Patents by Inventor Mark E. Preston

Mark E. Preston 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: 5977527
    Abstract: A fixture for an induction brazing station includes a removable front plate on which is mounted a work piece holder. The base of the induction unit mounts to a back plate lying coplanar with the front plate on the work surface. The coil of the induction unit is uniquely matched to the front plate and the work piece holder. The induction coil removably mounts to the front plate when not in use such that the front plate may be removed from the work surface with the work piece holder and coil mounted thereon. A different front plate may then be mounted upon the work surface having a different coil configuration and work piece holder. The coil(s) are removed from the front plate and attached to the induction base on the back plate. The coil extends to the work piece holder on the front plate in the correct position. The invention provides for quick changeover between different induction units at a single work station.
    Type: Grant
    Filed: May 15, 1998
    Date of Patent: November 2, 1999
    Assignee: Bausch & Lomb Incorporated
    Inventors: Mark E. Preston, Ronald D. Spoor, Bruce F. Westphal, Tadeusz Urbanowicz
  • Patent number: 5152231
    Abstract: A fire-resistant safe has a main body and a closure, both of which are formed from integral resin shells filled with insulation materials. When exposed to fire, a portion of the resin material burns away leaving gaps between the insulation materials of the main body and closure. However, formation of convection air currents in vertical sections of the gaps is resisted by reducing spacings between insulation materials of the main body and closure. The amount of heat energy carried by the convection air currents is similarly reduced, thereby avoiding significant concentrations of heat that can promote burning through the gaps.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: October 6, 1992
    Assignee: John D. Brush & Co., Inc.
    Inventors: Mark E. Preston, Eugene S. Stephens