Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-04-23
1996-01-23
Kostak, Victor R.
Communications: electrical
Condition responsive indicating system
Specific condition
340693, 340584, 250574, G08B 1710, G08B 2300, G08B 1700, G01N 1506
Patent
active
054868165
ABSTRACT:
A photoelectric type fire detector has: a detector body; a printed circuit board disposed on the upper side of the detector body; conductive connecting members provided on the lower side of the detector body; terminal screws for simultaneously fixing the printed circuit board and the conductive connecting members to the detector body; an optic base directly placed on the upper side of the printed circuit board and having a labyrinth formed on the upper side thereof; hooks for fixing the optic base to the upper side of the printed circuit board; a light-emitting element and a light-receiving element arranged in a pair for detecting smoke; a bug screen provided on the outer periphery of the labyrinth of the optic base; an optic base cover covering the upper side of the optic base; and a protective cover covering the printed circuit board, the optic base, the bug screen and the optic base cover. The protective cover has a plurality of smoke inlet windows and is provided with hooks on the lower end thereof, the hooks engaging the detector body to fix the protective cover to the upper side of the detector body. The invention is also applicable to a heat-photoelectric type fire detector in which a heat sensing element connected to the printed circuit board is combined with the photoelectric fire detecting function. The heat sensing element is securely fixed by a protective cover of the device.
REFERENCES:
patent: 3767917 (1973-10-01), Lampart et al.
patent: 4396840 (1983-08-01), Araki et al.
patent: 4539556 (1985-09-01), Dederich et al.
patent: 4584485 (1986-04-01), Powers et al.
patent: 4672217 (1987-06-01), Dobrzanski
patent: 4724430 (1988-02-01), Igarashi
patent: 4786811 (1988-11-01), Sasaki
patent: 4851819 (1989-07-01), Kawai et al.
patent: 4897634 (1990-01-01), Sawa et al.
patent: 4929093 (1990-05-01), Suzuki et al.
patent: 5021677 (1991-06-01), Igarashi et al.
Ariga Yasuo
Hirooka Eiji
Kostak Victor R.
Miller John W.
Nohmi Bosai Ltd.
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