Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1979-10-09
1987-03-17
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
29512, 337320, 337328, 340593, 340693, G08B 1704
Patent
active
046511407
ABSTRACT:
An improved fire detector vented to atmosphere, capable of closing or opening an alarm circuit on the happening of either two events, when the rate of rise of the temperature of the ambient atmosphere exceeds a predetermined prescribed rate of rise of temperature and when the temperature of the ambient atmosphere exceeds a predetermined fixed temperature, the detector being of the type comprising a base supporting a diaphragm enclosing a space between the base and diaphragm, a shell secured to the base enclosing the diaphragm, vent apertures through the base from the space between the diaphragm and shell, and between the diaphragm and base, to the back of the detector, and a fin for collecting heat from the ambient atmosphere. The vent aperture permits the spaces between the diaphragm and base, and shell and base to be vented to atmosphere under normal expansion and contraction of the ambient atmosphere. The fin is connected by a blind hole ferrule which is closed by an end face and supports a detente member for actuating an alarm at a predetermined temperature. The connection between the fin and ferrule is formed by causing metal from the end face of the ferrule to flow over fin metal surrounding the aperture of the fin through which aperture the ferrule extends.
REFERENCES:
patent: 1174149 (1916-03-01), Himmer Jr.
patent: 2389429 (1945-11-01), Griffith
patent: 2413140 (1946-12-01), Griffith
patent: 2779998 (1957-02-01), Bailey
patent: 3098286 (1963-07-01), Anderson et al.
patent: 3188434 (1965-06-01), Numayama
patent: 3303308 (1967-02-01), Koopman
patent: 3406556 (1968-10-01), Musser
patent: 3827012 (1974-07-01), Duggan
patent: 4116357 (1978-09-01), Stanley Jr.
Fire Detection Devices Ltd.
Hughes Ivor M.
Swann III Glen R.
LandOfFree
Fire detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fire detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fire detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1790845