Abstract: A bolt-on mounting assembly for mounting a saw head having a base member and a generally vertical member extending from the base member to a tractor having first and second lift arms comprising a mounting lug, structure for securing the mounting lug to the saw head, structure for receiving the first lift arm of said tractor, and structure for securing the first lift arm to said structure for receiving the first lift arm.

Abstract: An air intake assembly for a combustion oil burner, the assembly comprises a housing having a front wall, a back wall and a peripheral side wall between the front wall and the back wall, the housing defining an air intake chamber therein, the front wall having a partly circular air intake hole therein, an axle mounted to the housing between the front and the back walls, first, second and third rotatable vanes rotatably mounted to the axle and positioned adjacent to the air intake hole, the first rotatable vane is fixedly attached to the axle, and a mechanism mounted on the rotatable vanes for sequentially rotating the rotatable vanes whereby the air intake hole can be selectively opened from 0.degree. open where substantially no air can pass through the hole and into the air intake chamber, to approximately 270.degree. open where air can flow into the chamber.

Abstract: A power feed device for use with a hand held sewer and drain cleaning machine having an elongate, coiled cable and a rotating means for rotating the cable, the power feed device comprising two rollers rotatably mounted on housings, the housings being rotatably mounted within a body of the device, biasing means for biasing one of the housings and thereby one of the rollers toward the cable, cable centering means for centering the cable between the two rollers, means for rotating the roller housings from a "NEUTRAL" position wherein the axes of rotation of the rollers are parallel to the axis of rotation of the cable such that when the cable is rotated in the first rotational direction the cable is not moved along its elongate axis relative to the rollers, to a "FORWARD" position wherein the axes of rotation of the rollers are skewed to the axis of rotation of the cable and such that when the cable is rotated in the first rotational direction the cable moves along its elongate axis in a first direction, or to a

Abstract: The coupling device for coupling a cable of a sewer and drain cleaning machine to a cutting tool comprises a housing, a cable connecting mechanism for connecting the cable to the housing, a cutting tool connecting mechanism for rotatably connecting the cutting tool to the housing, and a breakable drive mechanism for driving the cutting tool when the cable and the housing are rotated and breaking when a predetermined amount of torque is applied between the housing and the cutting tool, the predetermined amount of torque being less than the amount of torque needed to break the cable.

Abstract: A drain line cleaning apparatus is disclosed which includes a spin head, capable of high speed rotation. The spin head is attached to a spinner cap which carries a bit and one or more blade members which cut through roots and other residue deposited in drains. The spin head is powered by water jetted to notches formed on an inner surface of the spin head. The jetted water is also deflected by the notches to create thrust to force the drain line cleaning apparatus through the drain line.

Abstract: The fluid pump has a casing defining an inlet manifold, an outlet manifold and a plurality of piston chambers between the inlet manifold and the outlet manifold, each piston chamber having a piston therein for drawing fluid into the piston chamber from the inlet manifold and for pumping fluid out of the piston chamber into the outlet manifold, and a spring biased check valve associated with each piston chamber wherein a spring biases each valve toward the piston chamber and seals the piston chamber from the outlet manifold, the improvement comprises: at least one of the check valves having a hole therethrough which provides open communication between the outlet manifold and the piston chamber, blocking and sealing structure associated with the check valve for blocking and sealing the opening, and a mechanism for moving the blocking and sealing structure between a first position wherein the hole is blocked and sealed and a second position whereby the hole is not blocked or sealed, such that when the blocking a

Abstract: As in the parent application, a freshly mixed quick-setting sand mix is blown from a blow box into a mold while a plunger moves through the blow box to chase all of the fluidized sand into the mold. Here, the blow box sand cavity is formed by a tube extending downward but leaving an annular gap above the blow plate. The fluidizing air tends to move bottom sand directly through the center exit in the blow plate. With quick setting sand, any residue is blown into a purge pan while the plunger is advanced. With sand that is not quick setting, and without the plunger, nearly all residual sand settles and tends to be the first blown into the mold during the succeeding blow.

