JOHN H QUILTY
Broker in Wilmington, MA
License number
Massachusetts 68747
Issued Date
Mar 1, 1970
Expiration Date
May 3, 2001
Type
Broker
Address
Address
Wilmington, MA 01887
Professional information
Method Of Extending The Life Of A Cathode Ray Tube
US Patent:
4336478, Jun 22, 1982
Filed:
Apr 21, 1980
Appl. No.:
6/142584
Inventors:
John H. Quilty - Wilmington MA
Lawrence M. Scholten - Sudbury MA
Lawrence M. Scholten - Sudbury MA
Assignee:
Itek Corporation - Lexington MA
International Classification:
H01J 3110
US Classification:
313478
Abstract:
A luminous trace of varying length is produced upon a first non-centralized portion of the screen of a cathode ray tube used in a phototypesetter for generating characters, and is precisely imaged upon positions of a photosensitive medium. The concentration of the electron beam to generate the required trace eventually burns out the phosphor. The life of the tube is greatly extended by thereafter rotating it to position a second non-centralized portion of the screen at the optical projection axis, and so on, and thus, the cathode ray tube life is greatly extended.