Electric heating – Heating devices – Combined with diverse-type art device
Patent
1990-05-16
1991-07-30
Walberg, Teresa J.
Electric heating
Heating devices
Combined with diverse-type art device
219528, H05B 334
Patent
active
050361775
ABSTRACT:
A method and apparatus for reducing the low frequency electric and magnetic fields associated with electric blankets and mattress pads includes a power form converter inserted between the heating element of the electric blanket or mattress pad and the AC power source. In one embodiment, the power form converter is an AC to DC converter. In another embodiment, the power form converter is a full wave bridge rectifier circuit. The power form converter may either be built into the electric blanket or mattress pad, or may be external so that an existing electric blanket or mattress pad may be used in conjunction with the power form converter.
REFERENCES:
patent: 2520851 (1950-08-01), Myers
patent: 2522753 (1950-09-01), Drobisch
patent: 3270184 (1966-08-01), Negromanti
patent: 3373262 (1968-03-01), Howell
patent: 3683151 (1972-08-01), Mills
patent: 3739142 (1973-06-01), Johns
patent: 4433368 (1984-02-01), Choi
Carnegie-Mellon Univ., "Strategies to Reduce Population Exposure . . . ", Dec. 1984.
Stevens, William K., "Scientists Debate Health Hazards . . . ", N.Y. Times, Jul. 11, 1989.
"Are Electric Blankets Safe?", Consumer Reports, Nov. 1989.
Holt, Charles A., Electronic Circuits, pp. 812-815, .COPYRGT.1978.
Jacobson Allan J.
Walberg Teresa J.
LandOfFree
Method for reducing hazards due to low frequency electric and ma does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for reducing hazards due to low frequency electric and ma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for reducing hazards due to low frequency electric and ma will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1543404