Abstract: A method for enhancing chemical reactions in a constantly flowing stream of liquid character fortified with oxidizing agents, such as air or oxygen or other chemical agents, makes use of an inner resonant tube concentrically mounted within an outer resonant tube with the walls of the tubes spaced from each other forming an annular passageway for the flow of liquid from one end of the passageway to the other. One or more sets of radially spaced ultrasonic transducers are located on the outside wall of the outer resonant tube thereby to create an ultrasonic cavitation condition in the liquid as it flows through the annular passageway.

Abstract: A seamless coating system especially applicable to a welded bell and spigot type joint for steel pipe of exceptionally great length and diameter features a double layer of coating material applied to the outside surface of the pipe and extending over the joint. Use is made of a filler bridge of substantially solid elastomeric material which, though yieldable when covered with the coating material and compressed, yields only to a limited degree. The bridge is made slightly thicker than the thickness of the pipe wall so that when the bridge is applied against a sharp corner at the joint, the bridge material extends above the corner both before and after two successive layers of coating material are applied to the exterior of the pipe wall and the joint.

Abstract: A method for rapidly and accurately evaluating the number of errors in a test document typed by a test applicant makes use of an original sample master sheet having subject matter imprinted on it in conventional type with margins and spacing established by rule. There is a duplicate of the original master sheet printed in the same type in white ink on a transparent check sheet having identical margins and spacing to those for the master sheet.The test document is typed in black ink of the same type by the person whose skill is to be tested, using the same margins and spacing as directed for the original master sheet.The transparent check sheet is placed over the test document with edges of the sheets in alignment. The white typed subject matter should be in alignment with the black typed subject matter. Errors are revealed by non-aligned black portions of the typed letters on the test document where they do not perfectly match the white letters.

Abstract: A fluid flow control valve system to be used to control a hydraulic lifting mechanism used on elevators and the like. The valve system includes an inlet conduit from the pump and an inlet-outlet to and from a jack connected together by a conduit with a one-way valve operable in the direction from the pump to the jack, a first by-pass chamber connected to the pump side of the one-way valve and a second by-pass chamber connected to the jack side of said one-way valve, outlets to the pump sump from each by-pass chamber, and a movable gate control mechanism for controlling the exit of pressurized fluid from the first by-pass chamber or the second by-pass chamber through the outlets to the pump sump. Hydraulic fluid from the pump when the first chamber is sealed, passes through the one-way check valve. When the second chamber is also sealed, the fluid will provide pressure to a jack to lift a load. With the first chamber gate opened at least a portion or all of the fluid passes back to the sump.

Abstract: A low-slung carriage-mounted lifting jack has a long tubular handle for projecting the jack beneath a conventional automotive vehicle. The handle is tiltably mounted on the carriage and simultaneously serves as a pump handle for pumping hydraulic fluid from a reservoir to a ram which in turn is operatively attached to an elevating linkage for lifting the vehicle. A pump, for operation of which the handle is tiltably mounted on the carriage, delivers hydraulic fluid under pressure from the reservoir to the ram. To release hydraulic pressure in the ram, for lowering the linkage and returning the fluid to the reservoir, there is a release valve with a release pin projecting adjacent the end of the handle which is tiltably mounted on the carriage. Within the handle is a rotatably mounted rod extending throughout the length of the handle, and on the end of the rod is a cam in operating engagement with the release pin.

Abstract: One part of a key-in-knob lock set functions in a normal manner such that when the lock set is unlocked, either the outside or inside knob can be manipulated to open the door by withdrawing the latch bolt from a normal spring latch extended position. When, instead, the lock set is locked, the latch bolt is extended an exceptionally long distance into the frame to a dead bolt position. Extension and retraction of the latch bolt to and from dead bolt position is accomplished by manipulation of a main cam through the agency of a key in the outside or a turn button on the inside.For withdrawing the latch bolt from the normal spring latch extended position, an escutcheon housing for the outside knob or a corresponding escutcheon housing for the inside knob serves, by moving transversely of the axis of rotation of the knob, to rotate a radially extending tooth-like element on the spindle which, acting through the main cam, withdraws the latch bolt.

Abstract: In a four-wheel drive vehicle wherein the forward pair of wheels is driven through one differential assembly and the rearward pair of wheels through another differential assembly there is a transfer case through which power originating in the engine is distributed, or transfered, to the two differential assemblies. In the transfer case there is normally a third differential mechanism to compensate for differences in performance between the forward pair of wheels and rearward pair of wheels during on-the-road travel. The conversion kit of the invention makes use of a direct power transfer component in the transfer case at a location taking the place of the third differential mechanism, previously removed from the case.

Abstract: A continuously varying electrical signal representing an original musical sound is divided at a selected mid-frequency of about 800 Hertz to provide upper and lower frequency signal bands which are then frequency-modulated with separate modulation signals that differ in frequency or amplitude or both, in order to produce a vibrato or tremulant effect and thereby enrich the harmonic content of the musical sound.In order to inject the vibrato or tremulant into each signal band, the modulation process utilizes a pulse sampling and delay circuit which minimizes clock pulse noise by selecting only the central part of each delayed pulse, and which also senses the original amplitude envelope of the unmodulated wave in order to augment the envelope that is recreated from the delayed pulses after they are recovered.

Abstract: The invention makes use of a second thermostat in an engine cooling system, normally equipped with only a single thermostat. The second thermostat differs from the single thermostat in that provision is made for a constant, though materially diminished, flow of coolant past the second thermostat which, when the need arises, is converted to full flow by action of the second thermostat.

