Abstract: A fail safe circuit is provided in a salinity monitor having a salinity indicating panel for visually presenting salinity levels and a salinity cell for sensing salinity levels. The salinity cell is electrically connected to the salinity indicating panel by a plurality of salinity cell leads which supply electrical signals to the salinity indicating panel for indication of salinity levels. The fail safe circuit enables an alarm when a salinity cell lead becomes disconnected from the salinity indicating panel. Also, a back-up circuit is provided for enabling an alarm should the fail safe circuit become inoperative.

Abstract: A mounting bracket for retaining a junction box adjacent to a wall under construction. The mounting bracket includes a laterally extending member having a cutout section removed therefrom. A flange is substantially orthogonally connected to one side of the laterally extending member. At least one ear is operatively connected to the laterally extending member and projects through the cutout section in the same direction as the flange. A slot extends along the ear and is in communication with an insert opening positioned in the laterally extending member adjacent to the cutout section. A junction box, for electrical cables, telephone cables, television cables, or the like, having a positioning screw may be readily inserted through the cutout section with the positioning screw engaging the slot to retain the junction box relative to the mounting bracket.

Abstract: A salinity indicatory system useful to monitor variations in the salt content of water sources provides for the simultaneous monitoring of a plurality of test stations and the operation of automatic alarm and dumping means when salinity concentrations reach or exceed predetermined set points. The alarm and dump set points are capable of being set at different levels to provide for an indication of an approaching dump condition. The system includes temperature compensating networks having thermistors and associated resistor networks mounted inside the salinity cell to function both as temperature shaping resistors and electronic scaling resistors, thereby providing the system with multi-range capability. A summary fault alarm circuit allows all alarm conditions occurring with respect to any of a plurality of perimeters to be signaled through a single, summary fault relay.

Abstract: A retaining clamp for use with a combination valve and conductivity cell assembly is formed from two identical clamp halves which, when closed upon the valve and conductivity cell assembly, tightly connects the valve nipple and operating safety nut of the assembly in fixed operating relationship to insure proper reciprocal movement of the valve sleeve.

Abstract: The speed of a vehicle, and particularly a ship, is controlled to minimize the sum of fixed and variable operating costs. The variable costs are incurred substantially only due to fuel usage. The rotational speed and torque parameters of the ship propeller shaft are measured and utilized to derive an expression for shaft horsepower in terms of these parameters. The variable cost function is derived from the horsepower function, fuel factor, unit volume fuel cost and voyage distance for various ship speeds. The fixed cost function is determined on the basis of voyage time for the various speeds, loading time and total annual costs for maintaining the ship per unit of time. The ship throttle is controlled to operate at the speed at which the total fixed and variable costs is minimized.

Abstract: A dental instrument for simultaneously taking an impression and a bite has a pair of parallel elongated bite tray holders which are laterally spaced apart and are connected together at one of their adjoining ends by a connector wire loop. A manipulating handle is fixed to one of the tray holders at the end opposite to its connected end and has an inner fixed leg portion which protrudes from the instrument at a close obtuse angle to pass the lip of a patient and has an integral free outer end portion that extends from the inner end at a sharp angle of at least 90.degree. for easier manipulation beyond the cheek of the patient by an operator. A bite tray is removably and slidably carried by and positioned between the tray holders.

Abstract: A handle attachment for power chain saws to extend the use of the basic chain saw structure for cutting underbrush, weeds and the like. The curved handle attachment is detachably pivotally fixed on the body of the power chain saw and positions the cutting bar in a horizontal position instead of the conventional vertical position when the chain saw is being operated in a normal manner to cut wood. The handle attachment is adjustable to accommodate users of different height and such adjustability includes a link bar pivotally connected at one end to the handle and pivotally connected at the other end to the conventional chain saw handle. The handle of the chain saw attachment is provided with an adjustable position hand grip and a throttle control assembly.

