Abstract: Where a formulated glass cullet is utilized as a portion of the pulverulent batch material, the cellular material is prepared by first grinding the glass cullet in a ball mill with a cellulating agent such as carbon black until the pulverulent material attains an average particle size of about 4 or 5 microns. The pulverulent batch containing the glass cullet and cellulating agent is then sintered at a sintering temperature for a sufficient period of time to permit the glass cullet material to soften and coalesce and increase in density without, however, cellulating the glass batch. The sintering process is then interrupted and the sintered material may be cooled and crushed to a size that passes through a United States 10 mesh screen. The crushed and screened sintered material is then positioned in a suitable mold and subjected to a cellulating temperature of between about 1600.degree. F. (870.degree. C.) and 1650.degree. F. (899.degree. C.

Abstract: An intimate mixture of an amorphous silica potassium oxide, boric oxide, alumina and a cellulating agent is subjected to a temperature of between 1390.degree. C. to 1450.degree. C. for a sufficient time to coalesce the mixture and gasify the cellulating agent and form a cellular body. The mixture is prepared by first forming a slurry and, drying the slurry to form aggregates, and are thereafter comminuted if necessary to form a pulverulent batch. The pulverulent batch is heated in a cellulating furnace to a foam-like mass which is comminuted to form a precellulated material. The precellulated material is mixed with additional cellulating agent and pulverulent batch in preselected proportions and heated in a furnace to gasify the cellulating agent to form a cellular body. Alternatively alumina, boric oxide, an alkali metal salt and a cellulating agent are comminuted and mixed in a ball mill. Thereafter, amorphous silica is added to form a mixture containing more than 80% silica.

Abstract: A brake mechanism is mounted on a vehicle and includes a housing having a slot for receiving a rotatable disc to be braked. The upper portion of the housing includes a chamber for receiving pressurized fluid from a source. A spring actuated piston is slidably and sealingly disposed within the chamber. A removable spring assembly is positioned forwardly of the actuating piston and exerts a preselected spring force thereon. When the fluid pressure acting against the piston is less than the spring force applied to the piston, the piston moves axially in the chamber and a rod portion thereof contacts a lever that is pivotally mounted to the housing. The lever pivots on the housing to axially displace a brake applicator piston that is movably positioned in the housing adjacent to the rotatable disc. A plurality of braking pads are secured to the end portion of the applicator piston and additional braking pads are secured to the brake housing opposite the disc.

Abstract: A flexible seal member is secured to the periphery of the body of a coke oven door that is shaped to the contour of the receiving door jamb of the coke oven body. A seal edge of the seal member contacts the jamb in sealing relation. A plurality of spring pressing elements secured to the periphery of the door exert a constant sealing pressure on the seal member to maintain the seal member in sealing relation with the jamb. A plurality of stop mechanisms arranged on the periphery of the door maintain a preselected distance between the fastening point of the seal member to the door and the sealing surface of the jamb. A plurality of latching mechanisms positioned at selected regions on the door and secured to the coke oven body are operable to bend the door according to the contour of the jamb as the door experiences deformation during the coking operation. The bending of the door is also enhanced by reducing the moment of resistance of the door by providing longitudinal recesses therein.

Abstract: Hot rolled round stock is fed in a first stage through a pair of rotating work rolls having a rough, rugulose concave surface that frictionally engages the surface of the stock to deform the surface of the stock by the application of pressure thereto and thereby dislodge substantially all the mill scale therefrom. The engagement of the work rolls with the stock provides positive drive to the stock to rotate the stock so that the stock advances in a spiral course without skidding through the work rolls to a secondary scale remover that includes a descaling machine for removing the remaining scale from the surface of the stock. A plurality of blast units within a chamber of the descaling machine directs a stream of abrasive particles upon the entire surface of the stock to dislodge the remaining scale therefrom and form a bar free of scale. The bar is advanced in a third stage to a rolling mill that includes a plurality of cross-rolling units in a series arrangement.

Abstract: A cylindrical valve spool is slidably positioned in a chamber of a valve housing having a plurality of fluid inlet ports and a plurality of fluid outlet ports. The valve spool is movable to a selected one of a plurality of positions to interconnect a selected inlet port with a selected output port. A detent apparatus is associated with one end of the valve spool and is operable to lock the valve spool in one of three positions in the chamber. A remotely operated first pilot valve is operable to convey pressurized fluid to either end of the valve spool and thereby shift the valve spool to either a first or second end position for interconnecting selected inlet and outlet ports. A centering device is operable to shift the valve spool from either detented end position to a detented center or neutral position by deactivating the pilot valve and simultaneously conveying pressurized fluid from a second pilot valve to the centering apparatus.

