公开(公告)号：US3742417A

公开(公告)日：1973-06-26

申请号：US3742417D

申请日：1971-12-13

Applicant: COTHERM SA

Inventor： SNIPELISKI J

IPC: A62C37/12 ,  F16G15/04 ,  H01H37/76

CPC classification number: F16G15/04 ,  A62C37/12

Abstract: A thermal tripping device for fire protection installations in which an alarm, valve or other appliance is operated by release of a spring biased rod having at one end an eye normally held between two oppositely facing and overlapping hooked or nose shaped parts each formed on an end of two superimposed plate-like arms mounted at their other ends on a common pivot. Each arm has a concave part facing the other to define a free space which contains a bulb which explodes above a predetermined temperature to allow the arms to pivot open and release the rod, but while in an intact state the bulb holds the arms locked together.