Abstract: A cell body having a pair of electrodes insulated from each other and adapted for direct immersion and use in commercial, laboratory, or industrial fluids or process streams, the cell being usable at temperatures below freezing and above the boiling point of water. The cell includes an insulated ultra pure antimony electrode and an insulated electrode of noble metal, the noble metal of the one electrode being immersed in the process stream as is the pure antimony electrode. The cell provides a self-contained solid state unit with the two electrodes adapted to measure pH in fluids or process streams containing solid mineral or ore particles, in acid, neutral or basic solutions of a wide range of temperatures and pressures, including vacuum applications and this system requires no external or internal reference or standard electrodes.

Abstract: A simplified clean conductivity or pH cell assembly comprising a solid plastic cell body and a test fluid conduit comprising a clean pipe fitting, affixed to the forward face of the solid body by means of an external clamp and a seal such as an O-ring. The clean pipe fitting is preferably formed of stainless steel and the internal surface thereof which comes in contact with the test fluid is plane and has no crevices or the like which could cause contamination of the fluid.Pencil shaped electrodes are fixed in said solid body and extend therefrom into the test fluid in the conduit to be measured. The face of the solid body which is in contact with the test fluid is plane with no cavities, crevices, holes, projections, restricted channels, or the like. The electrodes for conductivity or pH measurement are cleanly formed of glass or stainless steel or other suitable material and have no surfaces which might result in contamination or the collection therein of dirt and the like.

Abstract: A simplified system for practical use in the measurement of specific ion concentrations. A probe for introduction into a fluid stream to measure the ion concentration thereof and said probe comprising an ion sensitive electrode for immersion in a fluid stream in combination with an annular elongated electrode having a noble metal, such as one of the platinum group of metals, on an end surface thereof for immersion in the fluid stream. The combination of the ion sensitive electrode, and the annular elongated electrode having an end thereof with the noble metal is placed in the fluid stream to be measured and is electrically connected to a measurement and/or indicating instruments.

Abstract: A strain meter includes first and second blocks clamped to a rotating shaft with a linear variable differential transformer (LVDT) rigidly affixed to the first block and a displacement arm rigidly affixed to the second block. A LVDT core is attached to one end of the displacement arm and disposed to be movable without contact through the center of the LVDT. A flexible cable is connected between the displacement arm and the LVDT to control the radial position of the LVDT core. A vertical stabilizing bar is connected between the blocks and includes a cutout section adjacent the second block to allow for necessary flexibility for the second block to follow shaft motion. Information signals generated by the LVDT are telemetered off the shaft to a receiver.

Abstract: An auxiliary shovel operatively mounted on each side of an agricultural implement, each being laterally disposed relative to the usual rows of shovels. A ground marker laterally extending from each side of the implement and being automatically operable into down ground engaging and marking position and into raised inoperative position. Each auxiliary shovel being connected with the marker which extends laterally from the same side of the implement, and means automatically connecting each shovel to a marker, each shovel being in down operative ground engaging and digging position when its corresponding marker is in down ground marking position and being in inoperative raised position when its corresponding marker is in raised position. The positions of the two laterally extending markers being controlled by the operator of the implement.

Abstract: Method and apparatus for cooking in a microwave oven individual cuts of meat such as rib steaks and prime rib. The implement comprises a base of generally rectangular configuration which is formed of a thermoplastic sheet, such as plexiglass, and is provided adjacent each corner thereof with an upstanding post. The implement also includes a generally rectangular floating member formed of plexiglass having apertures adjacent each corner thereof which are adapted to slideably receive therein the aforementioned posts which are provided on the base of the implement. The individual cut of meat is disposed on the base of the implement and the floating member receives in the apertures thereof, the posts, and floats downwardly on the posts until it is in contact with and resting on the cut of beef to be cooked. The floating member, when in operative position resting upon the cut of beef, permits cooking of the cut of beef around the outer edges thereof leaving the center warm but rarer than the outer edges thereof.

