Abstract: A reamer and stabilizer assembly for rock drills having a substantially cylindrical body provided with a threaded end socket for connection to a drill stem, the body having circumferentially spaced longitudinally extending recesses for receiving reaming and stabilizer rollers mounted on axles extending parallel to the axis of the body, each reamer and roller assembly being removably retained in its recess by a keeper pin which can be inserted or retracted through a keeper pin passage opening into the threaded socket and into a longitudinal passage through each axle.

Abstract: Game apparatus for a game which has a board representing a battlefield divided into a plurality of spaces to receive game pieces. The spaces are in a rectangular grid having a first pair of oppositely disposed margins having adjacent spaces representing trenches, and a second pair of oppositely disposed margins having adjacent spaces representing gun positions. Gun pieces located in the gun positions are oriented before firing so that their range is unknown to the opponent and pairs of guns can be interchanged before the guns have been fired, which is a realistic representation of a battlefield situation. Some spaces on the board are designated as being within range of a particular type of gun and tank pieces moving along the board from one trench towards the other trench are subjected to gun fire from an opponent's guns, if he so desires, when positioned on a particular space within range of a particular gun.

Abstract: An auxiliary trailer for towing behind a tractor and main trailer combination adapted to carry an elongated self supporting load. A forward end of the load is carried on a bunk on the tractor, and the bunk that normally supports the aft end of the load is removed and fitted on a turntable of the auxiliary trailer. A lower portion of the turntable fitted on the main trailer receives a complementary forward portion of the auxiliary trailer and the load now extends between bunks fitted on the tractor and the auxiliary trailer, the main trailer serving merely to support a forward end of the auxiliary trailer and to transmit turning forces to the auxiliary trailer. In this manner, the number of load bearing axles and spacing between the axles is increased, thus increasing capacity of the vehicle. Normal onboard load measuring gear is adaptable to indicate vehicle load. Equivalent structure for coupling the auxiliary trailer to the main trailer can be substituted for the turntables.

Abstract: A grapple attachment for the boom of a hoisting machine having a pair of arms movable between open and closed positions, the arms supporting an endless chain which, when the arms are closed, embrace a pole to be placed so that the pole can be lifted and then rotated about its own axis by a drive motor engaging the chain so that the fittings and the like attached to the pole can be aligned in a selected direction while the pole is held by the grapple.

Abstract: An eavestrough bracket formed of a length of stamped sheet metal which has a straight bar portion having an upwardly curved hooked portion at an outer end for engaging an upper hooked marginal edge of an eavestrough and an upstanding leg at an inner end for engaging an opposite upper marginal edge portion of the eavestrough, the leg having an opening for receiving a securing nail, a strengthening rib extending continuously from substantially centrally of the bar portion and upwards through the hooked portion and a trough extending continuously from substantially centrally of the bar portion and upwardly through the upstanding leg and terminating at the hole for guiding a nail to be driven to the opening.

Abstract: Conversion kit for converting a snow vehicle into a wheeled vehicle in which the snow vehicle has a transverse beam adjacent the front of the vehicle body. Skis on ski pivots adjacent the front and a powered track assembly adjacent the rear of the vehicle are removed from the snow vehicle and the kit substituted. The kit includes a front axle assembly for mounting a pair of steerable front wheels, and a rear axle assembly adapted to be powered for mounting a pair of rear wheels. The kit also includes front axle mounting structure adapted to be secured to the transverse beam and to mount the front axle assembly on the body, which structure includes at least one axle bracket having a pair of flanges. The flanges straddle the front axle assembly to receive an axle attaching bolt passing through the flanges and the front axle assembly to secure the front axle assembly to the axle bracket.

Abstract: Lubricating assembly for gas line ball valves in which a pressure vessel adapted to be filled with a lubricating fluid mounted above the ball valve, the pressure vessel having a descending discharge conduit ported into the valve body between spaced annular seals between which a ball valve element seats so that gas escaping from the ball valve flows into the pressurized vessel and lubricating oil flows by gravity through the conduit into the valve body.

Abstract: A plumbing test fitting for waste or vent pipes and stacks extending between adjacent floors of a building having a closure plate adapted to be slidably fitted between a pair of spaced adjacent ends of a pair of pipes, the joint being sealed by a detachable sealing clamp which also sealably bears against the periphery of the closure plate. A sliding valve element having an operating stem which extends outwards between the pipes and through the sealing clamp can be operated to open or close a passage in the closure plate so as to enable the pipe to be closed for testing and thereafter opened to permit testing fluid to escape down the pipes.

Abstract: Reverse osmosis, particularly for water desalination, is achieved using semipermeable membranes which selectively permeate purified water from a feed solution pressurized by reciprocating piston or diaphragm pump. Pump action is assisted by returning pressurized concentrate fluid acting on reverse side of the pump piston or diaphragm. Directional valves controlling alternating admission and venting of concentrate fluid to and from pump cylinder are actuated mechanically by reversal of force applied to the piston rod. Mechanical dwell is provided in the piston or diaphragm motion during directional valve actuation. Pump may be operated by a manual lever or by a crank mechanism on a low speed rotary shaft. An optional differential surge absorber provides continuity of feed solution circulation past membrane surfaces during the return pump stroke, thus minimizing detrimental salt concentration build-up on the membranes.