Abstract: A paper web is unwound and conveyed through an envelope making machine where a side flap cutting device forms side flaps in the side edges of the web. Scorer rollers form longitudinal scores in the side flaps and the side flaps are thereafter folded along the score lines. Other scorer rollers form transverse score lines for the top and bottom flaps of the envelope. Envelope blanks having the folded side flaps are thereafter severed from the web and separated from each other. After the blanks are severed from the web, gum is applied to the upper surface of the side flaps of the severed envelope blanks and the bottom flap is folded into overlying relation with the folded side flaps to form the pocket in the envelope. The so formed envelopes are thereafter collated into overlying relation with the edges of the top flap exposed. Gum is applied to the top flaps and dried. The top flap is then folded into overlying relation with the bottom flap.

Abstract: A gas analyzer is provided which is comprised of two gas sample flow loops joined at an angle to each other, one being an eductive loop that originates and returns to the chamber or conduit from which a gas sample is to be drawn and the other being a convective loop that joins in fluid flow communication with the eductive loop at a point upstream from its eductor device.

Abstract: An earthen structure for holding back a body of water has a sloped surface which is paved with an overlapping arrangement of strips constructed of castable material. Each strip is formed by conveying castable material from a mobile receiving hopper that is propelled adjacent to the base of the earthen structure. A bridge conveyor projects laterally from the receiving hopper over the slope. The bridge conveyor deposits the castable material onto the slope forwardly of a spreader device that is advanced longitudinally relative to the slope by a prime mover. A scraper blade of the spreader device is positioned at a preselected elevation by a forwardly projecting sidewall which is connected to the blade and slidable on a previously formed strip. The sidewall maintains the castable material in front of the blade, as the advancing blade spreads the material in a longitudinal strip of a preselected thickness and having a lateral edge extending a preselected lateral dimension outwardly from the sloped surface.

Abstract: An earthen structure for holding back a body of water has a sloped surface which is paved with an overlapping arrangement of strips constructed of castable material. Each strip is formed by conveying castable material from a mobile receiving hopper that is propelled adjacent to the base of the earthen structure. A bridge conveyor projects laterally from the receiving hopper over the slope. The bridge conveyor deposits the castable material onto the slope forwardly of a spreader device that is advanced longitudinally relative to the slope by a prime mover. A scraper blade of the spreader device is positioned at a preselected elevation by a forwardly projecting sidewall which is connected to the blade and slidable on a previously formed strip. The sidewall maintains the castable material in front of the blade, as the advancing blade spreads the material in a longitudinal strip of a preselected thickness and having a lateral edge extending a preselected lateral dimension outwardly from the sloped surface.

Abstract: A gathering platform extends forwardly from the front end of a mixing machine and has an upper surface in which a pair of counter-rotating gathering discs are rotatably mounted. Each disc is rotated to move mined material centrally and rearwardly on the platform upper surface toward a material guide that extends rearwardly in overlying relation with a portion of each of the gathering discs to the receiving end of a longitudinally extending conveyor. A plurality of radially extending slots extend through each disc, and a material gathering arm is positioned in each slot. One end of each arm is connected to rotate with the gathering disc. The opposite end of the arm rides on a cam surface in the gathering platform. The cam surface has a first portion and a second portion. The second portion is positioned at an elevation below the first portion and beneath the material guide.

Abstract: An earthen structure for holding back a body of water has a sloped surface which is paved with an overlapping arrangement of strips constructed of castable material. Each strip is formed by conveying castable material from a mobile receiving hopper that is propelled adjacent to the base of the earthen structure. A bridge conveyor projects laterally from the receiving hopper over the slope. The bridge conveyor deposits the castable material onto the slope forwardly of a spreader device that is advanced longitudinally relative to the slope by a prime mover. A scraper blade of the spreader device is positioned at a preselected elevation by a forwardly projecting sidewall which is connected to the blade and slidable on a previously formed strip. The sidewall maintains the castable material in front of the blade, as the advancing blade spreads the material in a longitudinal strip of a preselected thickness and having a lateral edge extending a preselected lateral dimension outwardly from the sloped surface.

Abstract: One or more breakable cartridges containing a two component resin system are inserted in a bore hole drilled in a rock formation by an elongated roof bolt. An expansion shell assembly is positioned on the end of the bolt and includes a shell formed by a plurality of bendable fingers surrounding a camming plug. The camming plug is threadably engaged to the end of the bolt. A clip member is non-rotatably secured to the shank of the bolt and extends into one of the longitudinal slots that separates the fingers of the shell. After the cartridges and bolt are advanced into the bore hole, the cartridges are compressed between the end of the bore hole and the end of the bolt and fractured to release the resin components.

