Abstract: A method of grinding a workpiece which is susceptible to deflection and/or deformation when grinding is carried out by relatively infeeding a grinding wheel to keep the wheel face and work surface in relative rubbing contact at an interface region, the method comprising continuously determining the force exerted by the wheel on the workpiece at the interface region as grinding conditions change, continuously applying to the workpiece at least one counterbalance force which in equivalent effect is opposite in sense to the determined force, and variably controlling the counterbalancing force to maintain its effective magnitude equal to the magnitude of the determined force.

Abstract: A grinder for removing a predetermined amount of rubber at a predetermined angle from a raised or recessed area on the sidewall of an inflated tire as the tire rotates. A pair of spaced sensors engage the sidewall area of the tire at predetermined radial spaced locations on opposite sides of the area to be worked. The sensors generate a pair of electrical signals in relationship to the profiles of the sidewall areas engaged thereby. The signals are fed to a microprocessor which calculates the average angle of the raised or recessed area by the difference between the outputs from the two sensors along with the known spacing therebetween and generates a third signal. This third signal is supplied to a servo mechanism which automatically adjusts the grind angle of the grinding wheel to match the average angle of the area to be ground.

Abstract: Scratch-free polished diamond is obtained by rubbing a surface of the diamond to be polished against a smooth complementary diamond surface with sufficient pressure and velocity to heat the surface being polished above the spontaneous thermal degradation temperature of the diamond. Such a method can be used to burnish diamond-on-diamond bearings in as little as ten minutes as compared with up to three weeks by prior polishing techniques. Excessive thermal degradation of the diamond is avoided by cooling the surface being polished, preferably by cooling intermittently. The same techniques are usable for other superhard material such as cubic boron nitride.

Abstract: An interface structure between a recoiling gun and a stationary ammunition supply having a plurality of elongated, individually rigid, guide elements, for providing continuous guide surfaces for the individual elements which are connected to form the endless conveyor and the individual rounds of ammunition respectively carried thereby, and having three degrees of freedom of movement.

Abstract: In a numerically controlled grinding machine of the type which is adapted to perform a machining operation on the basis of the feed amounts specified as relative amounts in various modes of different grinding wheel feed speeds, a feed controller comprising in combination: a contact detector adapted to produce a contact signal upon detection of contact of the grinding wheel with a workpiece; a non-grinding feed remainder detector including a counter for counting feed control distribution pulses to detect the remainder of a preset feed amount at least in a non-grinding mode from a variation in the count value of the counter during a period between a time point of starting the non-grinding mode and a time point of receiving the contact signal from the contact detector; and a feed mode changing means adapted to change the feed mode of the grinding wheel in such a manner as to effect the remainder of the non-grinding feed at a speed lower than that of the non-grinding mode in response to the contact signal from th

Abstract: A cam grinding machine of the type in which a grinding wheel is moved toward and away from a cam shaft rotatably supported on a table, thereby to shape intake and exhaust cams of said cam shaft to predetermined profiles, the cam grinding machine comprising: means for detecting the machined condition of the cams in spark-out grinding; means for setting spark-out ending conditions separately for the intake and exhaust cams; means for judging whether the machined condition in spark-out has reached a level complying with the spark-out ending condition, separately with respect to the intake and exhaust cams; and means for stopping the spark-out when the machined condition comes into compliance with the spark-out ending condition.

Abstract: A machine is provided which automatically cuts and polishes disks of marble and finishes the edges of those disks. A marble cutting saw blade and a marble polishing wheel are disposed on a track located in spaced separation from a turntable. The turntable includes a central supporting pedestal and peripheral spacers which may be selectively located on a support to bear against the underside of a marble slab just within the diameter of a round disk which is to be cut therefrom. The sawing and polishing assemblies are mounted on separate carriages which move longitudinally along the track. The sawing and cutting assemblies can be adjusted vertically by means of separate, power driven drives. The speed of rotation of the turntable can be altered. An arbor is preferably located on the track between the two carriages to project toward the turntable. The arbor stabilizes the marble slab as it rotates with the turntable.

Abstract: A system for performing operations on the edge of an irregularly shaped workpiece, such as seaming the edge of a piece of glass (G) is accomplished by moving the glass (G) along a conveyor (11, 12). The edge of the glass (G) is detected by a camera (13) which makes images of the glass (G). Electronic circuitry (20) receives the image information from camera (13) and determines the location of the edge of glass (G) at a plurality of locations and stores information which is indicative of the entire profile of the glass (G). Additional circuitry (32) receives signals proportional to the location of the seaming heads (16, 18) and compares these signals with the data stored in circuitry (20). When the glass (G) has moved downstream to the position to be seamed, the seaming heads (16, 18) are then moved to the position of the detected profile of glass (G) to perform the seaming operation.

Abstract: A device for dressing a grinding wheel with an outer profile with the radius R.sub.1 comprises a dressing roller having a circular dressing profile with the radius R.sub.2. In order to admit dressing of grinding wheels with different profile radii R.sub.1, the dressing roller and the grinding wheel can be moved so in relation to each other that the relative motion has the shape of a circular arc with the radius R.sub.2 -R.sub.1, the radius being adjustable in order to obtain the desired profile radius of the grinding wheel.

