Improvements in Tappets or Treading Motions for Looms.
Year: 1891

page_text: Date of Application, 29th Dec., 1891
Complete Specification Left. 21st Sept., 1892-Accepted, 22nd Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Tappets or Treading Motions for Looms.
I, HUGH ROBERT Ross, of Bloomfield, Belfast, in the County of Antrim,
Ireland, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention is designed to provide a tappet motion for looms, where the
design differs at intervals in the length of the cloth, which can be readily altered
or adjusted by the weaver in charge without much physical labour.
The tappet is constructed with a number or series of bowls or runners of different
widths mounted upon spindles whose position on the spindles is determined by the
pattern to be produced. The position of each bowl upon its spindle can be set or
varied and the several spindles with their sets of bowls are linked together by
chains or the like and pass round or over star or other wheels which will carry
round the chains as they revolve.
The wheels or devices which carry the spindles and sets of bowls are mounted
upon or affixed to a shaft carried in bearings on a suitable framing and space or
room is provided between the sides of the frame to allow the shaft to move longi-
tudinally a limited distance. The shaft and with it the bowls are rotated by a
bevel or other gear wheel fitted with a sliding key or feather so that the shaft can
be moved to and fro therein.
On one end of the shaft is placed a grooved bush or washer with which the end
of a pivoted lever engages and by which the shaft is moved to and fro. The pivoted
lever is connected to a handle and quadrant so that the tappets can be readily
moved and removed and placed in any desired position.
The tappet levers by which the healds are actuated are pivoted on a spindle
either above or below the tappets preferably above and are cranked or bent to
bring the ends to a position below the centre of the tappets. The end of each
of these pivoted levers is connected by a link or similar device to a second pivoted
lever one end of which is attached to a spring and the other connected with the
healds.
The levers are lifted or disengaged from the tappet by a cross foot lever or
treadle when it is desired to change the position of the tappet onto another pattern
or weave. As the whole movement is so easily and quickly done it is only necessary
to stop the loom for a very short time to effect the change.
Instead of or in addition to moving the shaft carrying the tappets to and fro to
bring the levers over the desired set of bowls or tappets the shaft which carries the
levers may be moved to and fro and the levers moved to the desired position over
the tappet bowls.
A bracket with a series of hooks or pins may be affixed to the back of the
framing the springs which hold down the ends of the second pivoted levers being
affixed thereto.
1
1001
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Tappets or Treading Motions for Looms.
I, HUGH ROBERT Ross, of Bloomfield, Belfast, in the County of Antrim,
Ireland, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to looms wherein are woven towels or other cloths the
designs of which-such as for borders or the like-differs or is altered at intervals
in the length of the cloth, and is designed to provide a tappet motion which can be
readily changed or adjusted as desired by the operative in charge without entailing
much physical labour; and without the necessity of stopping the loom to effect the
desired change or alteration of the motion.
This invention will be fully described with reference to the accompanying
drawings which show the tappet removed from the loom.
Fig. 1. side elevation.
Fig. 2. plan.
Fig. 3. elevation from the front.
- Fig. 4. elevation from the back.
The tappet is constructed with a number or series of bowls or discs A mounted
to rotate on spindles B which are connected together by a chain or links C. The
bowls A may be of different widths as required and are spaced at different intervals
apart upon their spindles the width of the bowls A and their position on the
spindles B being determined by the pattern to be produced. The position of each
bowl upon its spindle can be set or varied and the several spindles B with their sets
of bowls A are linked together into a chain and are mounted on star or'other
whicels D in the usual way the wheels being keyed or otherwise affixed to a rotating
shaft E from which motion is conveyed to the chain and they are carried round as
the shaft rotates.
.
The shaft E upon which the star or other wheels D-which carry round the
bowls A and spindles B-are mounted and fixed is carried in bearings in a suitable
frame F. A space is provided between the sides of the frame F and the star
wheels D to allow of a to and fro 'movement thereof for a limited distance longi-
tudinally of the shaft.
The shaft E and with it the wheels D and the bowls A are actuated by or
receive motion from a bevel or other gear wheel G fitted to one end of the shaft by:
a sliding key or feather so that the shaft can slide to and fro therein.
On the other end of the shaft E is placed a grooved bush or washer H fixed
thereto with which the end of a lever I engages.
.
The lever I is pivoted on the pin or stud i upon which it can he moved. The
other end of the pivoted lever I is connected with a quadrant lever or handle J
hinged or pivoted at j and moving in a quadrant K. The lever I is moved about
its pivot by moving the quadrant lever or handle J and the movement of the
lever I moves the bush H with which it engages and with it the shaft E and the
bowls and spindles carried thereby. By the movement therefore of the handle J
the tappet can be easily and readily moved and placed in any desired position
between the supporting side frames F.
t
The tappet levers L by which the healds are actuated are pivoted on a spindle M
cranked or bent as shown to bring the ends below the shaft E. The end of each of
the tappet levers L is connected by a link or connecting piece N to a second
lever pivoted on the spindle P one end of each of the levers O being connected
to the healds by the cords o and to the other end o¹ is attached a spring R by
which they are held down and the front end of the tappet levers L held against
the bowls A as they revolve.

page_text: A bracket S with a series of books s or pins is affixed to the back of the framing
to which the springs R are attached which hold down the ends o¹ of the levers O.
Instead of or in addition to moving the tappet shaft E to and fro to bring the
desired bowls A under the levers L, the shafts M and P carrying the levers L may
be moved to and fro over the desired bowls A.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. A tappet or treading motion for looms having the bowls or tappets mounted
on a sliding shaft whereby they can be moved to one side or the other to bring
different sets into operation or into contact with the levers, and mechanism for
readily moving or altering the position of the tappets substantially as described.
2. In a tappet or treading motion for looms the combination with the revolving
bowls or discs carried on spindles and actuated by star wheels, of the sliding shaft
by which they are moved to and fro and the pivoted lever and quadrant lever or
handle by which the position of the shaft is adjusted substantially as and for the
purposes described.
3. A tappet or treading motion for looms constructed and arranged substantially
as described and shown.
lני
1
Cab 1000