Alexander L Ertz

US Patent:

59106891, Jun 8, 1999

Filed:

Apr 28, 1997

Appl. No.:

8/847781

Inventors:

Alexander L. Ertz - Germantown TN
Thomas A. Mascari - Memphis TN
Reginald J. Rodriguez - Germantown TN

Assignee:

The Bodine Company, Inc.

International Classification:

H02J 0906

US Classification:

307 64

Abstract:

A standby ballast for a fluorescent lamp in a lighting circuit powered normally by a main AC power supply, and in the event of main power supply failure, powered by an auxiliary standby generator, the standby ballast operable to provide AC power to the lamp for the interim between failure of main AC power supply and the supply of stabilized auxiliary AC power from the standby generator as it has started and reached normal operating condition.

US Patent:

47513985, Jun 14, 1988

Filed:

Mar 18, 1986

Appl. No.:

6/840896

Inventors:

Alexander L. Ertz - Collierville TN

Assignee:

The Bodine Company - Collierville TN

International Classification:

H02J 700
H02M 545

US Classification:

307 66

Abstract:

A lighting system is provided having a central power supply which includes an AC to DC converter. The DC power is distributed to a plurality of ballast circuits for discharge lamps. Each ballast circuit includes an inverter circuit for inverting the DC power to AC power of sufficient voltage to operate the associated lamps. Should the AC input power for the central power supply fail, batteries may be provided to supply the DC power continuously without interruption. The inverter circuits are operated at high frequency to reduce audible noise and eliminate noticeable strobing. The inverter circuit includes a switching circuit controlled by a pulse train. The duty cycle of the pulse train is controlled in accordance with a composite feedback signal which is the product of signals representative of the lamp operating voltage and lamp current.

US Patent:

20120181934, Jul 19, 2012

Filed:

Jul 29, 2010

Appl. No.:

13/388354

Inventors:

Engel J. Knibbe - Heeze, NL
Alexander Ertz - Memphis TN, US
Mareike Klee - Straelen, DE
Leo Verhees - Veldhoven, NL

Assignee:

KONINKLIJKE PHILIPS ELECTRONICS N.V. - EINDHOVEN

International Classification:

H05B 37/02

US Classification:

315130, 315153

Abstract:

According to the present invention, a light guidance system for adapted illumination in emergency or power cut situations is provided, wherein the light guidance system is connected to an auxiliary power supply system () and comprises at least one light unit () adapted to emit light for illuminating surroundings and a control unit adapted to increase a light level of the light unit () according to a presence signal indicating the presence of a person, wherein the increasing of the light level is adjusted to enable a mandatory lighting period and a mandatory light level by considering a power value of the auxiliary power supply system ().