Fire extinguishers – Sprinkler heads – Collapsible strut
Patent
1986-09-05
1989-01-10
Basinger, Sherman D.
Fire extinguishers
Sprinkler heads
Collapsible strut
169 37, A62C 3708
Patent
active
047967102
ABSTRACT:
An improved thermally active glass bulb for fire extinguisher sprinkler heads. The elongate bulb has a one piece integrally formed glass envelope which is of circular shape and has end portion and a tubular column therebetween defining an elongate sealed chamber containing a heat responsive expansible liquid to rupture the glass envelope when heat is sensed. The bulb has an elongate tapered end tip formed in loading and sealing of a quantity of the expansible breaking liquid into the chamber. The end portions are adapted for seating in the sprinkler head and have outer peripheries smoothly tapering divergently progressively endways from portions of the tubular column and toward the seating areas. The end portions having diameters in excess of a diameter of the tubular column.
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Sprinkler Bulbs, Inc., Information Sheets and Drawings, 109 Waynewood Avenue, Wayne, Pa. 19687, 9/1985.
Basinger Sherman D.
Salmon Paul E.
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