Patents by Inventor Norman A. Millman

Norman A. Millman 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: 5481890
    Abstract: A field conversion means to convert a knob-handle cylindrical lockset either with or without a key cylinder, installed in a door, to a lever-handle cylindrical lockset without changing any existing original key cylinder. The conversion means comprises an inside and an outside means, each including a lever-handle, a drive cartridge adaptor cylinder and a rosette or escutcheon containing a helical spring and a positive stop disk. The spring is biased to oppose droop of said lever-handle from a normal horizontal position and to oppose downward operating force, applied to said lever-handle and is increasingly biased when the lever is operated to oppose downward rotation of the lever. Stop means are provided in the rosette or escutcheon to limit the angular rotational travel of said lever-handle. Differently sized adapters are provided to permit the conversion of different sized cylindrical locks.
    Type: Grant
    Filed: March 11, 1993
    Date of Patent: January 9, 1996
    Inventor: Norman A. Millman
  • Patent number: 5072977
    Abstract: A latch retraction device for narrow stile doors which may be hinged either on the left side or on the right side, and which utilizes a push or pull actuator for retracting the latch instead of utilizing a rotary knob for that purpose. The device utilizes inter-engaged toothed elements to provide linear to rotary motion in a novel configuration of parts which permits one set of parts to be utilized to provide either a push or a pull actuation for latch retraction with either a right hand or left hand door and thereby eliminating the necessity to manufacture and inventory a large number of parts to accommodate all four types of desired uses.
    Type: Grant
    Filed: July 29, 1991
    Date of Patent: December 17, 1991
    Assignee: Trans-Atlantic Company
    Inventors: Norman A. Millman, Fouad F. Korban