Abstract: Systems and methods are provided for operating a fluorescent tube having a pair of filaments. The system comprises a transformer, an AC signal generator and a coupling device. The AC signal generator is connected to drive a primary AC signal onto the primary winding of the transformer and to thereby create a secondary AC signal on the secondary winding of the transformer. The secondary winding of the transformer is coupled between the filaments of the fluorescent tube at first terminals thereof. The coupling device is coupled between the filaments at second terminals thereof. The coupling device is switchable between a conducting state, wherein a majority of the current associated with the secondary AC signal is conducted by the coupling device, and a non-conducting state wherein a voltage drop across the coupling device is sufficient to cause a majority of the current associated with the secondary AC signal to arc between the filaments of the fluorescent tube.

Abstract: One aspect of the invention provides scroll sign modules having laterally spaced-apart side frame members which support a pair of tape transport rolls therebetween. The axes of the rolls are parallel to each other. A tape, typically bearing visual indicia, extends between the two parallel rolls. A portion of the tape is wrapped around at least one of the rolls. Two controllable motors are mounted with at least a portion of each motor located in a bore of a corresponding one of the rolls. Each motor is operationally coupled to rotate its corresponding roll about its axis.

Abstract: Systems and methods are provided for operating a fluorescent tube having a pair of filaments. The system comprises a transformer, an AC signal generator and a coupling device. The AC signal generator is connected to drive a primary AC signal onto the primary winding of the transformer and to thereby create a secondary AC signal on the secondary winding of the transformer. The secondary winding of the transformer is coupled between the filaments of the fluorescent tube at first terminals thereof. The coupling device is coupled between the filaments at second terminals thereof. The coupling device is switchable between a conducting state, wherein a majority of the current associated with the secondary AC signal is conducted by the coupling device, and a non-conducting state wherein a voltage drop across the coupling device is sufficient to cause a majority of the current associated with the secondary AC signal to arc between the filaments of the fluorescent tube.