Electrical appliance with delayed warning alarm
AssigneeWindmere Corporation
InventorsArnold Thaler, Lai Kin
Life of this patent
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Abstract
In combination with an electrical appliance, an automatic warning circuit to warn a user of an electrical hazard wherein the warning circuit comprises a timing circuit responsive to turn-off of the electrical appliance for generating a triggering signal after lapse of a predetermined time period after turn-off thereby to energize an audible alarm. The timing circuit and alarm are useful for warning a user of the appliance of an electrical safety hazard brought out by the appliance being connected to a power line while not being used.
Claims12
An electrical hand-held hair-care appliance including a utilization circuit made operative by an electric power source, said appliance comprising:
- switch means operative in at least two positions for routing the power from the power source, said switch means operative in a first position to deliver the power to said utilization circuit, and said switch means operative in a second position to deliver said power to an output of said switch means;
- a timing circuit including circuit elements for generating a triggering signal after lapse of a predetermined time period after initial activation of said timing circuit by an input signal;
- an alarm circuit including circuit elements responsive to said triggering signal for producing an alarm;
- converting means receiving the power at the output of said switch means for converting said power to both said input signal and a circuit element powering signal;
- and
- means for delivering said circuit element powering signal to said circuit elements of said timing and alarm circuits, said circuit element powering signal powering said circuit elements of said timing and alarm circuits before said converting means produces said input signal.
For use with an electrical hand-held hair-care appliance including a utilization circuit made operative by an electric power source, an automatic warning circuit to warn a user of an electric hazard, said warning circuit comprising:
- switch means operative in at least two positions for routing the power from the power source, said switch means operative in a first position to deliver the power to said utilization circuit, and said switch means operative in a second position to deliver said power to an output of said switch means;
- a timing circuit including circuit elements for generating a triggering signal after lapse of a predetermined time period after initial activation of said timing circuit by an input signal;
- an alarm circuit including circuit elements responsive to said triggering signal for producing an alarm;
- converting means receiving the power at the output of said switch means for converting said power to both said input signal and a circuit element powering signal;
- and
- means for delivering said circuit element powering signal to said circuit elements of said timing and alarm circuits, said circuit element powering signal powering said circuit elements of said timing and alarm circuits before said converting means produces said input signal.
Dependencies are inferred from the claim text.