
US Patent No: 4,737,769
Number of patents in Portfolio can not be more than 2000
Fire detection alarm system
Stats
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Apr 12, 1988
Issued date -
Jan 3, 1986
filing date -
06/815,946
serial no -
Expired
status
Importance
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Abstract
An alarm system utilizing existing electrical wiring in conjunction with an alarm box. An alarm signal is manually or automatically generated and is converted to an RF signal which is conducted over the existing electrical wiring to an alarm box. The RF signal is re-converted to an electronic or electrical signal and the alarm signal is visually displayed. Various sensors for sensing the presence of various conditions, such as fire or unauthorized intrusion are removeably or directly affixed to plug receptacles or wall switches. Additionally, the system is connected to circuit protection devices, such as circuit breakers which could be tripped, should a fire conduction be sensed.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| RE31147 Ground fault and fire detector system | 5 | 1981 | |
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| 2002/0143,320 Tracking medical products with integrated circuits | 2 | 2002 | |
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| 4,203,096 Sensor monitoring alarm system | 30 | 1978 | |
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| 4,429,299 Two-way AC power line communications system | 74 | 1981 | |
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| 4,446,454 Home security system | 99 | 1981 | |
| 4,635,040 Fire detection alarm system | 18 | 1985 | |