BernzOmatic fire detector

BERNZ O MATIC Model FD136 Fire Detector Air Horn Alarm with it's original WALL MOUNT. This was used in the 50's and 60's as a fire detection alarm. The idea was if it got too hot, 136 degrees, to melt the metal contact solder between the top of the compressed air bottle and the loop, then then bottle will release the air through the horn and make a very loud fire alarm for the people to hear and get out. Says on bottle FOR LOCAL AREAS ONLY. Temperature rating is 136 degrees Farenheit. That is th