Method of dispensing vapor to the air in a room and an apparatus for carrying out the method
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United States of America Patent
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Jul 9, 1991
Issued Date -
N/A
app pub date -
Apr 4, 1989
filing date -
Dec 9, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
By method of dispensing vapor, preferably perfumed vapor, to the air in a room from a vapor dispensing substance, vapor is dispensed by means of an electrically controlled control device for controlling the vapor dispensation of the vapor dispensing substance, and an electrical circuit for controlling the current supply to the control device. By the fact that the electrical circuit is supplying a time controlled, gradually increasing current supply to the control device in time periods with intermediate periods of no current supply to the control device is achieved that the concentration of the vapor dispensed is kept at a constant level, until the vapor dispensation substance has been used up.
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