Abstract: Apparatus and process for the recovery of particulate material lost during the passage of a surface treatment blast head having a magnetic particle seal over the surface under treatment. Wipers adapted to substantially contain the leakage material are spaced in close proximity around the outside perimeter of the magnetic seal. One or more slotted vacuum tubes are positioned between the magnetic seals and the wipers; each vacuum tube being interconnected by hoses or pipes to a recovery chamber which, in turn, is operatively interconnected with the blast head through a material transfer valve. The recovery chamber is further provided with a vacuum flapper valve adapted to selectively inhibit the flow of vacuum air through the chamber and slotted vacuum tube. During a first step the vacuum valve is open and the material transfer valve is closed.

Abstract: An arrangement for positioning selected compliant seals adjacent the inlet and outlet of a work piece treatment chamber. A plurality of variously dimensioned compliant seals corresponding to work pieces of differing sizes are retained on respective inlet and outlet seal carrier members which, in turn, are mounted adjacent the respective treatment chamber openings. Means are provided to permit the movement and indexing of the carrier members such that any one of the compliant seals may be positioned in operative relationship adjacent the treatment chamber. One such means includes circular carrier members mounting for rotational motion on a shaft. The compliant seals being spaced generally around the perimeter of the carrier member and being selectively positioned by the rotation of the member. Alternatively, a linear carrier member mounted for straight-line movement relative to the treatment chamber openings is contemplated.

Abstract: A conveyor apparatus for transporting elongated, flat electronic component assemblies or the like through a surface treatment chamber in a predetermined orientation. A continuous belt is provided with two parallel spaced rows of retention pins which are automatically separated in the loading zone to facilitate positioning of the assemblies on the conveyor. A wedge-shaped shoe member forces the respective pins transversely outwardly and is provided with an aperture permitting the insertion of the assemblies therethrough. Secure retention of the assemblies in the treatment chamber is assured by an inverted U-shaped channel which urges the retention pins into engagement with the component assemblies. The pins may be bent outwardly to enhance the compressive forces exerted by the pin pairs comprising the respective rows. A center-ribbed exit belt pulley deforms the belt along its longitudinal center axis thereby spreading the pin rows to aid removal of the assemblies following surface treatment.

Abstract: An improved method and apparatus for supplying a fluid coolant to a tool designed for drilling a hole in a workpiece, wherein a first coolant flow is supplied under pressure in a pulsating flow to the tip of the drill by a first pump with a second and booster coolant flow being supplied in a pulsating flow and under considerably greater pressure than the first flow. The second fluid flow is initiated in response to the build-up of back pressure to the first fluid flow to thereby flush away chips impacted on the drill causing such back pressure. The second fluid flow is terminated in response to the drop of back pressure to the first fluid flow.

Abstract: A centrifugal blasting wheel includes a pair of front and back wheel plates interconnected in spaced parallel relationship. Each wheel plate has a central opening defined by an annular surface of constant diameter. These plates are provided with respective cross-wise aligned grooves in their inner faces extending radially in equally circumferentially spaced relationship from the inner annular surfaces of the plates to the outer annular surfaces thereof and opening into each of the annular surfaces. A blade is removably mounted between each pair of aligned grooves. Each blade has a body generally in the form of a parallelepiped with an inner and an outer end and side flanges to define a blade of I-shape in transverse cross-section. Each blade has at least one retaining lug extending laterally from one of the side flanges and being substantially closer to the inner end of the blade body than the outer end thereof.

Abstract: A link and flight assembly for a blast chamber conveyor is disclosed. The assembly includes a flight having a first surface formed of blast resistant materials, such as manganese. The flight is T-shaped in cross-section and is connected to the link by a mounting arm secured to the portion of the flight which is not subjected to blasting. This permits the use of inexpensive materials to join the link to the flight bar.

Abstract: A blade for use in two different forms of centrifugal blasting wheels. The blade comprises a body generally in the form of a parallelepiped having an inner and an outer end and side flanges to define a blade which is I-shaped in transverse cross-section. The blade includes a first pair of laterally extending retaining lug formations which are adapted to engage the inner annular surfaces of the wheel plates of a first wheel thereby to retain the blade in place. Each of said first lug formations is arcuate and formed at a common radius with a pair of second retaining lug formations which extend from the side flanges of the blade in directions generally at a right angle to the direction the first lug formations extend from such side flanges. When the blade is used in a second wheel, the second lug formations engage abutment surfaces formed in recesses in the wheel plates thereby to retain the blade in place in the second form of blasting wheel.

Abstract: A portable apparatus for treatment of surfaces, preferably horizontal, comprising a centrifugal wheel for projecting abrasive particles onto the surface of an angle within the range of 30.degree. to 80.degree. with the surface, a feed hopper for supplying abrasive particles to the wheel, a rebound corridor extending angularly upwardly through an angle of at least 180.degree. with the surface and through which the abrasive particles rebound upon striking the surface whereby gravity means take over for returning the rebounding abrasive particles to the hopper.

