Patents Represented by Law Firm Drummond, Nelson, & Ptak
  • Patent number: 3987546
    Abstract: A prosthetic denture is disclosed. The denture includes an assembly of hard acrylic teeth bonded to a "semi-hard" acrylic base member. The base member is formulated from an acrylic polymer blend to yield preselected characteristics including hardness and thermal deformability so that fitting adjustments to conform to the wearer and to insure occlusive harmony can be accomplished with facility.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: October 26, 1976
    Inventor: Daniel E. Trampe
  • Patent number: 3988021
    Abstract: A game table is disclosed having a support structure including leg assemblies at either end supporting the table. The leg assemblies include a first member pivotally attached to the table along the longitudinal axis of the table and a second member pivotally attached to the first and to a caster pedestal. The pedestals are interconnected by an adjustable rod which can be extended and retracted to level, raise and lower the table. Adjustable braces extend between the tabletop and the pedestals. The tabletop can be pivoted to a generally vertical position thereby facilitating movement and storage of the table when not in use.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: October 26, 1976
    Inventor: Douglas B. Grover
  • Patent number: 3980242
    Abstract: An annular core holder form supports in rotatable fashion a toroidal core in connection with a pair of fixed support members to comprise a core holder assembly for winding wire coils on the core through the action of a revolving wire-carrying shuttle of a coil winding machine. The core holder form is intergally wound to the core through the wrapping action of the shuttle and is removable with the core. The pair of support members and the holder form have generally central first openings extending axially therethrough to permit the shuttle to thread the core, support members and holder form in order to wind the wire coils axially about the annular wall of the core. The support members have respective second openings communicating with the first openings and which are aligned with each other to permit the passage of a winding wire strand.
    Type: Grant
    Filed: April 29, 1974
    Date of Patent: September 14, 1976
    Assignee: Quasar Electronics Corporation
    Inventor: Hans Schmidt
  • Patent number: 3977291
    Abstract: A digital keying system for an electronic organ comprises a voltage divider network consisting of weighted value resistors switched into or out of the circuit by corresponding switches. The network is connected to a tone signal output terminal, and a reversible counter is connected to control the states of conduction of the switches. Closure of a key-operated switch causes clock pulses from an attack clock pulse source to be applied to the reversible counter to selectively control the operation of the switches to shape the attack waveform of tone signals appearing on the output terminal as determined by the pattern of operation of the switches. Upon release of the key, clock pulses from a decay clock generator are applied to the counter to operate it in the reverse direction, establishing a decay envelope for the tone signal in accordance with the pattern of operation of the switches.
    Type: Grant
    Filed: August 13, 1974
    Date of Patent: August 31, 1976
    Assignee: C. G. Conn, Ltd.
    Inventor: James S. Southard
  • Patent number: 3973228
    Abstract: An electronic tuner control system particularly adapted for television receivers employs a gated oscillator for sequentially stepping the tuner from one channel selection to the next. The system includes a counter responsive to the gated oscillator for causing the sequential scanning or stepping to take place in either the "up" or "down" direction. Separate tuning potentiometers are associated with each channel and are selected in sequence under control of the counter. Each potentiometer is set to either a first range of settings indicative of a valid tuning voltage for that channel or to a second range indicating that no tuning or channel selection is to be effected for such a second or "non-preferred" setting. All of the tuning potentiometers are coupled to an analog steering circuit comprised of isolating diodes, and only one potentiometer at a time is selected to apply a tuning voltage to the output of the steering circuit under control of the counter.
    Type: Grant
    Filed: September 4, 1974
    Date of Patent: August 3, 1976
    Assignee: Quasar Electronics Corporation
    Inventors: David J. Mueller, Hugh F. Bonney
  • Patent number: 3968590
    Abstract: An insect trap including a cover assembly having a central projecting mounting hub and a disposable panel releasably engageable with the hub. The panel is coated with an appropriate trap substance which entangles the insects. Flexible mounting fingers are carried on the interior of the hub to frictionally secure the trap in an operative position on a stalk, branch, or other similar object.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: July 13, 1976
    Assignee: Wilbur-Ellis Company
    Inventor: Roger L. Kitterman
  • Patent number: 3960735
    Abstract: The tendency of polyphosphate liquids to corrode aluminum is inhibited by incorporating into the liquid a minor effective amount of an iron cyanide blue, either ferric ferrocyanide or ferrous ferricyanide.
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: June 1, 1976
    Assignee: Early California Industries, Inc.
    Inventor: Kathleen P. Lacey
  • Patent number: 3951384
    Abstract: A deformable elongate upright hollow cylindrical body is formed by a plurality of concentrically stacked tire casings which are bound together by cables. Retaining anchors, each having an eye encircling one of the cables, holds the cylindrical body in a predetermined position to function as a vehicle barrier. Used, empty crushable containers within the hollow body provide additional energy absorption. A barricade wall is fabricated from several deformable bodies, each in tangential contact and secured by additional cables.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: April 20, 1976
    Inventor: Robert E. Hildreth, Jr.
  • Patent number: RE28999
    Abstract: A rhythm system includes a memory for storing rhythm patterns, with a plurality of sections for controlling individual rhythm instruments, and instrument generators for producing sounds in accordance with the patterns. The patterns are stored in memory lines, with the number of counts in the patterns differing from one pattern to another. A plurality of short rhythm patterns can be stored on a single memory line. The system includes pushbutton switches for selecting the particular rhythm patterns and automatically selects the proper clock frequency for timing the selected rhythm pattern. The system is automatically reset at the end of the pattern and can selectively reset at the beginning of an intermediate position in the memory line, as required when a plurality of rhythms are stored in sequence on a single line. The system can also provide a special rhythm, such as a drum break, and this can be inserted during the playing of a selected continuous rhythm.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: October 12, 1976
    Assignee: C. G. Conn, Ltd.
    Inventor: James S. Southard