Improvements in Looms for Weaving.
Year: 1894

page_text: Date of Application, 3rd Mar., 1894-Accepted, 14th Apr., 1894.
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COMIDELE DE MOLTIVATION
Improvements in Looms for Weaving.
JAMES GREGSON of the Firm of Gregson & Monk, Vulcan Iron Works
Preston, Machinists and Loom Makers in the County of Lancaster, 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 of Improvements in Looms for Weaving relates to means for altering
and adjusting the position of the crank and tappet wheels relatively to the "pick."
In existing arrangements the crank and tappet wheels are made fixtures upon their
respective shafts, and the teeth of the wheels at the point which receives the shock
caused by the "pick" or cam striking the picking bowl wear away and cause.
considerable trouble and loss by the breaking of the wheel teeth where partially
worn through.
Moreover in weaving the finer kinds of cloth or more particularly to looms that
are required to run at a great speed, the setting of the wheels to the crank and
slay for picking require more accurate adjustment than results from the moving
forward or backward of one of the wheels to the extent of one tooth which for fine
work or high speeded looms produces too great an alteration one way or the
other.
According to my invention either or both the crank and tappet wheels are so
mounted upon their respective shafts as to be capable of being moved round there-
upon the wheel bosses being provided with bevil wheels or external & internal
wheels which meet or engage with corresponding bevil wheels, or external and
internal bevil wheels fastened upon the shafts. The bevil wheels or external and
internal wheels are drawn together for locking the wheel when set in position
and secured by screw bolts and nuts in the usual or any convenient manner.
Thus upon the screw bolts being loosened, the wheels can be drawn out of gear,
and turned round upon their shafts to any desired position thereby permitting of
the most exact and accurate adjustment, and it will be obvious that the relative
position of the wheel teeth may be readily and quickly altered, thereby allowing
the wear and tear caused by the striking of the pick at a given point to be
distributed from time to time over all the teeth of the wheels, and so reduce the
liability to breakage.
One of the most valued improvements in this invention is having bevilled wheels,
and external wheels which allows the two turned surfaces to be drawn together.
In clutch boxes this cannot be well done to both hold the teeth firmly together
and have the facings bolted together. In the clutch box arrangement the wheels
and the bosses are always breaking and causing much damage to the loom on
account of not having turned surfaces, and when the wheels were drawn together
there was a space between the wheel and the boss which caused one of the clutch
boxes to break. The surfaces could not be drawn together as named above on
account of having the wheels bolted so firmly together, and no adjustment could be
obtained in the teeth. Now in the new system of bevil wheels, and internal wheels,
the faces can be drawn firmly together and at the same time the wheels are firmly
locked as named above. It will be understood that these wheels being connected
by this invention, a more firm and steady motion is obtained in the driving and
picking of the loom, the shuttle is driven more accurately across the loom, thereby
preventing many accidents in shuttles flying out; it is also a great saving in wear
and tear and in the time that is usually required when the wheel teeth of the old
system are broken or badly worn to take them off and readjust the loom.

page_text: This invention is to enable the crank and tappet wheels to be removed more
readily and safer to any position on the crank and tappet shaft ends, giving greater
and more careful regulation to the picking and running of the loom and may be set
with the greatest accuracy.
Another great advantage is that the overlooker can change the position of the
wheel teeth at any time without disturbing the picking tappet shafts or crank shafts
when they are in a good position for working, they are also a very great saving to
the manufacturer the wheels lasting much longer as all the teeth round the wheel
may be used for picking purposes the picking teeth being the parts which wear and
break the most.
In order that this invention may be fully understood, and carried into operation
I describe the accompanying drawings. In the different views similar parts are
marked with corresponding letters of reference.
Figure 1 Sheet 1 is a side elevation of the loom showing the crank and tappet
wheels in position. A is the crank wheel and B is the tappet wheel.
Figure 2 Sheet 1 are the same wheels showing the opposite side, with the bevil
clutch wheel.
Figure 3 Sheet I shows the boss with the bevil clutch wheel combined.
The boss of the wheel is made parallel, and the holes of the wheel being made to
suit the boss. To place the wheels in position for working Figure 3 Sheet 1
namely the boss and bevil clutch wheel marked C is placed upon the respective
crank and tappet shaft ends, and fastened by a key.
The wheels A and B Figures 1 and 2 Sheet 1 are then placed upon the boss and
drawn together by means of screw bolts, or forced together by the washer and nuts
at the end of the crank and tappet shafts. In Figures 2 and 3 Sheet 1 you will
notice the turned circular surfaces marked D and on account of the wheels being
made bevil instead of the clutch box principle, the two turned surfaces can be
drawn firmly together, and by this means the wheel runs much truer and prevents
the bosses and the wheels from breaking as in the old system the clutch box
arrangement would not permit of turned surfaces being put on.
Figure 4 Sheet 2 shows crank and tappet wheel with the internal wheel
arrangement applied for locking purposes.
Figure 5 Sheet 2 shows the boss with the external wheel applied.
The fitting together of these wheels is done in precisely the same manner as the
bevil wheels for locking purposes previously described. By the internal wheel or
external, it allows the two circular turned surfaces marked D to be screwed up
firmly together which is one of the great advantages in this invention, causing the
wheel to run truer and preventing breakage; the bevil wheels and internal wheels
being used for adjustment and locking the wheel into position.
The fine adjustment of the wheels is obtained through the teeth of the internal
and external wheels or the bevil wheels being much finer and having a greater
number of teeth than the teeth of the crank and tappet wheels.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner same is to be performed I declare that what I
claim is :-
The use or employment of bosses with bevil wheels or internal or external wheels
with turned circular faces to engage in similar bevil wheels internal or external
wheels, constructed and arranged substantially as described and shown in the
drawings.
Dated this 1st day of March 1894