This post references two Luger firing pin patents: (
DRP 78,406;
DRP 90,433)
Both German patents are assigned to Georg Luger.
The second patent discusses bypassing gasses. This is a google translation of the first paragraphs of the patent:
"The present invention relates to further embodiment of the gas paths protected by D.R.P. No. 78406, which are used to reduce hazard and counteract the effects of the explosive gases which repel the impact bolts when the latter is caused by shocks as a result of damaged ammunition and the like enter the chamber.
The new facilities are intended to cause the gases, which have penetrated, to flow as freely and rapidly as possible through the gas passages behind the Plate of the impact bolt and into the interior of the chamber. For this purpose, either the plate of the striker is dimension-ed such that between it and the bore of the chamber, a corresponding clearance is formed as a gas path, or is formed on the inner wall of the chamber When the striking pin is bent, whose plate is surrounded, or otherwise any suitable recesses are arranged for the same purpose.
These grooves or recesses can be used alone or in combination with the other gas paths of the impact bolt."
Click on the patent number (above) for a PDF of each patent straight from the German patent registration site. It's a wonderful resource for researching things firearm in Germany. I used it to great impact when working with Mauro and Gerben on the Mauser book recently published.