Abstract: An improved sabot fragment and gun gas diverter of particular utility in conjunction with a rotatable multiple barrel gun is described, which comprises, a diverter member mounted forward of the barrels for rotation therewith and defining a generally conical, radially outwardly divergent impact surface from which sabot fragments are diverted outwardly upon impact thereon; a plurality of axial bores through and spaced around the diverter member correspond in number to and are respectively coaxial with the rotatable gun barrels; an impact surface is attached to the gun forward of the diverter member for diverting the fragments from the gun in a predetermined direction relative to the gun; a housing around the diverter member defining an internal chamber into which the fragments are diverted from the diverter member may include the impact surface as a forward end wall thereof, and may include an exit port for passage of fired projectiles and discharge ports for discharging diverted sabot fragments.

Abstract: An arbor is threaded in a first direction. An adaptor bushing is disposed on the arbor and is externally threaded in a second direction opposite to the first direction. A reinforcing plate is rotatable on the adaptor bushing in the second direction. A detent arrangement may be provided on the adapter bushing and the reinforcing plate to limit the movement of the reinforcing plate relative to the adaptor bushing. An abrasive wheel or disc is provided with first and second opposite surfaces and abrasive particles are disposed throughout the disc. A nut is disposed in a bore in the disc and is threaded for rotation on the arbor in the first direction. When the disc engages the reinforcing plate, continued rotation of the disc in the first direction causes the reinforcing plate to rotate in the second direction and to press against the disc.

Abstract: A wire saw machine having a wire supply source providing a plurality of strands of wire results in a wire saw system having parallel wires. The wire supply source feed spindle holds a supply source at a slight angle advance to allow the wire to transfer from the supply source to a grooved wire guide in a parallel manner. Two moveable wire guides are used to impart a back and forth motion to the wire over the cutting area and at the same time serve as an intermediate storage area for the wire being used in the cutting area. The wire supply source includes a plurality of individually rotatable wire reels. A friction disc is located between each of the individual wire reels and is held fixed with respect to the spindle.

Abstract: During grinding of successive workparts with a superabrasive wheel in a rough grind stage at a high wheel infeed rate and a finish grind stage at a relatively low infeed rate with spark-out stages after each of the rough and finish grind stages, the duration of the spark-out stage after rough grinding is made dependent on the condition of the grinding wheel and corresponds to the time needed for removing workpart material for the reduction of the grinding wheel motor power from the high rough grind level to the lower finish grind level. The duration of the spark-out stage will therefore be variable from one workpart to the next as the condition of the wheel changes. In addition, the interval of wheel retruing or dressing (i.e. number of workparts ground between wheel retruing) is variable as determined by the condition of the wheel. In particular, when the rough spark-out stage for a workpart is completed in a time shorter than a preselected minimum time indicative of a wheel that is in need of retruing.

Abstract: A belt finisher of the type where an operating belt moves between a drive and driven wheel. The entire operable system of the device is supported on a fixed frame which in turn is mounted for partial rotation with respect to an overall support in two different planes so as to respectively vertically and laterally position the driven wheel with respect to objects to be finished, e.g., sanded or polished, at a work station. In addition, the drive system for the driving wheel is entirely carried by a pivotal plate which is in turn attached to the frame at the rear thereof. The drive system including means for continually tensioning the belt and for releasing such tension by partially rotating such pivotal plate.

Abstract: A honing device which employs a plurality of radially-displaceable tools mounted circumferentially around a rotary body. The tools are constructed as a laminate formed by the axially elongated abrasive strip bonded to and overlying a wood backing strip. The abrasive strip has a width, as measured in the direction of rotation, which is normally less than the width of the backing strip. The abrasive and backing strips are radially urged for simultaneous contact with the cylinder wall being honed.

Abstract: A method and apparatus for deactivating a partially flooded perforating gun assembly utilizes a fuse which extends downwardly to the lower end of a perforating gun section and is then associated with an explosive coupler having a means for interrupting the transmission of an explosive force upon the presence of undesired fluid in the lower end of the gun section.

Abstract: A guide for the grinding of a surface of an object having a region to be examined is provided by this invention. The guide includes at least two conductive leads and a conductive control track interconnecting the conductive leads and extending across the surface to be ground. At least a portion of the rear edge of the track is precisely located with respect to a predetermined grinding depth of the region so that a break in the track occurs with the grinding of the surface to that grinding depth.

Abstract: A machine for grinding an object, such as a printed circuit board coupon, having a region to be exposed and having a novel control track that has at least a portion of the rear edge of the track precisely located with respect to a predetermined grinding depth for the region is provided according to this invention. The grinding machine includes means for engaging the object with an abrasive device and means, interconnected with the control track on the object, for disengaging the object and the abrasive device when a break in the track has been ground.

Abstract: Apparatus is disclosed for grinding the edges of a glass sheet which is positioned on a motor driven rotary table. The apparatus includes a grinding disc mounted to rotate in a toolholder which may be moved in relation to the axis of rotation of the rotary table by a constant torque motor so as to apply a constant grinding pressure between the grinding tool and the glass sheet. A plurality of manometer capsules or other pressure measuring devices whose voltage outputs depend on applied pressure, are used to produce signals to regulate the constant grinding force. The toolholder is movably mounted on a larger positioning carriage which can also be moved in relation to the axis of rotation of the rotating table in order to compensate for irregular glass sheet shapes. This positioning is effected by signals from a distance to voltage converter fed into an adjustment circuit which drives a positioning motor.

Abstract: The disclosed apparatus provides rigid support for the grinding wheel by having the wheel shaft off center in the support housing. The one-piece housing can now have mass and bulk disposed in the plane of the contact force, for greater rigidity. The extra bulk provides room for a conduit internally in the housing to feed coolant to the wheel.