Hush disable feature for photoelectric smoke alarm
First Claim
1. A hush mode disabling device for a smoke alarm having a self-test function, a hush mode that engages upon activation of the self-test function to silence or desensitize the smoke alarm for a predetermined period of time, and a remote self-test controller, wherein an improvement comprises:
- a hush mode disabler for determining whether the self-test function has presently been activated by the remote self-test controller and for disabling the hush mode if the self-test function has presently been activated by the remote self-test controller.
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Accused Products
Abstract
A hush mode disabling device for a smoke alarm having a self-test function, a hush mode that engages upon activation of the self-test function to silence or desensitize the smoke alarm for a predetermined period of time, and a remote self-test controller. An improvement includes a hush mode disabler for determining whether the self-test function has presently been activated by the remote self-test controller and for disabling the hush mode if the self-test function has presently been activated by the remote self-test controller.
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Citations
12 Claims
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1. A hush mode disabling device for a smoke alarm having a self-test function, a hush mode that engages upon activation of the self-test function to silence or desensitize the smoke alarm for a predetermined period of time, and a remote self-test controller, wherein an improvement comprises:
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a hush mode disabler for determining whether the self-test function has presently been activated by the remote self-test controller and for disabling the hush mode if the self-test function has presently been activated by the remote self-test controller. - View Dependent Claims (2, 3, 4, 5)
a collector connected to a hush mode sensitivity level configuration input provided on the smoke alarm;
an emitter connected to a fixed voltage level; and
a base connected to the remote self-test controller wherein, when the remote self-test controller energizes the base of the transistor, the fixed voltage level is seen on the hush mode sensitivity level configuration input, causing the hush mode to be substantially disabled.
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5. The hush mode disabling device of claim 4, wherein the fixed voltage level is set at circuit ground.
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6. A self-contained smoke alarm connected to a centralized fire alarm system, comprising:
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a self-test function;
a self-test button for activating the self-test function;
a hush mode, whereby the self-contained smoke alarm is desensitized for a predetermined period of time after the self-test function is activated;
a remote self-test controller, whereby the self-test function of the self-contained smoke alarm can be activated through the centralized fire alarm system from a location remote to the self-contained smoke alarm; and
a remote hush disabling means for disabling the hush mode when the self-test function is activated by the remote self-test controller. - View Dependent Claims (7, 8, 9, 10)
a collector connected to a hush mode sensitivity level configuration input provided on the self-contained smoke alarm;
an emitter connected to a fixed voltage level; and
a base connected to the remote self-test controller wherein, when the remote self-test controller energizes the base of the transistor, the fixed voltage level is seen on the hush mode sensitivity level configuration input, causing the hush mode to be substantially disabled.
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10. The hush mode disabling device of claim 9, wherein the fixed voltage level is set at circuit ground.
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11. A hush mode disabling circuit for a smoke alarm having a hush mode connected to a remote self-test controller, the disabling circuit comprising:
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a collector connected to a hush mode sensitivity level configuration input provided on the smoke alarm;
an emitter connected to a fixed voltage level; and
a base connected to the remote self-test controller wherein, when the remote self-test controller energizes the base of the transistor, the fixed voltage level is seen on the hush mode sensitivity level configuration input, causing the hush mode to be substantially disabled.
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12. A smoke alarm with a hush mode comprising:
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a smoke alarm;
a smoke alarm self-test means for performing a self-test of the operation of the smoke alarm;
a remote self-test controlling means for activating the self-test means from a remote location;
a hush means for disabling or desensitizing the smoke detection means for a predetermined period of time after the self-test means has been activated; and
a hush disabling means for deactivating the hush means when the self-test means has been activated by the remote self-test activation means.
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Specification