Abstract: A hydraulic elevator is employed having the usual call buttons at the respective floors and selector buttons for all floors located in the elevator cab. When a button is pushed to select a floor to which the cab is to travel, up or down, as the case may be, the cab starts moving slowly in the selected direction. During initial movement a cam on the cab triggers components in an electric circuit which, by motivating hydraulic valving causes the cab initially to accelerate to a selected rate of travel after which travel proceeds at the selected rate to a slow down point. At that point another component is triggered and the valving causes the cab to decelerate for a selected interval of travel, after which the cab moves slowly to the level to which it was called.The invention here disclosed is one of a balanced electric bridge circuit which is made constantly sensitive to the rate of travel of the cab by use of a stationary tape extending for the full height of the vertical hoist way.

Abstract: In a control system for delivery of steam at a predetermined pressure to the head of an oil well for use in an open orifice bottom hole heater, a boiler, remote from the well head, is connected by a steam delivery line through a series of valves with a steam pipe extending downwardly into the well to the orifice location near the bottom. In the steam delivery line is a main valve, downstream of which is a pressure regulator and upstream of which is a back pressure regulator. A sensing pressure line from the pressure regulator taps into the delivery line near the well head and a control line from the pressure regulator connected with the main valve control. A back pressure line from the back pressure regulator connects with the delivery line near the boiler and a control line from the back pressure regulator connects with the main valve control.

Abstract: A fitting for anchoring together adjacent sections of rope or cable makes use of a housing with parallel, oppositely positioned frustoconical holes, each adapted to accommodate a pair of complementary wedge sections. Each wedge section of the pair has a semi-cylindrical recess for engaging a corresponding section of rope and a tapered exterior which matches the interior of the corresponding frustonical hole. The two wedge sections engage opposite sides of the section of rope and grasp the rope tightly when drawn into the hole as tension is applied to the rope.

Abstract: An electronic sound system especially effective with bell sounds synthesizes the approximate sound of each bell in a set of 49 switch operated bell sounds. The synthesizing is accomplished by utilizig an envelope generator for each partial of a group of 7 partials for each of the 49 sounds, in association with a single 73 note wave generator. The envelope generators for low partials of each group of 7 are slow attack, slow decay relatively long envelopes. The envelope generators for the high partials of the same group of 7 are fast attack, fast decay relatively short envelopes, and envelopes for certain intermediate partials are fast attack with combined short and long decay envelopes of intermediate length. There is a single wave generator for each of 73 tones, the wave generators having circuits interconnecting them with partials of common frequency of the various groups of 7 partials for the respective keys.

Abstract: A tubular pipe rail jointing system consisting of posts and rails makes use of fittings on the posts providing sleeves into which ends of the tubular pipe rails are telescopingly received. For effective fabrication and erection it is preferable to cut the tubular pipe rails to proper length on the site. To assure a rugged installation, a dimple is pressed into the sleeve with a pressure punch of special construction. A cradle forming part of the tool fits around half the circumference of the sleeve while the punch under high pounds per square inch pressure is pressed progressively into the sleeve, at a point diametrically opposite the cradle, until material of the sleeve, deformed by the punch, is forced into a depression formed simultaneously in the end of the tubular pipe rail. The assembly described becomes interlocked by what has been termed a swedge lock.

Abstract: A method of casting metal so that the finished casting will hold a precise dimension in certain critical areas in order to enable the finished casting to be used as a frame for objects such as coins and medallions which are die struck to precise dimensions. Means of and apparatus for rigidly maintaining the object inside the cast frame by inexpensive means which will not damage the object and which will allow the object to be easily removed from the frame if necessary.

Abstract: A loose-leaf binder makes use of a hinged back comprising parallel hinge leaves pivotally attached to each other at adjacent edges. There is an interlock at one end consisting of resilient flanges normally interlocked in overlying relationship, but releasable by tilting one flange away from the other. Rings which extend through the holes in sheets of paper may be individually mounted in a retention track so that they can be varied as to spacing and also varied as to the number of rings made use of.

Abstract: An object or toy, naturally attractive to small children and infants, is provided with a receptacle at an advantageous location for reception of a nipple serving as a pacifier. The nipple in turn is one suitable for being individually sterilized from time to time. The receptacle is therefore provided with a releasable clamp, effectively concealed within the toy, but capable of releasably grasping a smoothly contoured projection on one end of the nipple to hold it in position on the toy from which it can be released at will.

Abstract: A dual type dispenser for dispensing two materials in equal quantities consists of two barrels joined together and a plunger for each barrel. Since occasions may arise when the barrels are to be used separately, the junction between the barrels is separable, as by a sliding interlock. The plungers also, although initially attached together at the handle to make certain they are moved together, are arranged to be broken apart for use separately with the separated barrels.

Abstract: When a Hydraulically operated valve is used to control the operation of a hydraulic elevator, it is required to do so in a manner such that as the elevator cab approaches a floor level in either direction, it is first decelerated through a transition cycle and after that moved slowly a short distance through a creeping cycle to the floor level where it stops. In the up direction, an extra heavy load cuts the transistion time and adds objectionably to the time needed for up leveling. The compensating valve of the invention is interposed in the hydraulic line of the operating valve which normally is depended on to cause deceleration for transition, replacing the deceleration valve. A plunger in the compensating valve is shifted by an increase in hydraulic pressure resulting from an extra heavy load.