1253566-A2 is referenced by 7 patents and cites 3 patents.

An improved fire detector unit has a plastic base defining a smoke chamber for detection of a smoke density in terms of light scattering due to the smoke particles in the smoke chamber. The base carries a circuit board mounting a light emitting element, a light receiving element, and other components forming a fire detecting circuit responsible for generating a fire warning signal based upon the detected smoke density. A metal-made electromagnetic shield is molded into the base to protect the light receiving element from electromagnetic radiation noises. The electromagnetic shield includes a ground terminal for connection with a ground line of the circuit board. In addition, terminal pins are molded into the base for electrical and physical connection of the circuit board to the base.

Title
Fire detector unit
Application Number
EP20020000988 20020117
Publication Number
1253566 (A2)
Application Date
January 17, 2002
Publication Date
October 30, 2002
Inventor
Kirihata Shinji
JP
Nagasawa Naoya
JP
Toyoda Kenji
JP
Kawano Yasuyuki
JP
Wada Takeshi
JP
Sakamoto Koji
JP
Oka Shoichi
JP
Nishikawa Takayuki
JP
Assignee
Matsushita Electric Works
JP
IPC
G08B 17/107
G08B 17/103
G08B 17/107
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