Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1996-03-05
1997-04-15
Hofsass, Jeffery
Communications: electrical
Condition responsive indicating system
Specific condition
340541, 340626, 340666, G08B 1320
Patent
active
056213867
ABSTRACT:
An alarm system as a support of an elevated floor, whose plurality of pressure sensing devices are installed as a support outside the floor of the protection area, wherein a pressure sensing device comprises: a cover in direct contact with the lower side of the floor; a vessel, mounted below the cover, having a basin in its middle below the cover, to be filled with liquid, the basin of the vessel having a hole, through which the liquid can flow; a seal, inserted between the cover and said vessel along the circumference of the basin to impermeably seal the basin, said cover and said vessel being not in contact with each other to leave a gap for the cover to move down; an elastic membrane, which is mounted tightly on the vessel at the place of the opening of the hole; and a sensor, which is in contact with the elastic membrane to sense the deformation of this membrane under the pressure of said liquid; whereat, when an external weight exerts pressure on the floor, the cover, having undergone pressure, in turn presses on the liquid and further on the membrane, leading to contacting the sensor and precise detection with subsequent information to responsible personnel.
REFERENCES:
patent: 4032804 (1977-06-01), Wagner
patent: 4075616 (1978-02-01), Rait
patent: 4107660 (1978-08-01), Chleboun
patent: 4336533 (1982-06-01), Wettach
Hofsass Jeffery
Rushing Mark S.
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