Abstract: This expansion valve (10 ) can be used for a refrigeration system (1) having a compressor (2), an evaporator (3) and a condenser (4). The valve (10) comprises a body (12) including an inlet passage (26), an outlet passage (38), a piston passage (28) defining a piston port (30) and valve chamber (32), the piston passage (28) defining a piston chamber (46) communicating with valve chamber (32). A piston (40) is movably mounted in the piston passage (28) and selectively controls flow through the piston port (30), the piston (40) having an interior passage (60) communicating with the inlet passage (26) and having a pin port (62) communicating with the valve chamber (32), the piston (40) having a biasing spring (52) biasing the piston (40) into a closed position. A valve pin (70) is movably mounted in the valve chamber (32) and controls flow through the valve pin port (62), the valve pin (70) having a spring (74) biasing the pin (70) into the closed position.

Abstract: This mine roof tool bit insert, formed from a flat elongated body, provides opposed side faces, opposed end faces, a bottom face, opposed top faces and opposed intermediate faces disposed between associated top faces and end faces, the body forming identical halves rotating about a central axis. Each half includes a top cutting edge an intermediate cutting edge and end cutting edge. The top face, intermediate face and end face are planar and are rearwardly inclined to provide a constant relief angle. The intermediate cutting edge is inclined relative to a plane normal of the axis of rotation at an angle greater than that of the top cutting edge. The method of drilling a hole in a mine roof using a bit insert of this character includes positioning the insert, rotating the insert at about 200 to 1000 rpm and applying a thrust of about 1000 to 8000 lbs. to the insert.

Abstract: This apparatus (10) for reducing lumps of coal, and the like, on a grid (14) disposed over a material-receiving area (16) includes a carriage (12) guided across the grid (14) on a track (44) by a drive system (50) and having roll assemblies (60) mounted thereto. Each roll assembly (60) includes a drive roll (62) having stationary shaft assemblies (66,68) mounted to the carriage (12) and driven by an internally mounted motor (78), and a set of pick rings (64) mounted to the drive roll (62) at longitudinally spaced intervals and having pick circles with picks (90) pointing in both directions. The material-receiving area includes a conveyor system which, when the area is wide, includes a longitudinal conveyor (100) flanked by a plurality of lateral feeder conveyors (102).

Abstract: This thermostatic expansion valve (12) includes inlet and outlet fittings (22 and 24) connected to a valve body (30) having a diaphragm assembly (40) at one end. A replaceable cartridge (50) is disposed in the valve body (30) below the diaphragm assembly (40) having a passage (58) communicating with the inlet (22) and an end opening of predetermined size to define a valve port (60). A pin (72) is disposed below the valve port (60) and connected to the diaphragm assembly (40) by a pair of pushrods (76) so that the pin assembly (70) responds to modulation of the diaphragm assembly. A spring assembly (80) engages the pin assembly (70) tending to urge said assembly into a closed position.

Abstract: This inlet strainer (160) is for a thermostatic expansion valve (100) having an inlet fitting (114). The inlet fitting 114 includes an elongate passage (152), with an inlet opening at one end and a strainer-receiving opening at the other end, and a transverse passage (156) communicating with the elongate passage (152) between said ends. The strainer assembly (160) includes a closed outer end (162) threadedly connected to the fitting (114), a strainer tube (164) extending into the elongate passage (152) to a point beyond the transverse passage (156) and a closure ring (166) received in sliding relation within the passage (152) so that dirt is removed from the refrigerant before entering the valve port.

Abstract: Nitrogen compounds are a source of soil acidity. In addition nitrates are a major factor in the leaching of other nutrient salts from soils. These salts are then replaced by the available hydrogen ions, rendering the soil even more acidic. Besides supplying nutrients, a desirable fertilizer should offset changes in soil acidity brought about by nitrification. Calcium carbonate accomplishes this. Unfortunately it has not been possible commercially to include calcium carbonate in a fertilizer. If CaCO.sub.3 particles are ground too large they do not dissolve along with the agricultural fertilizer nutrients. If CaO.sub.3 is pulverized to a state necessary for dissolution, because of its hygroscopic properties, it hardens or cakes. It is not sufficiently stable in admixture with the other fertilizer materials for commercial distribution. Herein a fertilizer is provided which improves the condition of the soil, and stimulates microbial activity in the soil.

Abstract: This bracket assembly (10) is for attachment to wall partitions (12) having slotted members (14). The bracket assembly includes a base (30) adapted to carry a task light L or the like, a connecting bracket (32) having spaced tangs (60 and 62) received by selected vertically spaced slots (22) for connection of the bracket to the vertical member (14) and a fastener (34) for adjustably connecting the base (30) to the bracket (32). A modified construction provides brackets (34) attached to a pair of spaced vertical members (14) to connect modified bases (130) supporting a track assembly (100) between the vertical members (14) the track assembly including a track member (102) and a mounting member (104) movably mounted to the track member and adapted to carry a task light L, or the like.

Abstract: This lacing assembly is for use with an article of footwear (10) and includes lower and upper vamp sections (26 and 30) connected by a single continuous lace (36). The lower vamp section (26) includes opposed vamp portions (28) having lace-receiving eyelets (42) including opposed upper end locking eyelets (44). The upper vamp section (30) includes opposed vamp portions (32) having lace receiving eyelets (46) including opposed lower end locking eyelets (48). The locking eyelets (44 and 48) include a locking member (50) having an eyelet opening (54) and a communicating slit (60) which receives the lace (36) in locked relation. The locking eyelets (44 and 48) permit the fit of the lower vamp section (26) to be adjusted selectively and independently of the upper vamp section (30).

Abstract: This mounting assembly (10) for a loudspeaker (30), or similar fixture, includes an enclosure (12) for mounting the loudspeaker (30) to a ceiling (C) or the like. The enclosure (12) includes a wall attached portion (16) having an interior annular flange (20) and an exterior annular flange (22) connected by a peripheral sidewall (24). The loudspeaker flange (32) is attached to the interior flange (20) by removable fasteners (36) and the enclosure is attached to the ceiling by fasteners (40). A baffle (60) is removably attached to the enclosure exterior flange (22) by fixed fasteners (62). The enclosure (12), in one embodiment, includes a fixedly attached closed portion (14) and the enclosure portions are attached to a ceiling (C) by swivel clamping members (50).