Electricity: electrothermally or thermally actuated switches – Thermally actuated switches – With fusible – combustible or explosive material
Patent
1976-01-08
1977-10-04
Broome, Harold
Electricity: electrothermally or thermally actuated switches
Thermally actuated switches
With fusible, combustible or explosive material
337403, H01H 3776
Patent
active
040526909
ABSTRACT:
A sensitive fuse for fire alarms comprising an extremely thin heat collector disk of nickel or brass nickel plated material. A pair of phenolic resin copper laminated attachment strips are soldered to the disk to form a unitary fuse. One attachment strip is permanently soldered to the disk and the other strip is attached to the disk with a eutectic solder which is formulated to melt at a low, predetermined temperature. The phenolic resin end of each strip has a punched hole for attaching the fuse assembly to alarm valve lever arms. The thinness of the heat collector disk results in rapid transfer of heat to melt the eutectic solder. The phenolic portions of the attachment strips serve to insulate the heat sensitive portions of the fuse assembly from the remainder of the alarm device to increase sensitivity.
REFERENCES:
patent: 1663333 (1928-03-01), Carmean
patent: 1894746 (1933-01-01), Johnson
patent: 2740369 (1956-04-01), Thayer
Broome Harold
Evergard Fire Alarm Company, Inc.
LandOfFree
Sensitive fuse for fire alarm does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Sensitive fuse for fire alarm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sensitive fuse for fire alarm will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1777129