Patents Assigned to Holtkotter International, Inc.
  • Patent number: 7294977
    Abstract: A system and related methods for operating a lamp. The system and method provide for ON/OFF control such that the light source illuminates in predefined steps and is reduced in predefined steps. Turning ON the light source may include powering the light source in one step from zero light to a first light level that is less than a maximum light level and powering the light source gradually over a first predetermined time period from the first light level to a second light level greater than the first light level. Turning OFF the light source may include powering the light source in one step from a third light level at or below the maximum light level to a fourth light level that is less than the third light level and powering the light source over a second predetermined time period from the fourth light level to zero light.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: November 13, 2007
    Assignee: Holtkotter international, Inc.
    Inventors: Paul Wilhelm Eusterbrock, Paul Rops, Mark Tellier
  • Patent number: 6196703
    Abstract: A control system is provided for use in conjunction with a lighting fixture which will provide additional safety by avoiding the risk of fire. The safety system provides a number of sensors which are capable of detecting the presence of objects in close proximity to the lighting element and appropriately switching power off when such objects are detected. The actual detection is accomplished by use of a plurality of infrared sensors which create an infrared shield around the bulb of the lighting fixture and insure no objects intrude upon the shielded space while the lighting system is in operation. A second safety benefit is provided by the use of a tilt switch. The tilt switch cuts off power to the lamp if the lamp is tipped or knocked over.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: March 6, 2001
    Assignee: Holtkotter International, Inc.
    Inventors: Paul W. Eusterbrock, Francis W. Camps
  • Patent number: 5921661
    Abstract: A control system is provided for use in conjunction with a lighting fixture which will provide additional safety by avoiding the risk of fire. The safety system provides a number of sensors which are capable of detecting the presence of objects in close proximity to the lighting element and appropriately switching power off when such objects are detected. The actual detection is accomplished by use of a plurality of infrared sensors which create an infrared shield around the bulb of the lighting fixture and insure no objects intrude upon the shielded space while the lighting system is in operation.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: July 13, 1999
    Assignee: Holtkotter International, Inc.
    Inventors: Paul W. Eusterbrock, Bernd Swolinski, Willi Brinkmann
  • Patent number: D401004
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: November 10, 1998
    Assignee: Holtkotter International, Inc.
    Inventor: Paul W. Eusterbrock
  • Patent number: D401377
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: November 17, 1998
    Assignee: Holtkotter International, Inc.
    Inventor: Paul W. Eusterbrock