Improvements, in loom shedding motions
Year: 1888

page_text: We, JOHN FERGUSON LEE, GEORGE CROLL, and PETER FORBES, of Lawside Foundry,
Lochee, in the County of Forfar, Engineers, do hereby declare the nature of this
invention to be as follows:-
:-
Our Invention of Improvements, in loom shedding motions, refers principally to
the simplifyng of the arrangement, and the method of changing from plain shedding
to twill shedding, and vice versa. All the wipers are on the loom wiper shaft; the
two leaf wiper when working, is fixed with a hollow key and revolves upon and with
said loom wiper shaft; the three or four leaf wiper, being worked at a reduced speed
runs loose on loom wiper shaft, and is driven by spur wheel gearing from a back shaft,
to be afterwards described.
When it is wanted to change from two leaf or plain, to a three or four leaf twill,
the two leaf wiper is pushed to one side clear of the treadles, and hard against the bush
bracket; the three or four leaf wiper is brought close up to it, and so held in position
on that side, when a saddle is dropped over shaft at the other side and the three or
four leaf wiper works between them.
A spur wheel is keyed on the loom wiper shaft outside the bush bracket, gearing
into another keyed on the outer end of the back shaft, giving a suitable reduced motion
to the back shaft.
Another spur wheel is keyed on the back shaft, gearing into another keyed on the
outer end of the three or four leaf wiper and transmitting the reduced motion of the
back shaft, to the three or four leaf wiper, which as before stated runs loose upon
the loom wiper shaft, and rotates upon it at a reduced speed.
The shedding motion is then communicated through treadles in the usual manner.
The back shaft can be drawn side ways in its two bushes and by this means the
wheels can be put in ; or taken out of gear.
It is held in position of "in gear" and "out of gear" by a pin through the bush
fitting into two grooves cut in the shaft one groove for holding "in gear
" and the
other groove for holding "out of gear."

page_text: When it is desired to change to plain shedding, we lift off the saddle before
mentioned; push the three or four leaf wiper to one side and into the position before
occupied by the saddle, drop the one or the two treadles, as the case may be, and bring
along the two leaf wiper and fix it with its hollow key; the back shaft is then drawn
out of gear as before described.
It is so arranged that the shifting always brings the wipers immediately over their
respective treadles, and drawing aside the back shaft puts the wheels in or out of gear,
as may be required.
The arrangement before described enables plain, or twill work to be done without
changing the treadles or fixing up an extra shaft.
The change in our method can be effected in a few minutes and no detaching of
treadles or other parts is necessary, and whatever change is made all the parts remain
in their respective places and attached to the loom.
Usually the loom has only two and three leaf wipers; but in exceptional cases where
it is required to have two, three, and four leaf, then the three and four leaf wipers are
made in halves and bolted together, to permit of their being readily exchanged; both
occupying the same portion of the loom wiper shaft when in working position.
All the treadles are made interchangeable, and the motion so constructed that it can
be applied to existing looms.
Dated this Twenty seventh day of February 1888.
GEO. C. DOUGLAS,
Agent for Applicant.

page_text: We, JOHN FERGUSON LEE, GEORGE CROLL, and PETER FORBES, of Lawside Foundry,
Lochee, in the County of Forfar, 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
-
Our Invention of Improvements, in Loom shedding motions, refers principally to the
simplifying of the arrangement and the method of changing from plain shedding to
twill shedding, and vice versa.
A part of a machine made with our improvements is represented on the accom-
panying sheets of explanatory drawings.
Figs. 1. and 2. (Sheets Nos. 1. and 2.) representing an elevation and plan
respectively showing the machine with the two leaf wiper in working position-the
three leaf wiper being shown out of gear.-. in the plan shows a section on the
line B. B. while D. shows a section on the line A. A. A.
Fig. 3. (Sheet No. 3.) is another plan to a different scale, showing the machine with
the three leaf wiper in working position, the two leaf wiper being out of gear.
In these drawings, the same reference numerals are used to mark the same or like
parts, wherever they are repeated.
All the wipers are on the loom wiper shaft 1., the two leaf wiper 2. when working,
is fixed with a hollow key, and revolves upon, and with said loom wiper shaft 1.; the
three or four leaf wiper 3.-in this case shown as a three leaf wiper-being worked at a
reduced speed, runs loose on loom wiper shaft 1. and is driven by spur wheel gearing
from a back shaft, to be afterwards described.
When it is wanted to change from two leaf or plain, to a three or four leaf twill,
the two leaf wiper 2. is pushed to one side-as shewn in Fig. 3. (Sheet No. 3.)-clear
of the treadles 9. and hard against the bush bracket, the three or four leaf wiper 3. is
brought close up to it, and so held in position on that side, when a saddle 11. is
dropped over shaft 1. at the other side, and the three or four leaf wiper works
between them.
A spur wheel 6. is keyed on the loom wiper shaft 1. outside the bush bracket 10.
Another spur
gearing into another 7. keyed on the outer end of the back shaft 8.
wheel 5. is keyed on the back shaft 8. gearing into another 4. keyed on the outer end
of the three or four leaf wiper 3. and transmitting the motion of the back shaft 8. to
the three or four leaf wiper 3. which as before stated, runs loose upon the loom wiper
shaft 1. and rotates upon it, and at a reduced speed.
The shedding motion is then communicated through the treadles 9. in the usnal
manner.
"
The back shaft 8. can be drawn sideways in its two bushes 12. and 13. and by this
means the wheels 5. and 7. can be put in, or taken out of gear. It is held in position
of "in gear
" and "out of gear by a pin 14. through the bush 13. fitting into two
grooves 15. and 16. cut in the shaft 8., one groove 16. for holding "in gear" and the
other groove 15. for holding "out of gear."

page_text: .
When it is desired to change to plain shedding we lift off the saddle 11. before
mentioned; push the three or four leaf wiper 3. to one side, and into the position
before occupied by the saddle 11., drop the one or the two treadles, as the case may be
and bring along the two leaf wiper 2. and fix it with its hollow key; the back shaft 8.
is then drawn out of gear, as before described.
It is so arranged, that the shifting always brings the wipers immediately over their
respective treadles, and drawing aside the back shaft, puts the wheels in, or out of
gear as may be required.
The arrangement before described, enables plain or twill work to be done without
changing the treadles, or fixing up an extra shaft.
The change in our method can be effected in a few minutes, and no detaching of
treadles or other parts is necessary, and whatever change is made all the parts remain
in their respective places, and attached to the loom.
Usually the loom has only two and three leaf wipers but in exceptional cases, where
it is required to have two, three and four leaf, then the three and four leaf wipers are
made in halves and bolted together, to permit of their being readily exchanged, both
occupying the same portion of the loom wiper shaft when in working position.
All the treadles 9. are made interchangeable and the motion so constructed, that it
can be applied to existing looms.
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.) The method of placing two sets of wipers upon the wiper shaft ; the one set
rotating with the loom wiper shaft, and the other set rotating upon said loom wiper
shaft, as herein-before described.
(2.) The combination of two, three or four leaf wipers, with saddle, back shaft and
treadles, in such a manner, that any of these sets of wipers may separately be brought
into working position as described.
(3.) The mode of attaching the several parts to the machine, so that the necessity of
completely removing them from the said machine may be avoided, as described.
Dated this 28th day of November 1888
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee,
Applicants' Agents.