Patents Represented by Attorney Drew S. Hamilton
  • Patent number: 4427292
    Abstract: A computer controlled microfilm camera system and method for microfilming data onto pre-cut individual microfiche film sheets in one of a plurality of formats selected by a system user. The camera system includes a reusable cartridge which permits the single microfiche film sheet to be substantially withdrawn and exposed, and then reinserted into the cartridge for processing in a daylight loading processor. The cartridge is supported on a movable carriage assembly which is connected to a first drive system and stepping motor so as to provide for translation of the film sheet in a column direction. The carriage assembly supports a second drive system and stepping motor which is connected so as to provide for translation of the film sheet in a row direction.
    Type: Grant
    Filed: April 28, 1982
    Date of Patent: January 24, 1984
    Assignee: Microsize, Inc.
    Inventor: Vernon G. Buchanan
  • Patent number: 4422939
    Abstract: A blood and perfusate filter apparatus having a pair of molded housing members that are substantially identical in their configuration. The upper housing member having a pyramidal-shaped reservoir formed in the upper surface thereof which acts as a secondary distribution reservoir, and the lower housing member having a pyramidal-shaped reservoir formed in the lower surface thereof which acts as a secondary collection reservoir. Interchangeable tubing couplings are press-fit bonded to inlet/outlet ports located in the secondary reservoirs. A filter element, mounted in a resinous band, is bonded between the housing members so as to filter blood or perfusate as it passes through the filter. The filter element also forms primary distribution and collection reservoirs with respect to the upper and lower housing members. Different types of filter configurations, such as flat or pleated, can be mounted in a resinous band and used as the filter media.
    Type: Grant
    Filed: April 8, 1982
    Date of Patent: December 27, 1983
    Assignee: Texas Medical Products, Inc.
    Inventors: Russell G. Sharp, William R. Wilkinson, Charles C. Reed, Denton A. Cooley
  • Patent number: 4383917
    Abstract: An apparatus is provided for classifying and separating larger or more dense particles from fine particulate material entrained in a stream of air. The apparatus has a helically-shaped air chamber with a truncated frusto-conically shaped circumferential periphery. A series of extraction ports are disposed at spaced intervals along the truncated apex of the periphery. An adjustable blade means disposed at each extraction port segregates the outer fraction of particles from the air stream and diverts it into an extraction chamber surrounding the extraction port. The extraction chamber is pressurized to prevent the outflow of air from the helically-shaped air chamber through the extraction port and to remove the extracted particles to a collection point for further processing.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: May 17, 1983
    Assignee: University of Utah
    Inventor: Howard M. Wells
  • Patent number: 4376647
    Abstract: A process for removing sulfur from sulfide-bearing ores by reacting water vapor with the sulfide-bearing ore forming hydrogen sulfide while simultaneously regenerating water vapor by reacting the hydrogen sulfide with lime. Advantageously, the process occurs in the absence of a net consumption or production of gaseous species so that the process can be carried out in a closed system with respect to the gaseous species. Sulfide-bearing ores which can be treated using the process of this invention include sulfide-bearing ores of molybdenum, zinc, iron, mercury, and copper. Advantageously, the molybdenum oxide so produced from the sulfide-bearing ore of molybdenum can be reacted further with lime and water producing calcium molybdate and hydrogen. The chalcopyrite form of the sulfide-bearing ore of copper produces bornite and magnetite.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: March 15, 1983
    Assignee: University of Utah
    Inventor: Hong Y. Sohn
  • Patent number: 4373156
    Abstract: A system and method for producing rapid, high resolution hard color copies from computer-based graphics and image processing including a computer-controlled color video signal graphics system for producing electronically generated digital character and/or graphics data in response to programmed commands that are input to the graphics system. Thereafter, the graphics system transforms the digital data into blue, green and red color video signals which are input to a color camera system through a color control panel that is controlled by a microprocessor. The color control panel sequentially switches each of the red, blue and green video signals through to a video monitor where the signals are transformed into video images on a screen of the monitor. The video images appearing on the screen of the monitor are filtered by a color filter wheel which is also controlled by the microprocessor of the camera system. One of two types of film may be selected for exposure to the filtered video images.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: February 8, 1983
    Assignee: Bell & Howell Company
    Inventors: Robert B. Pfannkuch, Fred W. Grab
  • Patent number: 4345919
    Abstract: A device and method for its use in medical transfusion or bypass circuits wherein biological fluids, such as blood, are introduced onto the interior surface of an essentially cylindrical cavity in a vortical flow such that unwanted gas bubbles are separated from the biological fluids. The degassed biological fluids are collected and returned to the patient.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: August 24, 1982
    Assignee: Texas Medical Products, Inc.
