Simply Solved 



few ideas which have been pro- 

 posed to increase its accuracy 



An Iris Diaphragm for Both 

 Front and Rear Sights 



ELIMINATING the objections both 

 to the peep rear sight and to the 

 aperture front sight, Brian C. Bullen, of 

 Paterson, N. J., has done the obvious 

 thing and applied the well-known iris 

 diaphragm principle to both front and 

 rear sights. Just as this form of dia- 

 phragm has supplanted in camera con- 

 struction the old and clumsy form of a 

 rotating .plate with various sizes of 

 holes, it has here taken the place of the 

 rotating disk on the rear sight, elimi- 

 nating the make-shift of changing front 

 aperture rings to correspond with the size of 

 the bull's-eye. The Bullen system consists 

 merel}' of the familiar rotating ring control- 

 ing the leaves of an iris diaphragm actuated 

 by a pointer or movable button. The 

 moving leaves, as in the camera shutter, 

 increase or decrease the open- i 



ing in the sight. 

 So equipped 

 the user of the 

 rifle can adjust 

 the rear sight for 

 the prevailing 

 light. 



BvUiT 



NOTCH IN 

 OPtNlNS PMrtlTS 

 RtMOWAI. Of 

 CLIP FROM 



Using this 

 can reload 



clip the 

 the six 



man firing 

 chambers in 



the revolver 

 two seconds 



With the Bullen system the moving leaves 

 increase or decrease the sight opening 



Lubricating the Rifle Barrel with a 

 Graphite Cartridge 



A WASHINGTON man has invented a 

 cartridge containing a charge of pow- 

 dered artificial graphite between the powder 

 and the bullet or shell, the graphite con- 

 tained between a wad over the powder, and 

 the base of the projectile. Artificial graph- 

 ite won't burn up at rifle temperatures, and 

 it is a fine lubricant for steel. When the 

 powder burns, the graphite is driven out 

 between shell and chamber, lubricating the 

 barrel both ahead of 

 and behind the projec- 

 tile, protecting the steel 

 just ahead of the cart- 

 ridge from melting by 

 the powder gases — ero- 

 sion — and lubricating 

 the bore for the passage 

 of the missile. 



»n.osivE cHARee 



5tPW(WIN& V.AD 



The artificial graphite is contained be- 

 tween the powder and the bullet or shell 



Reloading a Revolver in Two 

 Instead of Fifteen Seconds 



THE automatic pistol usually carries its 

 cartridges in a detachable magazine. 

 It is quickly reloaded by dint of slipping in 

 a spare filled one, or else, in the case of some 

 of the foreign war-pistols, by stripping a 

 clip of cartridges into the fixed magazine as 

 the soldier strips 

 3 DIAPHRAGM ON FRONT thcm into his Mau- 



ser. This gives a 

 far higher con- 

 tinuous rate of 

 fire for the re- 

 volver. 



Now comes a 

 member of one 

 of the famous 

 old American revolver- making firms, with a 

 clip for slipping six shells at a time into the 

 revolver cylinder. 



He has two forms of clip, one a flat plate 

 with holes cut around its periphery to fit the 

 grooves in rimless cartridges, and with a 

 circular spring to hold the cartridges 

 in the clip or plate. In the other 

 spring, fingers opposite each opening 

 hold the cartridges in. Plate and six cart- 

 ridges go into the gun, the cartridges into 

 their chambersinthe cylinder, the plate flat 

 against the back of the 

 cvlinder. When fired 

 six times, the gun is 

 emptied by a single 

 movement of the ejector 

 rod as usual. 



Fired cartridges can 

 be replaced with fresh 

 ones in two seconds. 



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