Improvements in or connected with Dobbies of Looms for Weaving.
Year: 1890

page_text: Date of Application, 21st Feb., 1890
Complete Specification Left, 20th Nov., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in or connected with Dobbies of Looms for Weaving.
We FRANK LEEMING, Machine Maker, and ROBERT WILKINSON, Overlooker both
of North Vale Works, Bradford in the County of York, do hereby declare the
nature of this invention to be as follows:-
This invention relates to improved construction, and combination of parts con-
nected with the dobbies, or shedding mechanism of looms for weaving, and consists
of an improved device for connecting the heald bands, and healds to the shedding,
or jack levers by means of which we obtain a true vertical lift of the healds.
According to this our invention on the pin in the end of the shedding, or jack
lever is mounted a combined connection, and guide, having a cam surface or slot
formed therein, one end of which is connected to the healds.
A cross shaft, or rod fixed to brackets on the loom frame, passes through the said
cam slot.
When the jack levers are operating, and raising, or lowering the healds, the
guides are also raised or lowered, and by reason of the cam slot, and fixed cross
rod are raised, or lowered in a perfectly vertical direction, and one of such guides,
and cam slots being attached to the end of each jack lever, the healds are raised,
and lowered vertically, and obtaining better practical results in the weaving than
heretofore.
Dated the 17th day of February 1890.
WALTER
BRIERLEY,
Central Chambers, Halifax, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or connected with Dobbies of Looms for Weaving.
We FRANK LEEMING, Machine Maker, and ROBERT WILKINSON, Overlooker both
of North Vale Works, Bradford in the County of York, 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 relates to improved construction and combination of parts con-
nected with the dobbies, or shedding mechanism of looms for weaving and consists,
of an improved device for connecting the heald bands, and healds to the shedding
or jack levers by means of which we obtain a true vertical lift of the healds.
According to this our invention on the pin in the end of the shedding or jack
lever is mounted a combined connection and guide, having a cam surface or slot
formed therein, one end of which is connected to the healds.
A cross shaft or rod fixed to brackets on the loom frame passes through the said
cam slot.
When the jack levers are operating and raising or lowering the healds the guides
are also raised or lowered, and by reason of the cam slot, and fixed cross rod is
raised, or lowered in a perfectly vertical direction, and one of such guides, and cam
slots being attached to the end of each jack lever, the healds are raised and lowered
vertically, and obtaining better practical results in the weaving than heretofore.
Snch being the nature and object of our invention, the following is a complete
description of same reference being had to the accompanying drawings in which :-
Fig. 1 is a side elevation of a shedding or jack lever and our improved device
for connecting the heald bands to same.
The several figs. on Sheet 2 are parts detached and drawn to an enlarged scale
(about full size) in order to clearly shew their construction.

page_text: According to this our said invention at or near the end of the jack or shedding
lever 1 is cast or formed the pin 2 as ordinary and to the pin 2 is hooked or other-
wise connected the guide or connecting link 3 which has formed in it the cam surface
or slot 4. The lower end 5 of the guide or connecting link 3 is attached by cord or
wire 9 to the heald stave in the ordinary way.
A cross shaft or rod 6, carried in a lug 7 the latter being adjustable in the slotted
bracket 8 fixed to the frame of the dobby, passes through the cam slot 4 in each of
the connecting links or guides 3 and is held at the opposite side of the dobby by a like
lug 7 and slotted bracket 8.
When the jack levers 1 are operating and raising or lowering the healds by means
.of the connections, the guides 3 being also raised or lowered and by reason of the
cam slots 4 and fixed cross rod or shaft 6 the cord or wire 9 and the healds are
raised or lowered with a true vertical motion. The jack lever 1 when lifting the
healds, rocks on its fulcrum stud 10 and the pin 2 moves in the direction shewn by
the dotted lines (see Fig. 1) and the fixed rod or shaft 6 acting on the cam slot 4 of
the guide or connecting link 3 causes the lower end 5 of the latter and also the cord
or wire 9 to move in the direction of the vertical dotted lines, and thus a true vertical
up and down motion or "lift" is imparted to the healds, and the warp threads are
prevented from coming in contact one with another, in a great measure obviating
breakage and obtaining better practical results than heretofore.
Having now particularly described and ascertained the nature and object of our
invention, and in what manner the same is to be performed and carried into
practice, we declare that what we claim is
The guide connecting link 3 having the cam surface or slot 4, rod or shaft 6 and
an adjustable lug such as 7 all in combination with a jack or shedding lever such as 1
as and for the purpose herein described and substantially as illustrated by the
annexed drawings.
Dated this 18th day of November 1890
FRANK LEEMING.
ROBERT WILKINSON.
By their Agent, Walter Brierley,
Central Chambers, Halifax.