-inertia hygrometer for controlling and measuring the hygrometric degree of a gaseous flux. The hygrometer includes two electrodes placed at a certain distance from one another and separated by a medium which, initially, is a poor conductor of electricity, but becomes electrically conductive when water vapour is present.