Multi-mode control circuit and indicator arrangement for an electrical appliance
First Claim
1. A control circuit for an electrical appliance comprising:
- first indicating lamp for representing first condition for said electrical appliance;
second indicating lamp for representing a second condition for said electrical appliance;
third indicating lamp for representing a third condition for said electrical appliance;
first timing means connected to said first indicating and second indicating lamps, which, upon reaching a first predetermined time threshold, extinguishes said first indicating lamp and turns on said second indicating lamp; and
second timing means connected to said second and third indicating lamps and an operative element of said electrical appliance such that, upon reaching a second predetermined time threshold, said second timing means extinguishes said second indicating lamp, deactivates said operative element of said electrical appliance and turns on said third indicating lamp.
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Accused Products
Abstract
A time-based electrical appliance multi-mode control circuit and indicator arrangement which is connected to a power supply and an on and off switch. Upon turning the switch on, power is simultaneously supplied to the electrical appliance load and to a dual timer circuit. A first timer in the circuit is immediately energized causing a first indicator to represent an on state to the user. After a predetermined length of time, the first timer causes one output to go low, turning off the on state indicator and respectively turning on a ready state indicator. A second timer is then activated for a second predetermined period. At the end of the second period, the ready state indicator is turned off and the standby state indicator is turned on. At the same time, a triac connected to the electrical appliance load is turned off causing the power to the load to be automatically switched off.
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Citations
16 Claims
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1. A control circuit for an electrical appliance comprising:
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first indicating lamp for representing first condition for said electrical appliance; second indicating lamp for representing a second condition for said electrical appliance; third indicating lamp for representing a third condition for said electrical appliance; first timing means connected to said first indicating and second indicating lamps, which, upon reaching a first predetermined time threshold, extinguishes said first indicating lamp and turns on said second indicating lamp; and second timing means connected to said second and third indicating lamps and an operative element of said electrical appliance such that, upon reaching a second predetermined time threshold, said second timing means extinguishes said second indicating lamp, deactivates said operative element of said electrical appliance and turns on said third indicating lamp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of controlling an electrical appliance having an operative element, comprising the steps of:
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activating a first indicator means upon the turning on of said operative element of said electrical appliance; activating a first timer means for a first pre-determined time period simultaneously with the activation of said first indicator means; extinguishing said first indicator means and activating a second indicator means for a second pre-determined time period; extinguishing said second indicator means and then activating a third indicator means at the expiration of said second pre-determined time period; and deactivating said operative element of said electrical appliance simultaneously with the activation of said third indicator means.
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15. A control circuit for an electrical appliance comprising:
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first, second and third indicating means for respectively indicating three different states of said electrical appliance; activating/deactivating means for said first, second and third indicating means, said activating/deactivating device including first and second timing means such that at least two of said indicating means are time-based upon said first and second timing means; and said activating/deactivating means further including a device for deactivating an operative element of said electrical appliance.
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16. A control circuit for an electrical appliance comprising:
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first indicating lamp for representing a first condition for said electrical appliance; second indicating lamp for representing a second condition for said electrical appliance; third indicating lamp for representing a third condition for said electrical appliance, said first, second and third conditions being different conditions for said electrical appliance; first timing means connected to said first and second indicating lamps, which, upon reaching a first predetermined time threshold, extinguishes said first indicating lamp and turns on said second indicating lamp; and second timing means connected to said second and third indicating lamps and an operative element of said electrical appliance such that, upon reaching a second predetermined time threshold, said second timing means extinguishes said second indicating lamp, deactivates said operative element of said electrical appliance and turns on said third indicating lamp.
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Specification