Abstract: The gap between the bowl cone and the gyrating cone of a cone crusher, though adjustable by hydraulically lifting the bowl, is safely fixed during crushing by shims for vertical firmness and by a ring of wedge segments binding the side of the bowl. Both are held firm by spring washers, with no need to maintain a hydraulic pressure. For adjustment hydraulic jacks of one set release both shims and wedge, with the correct sequencing for removal of shims. A floater ring is normally pressed by one set of spring washers for clamping the shims. When it is pressed down hydraulically it first releases the shims, but further movement under influence of a small pump presses down the wedge segments, overcoming the spring washers which normally press the wedge segments for wedging. The shims are double shim plates some of which have slots that prevent removal of the right hand end until the left end has been swung free, and the others of which are just the opposite.

Abstract: In foundry core-blowing, a blow box snugly fits a plunger which moves through it during the blowing step. In effect, the plunger pushes all of the fluidized sand mix out of the blow box and into the core box. This solves problems which have long impeded the use of quick setting sand mixes in blowing of cores and the like. With more conventional sand mixes better and more uniform packing of the sand in the mold is believed to be achieved. Two measuring feeders are provided supplying two different sand mixes which are non curing when separate but fast setting when mixed. They are mixed in a rapid mixer, dumped into a charging tube which quickly dumps the mix into a blow box. The plunger moves through the charging tube and then through the blow box, cleaning both and aiding in the blowing of all of the sand mix into the mold or the blow tube leading to it. The tip of the blow tube has an internal lip which breaks off any residue or plug retained within this tube.

Abstract: For progressively breaking-in-place concrete of roadways or the like, a vertically extending diesel power driver, of a type used as a pile driver, but with a concrete-breaking shoe forming its lower end, is advanced by a towed chassis. Guide angles at the upper portion of the power driver, cooperating with a guide bar vertically disposed, guide the power driver in its conventional rythmic bobbing, with sufficient looseness to permit the power driver to have a pendulum like swinging action. This swinging action results from relatively intermittent movement of the bottom portion of the power driver while the top portion is advanced more steadily by the chassis. Shoe-towing means extend forwardly from the shoe to a hanging link which is resiliently biased forwardly to tow the shoe. The biasing is provided by long-throw cushions. The forwardly extending shoe-towing means is flexible, to prevent damage when the shoe is driven deeply.

Abstract: The use of a lift fork for a boom swinging vertically over 240.degree. is made feasible by hanging the lift fork with freedom to pivot as gravity dictates when the angularity of the boom is changed, with a brake by which the angularity between boom and lift fork can be locked. The brake enables the boom to exert a strong forward thrust on the bottom of the lift fork when this is necessary for thrusting its tines under a load, and has other advantages. Proper positioning of the load on the forks will cause the forks to hang with the tines of the forks nearly level, or slightly tilted back if preferred. Prefably the fork-lift device also hangs conveniently close to this position when empty. Material handling programs which heretofore needed not only a crane operator but a crew for attaching the hoist line to the load and removing it, can be performed by the operator alone if the swinging but lockable lift fork is used with a three-part "reach anywhere" articulated boom on a swinging crane.

Abstract: Control apparatus and a method for making battery paste by mixing selected quantities of lead oxide, sulfuric acid and water to form a reaction mixture are disclosed. During the reaction portion of the process, the viscosity of the mixture initially descends on a time-viscosity curve, which then changes in slope to reach a point of minimum viscosity. The temperatures of the reaction mixture form a time-temperature curve having a temperature peak therein. The temperature and the viscosity of the reaction mixture are determined respectively by temperature sensing devices and by viscosity sensing devices.

Abstract: Mixing equipment includes a mixing compartment and at least one mulling assembly for dispersing therein material, including granular material, such as foundry sand. An agitator is provided for improving the mulling and aerating of the dispersed material within the compartment. The agitator includes a rotor rotated about an upright axis disposed within a cavity opening into the mixing compartment. The rotor includes a hub disposed within the cavity and having a plurality of fingers extending outwardly therefrom. Upon rotation of the rotor, the fingers move forcibly out of the cavity and into the mixing compartment to impact the material moving therepast, for mixing and aerating the material. An overflow discharge opening in a side wall of the compartment permits the prepared material to be discharged continuously from the mixing compartment. The supply of material to the compartment and the discharge of material are under the control of door, material consistency sensing, and timing apparatus.

