Abstract: The chair has a specially constructed seat made up of a forward section, central section and rear section functioning respectively as thigh, tuber and sacral supports for an occupant seated in the chair. The central section serving as the tuber support is inclined upwardly in a rearward direction at a slight angle. The rear section or sacral support, in turn, is increasingly inclined at a greater angle to terminate in an arcuate rear edge for the seat so that the left and right sides of this rear section wrap around the sides of the central section to provide a crescent-shaped cup rim functioning to support the sacrum even when the occupant sits obliquely in the chair. Back and arm rests are provided and cooperate together to define a hip rest bulge which extends horizontally over 180.degree. so that again proper pelvic support is provided for an occupant sitting obliquely in the chair.

Abstract: The assembly includes a shaft having its opposite ends threaded in opposite directions. This shaft is passed through a hole in a door to which door pulls are to be mounted. First and second door pulls have oppositely threaded openings for receiving the ends of the shaft. A finished disc member having a central aperture is on the shaft and includes a pin extending into a key way on the shaft so that the shaft can be rotated by rotating the disc to draw the pulls together and thereby sandwich the opening of the door between the pulls. A finished appearance thus results.

Abstract: A motion picture camera includes a film pull down mechanism and shutter in which film is moved from one frame to the next in a 360.degree. operating cycle made up of a pull down time and a dwell time. The film pull down mechanism is designed to pull the film down in a period less than the dwell time of the film so that film exposure is increased over that occurring when the pull down time and dwell times are equal. The shutter has an opaque sector less than 180.degree. and an open sector greater than 180.degree. responsive to operation of the pull down mechanism to eclipse the film from exposure during the pull down time. The film pull down mechanism further includes a means for varying the length of film pulled down so that film frames of different vertical dimensions can be properly exposed by the same motion picture camera.

Abstract: The method involves preparing seed beds in the form of parallel troughs of substantially closer spacing than used heretofore. Seeds for grass having non-rhizoming characteristics are planted in these troughs at a given rate to provide a substantially uniform seed density for all of the troughs. The close spacing of the troughs together with the seed density results in a sufficient plant competition as to force the growth upwardly thereby resulting in a greatly enhanced turf appearance over that which would result using conventional trough spacing and rhizoming grass. The controlled spacing between the adjacent troughs is accomplished by inserting serrated discs between successive flanged discs making up the front and rear rollers of a conventional seeding apparatus.

Abstract: A continuous strip of brazing foil is partially folded about transverse parallel fold lines in a repetitive pattern. When this strip is positioned between the nodes of honeycomb cells the fold lines will index the cells into proper alignment for assembly. The brazing strip also serves its normal function of providing brazing material for attaching the assembly to other components.

Abstract: Front and rear downwardly extending arm rest support tubes are received in correspondingly positioned front and rear vertical receiving tubes on the side of a wheelchair. A pin is arranged to project into registered openings in the front telescoping tubes so that an arm rest on the arm rest support tubes can be positioned at a selected height and locked in such adjusted position. A specially designed handle is arranged to retract the pin when urged forwardly, the handle being engaged by the web of a patient's hand between the thumb and forefinger, unlocking of the tubes permitting vertical adjustment. Release of the specially designed handle results in automatic biasing of the pin into registration with aligned openings in the front telescoping tubes.

Abstract: Front and rear downwardly extending arm rest support tubes are received in correspondingly positioned front and rear vertical receiving tubes on the side of a wheelchair. An integral S-shaped rod has an upper horizontal extending portion arranged to project into registered openings in the front telescoping tubes so that an arm rest on the arm rest support tubes can be positioned at a selected height and locked in such adjusted position. The S-shaped rod also functions as a handle to be engaged by the web of a patient's hand between the thumb and forefinger. Urging of the S shaped rod forwardly unlocks the tubes permitting vertical adjustment. A spring biases the S shaped rod rearwardly to effect automatic locking of the tubes in the adjusted position when the handle portion of the rod is released.

