Abstract: An aperture piece to be used in conjunction with backscatter instruments for measuring the thickness of a coating on a substrate of a concave workpiece. The aperture piece being selectively shaped so that a sample support surface, including an aperture through which radiation from a radioisotope is transmitted, may be inserted into the interior space defined by the concave workpiece to engage the concave surface. A method of calibrating backscatter instruments using the aperture piece to make correction for the failure to have a planar mating relation between the sample support surface and the concave workpiece.

Abstract: A collar on the drive shaft of a bicycle pedal hub is mounted with means to displace the collar longitudinally along the shaft. The displacement is accomplished by a limited reverse rotation of the pedals and shaft. The direction of the displacement may be in either longitudinal direction and depends upon the position of the collar before the reverse rotation of the pedals and shaft. Displacement of the collar causes a bicycle transmission to shift gears.

Abstract: A dispenser for dispensing articles carried on a web, the dispenser comprising a web, articles carried on the web, and a container for containing the web, the container having an aperature in a wall thereof for permitting the discharge of the web therefrom, and the container provided with a foldable flap, which flap is folded to form a ridge depending from the interior surface of a container wall in a region near the aperature, whereby the ridge inhibits the discharge of the web from the containers. The dispenser may additionally include a receptable for receiving and supporting the container, at least part of the receptable being deformable, the deformable part defining at least a portion of an orifice through which the web discharged from the container extends, the deformable part inhibiting the discharge of the web from the container.

Abstract: An infinity image visual display system comprising an input image source, a concave projection mirror, a concave eyepiece mirror and a single path-folding beamsplitter. The projection mirror images the input image source at the focal surface of the eyepiece mirror, which image is reflected by the eyepiece mirror and focused at infinity.

Abstract: A printing blanket holding bar adapted for insertion into a channel longitudinally extending along the periphery of a reel, the channel having a pair of flat, generally parallel side walls extending from the periphery of the reel, said holding bar comprising a base having a first flat surface and a second flat surface generally parallel therewith, each base surface adapted to be disposed against and cooperate with a corresponding channel side wall when said holding bar is operably inserted into the reel channel, a blanket clamping arm carried by said base and adapted to cooperate with said base to clamp an associated printing blanket end therebetween, a top surface of said clamping arm adapted to support the printing blanket when said holding bar is operably inserted into the reel channel and when the printing blanket is wrapped at least approximately one revolution around the reel, at least a substantial portion of said arm top surface being bowed, the tip of said arm tapering to substantially zero thickness

Abstract: A multi-speed bicycle transmission located at the drive pedal hub and manually actuatable shifting assembly therefor. The shifting assembly further includes a slidable collar mounted on and rotatable in conjunction with the drive pedal shaft within the drive pedal hub having camming means thereon engageable by pivotably displaceable shift pin means extending into the pedal hub to effect selective manually induced longitudinal displacement of said collar on the drive pedal shaft and an accompanying shifting of the gears in response thereto.

Abstract: For producing the seat or valve member of a labyrinth valve a number of rings of different diameter are placed one inside the other as a workpiece with their blade-like edges turned in the same direction. The group of rings is then slipped over the middle guide or stem of a jig so that the downwardly turned blade-like edges on the rings come to rest against upwardly directed ring-like blades on the jig. These blades are designed with a form answering to the form of the other valve part with which the workpiece is to be used. The rings in the workpiece are pressed down against the blades for leveling them and are then welded together, for example by electron beam welding.

Abstract: The sawing of an elongated workpiece, such as a log or cant, is effected by feeding the workpiece longitudinally through a saw; sensing the longitudinal configuration of a longitudinal side surface of the workpiece on one side only of the workpiece as the latter passes through the saw; and orientating the workpiece relative to the saw in accordance with the sensed configuration to saw the workpiece longitudinally substantially parallel to the sensed configuration. For the sawing of a crooked workpiece, the configuration of a longitudinally extending concave side surface is sensed and the workpiece is sawn "round the curve" substantially parallel to the sensed concave configuration.

Abstract: Improved system for controlling means attendant the discharge of coke ovens and for collecting particulate matter associated therewith by venting the exhaust gases through fabric filter means.

Abstract: Improved apparatus for cultivation of matrix-bound biologic cell systems on microcarrier particles within a replenishable nutrient medium providing controlled three dimensional displacement of a culture vessel and its contents to effect uniform cell exposure to available nutrient material.

Abstract: Electrodeposition of chromium of selectively constituted crystalline character and grain texture on metal substrates, such as aluminum or steel base lithographic sheet to provide improved and directly chromium plated aluminum or steel base lithographic sheet capable of operatively functioning as a surface plate after exposure of an applied photo sensitive coating thereon.

Abstract: An improved chemical carbonless copy paper system including an improved hot melt type of coating for CB type pressure sensitive carbonless copy paper having discrete liquid droplets of metallic salt solution electron accepting chromogenic reagent material contained therein.

Abstract: A filter bag having a protective cuff adjacent the closed "free" end of the filter bag for protecting the "free" end from abrasion damage. The protective cuff is preferably formed of a band of material attached circumferentially to the outer wall of the filter bag along a longitudinal edge of the band. The longitudinal edge is attached to the filter bag such that the longitudinal edge is spaced from the "free" end by a distance less than the width of the band.

Abstract: A probe guide for holding a coating thickness measurement probe in contact with a coated workpiece such that repeatable thickness measurements may be made without the necessity of the user manually positioning the probe head for proper contact. The probe guide having a probe holding assembly mounted on a stand; the probe holding assembly constructed to permit the probe to swivel freely in any direction about the geometric center of the probe head face. A workpiece holding means is provided for holding the workpiece against a probe head of the probe. By positioning the workpiece holding means to forceably move the workpiece into contact with the probe head face, the probe will swivel until the resultant vector through the center of moment of the static forces through the workpiece acting on the probe head at the point or points of contact between the workpiece surface and the face of the probe head passes through the geometric center of the probe head face.