Abstract: A fluid pressure reproducing relay is described having a high order of accuracy in matching the output pressure to the loading pressure under steady state conditions, having a large flow capacity for both supply and exhaust and which is small in size for its capacity, the relay having a resilient rolling seal with a vented seating arrangement that requires no clamping, having a stabilizing mass loosely attached to a force balance diaphragm assembly and in which a balanced area supply plunger is employed.

Abstract: Method for making tubular articles of tortuous configuration and of resin impregnated material. The method is intended to avoid resin-starved areas in the product. Specifically, tubular articles having high curvature, sharp transitions in cross section size and/or shape and close tolerance ends are provided these being made by applying and incorporating selectively placed porous components.The article is formed in a mold by an inflatable mandrel which carries a continuous, surrounding knitted fabric component and one or more localized foam, felt and/or fabric devices of porous nature which control the supply, flow and/or final disposition of resin matrix in the molding process.

Abstract: A process and apparatus for case hardening of ferrous metal work pieces is described in which the work pieces to be processed are placed inside a metal vacuum chamber which is evacuated with a mechanical pump and then backfilled with a partial pressure of a gas containing nitrogen, such as nitrogen or ammonia, or a hydrocarbon such as methane, or mixtures thereof. The work pieces to be processed are electrically connected to the negative (cathode) terminal of a D.C. power supply, the positive terminal being connected to the chamber wall and to ground. The power supply is energized and some of the gas is converted to ions. The work pieces are heated to temperatures of approximately 650.degree. to 1100.degree. F for ionitriding or to temperatures of approximately 1650.degree. to 1900.degree. for ion carburizing. The heating is effected at least in part by the ion activity.

Abstract: An ignition system for flares is described particularly suitable for use in remote areas with limited facilities and which includes as components a power source and specifically storage batteries with a solar battery for recharging and having an associated gasoline engine driven blower for supplying air for ignition, together with an ignition panel adapted for ready connection to a source of fuel gas, to the blower, to the power source, to the stack pilot, to the pilot ignitor and if desired to the flare header for purge gas supply. The panel preferably includes a manually oprable push button for an ignition spark plug, has indicators of pilot operation and has manual control of the delivery of fuel gas for ignition, for use as pilot gas and for use as purge gas. A thermocouple is provided at the pilot for control of indicating lamps indicative of pilot operation or non-operation as well as purge failure.

Abstract: Control apparatus is provided responsive to liquid flow which has in the suction line of the pump a float operated magnetically actuated switch in which the float is moved to one position by the presence of liquid attendant on flow and moves to another position upon cessation of flow with provisions including an expansible chamber for impelling the float to the other position either by delivering gas or air to the float chamber or by positively moving the float to the other position. The apparatus is particularly suitable for use in closed systems utilizing supply containers which are collapsed as the liquid is withdrawn.

Abstract: A leaf collector and comminutor is disclosed having a collection receptacle in the form of a bag and a housing for delivery of comminuted tree leaves into the bag, the housing having thereon a motor driven rotary blade assembly, having a fan portion and a leaf comminuting portion resiliently mounted on the fan portion, for the suction collection and comminution of the leaves to reduce their bulk and for delivery of the disintegrated leaves into the bag, a spring held shearing bar being provided with openings for passage of end portions of the blades, the mounting of the leaf comminuting portion of the blade and the mounting of the shearing bar providing safety features in the event that sticks or stones enter the housing.

Abstract: A flame retention apparatus for flare stacks for waste combustible gases is provided which includes fixed mounted guide vanes mounted at the top of the tubular stack and preferably spaced around the interior of the stack, the guide vanes having inclined or tilted terminal ends to impart a swirling or vortex action to a substantial portion of the waste gas exiting from the stack, and preferably with one or more teeth to impart added turbulence to the swirling portion of the waste gas.

Abstract: An isolation circuit with duty cycle feedback is disclosed which includes an operational amplifier with capacitive coupled negative feedback such that its output voltage varies to maintain its input terminals at the same potential, and which output is connected to the control terminal of a voltage controlled oscillator which generates a square wave voltage in which the ratio of ON time to the total period is directly related to the voltage from the operational amplifier. The output pulses of the voltage controlled oscillator are fed through a resistor to the negative input terminal of the operational amplifier. The output pulses from the oscillator are also fed through a driver transistor to control the input of an opto-coupler. The output from the opto-coupler passes through an amplifier to produce a square wave voltage with the same ON time ratio as the voltage controlled oscillator.

Abstract: A motor driven pump is described having an improved and simplified construction of pump casing and impeller with easy adaptability of the components over a wide range of capacity, an improved construction of the motor stator and rotor with structure which is adaptable for selection for use over a wide range of input, improved structure for alignment and support of the motor stator and of the motor rotor from a reference element referred to as a post, and without compounding and piling up of tolerances, and with adequate provisions for cooling and for pressure balancing.

