Abstract: Adaptors for a double taper collet chuck in the form of first and second adaptor rings with inside tapers complementary in shape to collets and outside tapers interfitting with the collet chuck enable a particular collet chuck to handle a wide range of collets. The adaptors thus minimize the need for a changeover for different chuck sizes in multiple machining operations.

Abstract: In a digital fluorography system a television (TV) camera converts X-ray images to analog video signals that are converted to digital pixel words in an analog-to-digital converter (ADC). The sync signals for the TV camera and the sample clock signals for the ADC are derived from a novel resettable crystal controlled sync generator. A phase-locked loop provides an ac reference signal at one-half power line frequency which is equivalent to TV frame rate. The sync generator is reset to start a new frame and an ensuing sequence of crystal controlled horizontal sync pulses only in response to occurrence of ac reference signals so every frame is in registration. A digital video processor (DVP) subtracts a mask image from each image in a sequence of images that are acquired while an X-ray contrast medium is appearing in and disappearing from a blood vessel. The resulting difference images are stored in analog video signal format in an analog video disk recorder.

Abstract: In a nuclear imaging system the digitized x and y coordinates of gamma ray photon emission events address memory locations corresponding to the coordinates. The respective locations are incremented each time they are addressed so at the end of a selected time or event count period the locations contain digital values or raw data corresponding to the intensity of pixels comprising an image frame. The raw data for a frame is coupled to one input of an arithmetic logic unit (ALU) whose output is coupled to a display controller memory. The output of the controller memory is coupled to another ALU input with a feedback bus and is also coupled to a further signal processing circuit which includes means for converting processed data to analog video signals for television display.

Abstract: In an elastic band applicator for diapers using hot melt glue, a longitudinally tensioned moving plastic backing sheet is run over a roll that is parallel to and spaced from a stationary cylinder. A shoe deflects the central region of the sheet away from its plane at a location between the roll and cylinder. This results in the margins of the sheet beyond opposite ends of the shoe becoming loose flaps. Glue stripes are applied by means of nozzles to the sheet near its edges before the sheet encounters the shoe which has passageways for the glue stripes. Elastic bands are fed into the passageways onto the glue stripes. After passing the shoe, the margins encounter plows which turn or fold the margins over the glue stripes and bands and press the sheet against a cylinder to smooth the margin. Means are provided for retracting the sheet away from the hot nozzles if the sheet stops moving.

Abstract: Collimator for regulating the shape and size of the pattern of radiation projected on a radiation detector from a radiation source, particularly for regulating the beam of radiation in a medical diagnostic x-ray machine. One or more (preferably three) longitudinally stacked plates are provided, the top plate having a large aperture, the middle plate having a medium sized aperture, and the lower plate having a small aperture. The middle and lower plates are provided with means to substantially open up their apertures, rendering these plates inactive when they are not in use. Each plate is longitudinally movable between first and second extremities of travel, the first extremity being nearest the radiation source. When each plate is at its first extremity of travel the beam of radiation has its maximum size.

Abstract: A molten metal sampler is disclosed which includes a mold cavity defined by a steel sleeve having an accurately machined and polished interior surface and a steel disc defining one end of the sampler remote from the sample entry passage by a steel disc having a projecting bolt which becomes imbedded in the sample as it cools and in which the steel disc provides a laterally extending annular flange on the sample so that it can be suspended from a collar for a jominey test. The sleeve and integrally formed flange eliminate the need to machine the sample to prepare it for testing.

Abstract: A magnetic drill holder is comprised of a nonmagnetic housing and a magnetic back plate. The housing is fabricated as a series of adjoining longitudinal channels, each having one closed end. A common magnetic back plate encloses the channels longitudinally, thus forming longitudinal receptacles. The channels may be of varying lengths and areas, making them suitable for holding a series of tools, such as drill bits. Magnetic tools placed in the receptacles are retained in them by magnetic attraction. The tool holder further includes a pocket that utilizes the magnetic back plate and a housing rib to hold a selected tool, such as a drill chuck key, in the tool holder.

Abstract: Apparatus and methods are provided for performing temporal and hybrid subtraction of X-ray images. In one mode, using three memories, a pair of low and high energy X-ray exposures are made before an X-ray contrast medium arrives in a blood vessel to provide mask images. After contrast arrival additional high and low energy exposures are made and the low energy mask is subtracted from the low energy post-contrast images and the high energy mask is subtracted from the high energy post-contrast images and the resulting sequence of low and high energy temporal difference images are stored. The low energy temporal difference images are displayed. If motion artifacts are perceived, hybrid subtraction of low and high energy temporal difference images is undertaken to produce an image data set in which motion artifacts are removed. In an alternate mode, which uses four memories, low and high energy pre-contrast mask images are stored in one pair of memories.

Abstract: A metal nut for clamping a metal or nonmetal x-ray target to a metal anode stem or a rotating anode x-ray tube. The nut body is basically circular and has an axial threaded hole. The body has an axially extending cylindrical portion that is contiguous with a generally convex portion on one side of the cylindrical portion and is concave on the other side. The concavity is surrounded by an annular land for transmitting compressive force to the target. A cross-section of the nut simulates a beam that is thickest axially adjacent the central threaded hole and decreases in thickness symmetrically radially away from the center so it will flex when tightened at room temperature and have residual force stored when hot to compensate the metals for thermal creep.

