Compact smoke alarm
First Claim
1. A compact smoke alarm assembly comprising:
- a smoke detection chamber defined by a body having a plurality of openings for allowing airflow therethrough, the body having a sound inlet aperture;
a smoke detector mounted to the body for communication within the chamber;
an electrical circuit operatively connected to the smoke detector, the circuit providing an electrical signal when the smoke detector detects smoke in the chamber; and
a sound generating device mounted external to the chamber adjacent to the sound inlet aperture, the sound generating device operable in response to the electrical signal;
wherein the smoke detection chamber is sized and shaped to cause resonance at the operating frequency of the sound generating device.
1 Assignment
0 Petitions
Accused Products
Abstract
A compact smoke alarm assembly (10) is disclosed. The assembly (10) comprises: a smoke detection chamber (20) defined by a body (22) having a plurality of openings for allowing airflow therethrough, the body (22) having a sound inlet aperture (25); a smoke detector (30) mounted to the body for communication within the chamber (20); an electrical circuit operatively connected to the smoke detector (30), the circuit providing an electrical signal when the smoke detector (30) detects smoke in the chamber (20); and a piezoelectric disc (40) mounted external to the chamber adjacent to the sound inlet aperture, the piezo disc (40) operable in response to the electrical signal to generate sound. The smoke detection chamber (20) is sized substantially in accordance to the Helmholtz formula to cause resonance at the operating frequency of the piezo disc (40).
7 Citations
12 Claims
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1. A compact smoke alarm assembly comprising:
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a smoke detection chamber defined by a body having a plurality of openings for allowing airflow therethrough, the body having a sound inlet aperture;
a smoke detector mounted to the body for communication within the chamber;
an electrical circuit operatively connected to the smoke detector, the circuit providing an electrical signal when the smoke detector detects smoke in the chamber; and
a sound generating device mounted external to the chamber adjacent to the sound inlet aperture, the sound generating device operable in response to the electrical signal;
wherein the smoke detection chamber is sized and shaped to cause resonance at the operating frequency of the sound generating device. - View Dependent Claims (2, 3, 4)
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5. A compact smoke alarm assembly comprising:
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a smoke detection chamber defined by a body having a plurality of openings for allowing airflow therethrough, the body having a sound inlet aperture;
a photoelectric sensor mounted to the body for communication within the chamber;
a light source mounted to the body for communication with the chamber;
an electrical circuit operatively connected to the smoke detector, the circuit providing an electrical signal when the smoke detector detects smoke in the chamber; and
a sound generating device mounted external to the chamber adjacent to the sound inlet aperture, the sound generating device operable in response to the electrical signal;
wherein the smoke detection chamber is sized and shaped to cause resonance at the operating frequency of the sound generating device. - View Dependent Claims (6, 7, 8, 9)
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10. (canceled)
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11. A compact smoke alarm assembly comprising:
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a smoke detection chamber defined by a body having a plurality of openings for allowing airflow therethrough, the body having a sound inlet aperture;
a smoke detector mounted to the body for communication within the chamber;
an electrical circuit operatively connected to the smoke detector, the circuit providing an electrical signal when the smoke detector detects smoke in the chamber; and
a sound generating device mounted external to the chamber adjacent to the sound inlet aperture, the sound generating device operable in response to the electrical signal;
wherein;
the smoke detection chamber is configured to cause resonance at an operating frequency of the sound generating device; and
the body is configured such that the volume of the chamber is generally in accordance to the Helmholtz formula at the operating frequency of the sound generating device. - View Dependent Claims (12)
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Specification