Abstract: A conically shaped probe or forward portion on an air nozzle having a rearwardly extending hollow externally threaded portion providing an air flow duct. A supply of pressured air in communication with said air flow duct and having circumferentially spaced apart air outlets permitting air to flow from said air flow duct to an air flow gap and along the conical exterior surface of the probe, the COANDA effect functioning on this flow of air along the probe. A rotatable internally threaded collar is threadedly mounted on said hollow externally threaded portion of the probe and extends forwardly over and spaced from the plurality of air outlets and directing the flow of air through said gap to the external surface of the conical portion of the probe. The dimensions of the air flow gap may be varied by turning the collar to move it toward the conical portion of the probe or away therefrom.

Abstract: A system for coupling electrical power to a rotary shaft without mechanically contacting the shaft includes a stationary transformer primary core positioned adjacent but spaced from the shaft so that the shaft forms part of a complete magnetic flex path for the core, and an insulated conductor mounted directly upon the shaft in the form of a winding which is positioned to be inductively associated with the transformer primary.

Abstract: A system of automatically transferring vacuum uplift on the top of a roof to the underneath side of the roof membrane to shift the uplift pressure forces into the roof insulation and decking rather than on the roof membrane to prevent upward movement of the membrane and roof layer. A roof structure provided with one or more oneway or duckbill valves placed 3 feet in from the perimeter and on every outside corner at 50 foot intervals, which at their bases open into the area between a loosely laid membrane and the roof insulation in order to equalize the positive air pressure between the loosely laid membrane and the insulation with the minus air pressure which occurs on the top of the roof when wind blows across the roof.

Abstract: This invention relates broadly to an apparatus for shortening wires, cables and the like without requiring the disconnection of such wires and cutting off the ends thereof to achieve the shortening. The apparatus consists generally of a sheet metal or the like shortening device which has a degree of flexibility therein by means of which the shortening function is accomplished. The wire or the like to be shortened is affixed to lugs or the like which are struck from the edge of one portion of the device and from this portion extends a tail which is bent towards the aforesaid portion and the wire is affixed to the bend which is made in this tail portion. The amount of shortening of the wire is determined by the place where the tail is bent.

Abstract: A circuit for measuring the PH of fluids includes a coaxial symmetrical probe having a PH probe surrounded by a reference probe; the conductor on which the PH signal passes from the probe to the control panel is within a shield to which is applied the PH voltage; and the differential amplifiers which receive and process the PH and reference signals are mounted on a conductive surface to which is applied the PH voltage.

Abstract: A taped and double cemented or glued rubber joint for use in connecting together the lapped cemented ends of adjacent cured rubber membranes in a roof construction, and for giving protection thereto. The lapping ends of the cured rubber membranes are sealed together by means of cement or the like, providing an adhesive contact system sealing the seam between adjacent membranes. An additional sealing means is provided which is premade and is adapted to be caused to adhere to both portions of both of the overlapping adjacent rubber membranes. This tape or additional sealing means is a composite structure and is applied over the seam between adjacent membranes providing double sealing structure and the tape comprises a lower uncured gum rubber strip which is applied over a portion of one rubber membrane which laps over a portion of the other rubber membrane and also includes a portion which extends over and is cemented to a part of the other membrane and adjacent to the end edge of the rubber membrane.

Abstract: A multichannel salinity meter combines a semi-squarewave signal with a peak actuated detector to develop a salinity signal proportional to conductivity. Each salinity channel includes a separate presettable alarm level and alarm indicators provided by a blinking lamp at the salinity module, local and remote bells and a remote lamp. a bell cutout switch is provided to optionally silence the local and remote bell indicators. Each salinity channel provides a dump signal which may be used to control a dump valve whereby any alarm condition causes dumping of the water in the alarm channel. A test signal available to each salinity channel provides the instrument with a test mode.