An alarm sound device or electrical device installation for when the gas key is left open (Machine-translation by Google Translate, not legally binding)

摘要

Installation of device or audible electrical alarm device for when the gas tap is left open "characterized by a" Thermostat "with high sensitivity to cold and heat with a lever that goes to the gas flame (Figure 2 of the graph); to the the said Lever (P) is heated, the mild iron plate A-B expands by lowering the steel-silver sheet F-D that carries the insulator C; When this sheet is lowered, it carries with it the sheet F-D that separates it from the sheet G-E, thus cutting off the passage of the electric current, disconnecting the buzzer S "cicada" of alarm. Said "thermostat" is connected to the electrical circuit by terminals H. and l. (Machine-translation by Google Translate, not legally binding)