Patents by Inventor Albert R. Pratt

Albert R. Pratt has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4243285
    Abstract: A combination clamp and plug type electrical connector comprising a longitudinally extended pair of electrically conductive jaws mounted for relative pivotal movement and protruding from a dielectric sleeve having slidably supported therein resilient means for adjustably exerting an inwardly directed pressure on the jaws to maintain a clamping electrical contact with an interposed conductor, or for adjustably exerting an outwardly directed pressure on the jaws to maintain electrical contact with conductive wall portions of an electrical receptacle.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: January 6, 1981
    Assignee: Raytheon Company
    Inventors: Charles F. Crowley, Albert R. Pratt
  • Patent number: 4201096
    Abstract: A knob assembly comprising a cup-shaped knob shell having therein a coaxial pair of oppositely wound coil springs disposed for binding engagement with a surrounding wall of a race and having respective terminal end portions engaging an encircled portion of an axially rotatable bushing which is provided with fastening means for rotatably engaging an axially inserted shaft, the springs having other terminal end portions engaged by respective oppositely rotatable lever arms mounted on the bushing and having end portions aligned with axially spaced projections of the knob shell, whereby axial movement of the shell causes the projections to pivot the lever arms in opposite angular directions to release the coil springs windingly from binding engagement with the wall of the race and permit rotation of the bushing and engaged shaft in response to rotary movement of the knob shell.
    Type: Grant
    Filed: December 19, 1977
    Date of Patent: May 6, 1980
    Assignee: Raytheon Company
    Inventors: Raymond C. Morrison, Albert R. Pratt
  • Patent number: 4132129
    Abstract: A push-to-turn knob assembly comprising a tubular hub disposed for attachment to an axially inserted end portion of a rotatable shaft and having a slotted end portion releasably engaged by a plurality of resiliently biased wedges annularly spaced apart within an encircling race, the hub and race being enclosed by an axially movable knob shell having projection means for disengaging the wedges from the hub and having keying means for engaging the hub and rotating the attached shaft to a desired setting.
    Type: Grant
    Filed: June 3, 1977
    Date of Patent: January 2, 1979
    Assignee: Raytheon Company
    Inventor: Albert R. Pratt
  • Patent number: 4049097
    Abstract: A push-to-turn knob assembly comprising a fixed race suitably disposed for encircling a rotatable shaft and having therein alternate pairs of resiliently spaced rollers which bindingly engage adjacent projections of an axially disposed cam cylinder, and interposed arcuate portions of a releasing disc which is rotatably maintained in the race by an overlying annular shoulder of the cam cylinder, the releasing disc having an outwardly extending flange wherein a plurality of slots are disposed in alignment with respective keys attached to an enclosing wall of a resiliently positioned knob shell.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: September 20, 1977
    Assignee: Raytheon Company
    Inventor: Albert R. Pratt
  • Patent number: 4036079
    Abstract: A brake lock knob assembly comprising a bushing disposed to bindingly engage an axially inserted shaft end portion and having a first frictional brake surface disposed in releasable resilient engagement with a second frictional brake surface of an adjacent nonrotatable member, and an axially movable knob shell having an inwardly projecting portion disposed to disengage the brake surfaces and having interlocking means for rotatably engaging the bushing.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: July 19, 1977
    Assignee: Raytheon Company
    Inventor: Albert R. Pratt