Sunlamp delayed extinction circuit

Details Sunlamp delayed extinction circuit Sunlamp delayed extinction circuit

H - Electricity

05

B

315/25

H05B 41/00 (2006.01) A61N 5/06 (2006.01)

Patent

CA 1046576

ABSTRACT: The invention relates to a sunlamp device which is provided with a high pressure mercury vapour discharge tube and with an auxiliary device for exting- uishing the discharge tube with a given time delay on termination of the desired irradiation period. According to the invention a switch connected in series with the discharge tube is shunted by a resistor having a positive temperature coefficient of resistance (PTC resistor). This ensures that after the switch has been opened on termination of the desired irradiation period the PTC resistor passes current for some time. As a result the resistance of this PTC resistor is increased, which causes the current through the discharge tube to be reduced. This finally results in an increase of the operating voltage of the dis- charge tube to a value higher than the available voltage, so that the -tube is extinguished. This device is simpler than a known device provided with two timers. - 12 -

232151

Affiliated with

Also associated with

Rating

Sunlamp delayed extinction circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sunlamp delayed extinction circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sunlamp delayed extinction circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-413757