    Inventors: William R. Wilkinson, Russell G. Sharp, Charles C. Reed, Denton A. Cooley, Terry N. Crane
  • Patent number: 4335729
    Abstract: A novel apparatus and method for suppressing unwanted resonance in an electromanometry system. The apparatus includes a compliant air cavity connected through a variable impedance device which is coupled in parallel to the liquid-filled catheter of the electromanometry system. By varying the hydraulic impedance through which the compliant air cavity is coupled to the system, precise impedance matching capability is provided over a wide range of hydraulic impedance values, thereby permitting suppression of unwanted resonance and improved frequency response of recorded waveforms in a wide variety of catheter-transducer systems.
    Type: Grant
    Filed: March 11, 1980
    Date of Patent: June 22, 1982
    Assignee: Sorenson Research Co., Inc.
    Inventors: Gordon S. Reynolds, Robert J. Todd
  • Patent number: 4334476
    Abstract: A cylindrical primer cup having a top end which may be sealed so as to safely contain granular or liquid explosive matter is disclosed. A cylindrical conduit extends in a straight path through the cup, providing an opening at either end permitting through-passage of detonating cord or blasting caps. The cylindrical conduit additionally has a fixed diameter throughout, facilitating its travel along a detonating cord. A frustoconical conduit extends well within the primer cup for the placement and frictional retention of blasting caps therein. The sidewalls of the two conduits are relatively thin to provide for easier primer detonation. Symmetrically placed columnar-shaped ribs provide longitudinal structural support for the cylindrical conduit.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: June 15, 1982
    Assignee: Mining Services International Corporation
    Inventors: John T. Day, Lex L. Udy
  • Patent number: 4305470
    Abstract: A power hoe for working soil. The power hoe includes a drive shaft contained inside a housing and driven by an electric hand drill. A drive pin mounted to a drive plate at the end of the drive shaft is inserted into a piston housed in a sleeve. The piston is allowed to slide back and forth within the sleeve thus allowing the rotational motion of the drive pin to be translated to harmonic reciprocating motion at the sleeve in a direction perpendicular to the path of the moving piston. The sleeve is attached to a cutting head, thus causing the cutting head also to reciprocate. The cutting head can be adjusted so as to change the length of the stroke; the speed of the stroke varies with the speed of the hand drill. A curved cutting edge on the blade of the cutting head compensates for the arc of the blade as it reciprocates, allowing for more efficient working of the soil.
    Type: Grant
    Filed: October 19, 1979
    Date of Patent: December 15, 1981
    Inventor: Elbert J. Anderson
  • Patent number: 4298093
    Abstract: An adjustable sawhorse having a work platform removably mounted atop two pairs of side rails. A pair of hinges connect the side rails of each side rail pair at one end thereof. The hinges may be selectively locked or unlocked to accommodate folding and unfolding of the sawhorse from a folded configuration to an upright configuration and vice versa. Each pair of side rails is also slidably mounted on another pair of side rails to accommodate extension thereof. Locking handles are provided for each extensible set of side rails so that they may be locked into one or more extended positions. Steps are mounted between each pair of side rails to enhance the versatility and use of the sawhorse.
    Type: Grant
    Filed: November 16, 1978
    Date of Patent: November 3, 1981
    Assignee: Little Giant Industries, Inc.
    Inventor: Harold R. Wing
  • Patent number: 4289064
    Abstract: An automated cooker for sandwiches and the like. The automated cooker includes a pair of heating elements spaced one from the other so as to provide passage therebetween. A motor drives a conveyor which carries a plurality of individual sandwich holders through the passage between the heating elements. Each sandwich holder consists of a handle which can be attached to the conveyor and a top portion which encloses the sandwich to be cooked. A bar is placed below the heating elements and extends along the length of the cooker. The bar is used to trigger a switch which activates the heating elements and which turns on a motor that drives the conveyor. The bar may be activated by the handle of any sandwich holder placed on the conveyor. The bar is deactivated so as to turn off the heating elements and the motor which drives the conveyor when the handle of the last sandwich holder reaches a notch placed in the end of the bar.
    Type: Grant
    Filed: July 24, 1980
    Date of Patent: September 15, 1981
    Inventor: Stephen L. Rosenblatt
  • Patent number: D264022
    Type: Grant
    Filed: April 18, 1979
    Date of Patent: April 27, 1982
    Inventor: Philip B. Wayman
  • Patent number: D270504
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: September 13, 1983
    Inventor: Devere P. Kent
  • Patent number: D270505
    Type: Grant
    Filed: August 1, 1980
    Date of Patent: September 13, 1983
    Inventor: Devere P. Kent