IMPROVEMENTS IN LOOMS FOR WEAVING
Year: 1883

page_text: LETTERS PATENT to Frank Leeming Machine Maker and Robert Wilkinson
Overlooker both of Bradford in the County of York for an Invention of
IMPROVEMENTS IN LOOMS FOR WEAVING "
PROVISIONAL SPECIFICATION left by the said Frank Leeming and Robert
Wilkinson at the Office of the Commissioners of Patents on the 2nd May
1883.
T
FRANK 'LEEMING, Machine Maker, and ROBERT WILKINSON, Overlooker, both of
Bradford in the County of York. "IMPROVEMENTS IN LOOMS FOR WEAVING"
This Invention consists of improved mechanism for securing positive motion of
the healds for forming what is usually known as the Jacquard shed.
The main feature of this our improved mechanism consists of a lever composed
of two parts or lengths the pin or shaft which serves as fulcrum secures the two
parts in relative position to each other, the joint of the two parts composing the
said lever admits the necessary "play" or movement of the indicating part
occasioned by the action of the peg or other indicating apparatus One end of the
lever is attached to the ordinary jack for working the healds the other end of the
lever is provided with a spring and this end of the lever is operated by means of
peg barrel or other pattern mechanism-the two parts of the said lever are raised
and depressed positively and locked by means of cross bars and cross shafts caused
to reciprocate within elotted guides by means of T levers, crank and connecting
rod worked from the crank shaft
A modification of the said lever comprises one lever of the required length
having a moveable part acting on a second fulcrum.
If the apparatus herein described is to be employed for forming what is known
as centre shedding the indicated end of the lever must be arrow pointed in form so
as to admit of the cross bar operating on its upper or lower angled ends and a
double leg is provided for the other end of the lever for purpose of bringing the
healds to the centre.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frank Leeming and Robert Wilkinson in the Great Seal Patent
Office on the 2nd November 1883.
FRANK LEEMING Machine Maker and ROBERT WILKINSON Overlooker both of
Bradford in the County of York "IMPROVEMENTS IN LOOMS FOR WEAVING":
This invention consists of improved mechanism for securing positive motion of
the healds for forming what is usually known as the jacquard shed.
The main feature of this our improved mechanism consists of a lever composed
of two parts or lengths the pin or shaft which serves as fulcrum secures the two
parts in relative position to each other the joint of the two parts composing the
said lever admits the necessary "play or movement of the indicating part
occasioned by the action of the peg or other indicating apparatus.
"
One end of the lever is attached to the ordinary jacks for working the healds the
other end of the lever is provided with a spring and this end of the lever is
operated by means of peg barrel or other pattern mechanism, the two part of the
said lever are raised and depressed positively and locked by means of cross bars
and cross shafts caused to reciprocate within slotted guides by means of T levers
crank and connecting rod worked from the crank shaft.
A modification of the said lever comprises one lever of the required length having
"a movable part action on a second 'fulcrum.
If the Apparatus herein described is to be employed for forming what is known
as centre shedding the indicated end of the lever must be arrow pointed in form
so as to admit of the cross bar, operating on its upper or lower angled ends and
double legs are provided for the other end of the lever for purpose of bringing the
healds to the centre.
Such being the nature and object of this our said invention we will now proceed
to describe the same in detail and in order that the same may be fully understood
we have hereunto annexed 2 sheets of drawings in which
Fig. 1 is side elevation of dobby having our improvements applied thereto
Fig. 2 is end elevation of Fig.
Fig. 3 is side elevation (about half size) of lever shewing cross bars in section
Fig. 4 elevation lever, peg lags, shafts and knife or draw bars in section
Fig. 5 shews modification of lever
Fig. 6 shews lever having arrow shaped head forming centre shed
The main feature of this our improved mechanism consists of a lever A composed
of two parts or lengths B. C. the pin or shaft D serves as fulcrum and secures the
two parts B. C. in relative position to each other, the joints E. F. of the two parts
composing the said lever admits the necessary "play" or movement of the indi-
cating part C indicated or moved by the action of the peg G or other indicating
apparatus. Fig 4 shews by dotted lines the change of position of the parts
On the end H of the lever B is attached the ordinary jacks for working the
healds. the other end J of the lever C is provided with a spring K and this end
of the lever is operated by means of peg barrel G or other pattern mechanism,
the parts B. C. of the said lever are raised and depressed positively and locked
by means of the cross bars L. M, (N is a stop bar) caused to reciprocate within
slotted guides P. P by means of lever S connecting rods T W worked from the
crank shaft.
A modification of the said lever (see Fig. 5) comprises a lever I of the required
length having a movable part 2 acting or working on a second fulcrum 8 so as to
provide the necessary plav.

page_text: If the Apparatus berein described is to be employed for forming what is known
as centre shedding the indicated end C of the lever A (see Fig. 6) must be arrow
pointed in form so as to admit of the cross bar operating on its upper C¹ or lower C³
angled ends and double legs B¹ B are provided for the other end of the lever for
purpose of bringing the healds to the centre.
Having thus fully described the nature and object of this our said invention
together with the manner in which the same is to be or may be performed or
carried into practical operation we would have it understood that what we claim
as our invention is.
The use in combination of the parts B. C. constituting the improved lever having
"play" or loose joints E. F for purpose herein described and substantially as
illustrated by drawings
The modification of above lever as illustrated by Figs. 5 and 6 of the annexed
drawings and for purpose herein set forth
In Witness whereof I Frank Leeming for and on behalf of myself and the
said Robert Wilkinson have hereunto set my hand and seal this 31** day of
October in the year of our Lord one thousand eight hundred and eighty three.
FRANK LEEMING (L.B.)