AMERICAN INSTITUTE. 171 



by cranks at the end of tlie frame, connected by connecting bars 

 attached to the cylinder shaft. When set in motion it operates 

 as follows : Passing along on the top of the centre slide it gripes 

 the sheet at the centre of reciprocation, then continuing on to tlie 

 end of centre slide, it is let down on the under side, by means of 

 lifting bars, governed by a cam; passing over the type it is thrown 

 up at the opposite end by the same means. The lifting bars ope- 

 rate as bearers, when down, to sustain the cylinder from uneven 

 pressure. The inking apparatus is similar to that of the Adams 

 press; the composition rollers, however, run on adjustable bearers. 

 The flying apparatus is of the most simple construction, being a 

 light frame attached each side of cylinder on cylinder shaft, and 

 having wheels on the other end, fitted to run or reciprocate on a 

 track parallel with the bed. The end of fly frame attached to 

 the cylinder has tape rollers on, similar to any cylinder 2:iress, for 

 taking off the sheet; from these rollers tapes are carried around two 

 small rollers at the otlier end of frame. Its ojieration is this : the 

 sheet is delivered on the tapes, and as the cylinder reciprocates 

 back it is carried so as to just project from between the small 

 rollers at the end of the fly frame; in the next reciprocation for- 

 ward the sheet is delivered from between the rollers as last as it 

 reciprocates, and is thus sju-ead out on the fly table. The fly 

 table is so arranged that at ever}- impression it settles the thick- 

 ness of one sheet until it contains one thousand sheets. It deliv- 

 ers with great perfection and will deliver two sheets at once as 

 well as one — that is two small forms may be put on tlie press at 

 the same time, one say six inches square, and the other one ibot 

 by two feet, and the pa]K'r fed on each side of the feed board, it 

 will deliver both with tlie same facility and perfection it does 

 one. 



These presses are worked eitlier by hand or power, and require 

 no further alteration tlian simply taking oii or i)Uttii]g on tlie 

 hand crank. They work with great rapidity, give a clear and 

 beautiful impression and require but little power to drive them. 

 A boy eighteen years old will drive a double medium press all 

 day, at eight hundred or one thousand impressions per hour ; 

 they are easily adjusted, and are not liable to get out of rei)air. 



[►/? silver medal awarded. 



