ES219792A1 - Some improvements in the safety equipment applied to water heaters by combustible gases (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in the safety equipment applied to water heaters by combustible gases, characterized by the fact of incorporating into the gas control and control mechanisms, an organization of devices that collectively and inseparably gather and understand the following conditions: A) condition the gas access to the burner by a safety valve, which automatically closes by an elastic spring, requiring for its opening the thrust of a rod coaxial with the valve shaft, operated as a function of the pressure of the access effective water to the heater tank; but interposing between both elements a transverse locking piston, perpendicular to the valve-rod axis, which has a secondary stem housed in its mass, perpendicular to the piston and its own axis displaceable; the main piston closes at one end the gas access to the burner and on the opposite is attached to its control hand by a special linking element of rectangular straight section guided by the equivalent slot provided in a support and guide; B) relate the possibility of rotation and therefore unblocking of the main piston, with the previous opening of the gas access to the valve chamber, with a certain recoil of the piston-hand until matching notches of the link element with a circular groove provided in the groove of the aforementioned support; C) to relate the effective opening of the gas access to the antechamber of the safety valve with the previous ignition of the permanent flame fed from this antechamber, by means of a flat disc valve, disposed in the internal base of the piston; guided, this valve, by a posterior cane occluded in the piston itself and prolonged to the opposite end, where the link with the hand forms a double elbow, and where a bimetal blade heated by the permanent flame acts on the cane cold block said rod, but being temporarily removed, when starting the rotation of the locking piston by a stop that is located on the bent bottom of the link, acts by turning the set hand, link and piston; D) graduate the maximum gas passage to the burner, by means of a truncated cone screw, whose generatrix serves as a transverse stop to an upper rod of the gas passage safety valve, limiting its opening stroke. (Machine-translation by Google Translate, not legally binding)