B

21"

THE GUARD IS MADE BY CUTTING TWO PIECES OF ANGLE IRON 24" LONG, FORMING A 90° ANGLE ON EACH END (FIG. 1) AND WELDING.

FIGURE 1.

FIGURE 1.

MATERIAL t It" X lh" X V MILD STEEL ANGLE NO. OFF t ONE COMPLETE FRAMT

21"

MATERIAL t IV : IV X MILD STEEL ANGLE NO. OFF i A i 2| B t 1} C i 2.

STAGE 2. ASSEMBLY OF TOP FRAME AND GUARD

21"

21"

n«M

1 L„„

V i

DETAIL OF GUARD AND INPUT GAP FABRICATION

I 11 INPUT GAP

CUT AWAY VIEH ON ARROW X

STAGE 3. ROTOR THRESHER

A. THE BLADES OF THE ROTOR NEED TO BE OF SUCH DESIGN AS TO GIVE A THRESHING ACTION. IN THE PROTOTYPE MODEL, THE ROTOR BLADES HERE COMBINE HARVESTER BLADES (FIGURE 1).

FIGURE I.

HOWEVER, IT IS NOT ESSENTIAL THAT THE BLADES BE OP THE DESIGN IN FIG. 1. FIGURE 2. SHOWS A METHOD OF FABRICATING BLADES TO GIVE A THRESHING ACTION. MATERIALS NESS : X 2" MILD STEEL PLATE AND V 0 MILD STEEL ROD.

[held on both sides

FIGURE

[held on both sides

FIGURE

PLATE

NOTE: RODS MUST BE SPACED AT V INTERVALS AND WELDED AT A SLIGHT ANGLE, AS SHOWN.

NO. OFF s 2 BLADES, ONE RIGHT HAND ONE LEFT HAND ///

B. BLADES : HELD ROTOR BLADES TO SQUARE SECTION, ONE LEFT HAND AND ONE RIGHT HAND.

B. BLADES : HELD ROTOR BLADES TO SQUARE SECTION, ONE LEFT HAND AND ONE RIGHT HAND.

NO. OFF : TWO

THE SEARINGS FOR THE ABOVE CENTRE SHAFT ARE TWO STANDARD BICYCLE PEDALS, AS SHOWN BELOW IN FIGURE 3.

NOTE ! THE PEDALS MUST BE h TIGHT FIT IN THE SQUARE SECTION ENDS. THE 'SPROCKET (SEE FIG. 4 NEXT PAGE) MUST BE FITTED TO ONE SIDE OF SHAFT PEDAL

OF BEARING. CRAHK

SQUARE SECTION SHAFT FIGURE 3. (SECTION ON AA)

CUT OFF CRAUK' AT THIS LENGTH

FIGURE 3. (PEDAL CRANK)

FIGURE 4.

0 0

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