86 



The Compound Lever Press or Forcer. 



Vol. 11. 



For the Farmers' Cabinet. 

 TUe Compound Lever Press or Forcer. 



This machine may be used to great ad- 

 vantage where an increased pressure is re- 

 quired from a first mover that is uniform in 

 its force. The following description will 

 explain the principle upon which it acts, viz : 

 Suppose a slide moving in a groove at right 

 angles, to another groove in which two other 

 slides move. Motion is conveyed to the 

 two latter slides from the former one, by two 

 connecting rods and four fulcrums, one ful- 

 crum at each end of the respective rods. 



Fig, 



A compound lever, acting with catches or 

 hands in notches formed upon the first men- 

 tioned slide in groove No. 1, so as to change 

 the relative position of the connecting rods 

 from an angle of forty-five degrees, (or other 

 convenient angle,) to a straight line, (or any 

 degree approaching a straight line,) will 

 show the manner which the other slides in 

 groove No. 2 2, are acted upon so as to con- 

 vey to them and through them to other ob- 

 jects, an increased degree of pressure or force, 

 while the first mover is one of a uniform de- 

 gree of force. 



]5. 



The compound lever may be moved by 

 the power of men, horses, water, steam, 

 wind, or any other convenient force. 



The compound lever A A, moving on a 

 fulcrum near the middle, moves the notched 

 slide B B, by means of the catches or hands 

 C C, this moves the connecting rods D D 

 on the fulcrums at their ends, and forces the 

 slides E E, farther asunder. The nearer 

 the connecting rods D D approach a straight 

 line, the greater will be the pressure of the 

 slides E E upon the objects F F, confined 

 between them and G G. 



The fulcrums, hands and notches may be 

 composed of iron, and the other parts of 

 strong seasoned wood ; of such dimensions 

 as the force to be applied may require, or 

 any other convenient substance. 



The particular manner in which this press 

 may be used for various purposes, and the 

 different powers which may be employed as 

 first movers, will, probably, be given here 

 after. P. 



The foregoing description shows the pres- 

 sure of the two slides E E in opposite direc 

 tions; ihe following will explain how motion 

 may be extended so as to press or force a 

 body in a direction at right angles to the 

 aforesaid motion ; or two bodies in a circular 

 direction, viz : Suppose two other connect- 

 ing rods, moving on four fulcrums; one ful- 

 crum at each end of the respective rods, two 

 of them on the slides E E, and the other two 

 on another slide which moves in grooves at 

 right angles to that in which E E moves. 

 Or instead of moving in grooves at right 

 angles to the motion of E E, the fulcrums 

 at the other ends of the connecting rods may 

 be attached to two separate objects, each of 

 which moves on another fulcrum, so that a 

 circular motion may be given to those ob- 

 jects from the rectilinear motion of E E, 

 communicated as aforesaid, from the com- 

 pound lever A A. (Fig. 16.) 

 I The aforesaid slides E E being forced far- 

 Ither asunder, as already described, until the 