Abstract: The drum of a winch suitable for cranes is driven by gearing compactly arranged within the drum, leaving room also for a free fall dog clutch when desired. The gearing is of the compound planetary type which can provide very high ratios with low friction. The low friction yields greater efficiency, and permits retaining the gearing in operation idly during free fall, ready for fail-safe braking using it. A separate brake is provided for stopping free fall, when free fall is provided. The winch motor is preferably of the two unit type, with valving for two speeds. Operation of either manual valve (normal operation or free fall) from its neutral position neutralizes the other. Numerous automatic valves are included in a valving block, providing simplicity of piping.

Abstract: Leading edges of rotor-plates which carry the swing hammers of hammermills are protected from wear by removable caps, each secured by paired pin assemblies, each of which may be shifted axially to permit removal of the cap it normally secures. Each pin assembly includes a pair of tubular pins or pin portions which may be axially abutting one another, each assembly including at least one portion which is short enough to be removed (or moved axially to a position which permits removal of the cap). In the original form of the parent application, each assembly was totally countersunk within the cap, having heads at each end that were countersunk and having in each head the countersunk head or nut of a tie-bolt. In the form preferred at the time of filing this continuation-in-part application, the pair of tubular pivots forming each assembly is held in place by reliable friction resulting from the expanding force of split-spring-tubes forcefully squeezed substantially closed during insertion.

Abstract: The invention relates to cranes or the like in which two hoist lines control a clamshell bucket. If the winch for one line is operated to draw in this line, it closes the clamshell bucket and hoists it. During this hoisting, the winch for the other line must also be operated to pull in the slack. If this other line is reeled in excessively, it will dump the bucket. A system is provided for automatic control of the winch being used for slack-takeup, thus avoiding the need for great care and delicate finesse by an experienced hand on a second control lever. The system puts the slack-takeup winch in hydraulic series or tandem with the discharge from the hoisting winch, but limits the hydraulic pressure supplied to the slack-takeup winch so that it is barely enough to accomplish the takeup of its line, and cannot cause dumping.

Abstract: Optimum concentration of the acid-scrubbing solution employed in a scrubbing tower for removal of malodorous and/or toxic gases from the air is maintained automatically in a control system which senses the electrical conductivity of the solution to control acid-feeding apparatus. High and low concentration alarms are also provided to warn of malfunction.

Abstract: A tank for oil or other hydraulic fluid is kept under a few pounds of air pressure during operation to keep air from being drawn into the fluid and to aid its flow to the pump. The pressure is provided dependably and quickly by a small air pump driven whenever the hydraulic pump is driven. A bleed-off discharge causes prompt dissipation of the pressure on shutdown so as not to cause oil leakage while the associated hydraulic pump is idle. The hydraulic level is below the pump shaft level so there will be no leakage by gravity.

Abstract: A level control system involving both an apparatus and a method for a rotary feed hopper of the inverted, open-ended, truncated cone-type, wherein heavy paste-like viscous material which is fed into the large open upper end of the feed hopper is delivered or discharged through the small lower end of the hopper. A load meter in connected relation with the motor which drives the hopper senses the power required to drive the hopper and thus indirectly indicates the quantity of the material in the hopper, and consequently, the height or level of the material. When the load on the motor reaches a predetermined maximum the feed of material to the hopper is discontinued thus preventing overflow. When the load on the motor reaches a predetermined minimum the feed of material into the hopper is resumed.

Abstract: A bearing housing for a heavy rotor is made axially-nonsymmetrical so that the bearing chamber therein is shifted axially of the rotor shaft upon reversing the bearing housing. With a new rotor, the nonsymmetry positions the bearing chamber axially outwardly from the housing center. When necessary, the rotor shaft, by virtue of having successively increased diameters inwardly from its end, can be reworked by turning new surfaces thereon positioned axially inwardly from the original surfaces. The bearing housing is then reversed so that its nonsymmetry locates the bearing chamber inwardly from the housing center, to accommodate the new positions of the shaft surfaces.