Abstract: Containers pass through a radiation beam projected from a beam source to a detector. The detector output pulse rates at points where the container has passed partially into the beam and partially out of the beam are detected. Pulse rates during a measuring interval which lies between these points are divided by time units from a clock pulse generator to produce a signal representative of the average pulse rate during the interval. This signal is compared to a selectable reference signal. If a comparison is made, the comparator yields a signal indicative of whether or not material in the container was at a high enough level to attenuate the beam.

Abstract: A power supply is switchable to apply a low kilovoltage and a relatively higher kilovoltage alternately to the anode of an X-ray tube that includes a filament and a control grid. A grid bias voltage generator uses an inverter driven in the kilohertz frequency range to feed the primary winding of a first transformer whose parasitic capacitance and inductance are used to produce a peak ac output voltage from the secondary of the first transformer at resonant frequency. The secondary output voltage is rectified and the resulting negative bias voltage is applied to the control grid synchronously with the high kilovoltage being applied to the anode so the X-ray tube current is then relatively low. A less negative or zero bias voltage is applied to the grid synchronously with the lower kilovoltage being applied to the anode so the X-ray tube current is then relatively high and substantially limited by the temperature and emissivity of the filament.

Abstract: A labeling machine has a rotor on which several oscillatingly driven pallet shafts are supported. Each shaft has a carriage shiftable transversely to the shaft axis. Glue pallets having partly cylindrical surfaces for being coated with glue are mounted to the carriage and are thereby movable from a radially outward position to a radially inward or neutral position for, respectively, contacting a glue roller and a label in a stack successively and for being retracted to neutral position out of the path of the roller and stack. The shafts have an enlarged central section which is rectangular in cross section and a complementarily shaped channel on a sleeve that carries the curved pallets is supported for sliding transversely to the pallet shaft axis.

Abstract: A joist girder construction includes connecting ties which connect adjacent ends of joist girders at a point where they are supported. The ties include a non-welded zone to afford plastic elongation of the tie. The ties create an axial connection force between the top chords to reduce the force a load causes within the joist girder to thus reduce the size of the upper and lower joist chords to minimize overall weight and expense.

Abstract: A skeletonized piston assembly in which a tube forms a piston shank and an enlarged thin disc has a peripheral edge which provides the piston skirt. A guide disc is spaced from the other disc and guides movement of the piston. Quick release fittings and a removable helical flight assembly adapt the heater for sanitary applications and easy clean-out.

Abstract: Floor treating apparatus, principally for waxing floors includes a drip pan to catch wax from the applicator pad when the applicator head is in a retracted position. A piston pump has an adjustable variable stroke to provide selection of the quantity of wax to be deposited. Slotted connections between the applicator head and the supporting arms provide independent vertical movement of each end of the applicator pad to enable the pad to conform to uneven floors.

Abstract: In a digital fluorography system a television (TV) camera converts x-ray images to analog video signals that are converted to digital pixel words in an analog-to-digital converter (ADC). The sync signals for the TV camera and the sample clock signals for the ADC are derived from a novel resettable crystal controlled sync generator. A phase-locked loop provides an ac reference signal at one-half power line frequency which is equivalent to TV frame rate. The sync generator is reset to start a new frame and an ensuing sequence of crystal controlled horizontal sync pulses only in response to occurrence of ac reference signals so every frame is in registration. A digital video processor (DVP) subtracts a mask image from each image in a sequence of images that are acquired while an x-ray contrast medium is appearing in and disappearing from a blood vessel. The resulting difference images are stored in analog video signal format in an analog video disk recorder.

Abstract: In a digital fluorography system a television (TV) camera converts X-ray images to analog video signals that are converted to digital pixel words in an analog-to-digital converter (ADC). The sync signals for the TV camera and the sample clock signals for the ADC are derived from a novel resettable crystal controlled sync generator. A phase-locked loop provides an ac reference signal at one-half power line frequency which is equivalent to TV frame rate. The sync generator is reset to start a new frame and an ensuing sequence of crystal controlled horizontal sync pulses only in response to occurrence of ac reference signals so every frame is in registration. A digital video processor (DVP) subtracts a mask image from each image in a sequence of images that are acquired while an X-ray contrast medium is appearing in and disappearing from a blood vessel. The resulting difference images are stored in analog video signal format in an analog video disk recorder.

Abstract: A continuously rotating rotor has pockets in its periphery for transporting bottles. The rotor operates next to two star-wheel conveyors rotating at lower peripheral speed and oppositely of the rotor. With each second pocket of the rotor is correlated a cam controlled slide member which gradually transfers the vessels at a first transfer point into the more slowly travelling pockets of the first star-wheel conveyor. The other pockets of the rotor lying therebetween have cam controlled clamps which bring each second bottle to a second transfer point whereby means of two stationary guide members it is gradually transferred into the more slowly traveling pockets of the second star-wheel conveyor. Between the pitch circles of the rotor pockets and the pitch circles of the star-wheel conveyors there is a space somewhat less than the bottle diameter. By transfer of the vessels from the rotor into the two star-wheel conveyors, a perceptible reduction of the conveyor speeds is possible.