Abstract: A centrifugal balancer is combined with a computer system programed to suggest trial weights and placement and correction weights and placement to be used in interactive menu driven balancing sequences. Vibration responsive transducers provide inputs to automatic multi-gain amplifiers in a computer interface. The signals produced by the amplifiers are filtered by adjustable bandpass filters which are driven to match the rotational frequency of the work piece being balanced. Peak detectors rectify the output of the filters and an analog-to-digital converter processes the output of the peak detectors. A counter, reset by a sensor monitoring work piece rotation, is incremented until disabled by zero crossing detectors monitoring the outputs of the filters to provide relative phase information.

Abstract: An interference filter having 17 coatings of alternating high and low index materials is located on the illumination path of an optical device and provides correction for green color distortion on the observation path and correction for blue color distortion on the photo path in order that both the observed image and photographed image are color neutral.

Abstract: A protraction device for a measuring microscope comprises a reticle aligned on an optical path of the microscope at an intermediate image plane thereof and adapted for rotation about a central axis, and an angle encoder operably coupled to the reticle such that when the angle encoder is rotated about its rotational axis, a corresponding rotation is produced in the reticle. The angle encoder provides a signal representative of an angular displacement of the reticle which is delivered to a printer, digital display, or the like.

Abstract: An enhanced calcium hydroxide, a process for its manufacture and a process for its use in the removal of volatile heavy metals from a gas is disclosed.

Abstract: A lensmeter accessory is disclosed for supporting and positioning a corneal contact lens in a light path of a lensmeter. The accessory comprises a generally planer body with a tapered slot therein having a slot wall defining a recessed groove for receiving and removably holding a contact lens. The accessory may be placed on an adjustable lens platform of a lensmeter to position the contact lens in the lensmeter light path.

Abstract: A reciprocating abrading, polisher or buffing tool is disclosed in which a counterweight for a shoe adapted for the mounting of an abrading, polishing or buffing member is driven by the shoe for oppositely directed reciprocating movement. Pairs of guides for supporting the shoe and counterweight for reciprocating movement are mounted on a shroud having halves fixed to each other and to depend from a rim of a body of the sander or polisher, so as to permit selective rotational displacements of the shoe and counterweight relative to the body. In one form of the invention employing suction to withdraw dust from adjacent the shoe, the shroud is employed to positionally locate an L-shaped connecting duct relative to a dust discharge opening in the shoe and a dust collecting duct leading to an aspirator.

Abstract: An alignment override control for effecting automatic vertical alignment of a test axis of an ophthalmic instrument with the center of an eye is disclosed. The test axis is associated with optical alignment means of the instrument vertically movable by an elevation motor controlled by a motor drive. A joystick and a pair of directional switches are connected to the motor drive for manual positioning of the test axis. When the eye comes within a field of view defined by the optical means, the override control disconnects the switches and automatically signals the elevation motor to effect automatic alignment using signal information originating from the optical means.

Abstract: A modular microscope system includes a plurality of stackable housing modules each having a plurality of inwardly pointing protuberances provided with one or more precision stop surfaces thereon for removably mounting and positioning a plurality of prealigned functional element carriers having corresponding precision stop surfaces thereon for engagement with the precision stop surfaces of the housing module protuberances.

Abstract: A mammary prosthesis is disclosed as comprising a wedge shaped sheet of flexible biocompatible material having reinforced upper and lower attachment portions for attachment to bone of a patient by bone anchors, with the lower attachment portion being anchored to one or more ribs. The lower attachment portion includes a support member less flexible than the sheet material having suture receiving openings for receiving bone anchor sutures. A method of surgically implanting the mammary prosthesis is also disclosed.

Abstract: A lever operated tool, such as a chain hoist, is provided with a free wheel mechanism allowing a lift wheel to be selectively disconnected relative to a driving gear in response to rotations of a manual control knob. The knob controls sliding movement of a driven gear mounted for rotation with the lift wheel between first and second positions in which it is engaged with and removed from engagement with the driving gear.

Abstract: A method and apparatus is disclosed for use in weighing products having circular or oval footprint configurations. A conveyor having a pair of parallel conveyor elements arranged to underengage the footprint only adjacent the periphery thereof transports the products one at a time across a planar surface of a weigh pan or scale device. The surface of the weigh pan is shaped and the transverse spacing between the conveyor elements is adjustable in order to permit lengths of the surface of the weigh pan engaged by the conveyor elements to be selected to correspond essentially to dimensions of differently sized products to be weighed.

Abstract: A J-hook designed for use in towing vehicles is forged of micro-alloy steel and has a T-shaped cross-section throughout a load bearing portion thereof and an enlarged tip. The disclosed J-hook is much stronger than prior art towing J-hooks without significant increase in overall weight.

Abstract: This invention provides a reaction-bonded silicon carbide article having superior abrasion resistance, oxidation resistance and uniformity in which the bond phase comprises appreciable amounts of both silicon oxynitride and alumina. Also provided are a raw batch and a process for producing the reaction-bonded article.

Abstract: A microscope objective adjustable for different cover slip thicknesses includes an outer ring rotatable about an optical axis of the objective, an intermediate mount carrier having a plurality of inner lens mounts fixed thereto, and an inner correcting lens mount axially movable between a pair of fixed lens mounts. The correcting mount is coupled to the outer ring for rotation therewith by a follower pin extending through a curved cam slot in the intermediate mount carrier and into an axial groove in the outer ring, such that when the outer ring is rotated the correcting mount moves axially due to engagement of the follower pin with the cam slot and simultaneously rotates about the optical axis due to engagement of the follower pin with the axial groove.

Abstract: An apparatus and method for aligning the optical elements of a microscope are disclosed wherein a fixture is provided for locating and mounting a plurality of mirrors for reflecting an object image along an optical path to an adjacent eyepiece connected to the fixture by an eyepiece holder. The eyepiece holder includes an outer sleeve attachable to the fixture, an inner sleeve transversely movable within the outer sleeve for slidably receiving the eyepiece, and positioning means comprising a plurality of angularly spaced screws extending through the outer sleeve for engaging the inner sleeve, whereby the eyepiece may be aligned on the optical path by selectively adjusting the screws.

Abstract: A refractory tile adapted for protecting boiler tubes from the corrosive and erosive effects of a hot gas stream comprises an elongated ceramic body covering only that side of a boiler tube upon which the hot gas impinges. The tile is hung on the tube with a threaded stud anchored on the tube and a nut threaded on the stud, urging the tile against the tube.

Abstract: A rotary cutter employs a disc blade removably mounted on a cylindrical bearing surface portion carried to upstand from adjacent one end of a handle and a swing arm movable between a retaining position in which it overlies the disc blade and a release position in which it is removed from overlying relation with the disc blade to permit removal thereof, wherein a first latch portion disposed adjacent the bearing surface portion and a second latch portion carried by the swing arm engaged to removably retain the swing arm in its retaining position.