Patents Assigned to John Ott Laboratories, Inc.
  • Full-spectrum luminaire
    Patent number: 4091441
    Abstract: An improved full-spectrum luminaire utilizing a plurality of gas discharge lamps at least one of which produces radiant energy primarily in the near-ultraviolet range and another produces radiant energy primarily in the visible range. The spectral energy distribution characteristics of the lamps are chosen so that their combined radiation simulates natural daylight in both the ultraviolet and visible light ranges. The ultraviolet radiation may be switched off manually or automatically.
    Type: Grant
    Filed: November 4, 1977
    Date of Patent: May 23, 1978
    Assignee: John Ott Laboratories, Inc.
    Inventor: John Nash Ott
  • Apparatus for operating gaseous discharge lamps on direct current from a source of alternating current
    Patent number: 4004184
    Abstract: A system providing flickerless operation of a gaseous discharge lamp utilizes a DC voltage applied across the lamp electrodes. Low starting voltage and power consumption are obtained by applying an AC voltage across a grounded conductor member and adjacent lamp electrodes. This is a division of application Ser. No. 443,825, filed Feb. 19, 1974, now U.S. Pat. No. 3,890,540.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: January 18, 1977
    Assignee: John Ott Laboratories, Inc.
    Inventor: Henry Whitfield Ott
  • Filtered fluorescent lamp
    Patent number: 3947719
    Abstract: A light filtering system for improving the spectral output from fluorescent lamps. A filter placed within the lamp envelope between the phosphor coating and the arc discharge path between the lamp electrodes, absorbs mercury arc radiation in the visible range while passing arc radiation in the ultraviolet range to excite the phoshor coating and produce visible light emitted through the outer envelope.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: March 30, 1976
    Assignee: John Ott Laboratories, Inc.
    Inventor: John Nash Ott