Abstract: Produce air flow longitudinally through circular inlet passage toward frusto-conical chamber which expands to a cylindrical chamber. Produce air flow tangentially of cylindrical chamber, as by blower, to produce spiral flow therein and in a larger, coaxial annular chamber with a central restrictor having a projection extending into cylindrical chamber. Material fed into inlet passage, as through hopper or at open inlet end, which may be bell shaped. Comminuted material discharged from annular chamber through tangential duct, in which air flow is produced by another blower. Still another blower may discharge at acute angle longitudinally of inlet passage. Restrictor may be hemispherical or conical and also adjustable forwardly or rearwardly. Projection of restrictor may be cylindrical or cylindrical with rounded front end and also adjustable forwardly or rearwardly.

Abstract: A tank having a hinged top and sealing means is provided with a series of heaters mounted on the inside of the front, rear and side walls and also the bottom of the tank. A rack containing fiberboards placed in upright, spaced position is set on the bottom heaters and a solution of solvent and asphalt or the like is pumped into the tank, then removed. The top of the tank is sealed and a heating medium is pumped through the heaters, while a vacuum pump is started to produce a vacuum inside the tank and suction exerted for evaporating solvent. One or two condensers, between the tank and the vacuum pump, condense the solvent vapors for collection and reuse. With one condenser, an excess condensate tank is connected to the lower condensate section of the condenser. A valved pipe connecting with the pipe between a lower condensate section of the condenser and the vacuum pump is utilized to bleed air into the tank after treatment and may be used to control the initial vacuum applied.

Abstract: A neutral safety switch is moved to a closed position upon shifting of an automatic transmission to a neutral position but moved to an open position when the automatic transmission is shifted to a drive position. An air pressure responsive switch is moved to a closed position when air brake pressure is reduced to set alternative brakes and is in series with a bell, buzzer, light or other signal producing device. A control device is controlled by the neutral safety switch, so as to close one circuit, whereby an ignition control may be utilized to start the engine with the transmission in neutral position, but to close an alternative circuit, whereby the signal device will be activated with the alternative brakes set, when the neutral safety switch is moved to open position.

Abstract: The tiedown strap is formed of neoprene or other suitable resilient material and has a rear extension having a slot for detachably engaging the rowel, a front loop stretchable onto the front of the boot heel and side extensions having holes for detachably engaging a button on the corresponding side of the spur. The instep strap is formed of similar material and has an enlargement at each end for detachable engagement with the spur buttons. When the instep strap and tiedown strap are used together, the side buttons of the spur may be pivotal between upper and lower positions.

Abstract: A tool for installing scarifier teeth in a hole in a socket attached to a drum, as by using an identical pin and air hammer as can be used for removing the teeth through an aperture at the rear of the socket. The tool has a circular hole with an inner bevel at an angle of not less than 321/2.degree. but preferably 35.degree. to the center line of the hole, while this bevel engages an outer bevel of a body of the tooth adjacent a shoulder to which weld metal attaches a tip of relatively hard metal to the body, or a flare or skirt of the body adjacent a stem of the tooth. The aforesaid holes in the body may be of different length and different diameter, depending on the distance from the point of the tip to the bevel or the flare or skirt. The opposite end of the tool is provided with a hole to receive a pin which may be impacted by an air hammer, while a shim may wedge the pin in this hole to prevent the tool from flying off the pin if the air hammer is accidentally triggered.

Abstract: One or both of a pair of oppositely rotating bodies, such as motor driven flywheels, are mounted for pivotal movement against the side of a ram. One or more tension rods connect pivot shafts or members for equalizing precession and similar forces of rotating bodies, rather than housing. Pulsed solenoids produce force increased by force multiplying device, such as pivoted links or cable arrangement, which has greatest mechanical advantage when solenoid pull is weakest at start, but decreases as solenoid pull increases. Ram has entrance taper on one or both sides. Ram is returned by nylon sheathed bundle of elastomer cords which are looped around ram from both sides and stretch proportionally along their length. Removable guide rods engage holes in side wings of ram. Safety device is actuated by rod, moved through engagement with work piece, for closing safety switch in solenoid circuit. Alternatively, a block engages a ram wing to prevent impact stroke, but is removed by a similar rod.

