Abstract: Disclosed is a heating unit consisting of a boiler chamber in which a two-phase liquid system is placed under a slight vacuum and supplied with a source of thermal energy. The activation of the source of thermal energy causes the lower phase liquid to vaporize and percolate through the upper phase liquid and circulate into a radiator section made up of finned tubes with an air flow being directed thereacross. The air flow absorbs the heat of the vapor which then is directed to the areas to be heated. The vapor continues to circulate into a header where the vapor is condensed back to the liquid state by a plurality of finned condensation tubes inside the header. The finned tubes of the radiator section have 90.degree. elbows extending upwardly into the header to prevent any condensed liquid from returning into the radiator of the system, and directing the vapor toward the coldest side of the header so as to enhance the condensation process.

Abstract: A method for carrying out reactions of the Friedel-Crafts type, such as alkylation, acylation, polymerization, sulfonylation and dehydrohalogenation. The reactions are catalyzed by arene-metal tricarbonyl complexes and when the reaction vessel contains aromatic substrates the catalyst may be generated in situ from a metallic hexacarbonyl. The arene-metal tricarbonyl catalyst is more selective than conventionally employed Friedel-Craft catalysts in that it yields generally para isomers with little of the ortho variety and very little if any of the meta variety when the aromatic substrate is reacted with organic halide. It is also possible to form the arene-metal tricarbonyl catalyst outside of the reaction vessel and then proceed by adding it to the vessel containing the substrate and the organic halide as is the case with dehydrohalogenation reactions wherein there are no aromatic rings available, the substrate in that instance being aliphatic.

Abstract: An actuator for an automatic transmission modulator valve which automatically changes shift speeds proportional to demand on the engine from idle to full throttle. The actuator is preferably controlled by a push-pull cable operatively connected to the throttle or accelerator, and exerts pressure on the push pin of the modulator valve in direct proportion to the travel of the throttle. The actuator utilizes balls between inclined surfaces on interfacing rotary and stationary cam plates and the cable applies rotating force through a moment arm to the rotary plate to obtain a substantial mechanical advantage in the amount of pressure applied to the push pin.

Abstract: A shoe rack or tree comprising wire racks tiered one above another and independently rotatable on a central column supported on a base. The racks are separated by spacer sleeves encircling the column and a disk cover is mounted on the upper end of each spacer sleeve for covering over the wire rack below.

Abstract: A machine for molding a plurality of tubular articles and gang stripping them in one operation. The mandrels for molding the articles are mounted between the mold platens in a frame having a front cross bar which has cavities forming the ends of the articles. When the platens are separated and the mold opened, the frame is moved laterally of the machine and the cross bar is automatically moved away from the ends of the articles to a removable position. A stripping rack is then moved manually into position to clamp and strip all of the articles simultaneously from the mandrels.

Abstract: An automatic cleaner for overhead conveyor rails which has independently driven wheels riding on the rail and supporting a carriage having vertically disposed rotatable brushes which are axially rotated for progressively cleaning opposite sides of the rail as the carriage traverses the rail in either direction. The brushes are automatically adjusted vertically while rotating to avoid interference with rail hanger brackets and other obstructions on the rail.

Abstract: A truss having parallel wood chord members and diagonal web members therebetween connected to the chord members by toothed metal plates. The diagonal web members under compression are wood having their ends fitted into notches in the chord members and the web members under tension are preferably metal with their ends connected to one side of the chord members by toothed plates which overlie the notches. The toothed plates connecting the ends of the compression members to the chord members overlie the notches on the other side of the chord members.

Abstract: An apparatus is disclosed for preventing tampering with a locking mechanism, such as the conventional cylinder lock, which has a keyway therein and is normally rotatable when a key is in the keyway. A locking arm normally holds the locking mechanism to prevent rotation thereof even when the key or a foreign device is in the keyway. In order to release the locking arm and rotate the locking mechanism, access to the keyway is first blocked thereby prohibiting someone from attempting to pick the lock with a foreign device.

Abstract: A curing press for tires having relatively movable upper and lower mold sections, a center mechanism, a housing in the center mechanism, a hub attached to the housing, a bead ring carried by the hub for engaging the lower bead of a tire, a lift mechanism operatively engaging the housing for moving the hub relative to the lower mold section, and mold blow out apparatus on the hub for directing pressurized fluid into contact with the lower mold section during the movement of the hub relative to the lower mold section to remove residual foreign matter therefrom.

Abstract: Hinge mechanism for locking the two foldable sections of an extension stepladder in spread-apart position. Each section has a locking pin and slot at its upper end for interlocking with a complementary slot and pin on the other section when the sections are swung apart on one of said pins as a pivot, the pin and slot on one section being disengageable from the slot and pin on the other section by relative longitudinal movement of the sections when the sections are folded together.

Abstract: A tapered tubular chair base leg is formed from a tube of uniform cross section throughout its length by deforming the bottom wall and adjoining portions of the sidewalls of the tube inwardly to produce an interior rib which is inclined throughout its length relative to the longitudinal axis of the tube. The smaller end of the formed tube is then formed to close the end and provide a downwardly open bore for frictionally embracing a tubular caster-mounting bushing.

