Improvements in unam cutting macnines.
Year: 1899

page_text: I, DAVID ADAM FYFE, of Victoria Mills, Wharf Road, Stratford, in the County
of Essex, Forage Merchant, do hereby declare the nature of this invention
to be as follows:-
When using chaff cutting machines such as are at present made it is necessary
to sift the chaff after cutting in order to remove long pieces which by reason of
having been more or less parallel to the knife have escaped being cut. This
process increases the expense and more or less damages the chaff by breaking it
and producing dust.
According to this invention I employ a series of short knives parallel to the
Juection of the feed in addition to the ordinary transverse knife oi knives
Preferably the knives are carried by a frame which reciprocates up and down
in guides. In place also of the usual continuous feed I use a step by step feed
so that the material is stationary whilst the cut is taking place
By employing machines such as are above described I am able to cut com-
pressed fodder without previously loosening or shaking it out thereby saving
much expense and avoiding damage to the fodder and the formation of dust
It also avoids the necessity of using the high speeds now employed for since
the quantity cut at each stroke of the knite is much larger fewer cuts per
minute are required to turn out the same weight
Improvements in unam cutting macnines.
I, DAVID ADAM FYFE, of Victoria Mills, Whaif Road, Stratford, in the County
of Essex, Forage Merchant, do hereby declare the nature of this invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement.--
When using chaff cutting machines such as are at present made it 18 necessary
to sift the chaff after cutting in order to remove long pieces which by reason of
having been more or less parallel to the knife have escaped being cut This
process increases the expense and more or less damages the chaff by breaking it
and producing dust.

page_text: According to this invention I employ a series of short knives parallel to the
direction of the feed in addition to the ordinary transveise knife or knives
Preferably the knives are carried by a frame which reciprocates up and down
in guides In place also of the usual continuous feed I use a step by step feed
so that the material is stationary whilst the cut is taking place
By employing machines such as ate above described I am able to cut com-
pressed fodder without previously loosening or shaking it out thereby saving
much expense and avoiding, damage to the fodder and the formation of dust
It also avoids the necessity of using the high speeds now employed for since
the quantity cut at each stroke of the knite is much larger fewer cuts per
minute are required to turn out the same weight
The drawings illustrate machines made in accordance with this invention.
Figure 1 18 a font view, Figure 2 18 a' side view, and Figure 3 a section on
the line 33 Figure 1.
aa are upughts canying guides upon which the frame c recipiocates
On the frame c are knives d parallel to the direction of the feed and the knife e
transverse to this direction The frame 18 actuated by means of a rod f con-
nected to the aim g'on the shaft h. The material (Figure 1) fed onto an
endless band & which conveys it between two sets of rollers and m m. Motion
18 given to the band and rollers by means of a toothed wheel n which gears
directly with the upper rollers 1m and by means of the wheel 'n' with the
lower rollers The endless band receives its motion from the lower roller /
The toothed wheel n 18 intermittently turned by a pawl on a bell crank
lever which is connected to another bell ciank lever by a link q'. Motion
18 given to the lever by a cam r¹ on the shaft h The material is held in position
when the knives are in operation by a bais connected through a spring to a
slide which 18 secured by bars at each side of the machine to levers t
pivotted at t¹
The levers t receive motion from the shaft h through a link u
by means of a cam u¹.
+
The shaft receives its motion from the driven shaft through the pinion
which drives the pinion won the shaft y on which is another pinion y¹ gearing
with the pinion on the shaft h
Figure 4 shows an alternative way of carrying the knives
In this case a wheel A carries one or more groups of knives, each group con-
sisting of knives B parallel to the direction of the feed and the knife Cˇtians-
verse to it.
Figures 5, 6 and 7 illustrate another modification
Figure 5 is a side view, and Figure 6 18 a front view, of the wheel or drum of
a machine, and Figure 7 18 a side view of the machine showing the manner in
which the material is fed towards the drum
Dis the wheel or drum having one or more groups of knives each group con-
sisting of knives E parallel in the direction of the feed and a knife F transverse
to it
The material is fed onto an endless band G which conveys it to the rollers H
H and II These rollers may be driven intermittently as before if so desired.
In machines of this class the position and number of the knives may be varied
but one set of knives must be parallel to the direction of the feed and the other
Bet transverse to this direction.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that
what I claim is.―
1 In chaff cutting machines two sets of knives at right angles to each other
carried by a reciprocating frame which is at right angles to the direction of the
feed substantially as described.
2. In chaff cutting machines two sets of knives at right angles to each other

page_text: carried by a revolving wheel whose axis is parallel to the direction of the feed
substantially as described
3. In chaff cutting machines two sets of knives at right angles to each other
carried on the exterior of a revolving wheel substantially as described
4 Chaff cutting machines substantially as described and illustrated in the
drawing.