Abstract: A method wherein an article is molded of a heat-fusing material or plastisol, either liquid or dry, in a mold having an array of gas impingement jets disposed adjacent the backside of a mold surface for controlling the temperature over respective first and second areas of the mold surface. There is included first and second gas heating and cooling circuits each including a blower and dampers for supplying gas at the gas impingement jets associated with the mold. All of the gas impingement jets are supplied with heated gas to preheat the mold surface to a non-gelling temperature and a liquid plastisol coating is applied to the mold surface. To obtain the coating, the mold is filled and the excess plastisol is removed from the mold by dumping the plastisol from the mold into a dump tank.

Abstract: A molding machine has a valve assembly that includes means for selectively heating or cooling a mold by controlling flow of gas through an array of gas impingement jets disposed adjacent the backside of a mold surface to regulate the temperature over respective first and second areas of the mold surface. Gas heating and cooling circuits include two drive cylinder regulated plate valves for supplying gas at the gas impingement jet nozzles associated with the mold.

Abstract: Apparatus for manufacturing pin-stripe or common color thin-walled hollow shells for parts such as automobile door panels, controls and instrument panels from dry thermo-plastic powders include a powder box divider to form two or more compartments in a powder charge box and means for joining the charge box divider end-to-end with a mold separation edge on an open-ended heated mold for separating the mold into two or more sections; each compartment of the charge box has a different color powder. The charge box and mold are joined and then are rotated so that the powder is distributed into each mold section by gravity flow. Thereafter a third powder is distributed against an exposed division surface on the mold separation edge so as to form a pin stripe or common color for bonding prior cast multi-colored sections of a resultant shell of cured material.

Abstract: A high pressure mix-head for use in reaction injection molding systems includes a full cross section control piston and body slots and primary pour orifices for establishing pressure balance during recirculation and pour cycles.

Abstract: An apparatus for setting tonnage on selective tie bars of a die-casting machine includes providing a separate drive motor fully connected at all times to each tie bar nut gear.

Abstract: The invention provides a device for supporting a mold insert in space inside a mold cavity. A pilot and keeper assembly rests on the top of a mold part and extends into a mold cavity and through a small hole in the mold insert. Movement of a handle, which is part of the pilot and keeper assembly of the mold part, is transmitted through a shaft to a retaining means, which engages the opposite extremity of the hole to retain the insert in position during molding operations. After plastic is inserted into the base of the mold cavity and a sufficient curing time has transpired, the handle is rotated back to its initial position, thereby returning the retaining means to a nonretention position, and the pilot and keeper assembly is withdrawn from the mold.

Abstract: A gun sight positioning mechanism includes a slip clutch coupled sight slide that enables gun sight optics to be adjusted to extended firing ranges independently of gun inclination; a first range indicator fixed on the gun sight is associated with the sight slide to indicate the "range of target" and coincident adjustment of gun sight optics and a second range indicator is movably fixed to a gun elevating trunnion to serve as a memory of gun inclination so that a gunner will be able to remember to move (if required) the gun following manipulation of the sight slide to a different "range of target" position.

Abstract: A casting machine die evacuation system has a vacuum source for evacuating the die cavity during casting connected to a chill block vent passage through a vacuum cut-off plug driven by a high pressure hydraulic system into an evacuation position at the start of casting and into a vacuum cut-off position in response to fast shot plunger operation. The tip of the plug is held in contact with the chill block so that cast material flow into the chill block vent passage will flow around the diameter of the plug without acting to unseat the plug from its vacuum cut-off position.

Abstract: A method and apparatus for producing a molded article comprising covering at least a portion of the mold wall with a thin smooth surfaced soft lining as an integral permanent lower part of the mold cavity, thereafter loading a preformed grained vinyl shell against at least a portion of the soft lining; closing the mold and injecting a reactive plastic formulation into the mold such that the reactive plastic material forms a rigid backing layer that is strongly bonded to the vinyl shell without distorting the vinyl.

Abstract: Apparatus and a process for manufacturing multiple color thin walled hollow shells for parts such as automobile door panels, controls and instrument panels from thermoplastic plastisol includes a plastisol box divider to form two or more compartments in a plastisol charge box and means for joining the charge box divider end-to-end with a mold separation edge on an open-ended heated mold for separating the mold into two or more sections; each compartment of the charge box has a different color plastisol. The charge box and mold are joined and then are rotated so that the plastisol is distributed into each mold section by gravity flow with the plastisol from each section flowing to the divider which separates the colors so as to form two or more tones on a resultant shell of cured material.

