Improvements in Knotting Apparatus, Applicable to Harvesting Machines and Straw Trussers.
Year: 1888

page_text: .
Improvements in Knotting Apparatus, Applicable to Harvesting
Machines and Straw Trussers.
We, JAMES HORNSBY, JOHN INNOCENT, ISAAC TROLLEY and ROBERT TROLLEY,
all of Spittlegate Iron Works, Grantham, in the County of Lincoln, Engineers, do
hereby declare the nature of this invention to be as follows:-
This invention has for its object improvements in knotting apparatus applicable to
harvesting machines and straw trussers.
Our knotting apparatus in its main features resembles the well known Appleby
knotter-like this instrument it has (1)-a rotating knotting hook carried in bearings
in a stationary frame, (2)-a retainer or gripper which holds the string whilst the knot
is tied; this is carried in a swinging frame jointed to the first mentioned frame, and
(3)-a cutting apparatus by which the string is severed.
Our improvements relate especially to the parts in connection with the retainer or
gripper we control the swinging frame in the same way as it is controlled in the
Appleby knotter namely by a cam so formed that the retainer or gripper is permitted
to advance towards the knotting hook when the hook winds up the string to form the
knot whilst at other times the swinging frame with the retainer or gripper is
prevented from yielding or advancing towards the knotting hook however tightly. the
string may be strained.
We actuate the retainer or gripper which is carried as above stated on a positively
controlled swinging frame by teeth upon the cam disc on the knotter shaft and we set
these teeth eccentric to the shaft and concentric with the joint pin which connects the
two frames. The teeth drive a bevelled pinion on an axis carried by the swinging frame
and this axis by means of a worm and worm wheel rotates the notched disc of the
retainer.
We would state that the notched disc has before been driven by a worm, worm
wheel and pinion but only in arrangements which do not admit of the swinging frame
being positively controlled so that the retainer or gripper may advance towards the
knotting hook but only at the proper time and to the right amount to supply the
string which the hook requires to produce the knot.
D L 1 1
1
CT11000
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page_text: Improvements in Knotting Apparatus, Applicable to Harvesting
Machines and Straw Trussers.
We JAMES HORNSBY, JOHN INNOCENT, ISAAC TROLLEY and ROBERT TROLLEY,
all of Spittlegate Iron Works, Grantham in the County of Lincoln Engineers 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:
This invention has for its object improvements in knotting apparatus applicable to
harvesting machines and straw trussers.
Our knotting apparatus in its main features resembles the well known Appleby
knotter like this instrument it has (1) a rotating knotting hook carried in bearings
in a stationary frame (2) a retainer or gripper which holds the string whilst the knot
is tied, this is carried in a swinging frame jointed to the first mentioned frame and
(3) a cutting apparatus by which the string is severed.
Our improvements relate especially to the parts in connection with the retainer or
gripper we control the swinging frame in the same way as it is controlled in the
Appleby knotter, namely by a cam so formed that the retainer or gripper is permitted
to advance towards the knotting hook, when the hook winds up the string to form the
knot, whilst at other times the swinging frame with the retainer or gripper is prevented
from yielding or advancing towards the knotting hook however tightly the string may
be strained.
We actuate the retainer or gripper which is carried as above stated on a positively
controlled swinging frame by teeth upon the cam disc on the knotter shaft, and we set
these teeth eccentric to the shaft and concentric with the joint pin, which connects the
two frames. The teeth drive a bevelled pinion on an axis carried by the swinging frame,
and this axis by means of a worm and worm wheel, rotates the notched disc of the
retainer.
We would state that the notched disc has before been driven by a worm, worm
.wheel and pinion, but only in arrangements which do not admit of the swinging
frame being positively controlled, so that the retainer or gripper may advance
towards the knotting hook, but only at the proper time and to the right amount
to supply the string which the hook requires to produce the knot.
In order that our said invention may be fully understood and readily carried into
effect we will proceed to describe the drawings hereunto annexed.

page_text: Figure 3 is an end elevation of the frame with the operative parts removed.
Figure 4 shews separately the knotting hook with its spindle.
a is the knotter axis and b a stationary frame on this axis, and in which it revolves,
c is a swinging frame jointed to the frame b at c'.
d is the knotter wheel or cam fixed on the axis a. e is the knotting hook and e¹ the
pinion upon its axis by which it is driven. fis the gripper disc and f¹ the presser, it is
held up to the gripper by a spring f. is a worm pinion on the axis of the gripper
disc. is an axis carried in bearings on the swinging frame c (which also carries the
gripper) it has upon it a worm g' and a pinion g². h is a lever carrying a knife h¹.
The knotter wheel or cam d has upon it teeth d' which rotate the pinion e¹ at the
time when the knotting hook produces the loop. The cam d also has other teeth d'
which do not radiate from the axis a, but are adapted to work with the pinion g' and
allow its axis simultaneously to move around the centre c¹ d³ is a cam groove, which
controls the knife and causes it to cut the string at the proper moment.
d is a cam on the boss of the cam wheel d a roller on the frame c bears
against it and consequently the position of the frame c depends on the form of the
cam.
i is a spring incline which controls the moveable jaw of the knotting hook-it is
unnecessary here to describe in detail the process of forming a knot for this is as here-
tofore, and is well understood it is sufficient to say that when the knotting hook
revolves to form the loop and whilst the string is held fast by the gripping appliance
the cam d allows the frame c to swing as the drawing indicates and in such manner
as to supply the necessary length of string to the knotting hook. The main feature of
novelty is that the centre c¹ about which the swinging frame moves is so located in
relation to the centre of the axis a that the axis g on the frame c which transmits
movement to the gripping disc can be driven by teeth d² which are carried around
with the axis a.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner, the same is to be performed we declare that what we
claim is:-
1. In knotting apparatus substantially as described in which the gripping appliance
is carried upon a swinging frame, jointed to another frame carrying the knotting hook,
transmitting motion both to the gripper disc and to the knotting hook by means of
téeth carried round with the knotter axis.
2. Knotting apparatus substantially as represented by the annexed drawings.