Patents by Inventor Dennis D. Spaulding

Dennis D. Spaulding 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).

  • Lamp having interference-fit metallic bases
    Patent number: 5432400
    Abstract: A lamp including a glass envelope having a base fitted at each end portion thereof. Each lamp base includes a metallic base shell having an annular flange. The annular flange is heated prior to fitting over the end portion of the envelope so as to increase the inner flange diameter. Cooling of the annular flange after fitting reduces the flange diameter thereby providing an interference fit with the end portion. The lamp base is retained on the end portion without the need for basing cement. In order to accommodate variations in the diameter of the lamp seals, an annular rib is formed on the inner surface of the flange. After cooling, the annular rib forms an interference fit with the lamp end portion.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: July 11, 1995
    Assignee: GTE Products Corporation
    Inventors: Dennis D. Spaulding, Nicholas W. Brett
  • Method of despensing mercury into arc dishcharge lamp having capsule coated with low ionization energy material
    Patent number: 5278473
    Abstract: A method of dispensing mercury into an arc discharge lamp containing a mercury capsule adjacent one of the coil electrodes is disclosed. The method includes the step of preparing a solution of a low ionization energy material and coating at least a portion of the mercury capsule. Thereafter, the mercury dispensing capsule is bombarded with a directed stream of electrons produced by the other coil electrode of sufficient energy to rupture the capsule causing the mercury to be released. The coating focuses the directed stream of electrons directly on the capsule, thereby reducing the amount of time necessary to rupture the capsule.
    Type: Grant
    Filed: April 15, 1993
    Date of Patent: January 11, 1994
    Assignee: GTE Products Corporation
    Inventors: Ralph P. Parks, Jr., Kendrick D. Rattray, Dennis D. Spaulding
  • Method for manufacturing lamp having interference-fit metallic bases
    Patent number: 5254025
    Abstract: A method for manufacturing a lamp including a glass envelope having a base fitted at each end portion thereof. Each lamp base includes a metallic base shell having an annular flange. The annular flange is heated prior to fitting over the end portion of the envelope so as to increase the inner flange diameter. Cooling of the annular flange after fitting reduces the flange diameter thereby providing an interference fit with the end portion. The lamp base is retained on the end portion without the need for basing cement. In order to accommodate variations in the diameter of the lamp seals, an annular rib is formed on the inner surface of the flange. After cooling, the annular rib forms an interference fit with the lamp end portion.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: October 19, 1993
    Assignee: GTE Products Corporation
    Inventors: Dennis D. Spaulding, Nicholas W. Brett