Hush disable feature for photoelectric smoke alarm
AssigneeMaple Chase Company
InventorThomas Kondziolka
Life of this patent
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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.
Claims12
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.
A self-contained smoke alarm connected to a centralized fire alarm system, comprising:
- 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.
A hush mode disabling circuit for a smoke alarm having a hush mode connected to a remote self-test controller, the disabling circuit comprising:
- 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.
A smoke alarm with a hush mode comprising:
- 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.
Dependencies are inferred from the claim text.