Abstract: A portable apparatus for treatment of surfaces, preferably horizontal, comprising a centrifugal wheel for projecting abrasive particles onto the surface at an angle within the range of 30.degree. to 80.degree. with the surface, a feed hopper for supplying abrasive particles to the wheel, a rebound corridor of decreasing cross-section extending angularly upwardly and into which the abrasive particles rebound upon striking the surface and means for returning abrasive particles rebounding through the corridor to the hopper.

Abstract: A portable device for treatment of surfaces, preferably horizontal, comprising a centrifugal wheel for projecting abrasive particles onto the surface at an angle with the surface, a feed hopper for supplying abrasive particles to the wheel, a rebound corridor extending angularly upwardly and into which the abrasive particles rebound upon striking the surface, and means for inducing air flow into the blast area and through the rebound corridor for enhancing removal and recovery of abrasive particles.

Abstract: A multiple filter bag assembly wherein top access is had for removal and replacement of the filter bags through openings in the cell plate subdividing the filter housing into an upper clean gas plenum chamber and a lower baghouse, wherein use is made of tapered filter bags and a cage for easing the passage of the filter bags through the openings in the cell plate during installation and removal.

Abstract: A bladed centrifugal blasting wheel formed of a pair of spaced parallel wheel plates having a central opening through which blades are inserted into grooves extending radially from the central opening through the adjacent surfaces of the wheel plates, improvements including means for locking the blades between the wheel plates, impeller and control cage means for feeding particulate material onto the ends of the blades with centering means forming a part of the impeller for locating the elements in the central opening, resilient means adapted to be engaged by the blades upon insertion for holding the inserted blades during assembly, indicator means for showing the position of the control cage and means for providing air curtain to prevent accumulation of stray or rebound abrasive in the hub seal area during rotation of the bladed wheel.

Abstract: A system for the manufacture of synthetic hydrocarbon products from coal or similar carbonaceous solids is described. This coal liquefaction system includes means for reducing the pressure of high pressure and temperature liquid reaction product streams without attendant corrosion of the metal parts in the pressure reducing unit. The pressure reducing means comprises at least one elongated tube defining relatively narrow fluid flow passage, the reduction in pressure being effected substantially entirely by friction of the fluid within the tube.

Abstract: A portable blasting device in which the space between the blast head and the surface being treated is provided with a magnetic seal formed of the particulate material with apparatus for maintaining the magnet supports for relative movement to maintain the sealed spaced relation notwithstanding unevenness of the surface.

Abstract: Apparatus for transmission of sonic energy to the processing of work wherein the sonic energy is transmitted through a vibratory member to a fixture having spaced abutment surfaces in which the clearance between one abutment surface and the adjacent surface of the work piece, while the work piece is at rest on the other abutment surface, is equal to .+-.50% of the amplitude of the vibrations at the point of attachment of the fixture to the vibration generator.

Abstract: A guard housing and liner for bladed throwing wheels, in which the guard housing is in the form of a trapezoidal section dimensioned to enclose the bladed wheel and a cover which fits onto the upper end of the trapezoidal section for pivotal movement between open and closed position and for removal from said trapezoidal section, and a liner formed of a plurality of interfitting sections lining the interior walls of the guard housing.

Abstract: Recovery and feed system for abrasive blast in surface treatment comprising treatment and return by air to separate spent abrasive particles from dust and dirt and collecting the separated abrasive particles in a chamber, automatically withdrawing fresh abrasive particles from a storage bin when the recycle falls below a predetermined level in the chamber.

Abstract: A method is disclosed for recycling industrial air. Air contaminated by particulates is removed from the area of machinery, transported to dust collectors, and filtered. A small portion of the filtered air is discharged to the outside atmosphere while a substantial portion is recycled to the area of the machinery. Significant savings of energy are realized while less particulates are exhausted with the air into the atmosphere as contaminants.

Abstract: A jet pulse bag type collector which makes use of a venturi and a wire cage which extends internally substantially throughout the length of the filter bag, in which the wire cage is supported from the venturi and the filter bag is supported between the wire cage and a portion depending from about the opening through the tube sheet of the collector.

Abstract: Grate bars for the support of floor plates over which combustible material is advanced through a combustion furnace, in which the grate bars are in the form of elongate members arranged in side-by-side relation with alternate bars being movable endwise with means for vertical movement relative to adjacent stationary bars to define walking beams for advancement of the material through the furnace, in which the grate bars are formed of the three elongated rod-like members in triangular arrangement and interconnected by longitudinally spaced bulkheads which support the floor plates.