Abstract: A protective garment having a ventilation system having means for selectively varying the pass of ventilation air through the garment and the size of the openings of the ventilation entry and exit panels to provide proper ventilation and prevent billowing of the garment.

Abstract: The pivoted bridge and string securing assembly (26) of a stringed guitar is operated to produce a vibrato sound by means of a handle (96) that is both detachable and rotatably adjustable. A hollow bolt (66) is rotatably mounted to a bridging plate (30) of the bridge assembly and provided with a controllably adjustable frictional restraint (80) against rotation. The vibrato handle has a mounting leg (100) received within the bore of the hollow bolt, is keyed (78, 102) to the bolt for frictionally restrained rotation therewith, and is detachably latched to the bolt by a latching spring (106).

Abstract: A pick-and-place machine having magnetic elements which hold down the chips at the pick stations, thus preventing shingling, and also hold such chips at the pick stations adjacent a stop element. The magnetic elements create magnetic forces in two directions relative to chip elements having magnetizable terminal portions. The magnetic elements are provided in combination with feed apparatus that is adapted to stop, when the associated groove is full of chips, rather than causing the machine to jam.

Abstract: A unitary system incorporates an upper reservoir container having a blood gas separator, a cardiotomy reservoir and a venous reservoir. The upper container is positioned directly above a lower mass transfer container coupled with the venous reservoir by means of a check valve and having a spirally wound flattened tubular transfer membrane. A vacuum is drawn upon an upper portion of the reservoir container which carries a blood gas separator into which aspirated wound site blood is drawn for filtering and collection of blood in the cardiotomy reservoir. The latter is automatically drained via a pressure responsive valve into a venous blood reservoir at the lower portion of the reservoir container and into which venous blood flows for mixing with the filtered cardiotomy blood.

Abstract: An adjustable keyboard for typewriters, computers, and similar machines, is divided laterally into first and second sets of keys, with each set being adjustable about each of two mutually angulated axes so as to change the planes of the sets relative to each other and relative to the support, and also to allow each set to be angularly shifted in its own plane. The keys of each set are mounted for individual adjustment angularly, laterally, and in height. This allows the overall configuration of each set of keys to be individually adjusted for the convenience, physical, and operating characteristics of the arms, hands, and fingers of each operator.

Abstract: This invention provides a captive fastener in which a nut is held to a workpiece by a retainer ring held in a two-piece grommet attached to the workpiece, the retainer ring being flat and split, with its grain perpendicular to a diameter bisecting the split, and its inner and outer edges having alternate elongated recesses to increase the effective ring width without increasing spring force. The stud assembly includes a cage secured to the other workpiece, with side flanges removably and floatingly retaining a housing in which is a stud and spring biased ratchet washer. The notched outer end of the housing is bent over the head of the stud to secure the stud. The ratchet washer has tabs fitting in the housing wall, and ratchet teeth to engage teeth on the end of the nut. A cover fits over the housing.

Abstract: Improved laying of high strength composite tape is achieved by stretching a strip of tape entirely across the area on which the tape is to be laid before pressing any part of the tape against the work surface, and then pressing the tape against the surface while the tape is stretched across and adjacent the work surface. The tape is held and stretched across the work surface on supply and takeup reels on opposite sides of the work surface, so that the reels need not move along the tape with the moving pressure foot. The pressure foot and both reels are mounted for independent motion completely around the work surface to enable tape strips to be laid in all directions across the work surface without rotating the work surface.

Abstract: An electrical resistance-type corrosion measuring probe provides an output signal corrected for temperature by computing the ratio of resistance of a test element exposed to a corrosive element to resistance of a reference element protected from the environment. A secondary temperature compensation is provided for by compensating the corrosion output signal for dynamic or short term variation of temperature difference between test and reference elements. The corrosion output signal is compensated for still other environmentally induced errors by measuring temperature gradient between an inner end of the probe within the fluid environment and a portion of the probe outside the corrosive fluid environment. Errors in corrosion probe output signal due to bending stresses on the probe that result from fluid flow velocity and fluid pressure of the environment, are also compensated by measuring bending strain and pressure to provide additional compensation for the corrosion output signal.

Abstract: The image formed by a laser flying spot scanner on a photosensitive medium is subject to error in size and/or position because of deviation of the photosensitive surface from a nominal position. The deviation will occur if the substrate carrying the photosensitive surface does not have a uniform thickness. In a scanning system having a code mask that produces reference signals for controlling timing of writing beam modulation, compensation for the error is provided by maintaining a fixed distance between the code mask and the surface of the medium. The code mask floats freely upon the medium surface to move up and down with height variations of the surface as the medium passes under the code member and under the writing beam. Alternatively, the platen that supports the photosensitive medium is allowed to float and is continuously urged upwardly against spacing or position sensing devices to maintain the medium surface at a fixed distance from the mask.

