Patents Examined by Stepehn J. Lechert, Jr.
  • Self centering underground mine lamp
    Patent number: 4450508
    Abstract: A mine lamp having an improved base structure and envelope that cooperate with the socket and lens of an underground miners head piece to maintain the lamp in a centered position relative to a reflector as the latter is manually adjusted relative to the lamp, and by so doing substantially increasing the light output from the head piece.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: May 22, 1984
    Inventor: James A. Carley