The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2019
Filed:
Feb. 25, 2016
Applicant:
Profoto Ab, Sundbyberg, SE;
Inventors:
Assignee:
PROFOTO AB, Sundbyberg, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 15/05 (2006.01); H01T 1/22 (2006.01); H01T 1/24 (2006.01); H01J 11/28 (2012.01); H05B 41/32 (2006.01); H01J 61/54 (2006.01); H01J 61/90 (2006.01); H01J 1/30 (2006.01); H01J 61/067 (2006.01);
U.S. Cl.
CPC ...
G03B 15/05 (2013.01); H01J 1/30 (2013.01); H01J 11/28 (2013.01); H01J 61/0672 (2013.01); H01J 61/547 (2013.01); H01J 61/90 (2013.01); H01T 1/22 (2013.01); H01T 1/24 (2013.01); H05B 41/32 (2013.01); G03B 2215/0575 (2013.01); G03B 2215/0578 (2013.01);
Abstract
Flash tubes for photographic use, in particular, a flash tube is adapted to provide a light output adapted to FP-sync, Flat Peak. The flash tube includes a length of glass tubing enclosing a gas for use in the flash tube, a cathode inside a first end part of glass tubing and an anode inside a second end part of glass tubing. The cathode includes an element that helps to ionize the gas that is wound around the cathode, such that a spark stream starts from the upper part of the cathode and is prevented from spreading down wards on the cathode and changing the arc length during the light output adapted to FP-sync.