. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. from under the nose of the cock or hammer, as shown by the dotted lines. The triggerbeing now drawn, the piece will be discharged ; and on removing the hand from the endg, of the slider /, the spring at h acting against the guard, will force the slider forward,and the lever into the position first described. Mr. Redford, gun-maker of Birminghan, proposes a modification of the lock forsmall fire-arms, in which the application of pressure to the sear spring for dischargingthe piece is
. A dictionary of arts, manufactures and mines : containing a clear exposition of their principles and practice. from under the nose of the cock or hammer, as shown by the dotted lines. The triggerbeing now drawn, the piece will be discharged ; and on removing the hand from the endg, of the slider /, the spring at h acting against the guard, will force the slider forward,and the lever into the position first described. Mr. Redford, gun-maker of Birminghan, proposes a modification of the lock forsmall fire-arms, in which the application of pressure to the sear spring for dischargingthe piece is made by means of a plug, depressed by the thumb, instead of the force ofthe finger exerted against the trigger. Fig. 403 represents a fowling piece partly in 403. ^r section. The sear spring is shown at a. It is not here connected with the trigger as inother locks ; but is attached by a double-jointed piece to a lever b, which turns upon afulcrum pin in its centre. At the reverse end of this lever an arm extends forwards,like that of an ordinary sear spring, upon which arm the lower end of the plug c isintended to bear; and when this plug is depressed by the thumb bearing upon it, thatend of the lever b will be forced downwards, and the reverse end will be raised, so as todraw up the end of the sear spring, and set off the piece. For the sake of protection,the head of the plug c is covered by a moveable cap d, forming part of a slider e, whichmoves to and fro in a groove in the stock, behind the breech end of the barrel; thisslider e is acted upon by the trigger through levers, which might be attached to the otherside of the lock-plate; but are not shown in this figure, to avoid confusion. When thepiece is brought to the shoulder for firing, th
Size: 2672px × 935px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1840, booksubje, booksubjecttechnology
