IMPROVEMENTS IN TREADING MOTIONS FOR LOOMS
Year: 1887

page_text: Date of Application, ith June, 1887.
Complete Left, 10th Aug., 1887.
Complete Accepted; 16th Sept., 1887
ROBERT HALL of Hope Foundry Bury in the County of Lancaster Engineer do
hereby declare the nature of said Invention for IMPROVEMENTS IN TREADING MOTIONS
FOR LOOMS which Invention has been partly communicated to me from abroad by
Edward Grube of Hamburg in the Empire of Germany Engineer and is partly my
own Invention, to be as follows :-
This invention relates to improvements in treading motions for looms and its object
is to simplify and improve the mechanism and to actuate the treadles positively in a
more simple manner than now customary.
The apparatus consists of a number of tappet plates on which are narrow projecting
ribs or flanges these plates are mounted on pins or studs which pass through them and
are secured to the frame of the apparatus which is stationary; the treading motion is
-driven from a pin secured eccentrically to the face of a toothed wheel driven from a
gear on the crank or other shaft a rod pivoted at one end to the eccentric pin is
connected to one end of a rocking lever secured to or pivoted near its centre on a
stud or pin supported at each end in the frame the other end of the rocking lever
carries a pin supported also at its other end by a link secured to the stud on this pin
are mounted loosely a number of levers or rods one for each treadle these levers are
connected to a series of pendulum levers the pendulum levers are pivoted at one end
to the treadles and at the other end they carry bowls which lie between the tappet
plates and below their upper flanges.
When the treadles are horizontal or thereabouts midway between their highest and
lowest position the pendulum levers hang vertically over the centre of the frame.
The risers which act also as fallers are mounted on pins supported by the frame
each riser has a heel piece which rests upon a projection on a small lever the levers
being also mounted on pins supported by the frame; springs or weights are arranged
to keep down the small levers on to the pattern card barrel and the projections on the
small levers bearing against the heel pieces hold the front end of the risers normally

page_text: up so that as the pendulum lever moves its bowl passes under the riser and lowers its
treadle and this continues until one of the lags of the pattern chain comes under one
of the small levers and raises it when the riser released by such lever falls thus allowing
the bowl to travel over it and below the flange on the tappet plate and raise its treadle;
as soon as the lag on the chain has passed from under the small lever the spring or
equivalent acts upon the lever so that when the bowl has passed to and fro on the
riser the spring draws the lever into its normal position and its projection acting on
the heel of the riser raises its front end where it remains until the pattern chain again
acts upon its small lever as before described.
This improved treading motion which is positive in its action can be operated by
one pattern chain and barrel driven by a pin and star wheel or otherwise and it can
be secured to the side top or lower portion of the loom.
This invention is also applicable to dobbies for operating the healds.

page_text: Improvements in Treading Motions for Looms.
I ROBERT HALL of Hope Foundry Bury in the County of Lancaster Engineer
do hereby declare the nature of said Invention for IMPROVEMENTS IN TREADING
MOTIONS FOR LOOMS which Invention has been partly communicated to me from
abroad Edward Grube of Hamburg Engineer and is partly my own Invention, and
in what manner the same is to he performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to improvements in treading motions for looms and its object
is to simplify and, improve the mechanism and to actuate the treadles positively in a
more simple manner than now customary.
I attain this object by the arrangement of mechanism illustrated by the accompanying
three sheets of Drawings in which
Figure 1 is a side elevation Figure 2 a front elevation and Figure 3 a plan of part
of a loom fitted with the improved treading motion.
The apparatus consists of a number of tappet plates a on which are narrow
projecting ribs or flanges a¹ shown best in Figure 2; these plates are mounted on
pins or studs b which pass through them and are secured by nuts 6' to the frame c
of the apparatus which is stationary being secured to the loom frame by bolts or
studs x.
The treading motion is driven from a pin d secured eccentrically to the
face of a toothed wheel d¹ mounted on a stud d and driven from a gear e on the
crank shaft e or other convenient shaft of the loom; a rod f pivoted at one end of
the eccentric pin d is connected to one end of a rocking lever g secured to or pivoted
near its centre on a stud or pin g' which is supported at each end in the frame c; the
other end of the rocking lever carries a pin g' supported also at its other end by a
link secured to the stud g¹ and on this pin g² are mounted loosely a number of levers
or rods i one for each treadle these levers i are connected at k¹ to a series of pendulum
levers which pendulum levers are pivoted at one end to the treadles and at the
other end they carry bowls which lie between the tappet plates a and below their
upper flanges a'; the treadles are pivoted to the frame on a stud 1.
خو
When the treadles are horizontal or thereabouts midway between their highest and
lowest position the pendulum levers k hang vertically over the centre of the frame.
The risers which act also as fallers are mounted on pins m supported by the frame c
and each riser has a heelpiece which rests upon a projection n' on a small lever n
the levers n being also mounted on pins supported by the frame c; springs or
weights p secured at one end to projections on the tappet plates a are arranged to
keep down the small levers n on to the pattern card barrel and the projections n' on
the small levers bearing against the heel pieces hold the front end of the risers.
normally up so that as a pendulum lever k moves its bowl k² passes under its riser
and lowers its treadle ; and this continues until one of the lags of the pattern chain
comes under one of the small levers n and raises it when the riser released by such
movement of the lever n falls thus allowing the bowl k³ to travel over it and below the

page_text: flange a' on the tappet plate a and raise its treadle j; as soon as the lag on the chain q
has passed from under the small lever n the spring p or equivalent acts upon the
lever n so that when the bowl has passed to and fro on the riser ? the spring p
draws the lever n into its normal position and its projection n¹ acting on the heel 71
of the riser raises its front end 7 where it remains until the pattern chain q again acts
npon its small lever n as before described.
This improved treading motion which is positive in its action can be operated by
one pattern chain and barrel driven by a pin and star wheel s as shown or otherwise
and it can be secured to the side top or lower portion of the loom.
This invention is also applicable to dobbies for operating the healds.
Having now particularly described and ascertained the nature of this said Invention
and in what manner the same is to be performed I declare that what I claim is―
1. The combination with a series of pendulum levers suspended from the treadles
and rocked by suitable mechanism of a series of pivoted levers each of which is
arranged to act either as a riser or faller as required said pivoted levers being actuated
by a second series of pivoted levers connected to springs or equivalents and operated
by the lags of a pattern chain or other suitable means substantially in the manner
and for the purposes herein described and as illustrated by the accompanying
drawings.
2. The construction combination and arrangement of parts constituting the
improved treading motion for looms substantially as and for the purposes herein
described and as shown.