Abstract: A series of tubes wound in spiral, spaced relation in pressure contact with the next inner tube or a central cylinder to form, between them, a spiral path for one liquid flowing upwardly in the space between the tubes, while another liquid flows downwardly in the tubes. The outermost tube may be enclosed by a sheath in pressure contact therewith, while several sets of tubes, separated by corresponding sheaths, may be utilized. The diameter of the tubes may be varied for the sets to compensate for the greater length of tubes at an outer position, so that an approximately equal time of travel from one end of the tubes to the opposite ends may be obtained. The spacing between the successive turns of the coils is preferably a distance corresponding to one half the diameter of the tubes.

Abstract: A series of adjoining cam discs are mounted on a foot having an inclined surface, with the cams surrounding a stem connecting the foot and a head of a diameter to fit within a borehole in rock. The stem extends axially between the head and the foot, while the inclined surface is spaced from the head and is inclined with respect to the axis of the anchor. The head has threads for receiving corresponding threads on a bolt which extends through the foot and stem, while the flat cam discs have a width less than, and a length greater than, the diameter of the borehole. The anchor is moved into the borehole and the cam discs are caused to engage the wall of the borehole, the bolt then being turned to thread the head against the cam discs and force the ends of the cam discs against or into the wall.

Abstract: A harvesting apparatus adapted to move through a field of vegetation having a liquid component and a fiber component to mow and gather the vegetation and a processing means to grind the vegetation to a pulp as it is received, extract and collect the liquid component thereof, and condition and discharge the fiber therefrom.

Abstract: Fresh, outside air may be supplied to a first space, such as a dining area of a restaurant or the like, while air from the first space may be recirculated through an air conditioning unit for cooling or heating the air, which is returned to the first space. Also, air from the first space is transferred to a second space, such as a cooking room of a restaurant or the like, which contains heat producing cooking equipment, the latter resulting in the second space having additional cooling requirements. Such transfer air is passed through a chilling device, in which the air contacts water, as through sprays or a water bath, to cool the water to a temperature close to the dew point of the air, and also to correspondingly cool the air furnished to the second space. When cooling of air to the first space is required, either the recirculated air, but preferably the fresh air, is cooled by the chilled water produced by the chilling device.

Abstract: A separator for material which includes components of different specific gravities and sizes, includes a series of spaced, parallel shafts disposed in essentially the same plane, which may be tilted upwardly. A series of non-circular discs, such as elliptical, three lobed, etc., are mounted on each shaft and interspaced with the discs on adjacent shafts. A pipe, on which the discs are mounted, or a spacer mounted on the shaft provides circular surfaces between the discs which clear the projections of the discs of adjacent shafts but when the disc surfaces between the projections come opposite the pipe or spacer, cause holes or spaces to be produced, through which material may fall, if sufficiently small. As the discs rotate, they not only cause the holes to open and close, but also propel the material both upwardly and forwardly. The discs may be mounted on a shaft in a spiral relation, so that not only is the material pushed upwardly and forwardly, but also laterally.

Abstract: A variable follower rest for a lathe for supporting tapered shafts and similar shafts of varying diameter as they are being turned. The follower rest includes a bearing arm above and another bearing diametrically opposite to the cutting tool to resist the lift and thrust of the cutting tool against the shaft. Through master-slave actuators the bearing arms move towards and away from the center of the shaft in unison with corresponding movements of the cutting tool to always engage the shaft as the diameter of the shaft varies.

Abstract: Fresh air is introduced into the exhaust pipe leading to the muffler for an internal combustion engine, while the air and exhaust gas mixture is cooled, not only in the muffler but also in a circuitous tube which extends from the muffler to the normal discharge or tail pipe and in which a special cooler may be installed. From the outlet of the special cooling tube, which faces forwardly, a portion of the air and exhaust gas mixture, now cooled, is led from a Y-connection to the intake tube of the air filter, so that the air and exhaust gas mixture will be introduced into the intake system prior to the carburetor. A rearwardly slanting arm of the Y-connection connects the front end of the special cooling pipe with the normal tail pipe.

Abstract: This invention relates to an electric impact tool characterized by a pair of electric motor-driven counterrotating flywheels, at least one of which is movable relative to the other from a retracted inoperative position into an extended operative one closely adjacent the other flywheel whereby a ram is squeezed therebetween and impelled forward at high speed against a workpiece. The nosepiece of the tool frame is retractable although normally extended due to the spring bias urging it and the movable flywheel to which it is mechanically linked into disengaged position. These elements cooperate with one another and with a manually-actuated trigger such that the latter must be depressed and the nosepiece retracted in order to engage the high energy friction clutch defined by the flywheels so as to operate the ram. A flywheel speed control is provided for matching the ram impact to the workload.