Patents by Inventor Albert Edwin Bryan

Albert Edwin Bryan 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: 8152111
    Abstract: A railroad switch point indicator comprising a mounting plate mountable to a railroad switch point, a tubular housing mounted to the mounting plate, a piston slidably disposed in the housing and extendable to variably engage an associated railroad rail, a bias spring operatively connected to the piston for biasing the piston in an axial direction with respect to the housing and the railroad switch point, and a signal mechanism operatively connected to the piston for indicating the positional status of the switch point via an attitude of a signal flag. When the switch point is engaged with a rail, the flag is in a first attitude. When the switch point is disengaged from the rail, the flag is in a second attitude. When the switch point is positioned incorrectly, i.e., damaged, the flag may be in a third attitude intermediate between the first and second attitudes, indicating alarm.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: April 10, 2012
    Inventor: Albert Edwin Bryan