Abstract: A cam follower roller bearing or yoke roller bearing in which there is a stud or inner race surrounded by inner rollers on which an outside roller is mounted, with the outside roller and inner rollers retained in position by some form of retainers on the ends, and annular grooves toward the ends of the inside of the outside roller in which grooves there are annular seals having in cross section an intermediate portion parallel to the longitudinal axis of the bearing and a radial outwardly extending portion at the longitudinally outer end of the intermediate portion and a radial inwardly extending portion at the longitudinally inner end of the intermediate portion, with the intermediate portion being held with interference fit on the longitudinally inner portions of the outside of the retainer, the outwardly extending radial portion loosely fitting against the outer wall of the groove, and the inwardly extending radial portion being between the inner end wall of the retainer and the corresponding end wall of t

Abstract: Dispensing apparatus is provided suitable for application of residual insecticides in a liquid carrier with which the fluid may be dispensed in spray form or delivered into cracks and crevices through an elongated tip extension of flexible plastic tubing and movable into, or out of operating position, the elongated tip extension being readily removable and insertable as desired.

Abstract: A self-aligning bushing is described which includes an inner spherical ball or ring with an outer socket or ring thereon, seals being provided engaged in sockets in an inner face of the outer ring and in sockets in an outer face of the inner ball or ring, the seals being of elastomeric material with built in rims which aid in the retention in the outer sockets and in retaining the shape of the seals, the spaces within the seals retaining lubricant for the contacting surfaces.

Abstract: A control circuit for bar graph display panels is described which reduces the tendency to drift, which obviates the necessity of maintaining an absolutely constant oscillator frequency and an absolutely constant ramp rate by utilizing a feedback system to reference the ramp end points to a single precise voltage.

Abstract: Heddle frames are disclosed which have heddle supporting rods with provisions for impact resistance, for reduction of wear and abrasion, and for noise reduction, which is accomplished by using heddle rods with impact absorbing material at the impact and wear surfaces which contact the heddles. The heddle supporting rods in long frames may be supported intermediate their ends, and the heddles may have C, J, or O shaped end eyes, different heddle rod cross sections and be of differing materials depending upon the requirements of the particular installation.

Abstract: A heater for butter and the like is disclosed, which includes a tubular cylindrical housing, preferably of sheet metal, flared at the upper end for retention of a cup-shaped receptacle whose contents are to be heated. The housing is elevated on and supported by a plurality of strips the lower ends of which extend downwardly and outwardly and provide legs, and the upper ends of which extend upwardly and outwardly and provide handles. A plurality of openings are provided in the wall of the housing for access of air to the interior. A vertically movable heater support is provided in the interior of the housing having a base portion and an upright arm with a threaded stud extending outwardly through aligned slots in one of the strips and in the housing wall with a nut accessible on the exterior for locking the base portion at the desired adjusted position of elevation. The base portion supports a cup, preferably of metal, for a candle employed for supplying heat.

Abstract: A pilot gas conservation system for flare stacks is provided in which the activation and control of the pilot gas burners is determined by the wind conditions so that if no flare gas is flowing the pilot burners are shut down and with moderate and minor wind conditions the supply of pilot gas is maintained at a lower level than that required for higher wind velocities. A flow responsive switch is provided to determine the flow of waste combustible gas to the stack so that, if required, the effect of the wind speed determines the pilot gas flow.

Abstract: A flare gas stack is described with a purge gas conservation system adapted to control the flow of purge gas in accordance with the specific gravity of the purge gas, and prevailing conditions including cutting off the purge gas flow when conditions of waste gas flow and wind speed near the top of the stack permit. Provisions are made for visual observation of the waste gas flow, purge gas flow and purge failure.

Abstract: A pressure to electric transducer is described employing an electrical capacitance formed by two parallel metal plates separated by a variable air gap, one of the plates being fixedly mounted and the other being movable to change the spacing in direct proportion to fluid pressure acting on an input element or capsule to which the movable plate is connected. The capacitance forms one leg of a negative feed back divider network, for controlling an operational amplifier so that its gain is directly proportional to the spacing of the plates. The amplifier is driven by a constant alternating current source so that its output is directly proportional to the applied pressure. The voltage output can be rectified and transformed in a conventional manner for transmission of a signal.

Abstract: Apparatus and methods are provided for making a continuous chain of interengaged loops, preferably of molded synthetic plastic, which employs a plurality of sets of separable dies with loop forming cavities which are preferably in planes at 90.degree. to form a length of interengaged links, certain dies of each set being advanced to advance the chain, and returned to the beginning for subsequent advance, provision being made for formation of a link engaging an end link of a previously formed link of a length of interengaged links and for making links of the chain of different colors.