Improvements in Loom Shedding Motions.
Year: 1892

page_text: Date of Application, 8th Dec., 1892
Complete Specification Left, 5th Sept., 1893-Accepted, 7th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Loom Shedding Motions.
I, JOHN EDWARD NUTTALL, of 186 Whalley Old Road, Blackburn in the
County of Lancaster, Overlooker, do hereby declare the nature of this invention to
be as follows:
This invention relates to improvements in the shedding mechanism or means for
operating and controlling the healds in looms for weaving, the object being to
dispense with the use of dobbies, or other like complicated and expensive mechanism
heretofore necessarily employed when weaving cross borders, or headings.
My invention consists in operating say four healds by means of two ordinary heald
shafts so arranged that the healds may be operated in pairs, that is two up and
two down together, or operated so as to cross, each heald being up and down
alternately.
According to this invention when four healds are employed I use two heald shafts,
the front and back, or outer healds, being connected by straps to say the upper
heald shaft, and the two inner healds are connected by straps to the lower heald
shaft. One of the heald shafts is driven in the ordinary way from the loom, and
the other is loose in its bearings, and it will be obvious that when the shafts rotate
in the same direction, the two back healds will be down, and the two front healds
up, or vice versa. If however say the shafts move in a reverse direction then
alternate healds will be moving up and down.
In order to drive the heald shafts in the same or reverse directions at will, I fix
on the driven shaft two small pulleys, corresponding pulleys being on the loose
shaft. One pair of the pulleys are connected by an open strap or belt, the other
pair by a crossed strap or belt. The pulleys on the loose shaft are loose on such
shaft, and between these pulleys is an ordinary double clutch free to slide on a key
on the loose shaft. When the clutch engages with one or other of the pullies on
the loose shaft, the latter is driven in one or other direction according as motion is
communicated by the crossed or open strap or belt.
The clutch is controlled by a fork mounted on a stud, and in the stem of the fork
is a slot which receives a pin fixed eccentrically in a disc. As the disc is turned on
its centre the eccentric pin moves the clutch to one side or the other as desired.
A lever and weight may be added to the disc so that the attendant on the loom by
simply moving the weighted lever to one side or the other can control the clutch
and consequently the healds as desired or necessary.
Dated this 7th day of December 180)
WALTER BRIERLEY,
Penny Bank Chambers, Halifax, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Loom Shedding Motions.
I, JOHN EDWARD NUTTALL of 186 Whalley Old Road, Blackburn in the
County of Lancaster, Overlooker do hereby declare the nature of this invention
and in what mauner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
This invention relates to improvements in the shedding mechanism, or means for
operating and controlling the healds in looms for weaving, the object being to
dispense with the use of dobbies, or other complicated and expensive mechanism
heretofore necessarily employed when weaving "cross borders," or "headings."

page_text: My invention consists in operating, say four healds by means of two ordinary
heald shafts so arranged that the healds may be operated in pairs, that is two up,
and two down together, or operated so as to cross each heald being up, and down
alternately.
Such being the nature and object of the said invention the following is a complete
description of same reference being had to the accompanying drawings forming a
part of this Specification in which :-
Fig. 1 is a front elevation of the improved mechanism for operating the healds.
Fig. 2 is an end view of the improved mechanism for purpose aforesaid.
According to this invention when four healds are employed I use two heald
shafts 1. 2. the front, and back, or outer healds being connected by straps 3. 3 to
the dolls heads on say the upper heald shaft 2, and the two inner healds are
connected by straps 4. 4. to the dolls heads on the lower heald shaft 1. One of
the heald shafts 1 is driven in the ordinary way from the loom, and the other shaft 2
is loose in its bearings, or brackets. The front and back healds are by the
straps 3. 3 connected to opposite sides of the dolls heads on the shaft 2 as are also
the inner healds by the straps 4. 4 to the shaft 1, and it will be obvious that when
the shafts 1. 2 rotate in the same direction the two back healds will be down, and the
two front healds up, or vice versa. If however the shafts 1. 2 rotate in a reverse
direction then alternate healds will be moving up and down.
In order to drive the heald shafts 1. 2 in the same, or reverse directions at will, I
fix on the driver shaft 1. two small pulleys 5. 6 corresponding pulleys 7. 8 being on
the loose shaft 2. One pair of the pulleys 6. 8 is connected by an open strap or
belt 9, the other pair 5. 7 by a crossed belt, or strap 10. The pulleys on the
loose shaft 2 are themselves loose on such shaft, and between these pulleys 7. 8 is
an ordinary double clutch 11. free to slide on a key 12 on the loose shaft 2. When
the clutch 11 engages with one or other of the pulleys 7. 8 on the loose shaft 2 the
latter is driven in one or other direction according as motion is communicated by
the crossed or open belt or strap.
The clutch 11 is controlled by a fork 13 the cross head 14 of which is mounted
and free to slide in the frame 15 fixed by bracket 16 (see Fig. 2) to the top rail of
the loom. In the stem 17 of the fork 13 is a slot 18 which receives a pin 19 fixed
eccentrically in a disc 20. The disc 20 is carried in the frame 21 and as the said
disc 20 is turned, or partially turned round in the frame 21 the eccentric pin 19
acting on the slot 18 moves the fork 13 and clutch 11 to one side or the other as
desired. A lever 22 and weight 23 may be added to the disc 20 so that the
attendant on the loom by simply moving the weighted lever 22 from one side to
the other can control the clutch 11 and consequently the healds as desired or
necessary.
Having now particularly described and ascertained the nature and object of the
said invention, and in what manner the same is to be performed I declare that
what I claim is :-
1. The improved shedding mechanism wherein the heald shafts are driven in
the same or reverse directions as and for the purpose herein fully described.
2. The heald shafts 1. 2 crossed and open belts or straps 9. 10 clutch 11
fork 13, and eccentric pin 19 all in combination, and as and for the purpose herein
fully described and as illustrated by the accompanying drawings.
3. The general, construction, arrangement and combination of parts constituting
the improved shedding mechanism as and for the purpose herein described and as
illustrated by the accompanying drawings.
Dated this 4th day of September 1893.
JOHN EDWARD NUTTALL,
By his Agent, Walter Brierley,
Penny Bank Chambers, Halifax.