Patents by Inventor David Miller MacPherson

David Miller MacPherson 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: 6363636
    Abstract: An electric fireplace is provided having an improved flame simulating apparatus. In one aspect, the flame simulating apparatus includes a light source, a flame effect element for reflecting light to produce a flame effect, and a flicker element having reflective strips for reflecting light from the light source for subsequent reflection by the flame effect element. A screen having a partially reflecting surface and a diffusing member is positioned with the flame effect element extending proximate to the diffusing member. A fuel bed is positioned immediately adjacent to the partially reflecting surface of the screen to produce an image of the fuel bed on the screen with the image of moving flames appearing to emanate between the fuel bed and its reflected image. An alternate screen is provided having a non-planar diffusing member which causes the image of moving flames to appear to emanate from behind the reflected image the fuel bed.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: April 2, 2002
    Assignee: Dimplex North America Limited
    Inventors: Kristoffer Hess, David Miller MacPherson, Ignazio Gallo, Sean David Spencer
  • Patent number: 6269567
    Abstract: A simulated fireplace assembly is provided having a simulated fuel bed and a screen for transmitting an image of a flame. The simulated fuel bed is located adjacent to the screen. The screen has a first region that is sufficiently reflective to reflect the fuel bed and a second region that is sufficiently non-reflective to avoid reflection of ambient subject matter that is not associated with the fireplace assembly.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: August 7, 2001
    Assignee: Dimplex North America Limited
    Inventors: David Miller MacPherson, Kristoffer Hess, Ignazio Gallo, Sean David Spencer
  • Patent number: 6050011
    Abstract: An assembly is provided for producing an illusory effect. The assembly comprises a substantially transparent front wall having a rear surface and a front surface. A reflective surface is spaced from and faces the rear surface of the front wall. A plurality of first dots are disposed on the front wall in a sufficiently constant density over a given area to produce a substantially constant tinted appearance to the front wall when observed through the front surface. A plurality of second dots are disposed on the first dots and face the reflective surface, the second dots being smaller than the first dots. An image is defined by the second dots wherein the image is substantially invisible to an observer looking through the front surface other than as a reflected image in the reflective surface.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: April 18, 2000
    Assignee: Dimplex North America Limited
    Inventors: Kristoffer Hess, David Miller MacPherson, Ignazio Gallo, Sean David Spencer
  • Patent number: 6047489
    Abstract: An electric fireplace is provided having an improved flame simulating apparatus. The flame simulating apparatus includes a light source, a flame effect element for transmitting light from the light source to produce a flame effect, and a flicker element having colored reflective strips for reflecting light for subsequent transmission by the flame effect element. A screen having a partially reflecting surface and a diffusing surface is positioned with the flame effect element extending proximate to the diffusing surface. A fuel bed is positioned immediately adjacent to the partially reflecting surface of the screen to produce an image of the fuel bed on the screen with the image of moving flames appearing to emanate between the fuel bed and its reflected image.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: April 11, 2000
    Assignee: Dimplex North America Limited
    Inventors: Kristoffer Hess, David Miller MacPherson, Ignazio Gallo, Sean David Spencer
  • Patent number: 5642580
    Abstract: An electric fireplace is provided having an improved flame simulating apparatus. The flame simulating apparatus includes a light source, a flame effect element for transmitting light from the light source to produce a flame effect, and a flicker element having colored reflective strips for reflecting light for subsequent transmission by the flame effect element. A screen having a partially reflecting surface and a diffusing surface is positioned with the flame effect element extending proximate to the diffusing surface. A fuel bed is positioned immediately adjacent to the partially reflecting surface of the screen to produce an image of the fuel bed on the screen with the image of moving flames appearing to emanate between the fuel bed and its reflected image.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: July 1, 1997
    Assignee: Dimplex North America Limited
    Inventors: Kristoffer Hess, David Miller MacPherson, Ignazio Gallo