Flash-back arrestor for dissolved acetylene cylinders

Claim 1

A holder for dissolved acetylene comprising a container having a threaded opening therein and a mass of wetted porous material in the container for stabilizing acetylene charged thereinto, said holder being characterized by: A. a valve body threadedly secured in said opening and having therein (1) a substantially coaxial passage portion which opens to the interior of the container, (2) another passage portion which is communicated with said substantially coaxial passage portion and which opens outward, and (3) a valve member for controlling communication between said passage portions; B. a cylinder coaxially secured to an inner portion of said valve body and projecting therefrom a distance into the interior of the container, said cylinder defining a flash-back arrester gas passage and having opposite gas permeable end walls to permit flow of gas therethrough between the interior of the container and said substantially coaxial passage portion; C. a filter plate in said cylinder inwardly adjacent to each of said gas-permeable end walls thereof; and D. a packing of granular material in the cylinder, between said filter plates.