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:
Jan. 19, 1982
Filed:
Jun. 04, 1979
S Merrill Skeist, Brookville, NY (US);
Leo Gross, Bayside, NY (US);
Spellman High Voltage Electronics Corp., Plainview, NY (US);
Abstract
A compact fluorescent lamp with a screw-in plug to fit conventional screw sockets which operates at 20-30 watts and provides the lumen output of a 75-100 watt lamp. The lamp is essentially a hollow cylinder with a glass envelope for the two outer walls. The space between the two outer walls is partitioned to constrain the arc discharge to follow a designated path around the inner surface of the lamp. Efficiency is promoted by novel ballast design. The screw-in fluorescent lamp contains a coil in the center of the lamp which creates a diverging magnetic field which causes the arc discharge to spread and may also serve the dual purpose of limiting arc current. Arc spreading coils of several designs are disclosed to provide oriented diverging magnetic fields, rotating diverging magnetic fields and magnetic fields shaped to the lamp envelope with which they are employed.