RIVETING MACHINE 



705 



description of flat and circular work can bo riveted, and by selecting those on the 

 sides, it will rivet the corners, and thus complete vessels of almost every shape. This 

 machine is in a portable form, and can be moved off rails with care to suit the article 

 suspended from the shears. 



1711 



The introduction of the knee-joint gives to the dies a variable motion, and causes 

 the greatest force to be exerted at a proper time, viz. at the closing of the joint and 

 finishing of the head of the rivet. 



In other respects the machine operates as before, effecting by an almost instanta- 

 neous pressure what is performed in the ordinary mode by a long series of impacts. 

 The machine fixes in the firmest manner and completes eight rivets of 2-inch diameter 

 in a minute, with the attendance of two men and boys to the plates and rivets ; 

 whereas the average work that can be done by two riveters, with one 'holder on' 

 and a boy, is 40 5-inch rivets per hour ; the quantity done in the two cases being in 



VOL. III. Z Z 



