Improvements in Twist Lace Curtain Machines.
Year: 1892

page_text: Date of Application, 11th Jan., 1892
Complete Specification Left, 8th Oct., 1892-Accepted, 12th Nov.. 1892
PROVISIONAL SPECIFICATION.
Improvements in Twist Lace Curtain Machines.
I ERNEST JARDINE, of 19 Park Valley, in the Town and County of the Town
of Nottingham, Machinist, do hereby declare the nature of this invention to be as
follows:-
My invention has for its object such improvements in the trick bar motion, catch
bar motion, and feeding bar motion of twist lace curtain machines as will enable
them to produce better lace and to work steadier with less friction.
:-
These results are obtained by the improvements about to be described :-
I place a cam and lever at each end of the trick bar. By this arrangement the
bar is pulled each way and therefore does not buckle or bend as is the case when it
ushed.
attach spiral springs to levers on the catch bar shafts in such a manner that the
springs are opened as the carriages move from the extremities of their motion to
the centre and close as the carriages move from the centre of their motion to the
extremities.
I give the necessary motion to the feeding bar by means of a slotted crank or
disc, with suitable connections. The crank or disc is attached to the driving shaft
which makes twice the revolutions of the cam shaft.
Dated this Tenth day of January 1892.
ERNEST JARDINE..
COMPLETE SPECIFICATION.
Improvements in Twist Lace Curtain Machines.
I ERNEST JARDINE, of 19, Park Valley, in the Town and County of the Town
of Nottingham, Machinist, 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 :—
My invention has for its object such improvements in the trick bar motion, catch
bar motion, and feeding bar motion of twist lace curtain machines as will enable
them to produce better lace and to work steadier with less friction.
These results are obtained by the improvements about to be described which
relate to :-
The trick bar as hitherto constructed has been traversed or shogged to and fro
by a cam and lever working at one end of the trick bar. By this method the lever
pulls the trick bar one way and pushes it the other. When the bar is pushed it
buckles or bends and in consequence interferes not only with the proper working of
the guide bars which are supported by the trick bar, but also with the working of
the jacks or interceptors as they pass through the tricks. Thus producing faulty
Lace.
My improvement consists in placing a cam and lever at each end of the trick
bar. By this arrangement the bar is pulled each way and therefore does not
buckle or bend as is the case when it is pushed.
The guide bars and jacks are thus able to work freely and properly so that
perfect lace is produced right across the machine.
In an 8 point machine making lace 300" wide, as usually constructed, the bobbins
and carriages weigh about 450 lbs. The carriages (which contain the bobbins)
nove backwards and forwards through the warp and spool threads. The motion of
he carriages is similar to that of a pendulum moving in the segment of a 13" circle.
[Price 8d 1

page_text: one end of the machine. The springs & levers are applied to both ends of the
machine.
Fig. 7, Sheet 1, is part sectional elevation of a lace curtain machine showing
the usual method of actuating the feeding bar. E. is the feeding bar. A. the
feeding bar lever. B. the connecting link. F. the double action cam actuating
the lever G. H. is the spiral spring which keeps the lever truck I. up to the
cam F.
Fig. 8. Sheet 4. is part sectional elevation of a lace curtain machine showing my
improved method of actuating the feeding bar. E. is the feeding bar. B. the
connecting link. C. the slotted disc which gives the motion to the connecting
link B. A. the feeding bar lever. D. the axle on which one end of the link B.
works. The axle D. may be moved in the slot F. so as to give more or less motion
to the feeding bar E. through the lever A.
Fig. 9. is a plan showing my improved method of actuating the feeding bar.
Having now particularly described & ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is
1. The use of a cam & lever at each end of the trick bar.
2. The combination of levers & springs for balancing the catch bars substantially
as herein shown & described.
3. The combination and arrangement of the feeding bar motion as herein shown
& described & for the purpose stated.
Dated this 7th day of October 1892.
ERNEST JARDINE.