Abstract: A control assembly for a dental apparatus wherein delivery of operating air, coolant air and coolant water to the dental hand piece is controlled through the operation of normally spring closed pilot valves which are operated to the open position by application of pilot air, delivery of which from the source of pressurized air is controlled by a foot operated valve so as to ensure delivery of coolant air or coolant water when needed when operating air is being delivered to the hand piece.

Abstract: Loading apparatus having vehicle body, inclined conveyor assembly extending upwardly and rearwardly from front of vehicle body, and hopper adjacent front of vehicle to direct material onto conveyor. Apparatus has extendable excavating assembly including a guide mounting a carrier which carries a hoeing assembly. The guide is mounted on vehicle body, and the carrier means cooperates with the guide for movement parallel to movement of conveyor when viewed from above. The hoeing assembly is carried on carrier means to be generally adjacent the hopper to draw material onto hopper for feeding onto conveyor. Carrier and guide can be carriage mounted on rails, or telescoping ram arrangement to provide extendable mount for hoeing assembly which increases reach thereof without requiring excessively long arms, and also facilitates operation of hoeing assembly for drawing material onto the hopper. Operator is positioned at front of vehicle for good visibility during operation of hoeing assembly.

Abstract: A purse seine hairpin retainer and purse ring handling method which simplifies and lessens the danger involved in collecting and securing the purse rings that are attached to the base of a fish net used in a seining operation for catching fish. The purse rings are threaded by a purse line which is hauled in toward the boat thereby gathering the purse rings together in a closely grouped arrangement and closing the bottom of the net. The purse rings are then threaded onto the lower leg of a hairpin member which is generally hauled up and temporarily suspended over the deck of the boat while upper end of the net is hauled in and the fish removed therefrom.

Abstract: A device for fastening a pair of structural pieces in face to face relationship which has a pair of conical socket members adapted to be secured to each of the pieces and opening out of respective faces thereof for rotatably accepting opposite end portions of a dowel which has a pair of diametrically opposed longitudinally extending flat portions terminating in abutement faces which are engaged by free ends of a spring leaf detent outer ends of which are secured to the socket members near the open ends thereof, the dowel having a notched central flange which can be gripped by a tool extended between the pieces for rotating the dowel so as to move the abutment faces out of and into registration with the detents.

Abstract: Air cooled brake disc having first and second disc-shaped face portions with each face portion having an outer braking surface and an inner surface. A plurality of radially disposed webs extend between the face portions from an inlet adjacent an inner portion of the disc to an outer portion of the disc, the webs defining with inner surfaces of the face portions radially extending cooling passages within the disc. A plurality of radially disposed cooling fins extend from opposite inner surfaces of each passage. Sums of cross sectional areas of inner and outer cooling passage portions defined in part by the cooling fins are generally equal to reduce air flow velocity variations within the cooling passages. In one embodiment, a clearance space extends between opposed edges of the fins adjacent a central diametrical plane of the disc.

Abstract: Reversible puller for quickly pulling drill rods from, or for re-inserting drill rods into, drill hole. Rock drill has drill head mounted on feed carriage, drill head including rod rotating structure for rotating drill rod when in drilling mode. Rod puller includes drive wheel and idler wheel mounted for rotation with peripheries adapted for engagement with drill rod. Drive wheel is coaxial with, and rotates with, rod rotating structure and idler wheel cooperates with drill head for movement relative to drive wheel to permit idler wheel to be positioned so as to be essentially coplanar with drive wheel with wheel axes parallel. Drill head is swivellably mounted on carriage to permit drill head to be positioned in rod pulling mode wherein wheel axes are disposed generally normally to drill rod axis and periphery of drive wheel is spaced closely adjacent drill rod. Idler wheel is moved so that drill rod is squeezed between idler and drive wheels for moving rod in desired direction.

Abstract: Fluid propulsive device for accelerating flow of fluid passing through the device, for pumping fluid, or solids carried in fluid, or for propelling the device through fluid. The device has a main body having a duct provided with primary and secondary jet means adapted to receive working fluid under pressure. The jet means extend peripherally around the duct generally within planes normal to duct central axis and direct conical sprays of working fluid downstream into the duct. Primary jet means sprays working fluid initially at a conical semi-angle of between 18.degree. and 30.degree. so as to converge inwards initially towards a theoretical apex of the cone of the spray adjacent the duct central axis. Secondary jet means disposed downstream of the primary jet means within plane containing theoretical apex sprays fluid initially at angle of between 6.degree. and 10.degree. to duct side wall.

Abstract: A waferizer having a rotatable cylindrical head from which a plurality of waferizing knives project for slicing wood stock, and rollers mounted on the head which have a plurality of longitudinally extending radially projecting blades for incising the face of the wood stock to a depth equal to the depth of cut of the knives so as to produce wafers of uniform width.

Abstract: A saw guide for use between a pair of circular saw blades fixed on an arbor which has a holder having an annular head in which the guide pad having parallel opposed guide faces has a loose axially movable and tiltable fit and which is stabilized in an aligned position relative to the saw blades by means of a pair of spaced apart lip seals mounted on the guide pad and bearing against the annular head, the pressure of the annular seals being increased by delivery of air between the lip seals, said air also passing through passages ported out of the faces of the guide pad.