The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 1989
Filed:
Sep. 05, 1986
Eduard J Job, 2070 Ahrensburg, Hamburg, DE;
Other;
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.