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From: boyd@mailer.cc.fsu.edu (Mickey Boyd)
Newsgroups: rec.guns
Subject: Origin of delayed blowback action
Message-ID: <35153@mimsy.umd.edu>
Date: 3 Jun 91 00:33:40 GMT
Sender: magnum@mimsy.umd.edu
Organization: Florida State University Computer Science Department
Lines: 30
Approved: gun-control@cs.umd.edu

In article <35138@mimsy.umd.edu>, I myself wrote:
#
#.....  Now, a delayed blowback weapon takes advantage of the 
#ballistic fact that if keep the gun "locked up" for just a split second 
#after firing the amount of energy imparted to the slide drops considerably.
#Thus, in these guns (for example, a Colt 1911A1) the barrel moves WITH the 
#slide for a small distance, which allows pressures to drop significantly.
#The barrel and slide then part ways, and the rest of the sequence is as above.
#I believe John Browning invented this type of action.  One advantage with this
#type of action is that you can have a lighter (and thus SMALLER) slide on the 
#gun.  

I just looked this up, and have found that:

   A)  John Browning invented THIS particular method of holding the gun in 
	battery for a split second (that is, the sliding link/locking lug
	in slide method).  

   B)  This was not the first delayed blowback gun.  Amazingly enough, the 
	Luger also holds the gun in battery for a short time when fired.  A 
	text I read discusses this type of action on experimental Thompson 
	machine guns first, but does not really state when or by whom the 
	delayed blowback method was invented.

Just FYI.
-- 
             Mickey R. Boyd          |  "God is a comedian playing to an 
          FSU Computer Science       |      audience too afraid to laugh."
        Technical Support Group      |
      email:  boyd@fsucs.cs.fsu.edu  |                  - Voltaire