Patents by Inventor Norman A. Grabowski

Norman A. Grabowski 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: 5363694
    Abstract: A detection or safety system is disclosed for preventing leakage of harmful gases when fragile ampoules break during heating of components in crystal growth experiments. In the preferred embodiment, the system includes an inner silica ampoule to house the components and reaction product; an outer silica ampoule that encases the inner ampoule, leaving a gap between them; an inert gas (preferably neon) that is normally trapped in the gap; and a metal canister that houses or contains the ampoules. If the pressure becomes too great within the inner ampoule, during heating by the crystal growth furnace, both ampoules may break. If that occurs, the neon is released, where upon its presence is sensed by a thermal conductivity detector ("TCD"). The TCD then sends off a signal to a controller which shuts off the furnace power. The resulting decrease in temperature releases the pressure and prevents the canister from being breached.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: November 15, 1994
    Assignee: United Technologies Corporation
    Inventor: Norman A. Grabowski