US 5,144,202 C1 (6101st)
HIGH-FREQUENCY POWER SUPPLY FOR INCANDESCENT LAMP
Ole K. Nilssen, Caesar Dr., Barrington, Ill. 60010
Reexamination Request No. 90/007,669, Aug. 16, 2005.
Reexamination Certificate for Patent 5,144,202, issued Sep. 1, 1992, Appl. No. 741,575, Aug. 7, 1991.
Continuation of application No. 07/548,197, filed on Jul. 5, 1990, now Pat. No. 5,083,255, which is a continuation of application No. 06/667,691, filed on Nov. 2, 1984, now abandoned, which is a continuation-in-part of application No. 06/487,817, filed on Apr. 22, 1983, now Pat. No. 4,506,318.
Int. Cl. H02M 7/5383; H05B 39/00;39/04;41/00 (2006.01)
U.S. Cl. 315—151
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
Claims 1-20 are cancelled.
[1. An arrangement comprising:
a source providing a relatively low-frequency AC power line voltage at a pair of power line terminals;
incandescent lamp havign a pair of lamp terminals; and
power supply connected between the power line terminals and the lamp terminals; the power supply being operative to provide a relatively high-frequency AC lamp voltage across the lamp terminals; the AC lamp voltage having: (i) a fundamental frequency at least twenty times higher than that of the AC power line voltage (ii) numerous complete relatively short half-cycles during each complete relatively long half-cycle of the AC power line voltage, with each of the numerous complete relatively short half-cycles having a peak magnitude; and (iii) the absolute value of the peak magnitude of the numerous complete relatively short half-cycles varying in time such as to be proportional to the absolute value of the instantaneous peak magnitude of the AC power line voltage, at least during a substantial portion of each relatively long half-cycle of the AC power line voltage.]