An Improved Stopping Arrangement for Screw Gills in Machinery as used for Flax, Hemp, Jute, and other Fibres.
Year: 1892

page_text: Date of Application, 8th Aug., 1892
Complete Specification Left, 5th May, 1893-Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
An Improved Stopping Arrangement for Screw Gills in Machinery
as used for Flax, Hemp, Jute, and other Fibres.
We ROBERT HENRY READE, Managing Director of the York Street Flax
Spinning Company Limited, Henry Street, Belfast, County Antrim, and HUGH
MC KIBBIN, Foreman Mechanic, York Street Flax Spinning Company, aforesaid,
do hereby declare the nature of this invention to be as follows:-
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In screw gill machinery for flax, hemp, jute, and other fibres where the screws
which drive the fallers and gills are actuated from a common shaft, it is usual to
provide a "pitch" pin that is cut whenever a "stick or "jam" takes place, and
so that part of the machine is stopped, or instead of the pitch pin, the driven
pinion on the shaft is held in position by a nut that slips, or is unscrewed when the
load is increased.
"
In frames with more than one head, the "pitch pin" must necessarily be strong
enough to drive all the heads in their normal condition, so when a
""stick' or
"jam" in the fallers takes place, the extra friction caused by the "stick"
"jam," has to be strong enough to cut the pin or unscrew the nut which drives all
the heads in the frame.
or
In some constructions of screw gill machinery, a subsidiary back shaft to drive
the screws in each head is introduced and these subsidiary shafts are connected to
the main shaft by spur gearing and a "pitch pin," which is of the strength
sufficient to drive each head.
This improved stopping arrangement consists in using two "pitch pins" to each
head, these "pitch pins" connect the screw to the back shaft; the bevel pinions
on the screws gearing into bevels on flanged sockets, which flanged sockets are
attached to the back shaft. The flanged sockets and the bevels thereon are con-
nected by means of "pitch pins" which can be light, each one having to drive
only half the head of screws, and whenever one of these "pitch pins" is cut, the
other is also severed, and so the connection between that particular head and the
back shaft is broken, whenever a "jam" or obstruction takes place in the working
of the fallers or screws.
When the obstruction is removed the screws are readily reset into their working
position, by turning the wheels upon the socket, until the holes for the "pitch
pins" are opposite each other, so that new pitch pins can be inserted.
“
49
Marks on the adjacent surfaces of the flanged socket and boss of bevel thereon,
indicate when the holes are opposite.
A distinct advantage of this improved arrangement for stopping each head of
screw gill machinery independently, is the facility with which the flanged sockets
and double pitch pins can be applied to existing machines.
Dated this 5th day of August 1800
R. H. READE.
HUGH MCKIBBIN.
COMPLETE SPECIFICATION.
An Improved Stopping Arrangement for Screw Gills in Machinery
as used for Flax, Hemp, Jute, and other Fibres.
We, ROBERT HENRY READE, Managing Director of York Street Flax
Spinning Company Limited Belfast and HUGH MCKIBBIN, Foreman Mechanic, in
5 the employment of the said Company do hereby declare the nature of this invention
[Price 8d.1

page_text: and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
"
In screw gill machinery. for flax, hemp, jute, and other fibres where the screws
which drive the fallers and gills are actuated from a common shaft, it is usual to
provide a "pitch pin" that cuts whenever a "stick or "jam" takes place, and so
that part of the machine is stopped; or, instead of the "pitch pin the driven
pinion on the shaft is held in position by a nut that slips or unscrews when the
. load is increased.
"
In frames with more than one head the "pitch pin "must necessarily be strong
enough to drive all the heads in their normal condition, so when a
stick or
jam" in the fallers takes place the extra friction caused by the "stick" or
jam
"has to be strong enough to cut the pin or unscrew the nut which drives all
the heads in the frame.
In some constructions of screw gill machinery a subsidiary back shaft to drive
<the screws in each head is introduced, and these subsidiary shafts are connected to
the main shaft by spur gearing and a "pitch pin" which is of the strength
sufficient to drive each head.
:
This improved stopping arrangement is illustrated in the drawing herewith, in
which
Fig. 1 is a top view of part of screw gill frame sufficient to shew the applica-
tion, and Fig. 2 is a detached and enlarged view of parts.
The same letters & figures of reference apply to the same or like parts in the
drawings.
2
This improved stopping arrangement consists in using two "pitch pins" (a) and
flanged sockets (d) to each head, in manner following,-These "pitch pins" (a)
"connect the screws (b) to the back shaft (), the bevel pinions (') on the screws ()
gearing into bevels (e) on flanged sockets (d), which flanged sockets (d) are
attached to the back shaft (). The flanged sockets (d) and the bevels (1) thereon
are connected by means of "pitch pins" (a), which can be light, each one having
to drive only half the head of screws (6), and whenever one of these "pitch
pins" (a) is cut, the other is also severed, and so the connection between that
-particular head and the back shaft (e) is broken whenever a "jam" or obstruction
takes place in the working of the fallers (ƒ) or screws (b).
When the obstruction is removed the screws (/) are readily reset into their
working position by turning the wheels (c) upon the socket (d) until the holes for
the "pitch pins" (a) are opposite each other, so that new "pitch pins" (a) can be
inserted marks on the adjacent surfaces of the flanged socket (d) and boss of
the bevel (c) thereon indicate when the holes are opposite.
. A distinct advantage of this improved arrangement for stopping each head of
screw gill machinery independently, is the facility with which the Hanged sockets
,and double "pitch pins" can be applied to existing machines.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed and carried into practice,
we declare that what we claim is :-
In screw gill machinery as used for flax, hemp, jute, and other fibres the applica-
tion or use of two 66
pitch pins" and flanged sockets to connect the back shaft to
-each head of screws and fallers, in the manner and for the purpose herein described
and illustrated.
Dated this 3rd day of May 1902
R. H. READE.
HUGH MCKIBBIN.