Abstract: A hydropneumatic suspension unit includes a large diameter flanged road arm spindle which is bolted to the vehicle hull; a road arm has one end rotatably mounted on the road arm spindle and another end mounting a road wheel; a barrier fluid sealed piston is reciprocated relative to a road arm bore to seal an in-arm mechanically operated pneumatic spring which has a gas volume trapped by the barrier fluid sealed piston to support the sprung mass of the vehicle; the sealed piston is defined by a pair of spaced seals and an oil chamber which has an oil charge therein pressurized by preload spring on the piston to displace the oil barrier to both lubricate and preload the pair of spaced seals as the piston is dynamically operated to vary gas compression and produce a resultant pressure on the piston to counteract vertical forces on the road wheel.

Abstract: An improved method to surface condition a super-abrasive grinding wheel by intermittently moving the wheel to a stationary wheel conditioner unit mounted adjacent the grinding wheel with the conditioner unit having a consumable element engaged by the grinding wheel to condition the grinding wheel including a dual compensation method having the steps of grinding a predetermined number of workpieces to establish a first predetermined depth of super-abrasive wheel wear; periodically conditoning the wheel surface by consuming a second predetermined depth from a consumable reconditioning tool surface; and producing a first compensation of a grinding wheel by controlling the position of the super-abrasive wheel with respect to the workpiece to maintain an apparent wheel wear depth within the range of desired workpiece tolerance and producing a second compensation of a grinding wheel conditioner by contacting the wear surface of the super-abrasive wheel with the reconditioning tool surface and advancing it into and

Abstract: A hydropneumatic suspension unit includes a large diameter flanged road arm spindle which is bolted to the vehicle hull; a road arm has one end rotatably mounted on the road arm spindle and another end mounting a road wheel; a gravity oriented oil barrier is defined with a free volume enclosed within the road arm to submerge a sealing system for an in-arm mechanically operated pneumatic spring which has a gas volume trapped behind the oil barrier to support the sprung mass of the vehicle; the seal system is defined by a pair of spaced O-rings and a packing ring which seals the outer surface of a reciprocating rod that displaces the seal oil barrier to vary gas compression and produce a resultant force equivalent to pressure times the area of the rod to counteract vertical forces on the road wheel.

Abstract: A manual drive system for a turret includes a manually operated drive train for traversing the turret including two synchronizing bevel gears and two spur gears selectively engaged to transfer torque to a horizontal ring gear for rotating the turret and selectively disengaged to back drive a worm gear with respect to a lock worm that locks the turret in a predetermined traverse position.

Abstract: Grinding apparatus and a method for finishing face-type commutator are shown for producing a cycloidal like grinding pattern which has a controlled depth of surface roughness established by the grain size of abrasive grit and a pitch which is controlled by relative rotational speeds of the tool and the workpiece.

Abstract: An amphibious vehicle has an engine and a drive train connected to drive wheels with tires having a tread configuration that produces a water propulsion effect when the vehicle is driven through water. An auxiliary propulsion unit is selectively positioned in driving relationship to each of the wheels to improve water speed of the vehicle. The propulsion unit includes a gear box with its input connected to the wheel hub; its output connected to a propeller and an anti-torque strut is pivotally connected to the gear box and anchored to the vehicle hull whereby the propeller speed is increased by the gear box a desired amount as compared to axle speed to rotate the propeller at a speed to propel the amphibious vehicle.

Abstract: A vehicle mounted weapons control system has forward feed provided by a stepping motor drive system under the control of an analog controller without feedback from the weapons system. The controller includes a ballistic computer to produce outputs of train and elevation rates and stabilization means that includes means to modify the aforesaid rates to counteract vehicle disturbances and means to provide stabilization train and elevation rate signals which combine with the ballistic computer outputs to produce analog signals for use in controlling the rate of pulses generated in the stepping motor drives.

Abstract: A computerized die-casting machine control includes a microcomputer and a programmable controller having presettable inputs to establish a desired machine operating sequence. Temperature sensors at the holding furnace, cover die, ejector die, gate and at the die impact bushing monitor the die casting variables and produce input signals to the shot-control micro-computer. The micro-computer is programmed to take pre-programmed actions to correct out of tolerance conditions in the machine on a continuous on-line basis during machine operation.

Abstract: A die casting machine has a hydraulic shot ram controlled by a servo system that includes pre-settable thumbwheel switches to establish a desired memory of shot speed values and shot position presets in a programmable computer. An analog output responsive to the control program in the programmable computer produces a direct current analog velocity command signal. A servo amplifier includes means for comparing the command analog signal and a feedback signal from transducers sensing velocity of the hydraulic ram and position of valve means to produce an on-off servo valve signal so that a servo valve will modulate flow from a third state Olmsted shot valve so as to compensate for shot speed changes produced by changes in operational conditions including wear and build-up on a cylinder and ram; hydraulic oil heat-up during operation of the machine; and changes in flow characteristics of a molten metal due to temperature variations thereof.