Improvements in Pattern Cards or Chains for Looms.
Year: 1896

page_text: Date of Application, 9th Nov., 1896-Accepted, 12th Dec., 1896
COMPLETE SPECIFICATION.
Improvements in Pattern Cards or Chains for Looms.
We, SAMUEL CHARTERIES and ROBERT SPENCE, both of Rosefield Mills,
Dumfries, in the County of Dumfries, Manufacturers, 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 which relates to pattern cards or chains used in looms for
controlling the picking and shuttle box actuating mechanism and also for con-
trolling the Jacquard or Witch mechanism has for its object to permit of readily
altering the pattern by detaching and replacing any number of the cards, lags or
bars of which the chain is composed, instead of making the lags with removable
pegs and having the lags permanently joined as usual to form the chain.
In the accompanying drawings,
Figure 1 is a plan of part of a pattern chain with detachable lags as constructed
under our invention.
Figure 2 is a plan, Figure 3 a side elevation and Figure 4 an end elevation of a
single detachable lag of the chain.
As represented by these drawings the closed wire eyes and rings which serve to
link together the lags in the ordinary chain are replaced by an open eye or hook a
one on each side of the lag A at opposite ends thereof, a closed eye 6 and ring b¹
or short links being fitted on the ends opposite to those on which the eyes or hooks
are secured. In joining up the lags A to form the chain the closed rings 6' are
passed over the hooks a to which they are contiguous. In order to prevent the
rings becoming disengaged from the hooks a a spring C is attached to each side
of the lag and is adapted to close the open end of the hook a in proximity to which
it is placed; or in lieu of the blade spring C shown in the drawings the spring
may take the form of a movable latch constituting one side of the hook, thus forming
a snap hook. The spring or latch is pressed back in placing the closed ring 61
over the hook in linking together the lags to make up the chain and also in removing
the rings to detach the lags from each other.
The pegs a¹ in the lags A instead of being removable, as is necessary with the
ordinary construction of chain in order to permit of changing the pattern, are
permanently secured therein, the pattern being altered in the improved chain by
detaching any number of the lags and replacing them by others in which the pegs
are arranged to suit the pattern to be woven.
Instead of placing the open or spring closed hooks on opposite sides and at the
opposite ends of the lags as described, they may be fitted both on one side of each
lag, the other side being fitted with closed eyes and rings or connecting links; but
the arrangement first described is preferable inasmuch as it admits of the lags
being turned end for end in changing the pattern.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
.
1. A pattern chain for looms constructed as described with detachable cards or

page_text: 2. A lag or bar for a pattern chain constructed as described with open or spring
closed hooks on one or both sides.
Dated this 7th day of November 1896.
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62 St. Vincent Street, Glasgow, Agent for the Applicants.