by reynold inc of westfield n y and i prefer model 5bf the drive 40 is equipped with a pulley 42 and when this pulley is driven in rotation it causes the rotation of counterweights internal to the shaker drive 40 and this in turn causes a desirable type of vibration of the frame 12 the shaker drive 40 is driven by an electric motor 44 which motor is equipped with a spring biased variable speed sheave 46 the motor is mounted on the framework 10 below the shaker drive and somewhat offset toward the lower end of the table 12 as a result the v belt 48 passing around pulleys 42 and 46 and providing rotation to the shaker drive is inclined at approximately a 30 u00b0 angle to the vertical or in other words approximately conforming to the angle of the fiberglass springs 22 and 24 that form the support for the frame 12 because of this arrangement no particular elongating force is applied to the belt 48 during operation of the device the reason for the above described arrangement will become more apparent from an inspection of fig3 a wherein i have shown the vibratory frame 12 in simplified form supported by angularly disposed springs 22 and 24 this figure reveals the preferred arrangement that makes it possible for the shaker drive to provide a considerable forward thrust to the carrots resting on the members 20 the arrangement is such that upon the shaker drive unit being driven in rotation vibration essentially perpendicular to the springs 22 and 24 takes place and this.