Abstract: A dynamic braking system is provided for electrically driven wheelchairs to slow the wheelchairs to a stop without needing to use a mechanical brake. A primary switch arrangement is provided for connecting resistors across the right and left wheelchair motors automatically when the switch control is in its off position, either because of purposely positioning the control by the patient or as a consequence of power failure. In addition, a secondary switching system is automatically actuated in response to the primary switching system being moved to its off position to cross connect or short circuit the terminals of the right and left motors to each other only after a given period of time to provide a secondary braking action to the motors and bring the wheelchair to a complete rest.

Abstract: The broccoli bunching apparatus is wholly pneumatically operated. In response to a first operation on a manual pneumatic control switch, a rubber band is pneumatically expanded in front of a central opening in a housing. Broccoli stems can then be inserted through the rubber band and the opening. A second operation of the pneumatic control switch results in the rubber band retracting about the stems and simultaneously a knife blade within the housing cutting the stems. Also, an ejector is automatically operated after a given delay time to strip the cut broccoli stems from the rubber band expander so that the apparatus is ready for repeating the operation.

Abstract: The ligament replacement is obtained by taking a tendon from an animal of appropriate size to function as the substitute for the particular human ligament to be replaced. This tendon is cut to an appropriate length and immersed in a fixing solution such as glutaraldehyde for a sufficient length of time to bind the tissue. The tendon is wrapped in a protective covering and absorbable sutures are passed through the tendon to provide openings. After the tendon is grafted to the human portions formerly connected to the ligament to be replaced and healing has begun, scar tissue can then migrate into the openings left by the absorbable sutures to increase the strength and the securement of the tendon to the bone portions.

Abstract: When conventional honeycomb structures are formed into cylinders, the inner wall made up of the inner edges of the individual honeycombs is circumferentially compressed and the outer wall made up of the outer edges of the honeycombs is circumferentially stretched. As a result, the height of the inner wall increases and the height of the outer wall decreases resulting in a bowing in of the central portion of the cylinder so that the cylinder assumes an hourglass shape. This bowing in can be avoided by corrugating the original ribbon core material in the manufacture of the honeycomb in such a manner that one longitudinal edge of the corrugated ribbon follows a wave form of an amplitude greater than the wave form defining the opposite longitudinal edge.

Abstract: The automatic loader successively transfers individual microfiche from a stack of master microfiche in a hopper to an exposure station in a microfiche duplicator. The duplicator makes a copy of the master microfiche on film carried in the duplicator. The loader then automatically transfers the exposed microfiche to a collecting bin. The arrangement is such that while one master microfiche is being exposed, an already exposed microfiche is being removed and a new master microfiche placed in a ready position for subsequent exposure. A specially designed turntable and cooperating shuttle function in timed sequences to effect the foregoing movements.

Abstract: A grand piano or a vertical piano is equipped with a proportional sensor and a proportional actuator, both connected to the damper lifter tray (in a grand piano) or damper actuator bar (in a vertical piano). During a piano performance the instantaneous position of the lifter tray or actuator bar as the case may be is sensed and recorded, in addition to the keyboard activity. At a later time when the performance is reproduced, the actuator positions the lifter tray or actuator bar, as the case may be, in such a way that the dampers are positioned in an imitation of the way they were positioned during the original performance. The result is that subtle pedalling effects formerly lost are accurately reproduced. The method and apparatus of the invention apply equally well to the soft pedal as to the sustaining pedal, both of which affect the vibrating characteristics of the piano strings.

Abstract: First, second and third plates make up a laminated separator plate structure for substitution in place of the normal separator plate provided between the valve body and the transmission case in an automatic transmission system. The center of the three plates includes various sized openings registering with correspondingly positioned openings in the first and third plates and also defines channels interconnecting additional openings provided in the first plate to reroute transmission oil in the various inter-related passages in the casing in such a manner as to decrease the shift time carried out by said automatic transmission system.