Abstract: A trolley wire for conveying direct current power to an electrically powered vehicle in an underground mine is connected in series with a shunt to a power source. The current drawn by the trolley wire passes through a circuit breaker and the shunt. The shunt generates a voltage input signal proportional to the current drawn by the trolley wire. A solid state comparator device receives the input signal and compares it to a reference signal having a magnitude representing the maximum level of current permitted to flow through the conductor. If the reference signal exceeds the input signal, the comparator device supplies an output signal that oscillates between a positive and a negative voltage to a trip circuit. The output signal actuates the operating coil of the circuit breaker so that the circuit breaker contacts remain closed to permit current to flow through the shunt to the trolley wire.

Abstract: A plurality of traction devices are positioned transversely in spaced relation on a tire tread. Each traction device has a first end portion arranged to be guided into one of a plurality of troughs that are positioned on the periphery of a circular member mounted to the unexposed or inside rim of a vehicle wheel. The troughs are separated by crests to form a wave-like configuration on the periphery of the circular member. The first end portion is guided into a trough without the need to visually locate the point of attachment on the circular member. A portion of the first end portion is too large to pass through the trough and serves to secure the traction device to the inside circular member. A second end portion of the traction device is secured on the opposite side of the tire by connection to a second circular member or to the ends of the other traction devices to tightly position an antiskid body portion of the traction device on the tire tread.

Abstract: A valve member is axially supported for reciprocal movement within the lower portion of the chamber of a valve housing. The chamber lower portion is sealed from the chamber upper portion by a flexible diaphragm assembly. The valve member includes a cap maintained in abutting relation with the lower surface of the diaphragm assembly. A valve stem is coaxially aligned with the valve member above the diaphragm assembly and includes a head portion that abuts the diaphragm assembly opposite the cap. Downward movement of the valve stem is transmitted through the diaphragm assembly to downwardly move the valve member into sealing relation with the valve seat. The valve is opened by advancing the valve stem upwardly within the chamber. A Belleville spring assembly surrounding the valve member urges the valve member to move away from the valve seat to open the valve.

Abstract: The mine roof support system includes a plurality of truss members each having opposite end portions and are operable to be moved into and out of abutting relation with a mine roof by a plurality of prop members. Each prop member includes an upper end portion connected to a respective end of each truss so that a pair of prop members is associated with each truss member. Each prop member includes an extensible portion and a shoe which is adapted to support the prop member for slidable movement on the mine floor. Guide mechanisms connect the extensible portion and shoe of each prop member to prevent relative movement between the upper end of the prop member and the shoe. The truss members are stabilized by a stabilizer device, such as a stabilizer bar secured to and extending downwardly from the end of each truss member and connected to the extensible portion of each prop member.

Abstract: A vertical frame is supported forwardly on a self-propelled mobile frame that includes a longitudinal conveyor. A gathering device is supported by the mobile frame and extends laterally at an inclined slope from the conveyor to direct the harvested fruit onto the conveyor. A shaker mechanism includes a plurality of spaced vertically extending bellcrank levers that are rotatably journaled at their end portions to the vertical frame member. A plurality of horizontally positioned shaker rods are secured in spaced parallel relationship on the levers. The bellcrank levers are linked by eccentric mechanisms to the output shaft of a motor. Rotation of the output shaft rectilinearly orbits the eccentrics in a horizontal plane to oscillate the levers back and forth and horizontally move the shaker rods to compact and vibrate the limbs of the tree and thereby dislodge the fruit from the limbs.

Abstract: An input shaft is drivingly connected to a crankshaft of a punch press for rotation at a preselected speed. A geared cam drive drivingly connects the input shaft to a driven feed roll so that continuous rotation of the input shaft is converted to intermittent rotation of the feed roll. The intermittent rotation of the feed roll is timed with the punching operation so that the feed roll intermittently advances a preselected length of stock material to the punch press after each punching operation. Bevel gears drivingly connect the input shaft to a pull roll that rotates to continuously unreel stock material from a coil. During the punching operation, rotation of the feed roll is interrupted forming a loop in the stock material between the pull roll and the feed roll.

Abstract: A brake mechanism is mounted on a vehicle and includes a housing having a slot for receiving a rotatable disc to be braked. The upper portion of the housing includes a chamber for receiving pressurized fluid from a source. A spring actuated piston is slidably and sealingly disposed within the chamber. A removable spring assembly is positioned forwardly of the actuating piston and exerts a preselected spring force thereon. When the fluid pressure acting against the piston is less than the spring force applied to the piston, the piston moves axially in the chamber and a rod portion thereof contacts a lever that is pivotally mounted to the housing. The lever pivots on the housing to axially displace a brake applicator piston that is movably positioned in the housing adjacent to the rotatable disc. A plurality of braking pads are secured to the end portion of the applicator piston and additional braking pads are secured to the brake housing opposite the disc.