Patents by Inventor Edmund R. Kern

Edmund R. Kern 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).

  • High efficiency sealed beam reflector lamp
    Patent number: 5493170
    Abstract: A reflector lamp having a lens of vitreous material fused to a reflector body of vitreous material. An inner reflector surface of the reflector body includes a reflective coating having a first coating portion extending from the rim of the reflector body and a second coating portion extending from a location spaced from the rim towards a basal end of the reflector body. The second coating portion is a layer of silver and the first coating portion is a layer of material other than silver, such as aluminum, having a higher resistance to damage by high heat in the rim area during fusing of the lens to the reflector body. Higher efficacies are achieved with the silver layer spaced from the rim than with silver covering the entire reflector surface.
    Type: Grant
    Filed: September 9, 1994
    Date of Patent: February 20, 1996
    Assignee: Philips Electronics North America Corporation
    Inventors: Jack R. Sheppard, David R. Woodward, James A. Cinalli, Douglas W. Shriver, Walter A. Boyce, Edmund R. Kern
  • Composite vacuum evaporation coil
    Patent number: 4939411
    Abstract: A composite vacuum evaporation coil including a base coil and an overwind coil is characterized by the overwind coil being independent of the power source and being confined to the area of the turns of the base coil. Such a composite coil has improved efficiency and operating life.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: July 3, 1990
    Assignee: North American Philips Corporation
    Inventor: Edmund R. Kern
  • Emissive coating for electrodes
    Patent number: 4031426
    Abstract: An electron emissive coating for long life fluorescent lamps comprises a composition of barium tantalate having the formula M(BaO) . N(Ta.sub.2 O.sub.5) where the ratio M/N is greater than 1.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: June 21, 1977
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Edmund R. Kern
  • Electric discharge tube having variable electrode area
    Patent number: 4024423
    Abstract: An electric discharge tube comprising wire probes located close to the electrodes for collecting electrons, and bimetallic support for each wire probe to vary in response to operative temperature, the distance of the wire probe from the electrode.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: May 17, 1977
    Assignee: North American Philips Corporation
    Inventor: Edmund R. Kern
  • Method of treating electron emissive cathodes
    Patent number: 3969279
    Abstract: Firing electron emissive compounds of barium tantalate in excess of 1600.degree.C in controlled vacuum conditions removes elemental barium from the compound. The method provides improved fluorescent lamp quality by yielding substantially less end discoloration over the life of the lamps.
    Type: Grant
    Filed: August 13, 1974
    Date of Patent: July 13, 1976
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Edmund R. Kern
  • Method for preparing emissive coating for electrodes
    Patent number: 3953376
    Abstract: An electron emissive coating for long life fluorescent lamps comprises a composition of barium tantalate having the formula M(BaO) . N(Ta.sub.2 O.sub.5) where the ratio M/N is greater than 1.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: April 27, 1976
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Edmund R. Kern
  • Method for preparing electron emissive coatings
    Patent number: 3951874
    Abstract: An improved emissive tantalate coating for fluorescent lamps provides long operational lamp life and low lamp end discoloration. The emissive tantalate has the composition Ba.sub.5 Ca.sub.4 Ta.sub.2 O.sub.14 and is applied in powder form to standard fluorescent lamp electrodes.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: April 20, 1976
    Assignee: International Telephone and Telegraph Corporation
    Inventor: Edmund R. Kern