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Unread 11-03-2019, 09:58 AM   #15
mrerick
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An older discussion of fluted firing pins:

https://luger.gunboards.com/showthre...ed-Firing-Pin!

These are the patent documents Dwight referred to:

https://depatisnet.dpma.de/DepatisNe...ge=1&xxxfull=1

https://depatisnet.dpma.de/DepatisNe...433A&xxxfull=1

There is nothing like going back to original material on questions like this.

This is a rough Google Translation of the second patent: DE90433a (Luger):

description
IMPERIAL
PATENT OFFICE

The present invention relates to further embodiments of the gas paths protected by D.R.P. No. 78406, which serve to to counteract the dangerous effects of the explosive gases which strike back on the firing pin when the firing gasses penetrate into the chamber as a result of defective ammunition and the like.

The purpose of the new facilities is to make it possible for the gases which have penetrated to pass through the gas paths as unhindered and rapidly as possible get behind the plate of the firing pin and into the interior of the chamber. For this purpose, either the plate of the So that, between it and the bore of the chamber, an adequate clearance is created as a gas path, or it can pass on the inner wall of the chamber, which lines the firing pin. its plate surrounded, or otherwise arbitrary matching recesses arranged for the same purpose. These grooves or recesses can be alone or in Connection with the other gas paths of the firing pin are applied.

Some such applications illustrate the examples shown, but by which the further possible embodiments still not exhausted. Thus, Figs. 1 and 2 in cross-section and partial axial longitudinal section of the chamber a Arrangement in which route the gas paths a on the plate a and leaf b of the firing pin nor the gas paths in the form of a channel on the inner wall of the chamber c are provided. The cross-sectional figures 3 and 4 show similar Facilities, where on the basis of the flattening of the plate on the firing pin resulting gas paths a still through recesses l in the chamber the gas paths arise. Furthermore, the same sections of FIGS. 5 and 6 show applications in which Gas paths around the striker plate a by different recesses are formed in the inner wall of the chamber.

Figs. 7 and 8 finally illustrate an embodiment in which the plate of the firing pin from the inner wall of the chamber protrudes so that the correspondingly far intermediate space .alpha. ' is formed to the gas path, which is equally good by Reduction of the size of the disc can be done by partial or total enlargement of the interior of the chamber.

To the backgating known in the axial direction retroactive gases no vertical attack surface of the
To hold the striker counter, his plate with advantage to the front, d. i. to the top beveled in one of the Fig. 2 corresponding shape.
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