Abstract: An extra-capsular cataract surgery system including a handpiece having first and second passageways for irrigation and aspiration purposes, respectively, the system including an attachment for quick connection to the handpiece, the attachment having first and second passages for communication with the passageways of the handpiece, the attachment having a main body portion with a first cannula fixedly attached thereto in an axial position with a piston-like member having a second cannula configured for being received on the first cannula in coaxial sealing relation. Each cannula has a port adjacent the end thereof. The piston-like member is received within a bore in the main body portion and is rotatable and axially displaceable therein. A luer attachment is provided for connection to the handpiece for infusion only.

Abstract: Plasma spray coating of parts in a low-pressure chamber utilizes a linear induction motor drive system having gapped tracks for supporting and driving part carriers to flow in a continuous series of discrete steps through the low-pressure chamber where the parts are momentarily stopped for preheating and spray coating. Input and output air locks are sealed and unsealed by valve gates that move through the track gaps to optimize the sealing of the locks.

Abstract: An outrigger or downrigger fishing clip comprises a U-shaped arm pivoted to a body to define a cavity between the arm and body in which is positioned a roller journaled in the arm so that a fishing line extending through the clip between the arm and body rides friction-free over the roller. Shrouds extend from the body over the roller ends to prevent a line from slipping over the ends of the roller and getting caught between the roller ends and the pivoted arm. A latch link spans the arm and body, extending through outwardly opening mating recesses in the arm and body and has a cam element engaging the free end of the roller of the shaft. The latch link is resiliently pressed against the body within the recess to provide a selectively adjustable force that resists pivotal release of the arm and of the tensioned fishing line entrained over the roller.

Abstract: An outrigger or downrigger fishing clip comprises a U-shaped arm pivoted to a body to define a cavity between the arm and body in which is positioned a roller journaled in the arm so that a fishing line extending through the clip between the arm and body rides friction-free over the roller. Shrouds extend from the body over the roller ends to prevent a line from slipping over the ends of the roller and getting caught between the roller ends and the pivoted arm. A latch link spans the arm and body, extending through outwardly opening mating recesses in the arm and body and has a cam element engaging the free end of the roller of the shaft. The latch link is resiliently pressed against the body within the recess to provide a selectively adjustable force that resists pivotal release of the arm and of the tensioned fishing line entrained over the roller.

Abstract: Spinning of one of a pair of powered vehicle wheels is prevented by anti-spin cylinders connected between the master cylinder and each wheel cylinder. In normal operation, brake fluid passes through the anti-spin cylinders from the master cylinder to the wheel cylinders. If a differential rotational speed of the wheels is detected, one or the other of the anti-spin cylinders is operated to close its connection to the master cylinder, and to pressurize the brake fluid in the anti-spin cylinder so as to brake the spinning wheel. In one embodiment, pistons of first and second anti-spin cylinders are connected to be alternatively driven by a single double-acting vacuum-actuated diaphragm, with the diaphragm and anti-spin cylinders compactly packaged partly within the housing of a vacuum accumulator that drives the anti-spin cylinders.

Abstract: The precision rotatable polygonal mirror of a laser scanning system is fixed to one of a pair of spaced flanges of a rotatable shaft, and has one surface supported upon a fixed air bearing. A floating air bearing is formed to define a differential piston which is pressurized to load the bearing and provide the desired air film bearing thicknesses. The two part thrust bearing has a net effective axial dimension that varies to significantly decrease required tolerances, to minimize moments introduced into the shaft and polygonal mirror, and to provide a more constant air bearing clearance over a larger range of air pressures.

Abstract: A laser pattern generator for making a printed circuit board master image has its control data divided into image components according to whether a component is a simple figure such as a trace 32 that readily lends itself to conventional data compression coding or a more complex pattern 35 that is less readily coded. Data describing the complex patterns are prestored in a data library 358. Scan line elements of traces and patterns are independently assembled in separate work buffers 366-372. Data in the separate work buffers are then combined, either additively or subtractively, for assembly in a line assembly buffer 374 from which a data stream is derived for modulation of the laser 10. Additively combining data from the work buffers allows one image component to be electronically overlaid upon another, whereas subtractively combining data from the work buffers enables the pattern defined by subtractive data to be removed from another pattern.

Abstract: This invention provides a feed arrangement for chips in a pick-and-place machine in which a vertical magazine feeds chips into a groove in a vibrating table, with the chips being advanced toward a pick station by a gravity actuated lever which will be stopped in the event the groove is full of chips rather than causing the machine to jam or cause damage.

Abstract: This invention provides improved fatigue life for a fastener having a sleeve associated with a basket and extending through an opening in a workpiece. The sleeve has curved lobes that penetrate the workpiece to prevent rotation, the lobes having inclined leading edges, and inclined abutment surfaces at the inner ends of their roots that compress the displaced material of the workpiece around the entrance to the opening.