Abstract: An apparatus for controlling sequence and duration of the operational steps in processes such as vulcanization of a pneumatic tire is capable of operating under two basic modes or parameters. In one mode the operational steps are dictated by elapsed real time, while in the other mode, the operation can be dictated by elapsed cure equivalent factors. The desired length of each step or the cure, whether in time or cure equivalents, is set into an input program means. In the time mode, time generating circuitry provides an output proportonal to elapsed time which output is displayed on a counter and electrically compared with the information in the input program means. When a match occurs, the time generating circuitry and displays are reset and the input program means directs the tire vulcanization press to perform the next sequential function. Also disclosed is circuitry which is capable of performing secondary functions such as extending the length of a step, as necessary.

Abstract: Apparatus for continuously metering small amounts of comminuted plastic color pigment or concentrate in desired proportions to a volume of resin being supplied to an extruder. The feed of the color concentrate is accurately metered by a controlled electromagnetic vibrator and delivered into the resin feed throat of the extruder.

Abstract: Disclosed is a novel bigraft copolymer comprising a polyhydrocarbon backbone selected from the class consisting of aromatic homopolymers, saturated and unsaturated hydrocarbon homopolymers, such homopolymers having halogen functionality and copolymers and terpolymers formed therefrom, and two different branches which are selected from the group consisting of monovinyl aromatic compounds and isoolefins. The bigraft copolymer is formed by the selective sequential cationic initiation of a first charge of one monomer onto the backbone at specific functional positions thereon and in the presence of a suitable solvent and an alkylaluminum compound. The resultant monograft copolymer is subsequently subjected to a second charge of another monomer, in the presence of a suitable solvent and an alkylaluminum compound, which becomes polymerized at the remaining, different functional positions available on the backbone.

Abstract: Apparatus for suspending a pipe from a structural member, such as a beam, having a projecting flange with a proximate layer of building material, wherein a beam clamp having jaws and a fastening device for holding the beam clamp on the beam flange also has a rib on the outside of one jaw extending longitudinally thereof to facilitate insertion of the jaw between the beam flange and the proximate layer of building material and to resist turning forces applied to the beam clamp. The beam clamp has a securing device in one end communicating with a tapered recess in the other end forming a guideway for a connecting rod which carries a collar for supporting the pipe. The collar has embossments to provide limited contact between the collar and the pipe to reduce resistance to rotation of the pipe, as for threading it into another pipe member.

Abstract: An apparatus for maintaining a fluid supply, such as human blood going to a hospital patient, at optimum temperatures comprises an electrically heated inner mandrel maintained at a thermostatically controlled temperature. A substantially flat plastic bag having sealed linear forming labyrinth liquid flow passageways is wrapped around the mandrel and supply and exhaust tubes are connected to the ends of the passageways. An outer housing having a pair of hinged wings is provided for holding the bag in wrapped-around contact with the mandrel. The linear sealed areas are interrupted by spaced gaps adapted to inhibit the accumulation of air bubbles along the sealed linear areas.

Abstract: Apparatus for surface cleaning of workpieces by blasting comprising an elongated rotatable cage having longitudinally spaced rings through which the workpieces are conveyed axially, while they are being blasted, by means of oscillating arms extending between the cage rings and engaging the workpieces.

Abstract: Disclosed is a method and apparatus for detecting the presence of an embolism, such as air, during extracorporeal circulation in tubing carrying blood or other fluid such as would be present in the use of an artificial kidney machine. Electrodes are placed near the tubing to monitor the impedance thereof as well as the impedance of the fluid passing therethrough. An oscillator is attached to the electrodes and puts out a signal, the frequency of which is proportional to the basic impedance of the tubing and fluid. When an air bubble or the like passes the electrodes, the impedance will change causing a change in the frequency of the signal of the oscillator. The difference between the normal frequency and the changed frequency is indicative of the size of the embolism.

Abstract: Disclosed is an instrument wherein the pressure or flow of a fluid in a pipeline is monitored with a voltage proportional thereto being electronically differentiated to determine whether any rate of change of pressure exists, which is often indicative of a leak in the pipeline. If a rate of pressure change of a predetermined extent exists for a predetermined period of time and if a total pressure change exceeds a predetermined value, an output signal can close a valve in the pipeline or can sound an alarm. In addition, in situations where a liquid is involved, a surge develops upon a line break, that is, a large rate of instantaneous pressure drop, and such surge can also be detected and appropriate remedial measures taken. The instrument is also capable of shutting down the pipeline in instances of inordinately low or high pressure conditions.

Abstract: A fire extinguisher package or assembly adapted for attachment to the top rim of a waste receptacle. A small translucent plastic container holds pressurized extinguisher liquid and a heat-activated valve for discharging and directing the liquid is connected to the top of the container and enclosed in a protecting shroud. The shroud or a cover therefor is mounted on the receptacle rim by releasable attaching means.