. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. the trigger pulled. In carrying the gun at rest, theproper parts of the thumb or hand do not come over Mr. Somervilles moveable buttons orstuds. Fig. 404 is a side view of part of a double percussion gun ; and fig. 405 is a top orplan view, which will serve to explain these improvements, and show one, out of many,methods of carrying them into effect. a is the stock of the gun; b the barrels; c thebreech ; d the nipples; e the false breech, on the under side of which the levers which
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. the trigger pulled. In carrying the gun at rest, theproper parts of the thumb or hand do not come over Mr. Somervilles moveable buttons orstuds. Fig. 404 is a side view of part of a double percussion gun ; and fig. 405 is a top orplan view, which will serve to explain these improvements, and show one, out of many,methods of carrying them into effect. a is the stock of the gun; b the barrels; c thebreech ; d the nipples; e the false breech, on the under side of which the levers whichwork ihe safety studs or pins are placed; f is the shield of the false breech; g, triggers;H the lock-plate; and i the hammers: all of which are constructed as usual: a a arethe safely studs or pins, which protrude before the shield f, and work through guidepieces on the under side of the false breech. The button piece is placed in theposition for the thumb of the right hand to act upon it; but when the pressure of theball of the right thumb is to produce the movement of the safety studs, it must be placed. in or near the position k ; and when the heel of the right hand is to effect the move-ments of the safety studs, the button piece must be placed at l, or nearly so. 406 a 405
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Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
