RECOIL GEARING FOR PUNT-GUNS 



191 



the trunnions, which force the holding bracket with a down- 

 ward thrust on to the bed-plate of the gear, owing to the work- 

 ing axis lying above and in front of the bearing surface of the 

 bracket. The rebound of the recoil spring is checked by the 

 after-spring or "back check." 



The material recommended is wrought or forged steel for 

 all parts. The bracket may be a steel casting, and the bed- 

 plate and pivot socket of brass, if thought better. Reference 



Cross section through gun-beam of large punt, showing Elevator and Screw. 

 Rope Recoil Gear for Punt-Gun 



Longitudinal section, fore end of punt, showing Rope Recoil Gear for Punt-Gun 



to our sketches should suffice for almost anyone to grasp the 

 idea of construction. Those versed in engineering practice 

 may more readily see what is required. Our design is one 

 of a 2 in. gun. The forespring is f in. square steel, the back- 

 spring of ^ in. The trunnions, ring holding same to the 

 gun, and all other working parts except the bed-plate and 

 bottom of the bracket, to be skin-hardened. The top or 

 face of bed-plate and the bottom of the bracket should be 

 planed. The clips holding the springs in position on the 

 gun-barrel are turned inside with shallow "spigots," so as 

 to fit corresponding sockets in the gun-barrel and hold better. 



