Moisture annunciator

Details Moisture annunciator Moisture annunciator

1997-11-20

1999-06-01

Clarke, Robert A.

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

340604, A61F 1342

Patent

active

059084111

ABSTRACT:
For a diaper for a baby, a toddler, an old man, or the like, a device for informing a mother of the baby or the toddler or a person who looks after the user of the diaper that the diaper is wet and a sensor for use in the device are provided. A wet annunciator is comprised of: a wet sensor that forms electrostatic capacity between a pair of electrodes 3 and 4 adhesively formed so as to be slightly spaced apart from each other, such that the electrostatic capacity in the vicinity of the electrodes varies when the diaper gets wet; an oscillating device 11 for applying an alternating signal to the electrodes 3 and 4 of the wet sensor; a detector 13 for picking up a change of the electrostatic capacity between the pair of electrodes 3 and 4; and an alerting device such as a vibrator 15, a buzzer or the like, operative according to an output signal of the detector 13. When a diaper is wet due to excretion of the user, the electrostatic capacity between the electrodes 3 and 4 varies, the alerting means is operated, and the mother or the person who looks after the user of the diaper is informed that the diaper gets wet.

REFERENCES:
patent: 4754264 (1988-06-01), Okada et al.
patent: 5291181 (1994-03-01), DePonte
patent: 5557263 (1996-09-01), Fisher et al.

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