Smoke alarm activated portable lamp
First Claim
1. A portable lamp activated by the sound signal of a smoke alarm comprising:
- (a) a frequency selective microphone;
(b) a light bulb;
(c) a battery;
(d) circuit means interconnecting said microphone, light bulb, and battery and responsive to the sound signal of a smoke alarm device to effect illumination of said light bulb;
(e) a portable housing with said microphone, light bulb, battery, and circuit means mounted thereon; and
(f) light activated switch means connected to said circuit means and rendering said circuit means unresponsive to said sound signal during illumination of said light activated switch means to thereby conserve battery power.
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Accused Products
Abstract
A smoke alarm activated portable light or lamp for providing emergency illumination in response to an alarm signal from a smoke alarm device includes a frequency selective microphone, several amplifier stages, a peak detector, an isolation or buffer stage, and a power stage comprising a pair of cascaded transistors and a light bulb. The lamp includes a bracket for positioning same in proximity to a smoke alarm and a switch which is closed upon removal of the lamp from the bracket. A power saving circuit includes a photoelectric cell and an amplifier and is operative to saturate or overdrive the first gain stage to override any signal from the microphone whereby the lamp is rendered unresponsive to the smoke alarm signal upon illumination of the photocell by daylight or artificial light.
50 Citations
10 Claims
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1. A portable lamp activated by the sound signal of a smoke alarm comprising:
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(a) a frequency selective microphone; (b) a light bulb; (c) a battery; (d) circuit means interconnecting said microphone, light bulb, and battery and responsive to the sound signal of a smoke alarm device to effect illumination of said light bulb; (e) a portable housing with said microphone, light bulb, battery, and circuit means mounted thereon; and (f) light activated switch means connected to said circuit means and rendering said circuit means unresponsive to said sound signal during illumination of said light activated switch means to thereby conserve battery power. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In a sound activated illumination device including:
- sound activated illumination circuit means;
a light bulb connected to and illuminated by said circuit means upon activation of same in response to a selected sound signal; and
a portable housing enclosing said circuit means and bulb, the improvement comprising;(a) a battery enclosed in said housing, connected to said circuit means and said bulb, and providing operating power for said device; (b) light activated switch means connected to said circuit means and rendering said circuit means unresponsive to said sound signal during illumination of said light activated switch means to conserve the power of said battery; (c) a bracket removably mounting said device in spaced relation to a smoke alarm device for activation by a sound signal from said smoke alarm device; (d) a normally closed (NC) switch connected to said circuit means and bypassing same to effect illumination of said light bulb in a closed condition of said NC switch; and (e) said NC switch being held in an open condition by positioning said housing in said bracket. - View Dependent Claims (9, 10)
- sound activated illumination circuit means;
Specification