Patents Assigned to Calculagraph Co.
  • Patent number: 5671841
    Abstract: A switching mechanism comprising a housing, a spring, first and second movable contacts mechanically attached to the spring, first and second substantially fixed contacts attached to the housing, and an actuator is provided. The spring comprises first and second edges substantially fixed to the housing. In a rest position the first and second movable contacts do not electrically contact the first and second substantially fixed contacts, respectively. The actuator centrally actuates the spring to cause the first and second movable contacts to move in the same direction as the central portion of the spring and to electrically contact the first and second substantially fixed contacts.The spring is preferably a snap spring shaped in the form of a cross comprising a column member and first and second protruding wings. The first and second movable contacts are preferably mechanically and electrically connected to the first and second protruding wings respectively.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: September 30, 1997
    Assignee: Calculagraph Co.
    Inventor: Richard Owen Glasson